BBC Russian

Preprint ARTICLE | doi:10.20944/preprints202407.0237.v1

The noise: a silent threat to the recovery of patients in Neonatal Intensive Care Units

Víctor M. Rodríguez-Montaño, Virginia Puyana Romero, Ricardo Hernández-Molina, Juan L Beira-Jiménez

Subject: Engineering, Architecture, Building And Construction Keywords: Neonatal Intensive Care Units; architectural design; acoustics; sources of noise.

Online: 3 July 2024 (00:23:46 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201710.0077.v1

Global Calibration of Multi-Cameras Based on Refractive Projection and Ray Tracing

Mingchi Feng, Xiang Jia, Jingshu Wang, Song Feng, Taixiong Zheng

Subject: Engineering, Other Keywords: camera calibration; multi-cameras system; ray tracing; glass checkerboard; bundle adjustment

Online: 12 October 2017 (04:55:15 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1328.v1

Spectral Properties of Bistatic Radar Signals using the Ray Tracing Technique and a Facet Approach

Mingcheng Zuo, Rukiah S. MiItri, Igor Gai, Gancorrado Brighi, Paolo Tortora

Subject: Physical Sciences, Space Science Keywords: Bistatic Radar; Surface Roughness; Ray Tracing

Online: 21 May 2024 (17:22:45 CEST)

Show abstract| Download PDF| Share

Working Paper ARTICLE

An Echo Intensity Calculation Method Based on DNN for SAR Ray-Tracing Simulation

Shengren Niu, Xiaolan Qiu

Subject: Computer Science And Mathematics, Algebra And Number Theory Keywords: deep neural network; differentiable rendering; electromagnetic scattering modeling; ray tracing; SAR image simulation

Online: 9 October 2020 (16:24:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201703.0089.v1

Scale-Dependent Light Scattering Analysis of Textured Structures on LED Light Extraction Enhancement Using Hybrid Full-Wave Finite-Difference Time-Domain and Ray-Tracing Methods

Tsung-Xian Lee, Ching-Chia Chou

Subject: Physical Sciences, Optics And Photonics Keywords: Light-emitting diodes; Light extraction efficiency; Textured structures; Light scattering; BSDF, BRDF, and BTDF

Online: 15 March 2017 (00:12:16 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202307.0943.v1

Evaluating Structural Details Influence on Elastic Wave Propagation for Composite Structures via Ray Tracing

Fernando Sanchez Iglesias, Antonio Fernández López

Subject: Engineering, Aerospace Engineering Keywords: SHM; wave propagation; composites; ray tracing

Online: 14 July 2023 (05:34:53 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1768.v1

Implementation of Portable Digital Chest X-Ray Machine for Tuberculosis Contact Tracing in Oyo and Osun States, Nigeria: A Formative Assessment

Aderonke Agbaje, Patrick Dakum, Olugbenga Daniel, Anyaike Chukwuma, Obioma Chijoke-Akaniro, Evaezi Okpokoro, Samuel Akingbesote, Christian Anyomi, Adekola Adekunle, Abiola Alege, Moroof Gbadamosi, Olutunde Babalola, Mensah Charles, Rupert Eneogu, Austin Ihesie, Debby Nongo, Ademola Adelekan

Subject: Public Health And Healthcare, Public Health And Health Services Keywords: Keywords Tuberculosis; Contact investigations; Portable X-ray machine

Online: 27 May 2024 (14:28:08 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201711.0158.v1

Solar Ray Tracing Analysis to Determine Energy Availability in a CPC Designed for Use as a Residential Water Heater

Miguel Terrón-Hernández, Manuel I. Peña-Cruz, J. G. Carrillo, Ulises Diego-Ayala, Vicente Flores

Subject: Engineering, Energy And Fuel Technology Keywords: ray tracing analysis; compound parabolic concentrator; solar water heating; photonics; optics

Online: 24 November 2017 (05:28:38 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints201807.0601.v1

Successful Aging and Chronic Osteoarthritis

Ray Marks

Subject: Medicine And Pharmacology, Orthopedics And Sports Medicine Keywords: aging; disability; healthy aging; osteoarthritis; pain, rehabilitation, successful aging

Online: 30 July 2018 (22:20:03 CEST)

Show abstract| Download PDF| Share

Preprint COMMUNICATION | doi:10.20944/preprints202107.0633.v1

Biofortification - Associated Costs and Finding Alternatives?

Avik Ray

Subject: Biology And Life Sciences, Anatomy And Physiology Keywords: Biofortification; Agro-biodiversity; HarvestPlus; Hidden Hunger; Orphan Crops; Wild edibles

Online: 28 July 2021 (16:18:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.0571.v1

Tracing the EoL-Tyre Management Chain in Togo with Focus of Implementing a Tyre Recycling Plant

Mona-Maria Narra, Djangbadjoa Gbiete, Komi Agboka, Satyanarayana Narra, Michael Nelles

Subject: Environmental And Earth Sciences, Waste Management And Disposal Keywords: End-of-Life tyres; Recycling; Togo; tyres

Online: 6 September 2024 (16:06:26 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202309.0886.v1

The Periodicity of Nuclear Magnetic Moments and Nucleon Binding Energies in Light Nuclides: Implications for Nuclear Structure

Ray Walsh

Subject: Chemistry And Materials Science, Inorganic And Nuclear Chemistry Keywords: nuclear periodicity; nuclear structure; shell model; nucleon pairing effect; quark structure; representational nuclear chemistry; nucleon binding energy; nuclear magnetic moment

Online: 13 September 2023 (11:13:57 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202405.1285.v1

Machine Learning Applications for Fault Tracing and Localization in Optical Fiber Communication Networks: A Review

Shiny Pearl Abdula, Mary Joy Llagas, Alessandra May Fernandez, Edwin Arboleda

Subject: Engineering, Electrical And Electronic Engineering Keywords: Machine Learning; Optical Fiber Networks; Anomaly Identification; Localization

Online: 20 May 2024 (13:06:23 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202312.1211.v1

A Closer Look at the Perivascular Unit in the Development of Enlarged Perivascular Spaces in Obesity, Metabolic Syndrome, and Type 2 Diabetes Mellitus

Melvin Ray Hayden

Subject: Biology And Life Sciences, Neuroscience And Neurology Keywords: Diabetic cerebral microvascular disease; Enlarged perivascular spaces; Glymphatic system; Neurovascular unit; Perisynaptic astrocyte endfeet; Perivascular astrocyte endfeet; Pervascular spaces; Perivascular unit; Postcapillary venule

Online: 15 December 2023 (18:12:25 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202402.1382.v2

Acoustic Characterization of Potential Quiet Areas in Dortmund, Germany

Bryce T. Lawrence, Andreas Frücht, Damian Heying, Kai Schröer, Dietwald Gruehn

Subject: Social Sciences, Geography, Planning And Development Keywords: Noise Action Plan; Noise Mapping; Quiet Areas; Biophony Mapping; Diel Patterns; Noise Hot Spot; Multiple Decision Criteria Assessment; Linear Combination Suitability Mapping

Online: 11 March 2024 (13:17:11 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202006.0352.v1

Proteins Nsp12 and 13 of SARS-CoV-2 Have Mitochondrial Recognition Signal: A Connection with Cellular Mitochondrial Dysfunction and Disease Manifestation

Upasana Ray, Feroza Begum

Subject: Biology And Life Sciences, Virology Keywords: SARS-CoV-2; ARDS; non-structural proteins; mitochondria

Online: 29 June 2020 (10:40:07 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202006.0240.v2

COVID-19 Contact Tracing: Challenges and Future Directions

Mohammad Jabed Morshed Chowdhury, Md Sadek Ferdous, Kamanashis Biswas, Niaz Chowdhury, Vallipuram Muthukkumarasamy

Subject: Computer Science And Mathematics, Information Systems Keywords: COVID-19; contact tracing; privacy; proximity technologies

Online: 14 July 2020 (05:07:34 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202101.0170.v1

Evaulation of a Model for Urban Vegetation Barriers’ Effects on Air Pollution

Ray F. Nassar

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Air pollution; environmental hazards; Volatile Organic Compounds

Online: 8 January 2021 (16:59:01 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202405.0498.v1

Cerebral Microbleeds Associate with Brain Endothelial Cell Activation-Dysfunction and Blood-Brain Barrier Dysfunction-Disruption with an Increased Risk of Hemorrhagic and Ischemic Stroke That Is Capable of Exacerbating Neurodegeneration

Melvin Ray Hayden

Subject: Biology And Life Sciences, Neuroscience And Neurology Keywords: Alzheimers Disease; BBB; Cerebral microbleeds; Dementia; Hypertension; MRI; Neurovascular unit; cerebral small vessel disease; Transmission electron microscopy

Online: 8 May 2024 (12:47:07 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202012.0332.v1

An Egocentric Network Contact Tracing Experiment

Andrew Pilny, C. Joseph Huber

Subject: Social Sciences, Media Studies Keywords: contact tracing; ego networks; experimental design; social networks; field theory

Online: 14 December 2020 (13:06:29 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints201706.0078.v1

On-chip High-finesse Fabry-Perot Microcavities for Optical Sensing and Quantum Information

Mohammad H. Bitarafan, Ray G. DeCorby

Subject: Physical Sciences, Optics And Photonics Keywords: Fabry-Perot microcavities; sensing; cavity QED; microcavity lasers

Online: 16 June 2017 (10:38:57 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202409.0259.v1

Paying Homage to Microvessel Remodeling and Small Vessel Disease in Neurodegeneration: Implications for the Development of Late-Onset Alzheimer’s Disease

Melvin Ray Hayden

Subject: Biology And Life Sciences, Neuroscience And Neurology Keywords: Brain endothelial cells; Blood-brain barrier; Dementia; Late-onset Alzheimer's disease; Microvessel remodeling; Neurodegeneration; Neurovascular unit; Small vessel disease

Online: 3 September 2024 (16:58:12 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202404.2015.v1

Antonio Mazzotti, Laura Langone, Simone Ottavio Zielli, Elena Artioli, Alberto Arceri, Lorenzo Brognara, Francesco Traina, Cesare Faldini

Subject: Medicine And Pharmacology, Orthopedics And Sports Medicine Keywords: Subtalar arthrorisis; Pediatric; flatfoot; hallux valgus angle; Intermetatarsal angle

Online: 30 April 2024 (15:02:54 CEST)

Show abstract| Download PDF| Share

Introduction: Subtalar Arthroereisis (STA) is a surgical intervention for pediatric flexible flatfoot (PFF), primarily targeting hindfoot alignment by limiting excessive subtalar eversion. However, its effects on forefoot parameters remain underexplored. This study aims to investigate radiological changes following STA in pediatric patients. Materials and Methods: A retrospective analysis was conducted on consecutive patients treated with STA for PFF. First ray-related angles, including Hallux Valgus Angle (HVA) and Inter-Metatarsal Angle (IMA), alongside hindfoot radiological parameters such as Meary, Calcaneal Pitch, and Costa Bartani angles, were assessed. Subgroup analysis by gender was performed, and correlations between demographic and pre-operative radiological parameters were examined. Results: Forty-one patients (81 feet) with a mean age of 11.6 years were included, with a mean follow-up duration of 6.4 months. No significant differences were observed in first ray-related an-gles pre- and post-operatively, with mean IMA changing from 7.97° to 7.18° and mean HV angles from 9.51° to 8.66°. Noteworthy improvements were seen in flat foot angles, including Meary, Calcaneal Pitch, and Costa Bartani angles, postoperatively. Age subgroup analysis revealed similar trends in IMA and HVA changes between Group A (operated before peak growth) and Group B (operated later). Higher preoperative angles tended to improve, while lower preoperative IMA and HVA tended to worsen postoperatively, all remaining within normal ranges. Conclusion: STA showed positive radiological outcomes for PFF treatment, while negligible changes in first ray-related angles were observed. Age subgroup analysis indicated similar trends regardless of operation timing. Higher preoperative angles tended to improve, while lower preoperative angles tended to worsen postoperatively, despite all falling within non-pathological ranges. Further re-search is warranted to confirm this correlation.

Preprint ARTICLE | doi:10.20944/preprints202305.2066.v1

All-Optical, Air-Coupled Ultrasonic Detection of Low-pressure Gas Leaks and Observation of Jet Tones in the MHz Range

Kyle G. Scheuer, Ray G. DeCorby

Subject: Physical Sciences, Acoustics Keywords: jet tone; leak detection; air-coupled ultrasound; optical ultrasound detection; optomechanics; buckled dome microcavity

Online: 30 May 2023 (07:30:52 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202405.0052.v1

Structure of Zn and Na Borophosphate Glasses by X-ray and Neutron Diffraction

Uwe Hoppe, Parker T. Freudenberger, Richard K Brow, Jozef Bednarcik, Alex C. Hannon

Subject: Chemistry And Materials Science, Ceramics And Composites Keywords: borophosphate glasses; short-range order; neutron diffraction; X-ray diffraction

Online: 1 May 2024 (07:15:04 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201701.0067.v1

Modeling Sound Propagation Using the Corrective Smoothed Particle Method with an Acoustic Boundary Treatment Technique

YongOu Zhang, Xu Li, Tao Zhang

Subject: Physical Sciences, Mathematical Physics Keywords: computational acoustics; meshfree method; Lagrangian approach; smoothed particle hydrodynamics; corrective smoothed particle method; boundary conditions; numerical method

Online: 13 January 2017 (10:09:35 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0344.v1

Low-energy Cosmic Rays and Associated MeV Gamma-ray Emissions in the Protoplanetary System

Xulei Sun, Shuying Zheng, Zhaodong Shi, Bing Liu, Ruizhi Yang

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Protoplanetary disk; Low-energy cosmic rays; Gamma rays; Nuclear de-excitation lines

Online: 4 July 2024 (00:18:52 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201702.0062.v1

A Probabilistic Approach to Small Fatigue Crack Initiation and Sizing Using Acoustic Emission

Azadeh Keshtgar, Mohammad Modarres

Subject: Engineering, Mechanical Engineering Keywords: acoustic emission; crack initiation; small crack growth; structural integrity; bayesian estimation

Online: 16 February 2017 (09:43:59 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints201608.0021.v1

E-waste Management in South Africa: Case Study: Cathode Ray Tubes Recycling Opportunities

Pontsho Ledwaba, Ndabenhle Sosibo

Subject: Environmental And Earth Sciences, Environmental Science Keywords: electrical and electronic waste; recycling; legislative frameworks; environmental management; landfilling

Online: 3 August 2016 (12:33:45 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1054.v1

From Cow to Climate: Tracing the Path of Dairy Sustainability: Unveiling the Impact on Sustainable Development Goals through Bibliometric and Literature Analysis

Mwirigi Douglas, Maria Fekete-Farkas, Borbély Csaba

Subject: Biology And Life Sciences, Agricultural Science And Agronomy Keywords: dairy farming; sustainability; sustainable development goals; bibliometric analysis; sustainable practices; environmental impact; milk production

Online: 19 June 2024 (11:00:21 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0340.v1

Evaluation of the Impact of Design Parameters on the Acoustic Environment Perceived by Primary Students

Constanza Ipinza-Olatte, Beatriz Piderit-Moreno, Maureen Trebilcock-Kelly

Subject: Engineering, Architecture, Building And Construction Keywords: acoustics; learning space; occupant comfort; acoustic design; noise annoyance

Online: 4 April 2024 (06:02:43 CEST)

Show abstract| Download PDF| Share

Preprint TECHNICAL NOTE | doi:10.3390/sci2020030

On Singular Perturbation of Neutron Point Kinetics in the Dynamic Model of a PWR Nuclear Power Plant

Xiangyi Chen, Asok Ray

Subject: Physical Sciences, Applied Physics Keywords: PWR nuclear power plants; point kinetics; singular perturbation

Online: 26 April 2020 (00:00:00 CEST)

Show abstract| Share

Preprint ARTICLE | doi:10.20944/preprints202403.0071.v2

Evaluation of the Ability of Using Shear-horizontal Surface Acoustic Wave Biosensors to Perform Sterility Testing of Nutrient Media

Eshiobomhe Sigmus Aimofumhe, Favour Badewole, Dy’Mond Smith, Kyndall N. Neeland, Ololade Adetula, Marlon Sheldon Thomas

Subject: Biology And Life Sciences, Biology And Biotechnology Keywords: shear-horizontal surface acoustic Wave (SH-SAW); biosensor; sterility testing; Escherichia coli K-12; phase shift

Online: 25 March 2024 (13:34:45 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0587.v1

Modelling of Propagation Characteristics of Acoustic Pulse from Partial Discharge in Polymeric Insulating Materials

Abdul Samad, Wah Hoon Siew, Martin J. Given, Igor V. Timoshkin, John Liggat

Subject: Engineering, Electrical And Electronic Engineering Keywords: Acoustic Emission; PD detection; High Voltage Insulation; Acoustic Propagation; Acoustic Reflections

Online: 8 April 2024 (17:21:39 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202010.0374.v2

On Soft Lebesgue Measure

Sujay Goldar, Subhasis Ray

Subject: Computer Science And Mathematics, Algebra And Number Theory Keywords: Soft Set, Soft Element, Soft Real Number, Soft Interval, Soft Sequence, Soft Lebesgue Measure.

Online: 8 December 2022 (07:52:16 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202208.0115.v1

Internet of Things Aware Secure Dew Computing Architecture for Distributed Hotspot Network: A Conceptual Study

Partha Pratim Ray, Karolj Skala

Subject: Computer Science And Mathematics, Computer Networks And Communications Keywords: Dew computing; Internet of Things; Blockchain; Hotspot Network

Online: 5 August 2022 (03:46:27 CEST)

Show abstract| Download PDF| Share

Preprint TECHNICAL NOTE | doi:10.20944/preprints202102.0618.v1

The Concept of Training Image-Based Geostatistics for Spatial Distribution of Hydraulic Conductivity

Fiaz Hussain, Ray-Shyan Wu

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Interpolation; Hydraulic Conductivity; Multi-Point Geostatistics; Training Image

Online: 26 February 2021 (12:47:53 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0221.v1

Solar Wind Charge-Exchange X-ray Emissions from the O⁵⁺ Ions in the Earth’s Magnetosheath

Zhicheng Zhang, Fei He, Xiao-Xin Zhang, Guiyun Liang, Xueyi Wang, Yong Wei

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: solar wind charge-exchange (SWCX); earth magnetosheath; X-Ray spectrum; interplanetary shock; bow shock; Magnetopause

Online: 2 April 2024 (15:13:11 CEST)

Show abstract| Download PDF| Share

Preprint COMMUNICATION | doi:10.20944/preprints202407.1673.v1

Address Social Injustices in Taxonomy: Implement Extended Revisions of Names with Ethical Issues and Persistent Identifiers for Tracing Name Changes

Desalegn Chala, Dag Endresen, Sebsebe Demissew, Laura A. Slaughter, Einar Broch Johnsen, Nils Chr. Stenseth

Subject: Biology And Life Sciences, Other Keywords: Catalogue of Life (COL); ethical issues in taxonomic names; nomenclature; Persistent ID; social injustices in taxonomic names; social equity in science; Taxonomy

Online: 22 July 2024 (07:41:48 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202103.0278.v1

Utilization of Mosque as A Part of Early Warning Systems to Reduce Flood Damage in Samarinda City, Indonesia

Riyan Benny Sukmara, Ray Shyan Wu

Subject: Engineering, Civil Engineering Keywords: flooding, early warning, damage, mosque

Online: 10 March 2021 (13:01:45 CET)

Show abstract| Download PDF| Share

Samarinda City is one of the most attractive cities in Borneo Island (Indonesia) and also as a capital city of EastBorneo Province. The expansion of urban areas becomes essential due to rapid population and housing demand. Base on the statistical report, the annual population growth rate is 0.018% from the year 2016-2017 with a total population of 843446 inhabitants. Many natural disasters occur in some areas in this city, especially flooding. This natural disaster occurs almost every year, many people suffered and forced to evacuate. In 2018 there is 3 flood event with 28311 people was suffered and evacuated, and 5170 houses were flooded [1]. During the flood event, it was very possible to gain damages to their property and make traffic stuck. One common way to reducing the damages is using Early Warning Systems (EWS). Early warning is a major element for disaster risk reduction, including damages. To prevent and mitigate the impact of a disaster, many countries had taken action to build various methods of a public warning system. An effective early warning system focused on people-centered and comprises the following element, such as risk knowledge, technical monitoring and service, communication and dissemination of warnings, and community response capability [2]. Related to the existing condition which Samarinda is a Muslim-dominated city and obviously has a lot of a number of mosques. This is a good potency to develop an early warning system because every mosque has a loudspeaker for echoing Adzan (Muslim prayer-calling). With this existing condition, the loudspeaker can be utilized as a flood outdoor-voice warning announcer. The aim of this study is to briefly introduce the strategy of dissemination early warning by utilizing mosques. The hope of early warning dissemination is giving enough time to the people to evacuate their property to reduce damages and possibly to giving information to avoiding traffic stuck (in a certain location)due to flooding. The results of this study can be used as input for decision-makers to develop effective flood management strategies and policies, especially in the case of an early warning system where not well-developed in Samarinda.

Preprint ARTICLE | doi:10.20944/preprints202305.2216.v1

Impact of Cooperation and Intra-Specific Competition of Prey on the Stability of Prey-Predator Models with Refuge

Soumyadip Pal, Fahad Al Basir, Santanu Ray

Subject: Computer Science And Mathematics, Applied Mathematics Keywords: Mathematical modeling; Bifurcation analysis; Global stability; Direction of Hopf bifurcation; Numerical simulations

Online: 31 May 2023 (10:42:32 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.2009.v1

Characterization of Na_0.5Bi_0.5TiO₃ Single Crystals by X-ray Diffraction, Scanning Electron Microscopy, X-ray Photoelectron Spectroscopy, Optical Absorption, Electric and Thermoelectric Properties Studies

Jan J.Suchanicz, Kamila Kluczewska-Chmielarz, Grzegorz Jagło, Andrzej Kruk, Antoni Kania, Dorota Sitko, Michalina Nowakowska-Malczyk, Marcin Łapiński, Grzegorz Stachowski, Tatiana Kruzina

Subject: Chemistry And Materials Science, Electronic, Optical And Magnetic Materials Keywords: Na_0.5Bi_0.5TiO₃ single crystals; insulator-metal transition; electrical conductivities; relaxation process

Online: 30 May 2024 (10:42:39 CEST)

Show abstract| Download PDF| Share

High-quality and large-size single crystals of lead-free Na0.5Bi0.5TiO3 were grown using the Czo-chralski technique. The crystals had pure perovskite structure with rhombohedral symmetry and were translucent in the visible and near infrared spectral ranges recorded in the interval 350-1050 nm. The energy gaps determined from the X-ray photoelectron spectroscopy (XPS) and optical measurements were approximately 2.92 eV. The current-voltage characteristics, depolarization current, dc (σdc) and ac (σac) electrical conductivity, and Seebeck coefficient of the crystals were investigated. The frequency/temperature-dependent electrical properties were also measured and analyzed through complex impedance spectroscopy. An overlapping reversible insulator-metal transition (resistive switching) on nanoscales, caused by the electric field, was detected. This was the first time that most of these investigations were performed for this material. The following conductivity mechanisms of NBT single crystals were identified: (i) quasi-free electron and hole conduction and hopping-charges mechanism at low temperatures, (ii) small polaron conductivity in the middle temperature range, and (iii) a significant contribution of the oxygen vacancies to conductivity in the high temperature range. The activation energy values determined from the conductivity data, the imaginary part of the electric impedance and the modulus indicate that the relaxation process in the high-temperature range is attributable to both single and double ionized oxygen vacancies, in combination with the hopping of electrons between Ti4+ and Ti3+. P-type electrical conductivity was also found. These discoveries create new possibilities of reducing the electrical conductivity of NBT and improving the process of effectively poling this material. The density of the electronic states was investigated using an ab initio method. The energy gap cal-culated for NBT (R3c) was 2.8 eV, and is well comparable to those determined from XPS and optical measurements. Our results indicate the possibility of tuning material properties by inten-tionally creating non-stoichiometry/structural defects (oxygen vacancies, cation excess and cation deficiency).

Preprint ARTICLE | doi:10.20944/preprints201703.0016.v1

A 14-bit Hybrid Incremental Sigma-Delta/Cyclic ADC for X-ray Linear Array Sensor

Yuze Niu, Yacong Zhang, Zhuo Zhang, Miaomiao Fan, Wengao Lu, Zhongjian Chen

Subject: Engineering, Electrical And Electronic Engineering Keywords: hybrid ADC; sigma-delta ADC; cyclic ADC; pseudo-differential OTA; X-ray sensor

Online: 2 March 2017 (08:37:48 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201805.0309.v1

Acoustic Design of a Classical Concert Hall and Evaluation of its Acoustic Performance – A Case Study

Kwangbok Jeong, Taehoon Hong, Sung Hoon Kim, Jimin Kim, Sangyoub Lee

Subject: Engineering, Architecture, Building And Construction Keywords: Acoustic design; Reverberation time; Clarity; Lateral fraction; Acoustic measurements; Classical concert hall

Online: 22 May 2018 (13:49:31 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0956.v1

Research on Acid Aging and Damage Pattern Recognition of GFRP Oil-Gas Gathering Pipeline Based on Acoustic Emission

Haisheng Bi, Yuhong Zhang, Chen Zhang, Chunxun Ma, Yuxiang Li, Guang Wang, Jiaxu Miao, Haoran Cheng

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: GFRP pipe; pattern recognition; four-point bend; acoustic emission; waveform analysis

Online: 12 July 2024 (04:27:56 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.0862.v1

Enabling Low-Dose In Vivo Benchtop X-ray Fluorescence Computed Tomography through Deep Learning-Based Denoising

Naghmeh Mahmoodian, Mohammad Rezapourian, Asim Abdulsamad Inamdar, Kunal Kumar, Melanie Fachet, Christoph Hoeschen

Subject: Engineering, Bioengineering Keywords: Deep learning; Artificial Intelligence; Xray Fluorescence; XFCT; AI; DL

Online: 14 March 2024 (12:26:34 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202006.0308.v1

Measuring Transnational Social Fields Through Binational Link-tracing Sampling

Marian-Gabriel Hancean, Miranda Jessica Lubbers, Jose Luis Molina

Subject: Social Sciences, Sociology Keywords: transnational social fields; social network analysis; migration; sampling; binational link-tracing; statistical network models

Online: 26 June 2020 (12:11:01 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints201805.0096.v1

Acoustic Metamaterials in Aeronautics

Giorgio Palma, Huina Mao, Lorenzo Burghignoli, Peter Göransson, Umberto Iemma

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: metamaterials; aviation noise; aeroacoustics; noise absorption; noise reflection; noise trapping; acoustic cloaking

Online: 4 May 2018 (15:05:21 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0433.v1

Astrosat SXT X-ray Spectrum Changes over the 35-Day Cycle in Hercules X-1

Denis Leahy, Riddhiman Sharma

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: binaries; eclipsing — star; neutron— stars; individual (HZ Her/ Her X-1)

Online: 7 June 2024 (08:00:20 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints201908.0057.v1

Hijacking the Host Immune Cells by Dengue Virus: Molecular Interplay of Receptors and Dengue Virus Envelope

Feroza Begum, Sandeepan Das, Debica Mukherjee, Upasana Ray

Subject: Biology And Life Sciences, Virology Keywords: DENV; tropism; receptors; entry; immune cells

Online: 5 August 2019 (08:14:40 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202308.0847.v1

MicroRNA-34 Family in Cancers: Role, Mechanism, and Therapeutic Potential

Junjiang Fu, Saber Imani, Mei-Yi Wu, Ray-Chang Wu

Subject: Biology And Life Sciences, Life Sciences Keywords: microRNA; miR‐34; tumor suppressor; miRNA therapy

Online: 10 August 2023 (10:53:25 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202206.0052.v1

A Study of McVittie Spacetime in Stationary and Dynamical Regime

Indranath Bhattacharyya, Saibal Ray, Riju Nag, Samudra Sundar Nag

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Einstein equations; McVittie solution; black hole; dark energy; embedded spacetime

Online: 6 June 2022 (03:17:36 CEST)

Show abstract| Download PDF| Share

Preprint TECHNICAL NOTE | doi:10.20944/preprints201611.0098.v1

Nonlinear Vibration Response of a Rectangular Tube with a Flexible End and Non-Rigid Acoustic Boundaries

Y. Y. Lee

Subject: Engineering, Mechanical Engineering Keywords: nonlinear plate vibration; structural acoustics; harmonic balance method

Online: 18 November 2016 (10:13:10 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201912.0401.v1

Tracing the Origin of Planktonic Protists in an Ancient Lake

Nataliia V. Annenkova, Caterina R. Giner, Ramiro Logares

Subject: Biology And Life Sciences, Immunology And Microbiology Keywords: microbial eukaryotes; phylogeography; marine-freshwater transitions; evolutionary radiation; species flocks; Lake Baikal

Online: 31 December 2019 (03:57:14 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202005.0450.v1

COVID-19 in a Rural Community: Outbreak Dynamics, Contact Tracing and Environmental RNA

Isabel G. Fernández de Mera, Francisco J. Rodríguez del Río, José de la Fuente, Marta Pérez Sancho, Dolores Hervas, Inma Moreno, Mercedes Dominguez, Lucas Domínguez, Christian Gortázar

Subject: Medicine And Pharmacology, Epidemiology And Infectious Diseases Keywords: epidemiology; transmission dynamics; isolated population; Spain

Online: 27 May 2020 (09:05:14 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202311.0587.v1

Women of Color in the Health Professions: A Scoping Review of the Literature

Olihe Okoro, Omolayo Umaru, Meghana Ray

Subject: Social Sciences, Gender And Sexuality Studies Keywords: Intersectionality; Healthcare professions; Women of color; Pharmacy; Racial/Ethnic inequity; Gender inequity; Discrimination; Professional advancement; Underrepresentation

Online: 9 November 2023 (07:29:41 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202004.0351.v1

BCG Vaccination Strategy for Preventaion against COVID-19: Hype or Hope?

Keshav Rajarshi, Aroni Chatterjee, Shashikant Ray

Subject: Biology And Life Sciences, Immunology And Microbiology Keywords: COVID-19; BCG immunization; SARS-CoV-2; immunity and tuberculosis

Online: 19 April 2020 (13:55:50 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202207.0061.v1

Coastal Upwelling in the Bay of Bengal: Role of Local and Remote Windstress

Sthitapragya Ray, Debadatta Swain, M. M. Ali, Mark A. Bourassa

Subject: Environmental And Earth Sciences, Oceanography Keywords: Coastal upwelling; Upwelling index; Scatterometer; Wind stress; Kelvin Wave; Ekman Transport

Online: 5 July 2022 (05:36:03 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201701.0059.v1

Optimization of Lactoperoxidase and Lactoferrin Separation on an Ion-Exchange Chromatography Step

Naeimeh Faraji, Yan Zhang, Ajay K. Ray

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: cation exchange chromatography; minor milk protein; response surface modeling; simulation; steric mass action (SMA); optimization

Online: 12 January 2017 (09:59:40 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201711.0147.v1

A Comparative Analysis of the Proteins and Lipids in Breast, Leg, and Thigh Meats of a Commercial Domesticated Turkey

W. Keith Ray, Sherry B. Hildreth, Judith M. Jervis, Richard F. Helm

Subject: Biology And Life Sciences, Food Science And Technology Keywords: glycolysis; lipidome; meat; mitochondria; oxidation; proteome; turkey

Online: 23 November 2017 (03:11:04 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202209.0038.v1

Coastal Upwelling in the western Bay of Bengal: Role of Local and Remote Windstress

Sthitapragya Ray, Debadatta Swain, M. M. Ali, Mark A. Bourassa

Subject: Environmental And Earth Sciences, Oceanography Keywords: Coastal upwelling; Upwelling index; Scatterometer; Wind stress; Kelvin Wave; Ekman Transport

Online: 2 September 2022 (09:57:06 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202004.0281.v2

Mutation Hot Spots in Spike Protein of SARS-CoV-2 Virus

Feroza Begum, Arup Kumar Banerjee, Upasana Ray

Subject: Biology And Life Sciences, Virology Keywords: COVID-19; SARS-CoV-2; S protein; RBD; S1; S2

Online: 7 September 2020 (04:15:59 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201804.0068.v1

Researcher Conduct Determines Data Reliability

Mark N. Wass, Larry Ray, Martin Michaelis

Subject: Social Sciences, Behavior Sciences Keywords: reproducibility crisis; replication crisis; data reliability; bias; publication bias; meta-research

Online: 5 April 2018 (10:54:09 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202102.0038.v1

Detection of Chymotrypsin by Optical and Acoustic Methods

Ivan Piovarci, Tibor Hianik, Ilia N. Ivanov

Subject: Biology And Life Sciences, Biophysics Keywords: chymotrypsin; β-casein; nanoparticles; UV-Vis spectroscopy; dynamic light scattering; quartz crystal microbalance.

Online: 1 February 2021 (13:59:40 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1501.v1

X-ray Microtomography Analysis of Integrated Crop-Livestock Production Impact on Soil Pore Architecture

José V. Gaspareto, Luiz Fernando Pires

Subject: Environmental And Earth Sciences, Soil Science Keywords: Computed tomography; Image analysis; Minimum tillage; No-tillage; Soil structure; Soil management; Soil porous structure

Online: 23 May 2024 (07:35:24 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201701.0064.v1

Identification of Secondary Phases in Cu₂ZnSnS₄ Layers by In-depth Resolved X-ray Photoelectron Spectroscopy Analysis

Xianfeng Zhang, M. Kobayashi

Subject: Chemistry And Materials Science, Other Keywords: secondary phases; CZTS film; XPS

Online: 12 January 2017 (11:04:27 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202208.0136.v1

Nonsingular phantom cosmology in Five Dimensional f(R,T) Gravity

Rakesh Ranjan Sahoo, Kamal Lochan Mahanta, Saibal Ray

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Phantom energy; LRS Bianchi type-I; $f(R,T)$ theory; $5d$ spacetimes

Online: 8 August 2022 (08:11:41 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202102.0524.v1

Flood Management in Samarinda, Indonesia: Recent Progress

Riyan Benny Sukmara, Ray Shyan Wu, Ariyaningsih Ariyaningsih

Subject: Engineering, Automotive Engineering Keywords: urban flooding; flood management; flood disaster; Samarinda;

Online: 23 February 2021 (15:46:35 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201810.0153.v1

Cosmic-Ray Extremely Distributed Observatory: Status and Perspectives

Dariusz Gora

Subject: Physical Sciences, Atomic And Molecular Physics Keywords: Cosmic-rays; Citizien Science; Extensive air showers

Online: 8 October 2018 (15:45:43 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202401.0195.v1

Digital Miniature Cathode Ray Magnetometer

Marcos Turqueti, Gustav Wagner, Azriel Goldschmidt, Rebecca Carney

Subject: Engineering, Electrical And Electronic Engineering Keywords: Magnetometer; Magnetic Probe; Imager; Cathode Ray; Undulator; DSP; CMOS sensor; Cryo-genic; Cold Electronics; Magnetoencephalography

Online: 4 January 2024 (03:38:17 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202202.0227.v1

On the Ray-Wavefront Duality

Antonio Diaz-Cano, Francisco Gonzalez-Gascon, Luis Sanchez-Soto

Subject: Physical Sciences, Optics And Photonics Keywords: geometrical optics; ray equation; eikonal equation; wavefronts

Online: 18 February 2022 (09:02:06 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202010.0298.v2

Cosmic Ray Extremely Distributed Observatory

Piotr Homola, Dmitriy Beznosko, Gopal Bhatta, Łukasz Bibrzycki, Łukasz Bratek, Michalina Borczyńska, Nikolay M. Budnev, Dariusz Burakowski, David Edwin Alvarez-Castillo, Kevin Almeida Cheminant, Aleksander Ćwikła, Punsiri Dam-o, Niraj Dhital, Alan Duffy, Piotr Głownia, Krzysztof Gorzkiewicz, Dariusz Góra, Alok C. Gupta, Zuzana Hlávková, Martin Homola, Joanna Jałocha, Robert Kamiński, Michał Karbowiak, Marcin Kasztelan, Renata Kierepko, Marek Knap, Péter Kovács, Szymon Kuliński, Bartosz Łozowski, Marek Magryś, Mikhail V. Medvedev, Justyna Mędrala, Jerzy W. Mietelski, Justyna Miszczyk, Alona Mozgova, Antonio Napolitano, Vahab Nazari, Y. Jack Ng, Michał Niedźwiecki, Cristina Oancea, Bogusław Ogan, Gabriela Opiła, Krzysztof Oziomek, Maciej Pawlik, Marcin Piekarczyk, Bożena Poncyljusz, Jerzy Pryga, Matías Rosas, Krzysztof Rzecki, Jilberto Zamora-Saa, Katarzyna Smelcerz, Karel Smolek, Weronika Stanek, Jarosław Stasielak, Slawomir Stuglik, Jolanta Sulma, Oleksandr Sushchov, Manana Svanidze, Kyle Tam, Arman Tursunov, José-M. Vaquero, Tadeusz Wibig, Krzysztof W. Woźniak

Subject: Physical Sciences, Nuclear And High Energy Physics Keywords: cosmic rays; cosmic ray ensembles; extensive air showers; large scale cosmic ray correlations; CREDO Collaboration

Online: 15 October 2020 (16:13:43 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202104.0293.v1

Path Tracing Photons Oscillating Through Alternate Universes Inside a Black Hole

Deep Bhattacharjee

Subject: Physical Sciences, Acoustics Keywords: Photon Spheres, Jacobi Lines, Turning Points, Photon Trajectories, Geodesics, Path Tracing Curves, Oscillation Points, Half-Librations

Online: 12 April 2021 (12:37:30 CEST)

Show abstract| Download PDF| Share

Working Paper REVIEW

COVID-19: Cross-border contact tracing in Germany, February-April 2020

Inessa Markus, Gyde Steffen, Raskit Lachmann, Adine Marquis, Timm Schneider, Sara Tomczyk, Uwe Koppe, Anna Maria Rohde, Susanne Barbara Schink, Janna Seifried, Teresa Domaszewska, Ute Rexroth, Maria an der Heiden

Subject: Medicine And Pharmacology, Immunology And Allergy Keywords: pandemic preparedness; contact tracing; cross-broader; International Health Regulations; Early Warning and Response System (EWRS) COVID-19; SARS-CoV-2; Germany

Online: 7 December 2020 (12:02:23 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202001.0269.v1

Tracing Microalloy Precipitation in Nb-Ti HSLA Steel During Austenite Conditioning

Johannes Webel, Adrian Herges, Dominik Britz, Eric Detemple, Volker Flaxa, Hardy Mohrbacher, Frank Mücklich

Subject: Chemistry And Materials Science, Metals, Alloys And Metallurgy Keywords: Niobium-titanium microalloyed steel; Electrical resistivity; Atom probe tomography; Solute niobium; Scanning transmission electron microscopy

Online: 23 January 2020 (16:15:44 CET)

Show abstract| Download PDF| Share

Microalloying of low carbon steel with niobium (Nb) and titanium (Ti) is standardly applied in high-strength low-alloy (HSLA) steels enabling austenite conditioning during thermo-mechanical controlled processing (TMCP), which results in pronounced grain refinement in the finished steel. The metallurgical effects of microalloying elements are related solute drag and precipitate particle pinning, both acting on the austenite grain boundary thereby delaying or suppressing recrystallization of the deformed grain. In that respect it is important to better understand the precipitation kinetics as well as the precipitation sequence in a typical Nb-Ti-microalloyed steel. Various characterization methods have been utilized in this study for tracing microalloy precipitation after simulating different austenite TMCP conditions in a Gleeble apparatus. Atom probe tomography (APT), scanning transmission electron microscopy in a focused ion beam equipped scanning electron microscope (STEM-on-FIB) and electrical resistivity measurements provide complementary information on the precipitation status and are correlated with each other. It will be demonstrated that accurate electrical resistivity measurements can monitor the general consumption of solute microalloys (Nb) during hot working which was complemented by APT measurements of the steel matrix. On the other hand, STEM revealed that a large part of Nb-containing particles during hot working are co-precipitated with titanium during cooling from the austenitizing temperature. Precipitates that form during cooling or isothermal holding can be distinguished from strain-induced precipitates by corroborating STEM measurements with APT results. APT specifically allows obtaining detailed information about the chemical composition of precipitates as well as the distribution of elements inside the particle. Electrical resistivity measurement, on the contrary, provides macroscopic information on the progress of precipitation and can be calibrated by APT. The current paper highlights the complementarity of these methods and shows first results within the framework of a larger study on strain-induced precipitation.

Preprint ARTICLE | doi:10.20944/preprints202405.1105.v1

Influence of Local Thermodynamic Non-Equilibrium to Photothermally Induced Acoustic Response of Complex Systems

Slobodanka P. Galovic, Aleksa Djordjevic, Bojan Kovacevic, Katarina Djordjevic, Dalibor Chevizovich

Subject: Physical Sciences, Condensed Matter Physics Keywords: heat transfer; irreversibility; local non-equilibrium; time delayed equation; fractional calculus; subdiffusion; Mittag-Leffler function; time-domain photoacoustic

Online: 16 May 2024 (12:18:07 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202312.0113.v1

Vehicle PEPS System with Intelligent Internet of Things

Ray-I Chang, Tzu-Chieh Lin, Jeng-Wei Lin

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Passive Entry Passive Start; Smart Watch; Electrocardiogram; Long Short-Term Memory; Auto Encoder; Collective Decision

Online: 4 December 2023 (04:26:06 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202310.2036.v1

Acoustic-Hydraulic Nozzle for Fine Spray and High Performance

Olga Kudryashova, Andrey Shalunov, Dmitry Genne, Roman Dorovskikh, Sergey Titov

Subject: Engineering, Chemical Engineering Keywords: Liquid atomization; ultrasound; acoustic-hydraulic nozzle; droplet dispersion; cavitation, critical mode.

Online: 31 October 2023 (09:34:24 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202003.0313.v3

Small-Object Detection in Remote Sensing Images with End-to-End Edge-Enhanced GAN and Object Detector Network

Jakaria Rabbi, Nilanjan Ray, Matthias Schubert, Subir Chowdhury, Dennis Chao

Subject: Computer Science And Mathematics, Computer Vision And Graphics Keywords: object detection; faster region-based convolutional neural network (FRCNN); single-shot multibox detector (SSD); super-resolution; remote sensing imagery; edge enhancement; satellites

Online: 29 April 2020 (13:33:56 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1623.v2

Methodologies Toward Optimization of Y₂O₃:Eu@SiO₂ Nanoparticles as Photosensitizers for X-Ray Activated Photodynamic Therapy (XPDT) of Cancer

Hannah J. Zhang, Tristan Ide, Maharajan Sivasubramanian, Lara Leoni, Jeffrey S. Souris, Divya Brahmbhatt, Eve Tanios, Ariel Pan, Shih-Hsun Cheng, Nai-Tzu Chen, Leu-Wei Lo, Chin-Tu Chen

Subject: Medicine And Pharmacology, Clinical Medicine Keywords: Cancer; Y₂O₃:Eu@SiO₂Nanoparticles; Photodynamic Therapy; Photosensitizer ; ;

Online: 23 July 2024 (09:47:03 CEST)

Show abstract| Download PDF| Share

Traditional photodynamic therapy (PDT) is often limited in its efficacy by insufficient light penetration, inefficient photosensitizer energy transfer, and inadequate target tissue oxygenation. X-ray activated PDT (XPDT), using nanoparticle (NPs) photosensitizers comprised of europium-doped yttrium oxide cores encased within silica shells (Y₂O₃:Eu@SiO₂), offers the potential of overcoming most of these limitations. Aimed at maximizing the generation of reactive oxygen species (ROS), this study reports methodologies for investigation of the effects of synthesis conditions on the characteristics of Y₂O₃:Eu@SiO₂NP. Transmission electronic microscope (TEM) revealed that the NP core diameter was linearly, positively correlated with condensation time (R2 = 0.7357, p < 0.05) and linearly, negatively correlated with urea concentration (R2 = 0.958, p < 0.05). The addition of cetyltrimethylammonium bromide (CTAB) during core synthesis demonstrated enhanced particle dispersion. Silica coating via APTES-1 and TEOS-3 conditions resulted in Y₂O₃:Eu@SiO₂ NPs that generated the highest ROS, with 8.7-fold and 8.9-fold increase respectively in relative fluorescence intensity at 8 Gy irradiation compared to a 5.2-fold increase in PBS under the same condition. In vivo evaluation using 18F-fluorothymidine positron emission tomography (18F-FLT PET) of mouse xenografts of a human prototypical cancer (ovarian) revealed a 55% reduction in tumor proliferation of radiation-sensitive CAOV3 tumors treated with Y₂O₃:Eu@SiO₂ NPs compared to a 19% reduction in tumor proliferation of radiation-resistant SKOV3 tumors on the fourth day post-treatment. Taken together, these findings suggest Y₂O₃:Eu@SiO₂ NPs can serve as effective photosensitizers for XPDT and their performance characteristics can be optimized by selecting synthesis conditions and parameters to deliver the desirable therapeutic effects, offering novel approaches to circumventing many of the limitations of conventional PDT in the treatment of cancer.

Preprint ARTICLE | doi:10.20944/preprints202405.1510.v1

Synthesis, Characterization, X-ray Molecular Structure, Antioxidant, Antifungal and Allelopathic Activity of a new Isonicotinate-derived meso-Tetraarylporphyrin

Nour Elhouda Dardouri, Soukhayna Hrichi, Pol Torres, Raja Chaâbane-Banaoues, Alessandro Sorrenti, Thierry Roisnel, Ilona Turowska-Tyrk, Hamouda Baba, Joaquim Crusats, Albert Moyano, Habib Nasri

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: free base porphyrin; isonicotinic acid; X-ray molecular structure; UV-visible; fluorescence; antioxidant activity; antifungal activity; allelopathic activity

Online: 23 May 2024 (12:30:45 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202306.2011.v1

Gamma Ray Pulsars and Opportunities for the MACE Telescope

Atul Pathania, K. K. Singh, Kuldeep Kumar Yadav

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Pulsars; gamma-rays; MACE Telescope

Online: 29 June 2023 (07:23:19 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.0083.v1

Communicating about Sex Is Important in Generating Positive Perceptions about One’s Sexual and Romantic Life. The Last Decade Has Provided Insight into the Theoretical Applications on Sex Communication Research. While the Focus on Extant Research Focuses

Andre Fedd, Jennifer Anne Samp, Colter Ray

Subject: Social Sciences, Gender And Sexuality Studies Keywords: Sex Talk, Communicative Processes, Theory Development, Interpersonal Relationships, Sexual Behaviors

Online: 4 March 2024 (09:52:31 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1759.v1

Tracing the Paths of Resilience: Longitudinal Studies on Overcoming Early-Life Adversity

Muzamil Hussain

Subject: Social Sciences, Behavior Sciences Keywords: resilience; early-life adversity; longitudinal studies; risk factors; protective factors; development; growth

Online: 28 April 2024 (08:59:42 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202401.0473.v1

Tracing the Source Population of Asian Giant Hornet Caught in Nanaimo, Canada

Alexa Freeman, Xuhua Xia

Subject: Biology And Life Sciences, Ecology, Evolution, Behavior And Systematics Keywords: Vespa mandarinia; invasive species; conservation biology; DNA barcoding; phylogeography; geophylogeny

Online: 5 January 2024 (14:25:30 CET)

Show abstract| Download PDF| Share

Asian giant hornet, Vespa mandarinia, is an invasive species that could potentially destroy local honeybee industry in North America. It has been observed to nest in the coastal regions of British Columbia in Canada and Washington State in USA. What is the source population of the immigrant hornets? The identification of the source population can not only shed light on the route of immigration, but also on the similarity between the native habitat and the potential new habitat in the Pacific Northwest. We analyzed mitochondrial COX1 sequences of specimens sampled from multiple populations in China, South Korea, Japan and the Russian Far East. V. mandarinia exhibits phylogeographic patterns, forming monophyletic clades for 16 specimens from China, six specimens from South Korea and two specimens from Japan. The two mitochondrial COX1 sequences from Nanaimo, British Columbia are identical to the two sequences from Japan. The COX1 sequence from Blaine, Washington State, clustered with those from South Korea, and is identical to one sequence from South Korea (GenBank accession MN716828). Our geophylogeny, which allows visualization of genetic variation over time and space, provides evolutionary insights on the evolution and speciation of three closely related vespine species (V. tropica, V. soror and V. mandarinia). The geophylogeny also highlights a strong insufficiency in sample collection in China. The existing sequenced specimens from mainland China with geographic coordinates were represent only four provinces, missing populations along the coastal regions in East China. One therefore cannot exclude the possibility that the Asian giant hornet found in Canada and USA may also be identical to V. mandarinia in Eastern China. We strongly recommend more extensive DNA barcoding data with geographic information and longer DNA barcode (e.g., the entire mitochondrial genome) so that critical questions on invasive species and environmental conservation can be addressed more accurately than what is possible with existing data.

Preprint ARTICLE | doi:10.20944/preprints202007.0502.v1

Blockchain-enable Contact Tracing for Preserving User Privacy During COVID-19 Outbreak

Md. Murshedul Arifeen, Abdullah Al Mamun, M Shamim Kaiser, Mufti Mahmud

Subject: Computer Science And Mathematics, Information Systems Keywords: COVID-19; contact tracing; privacy concern; secure communication; healthcare data; blockchain

Online: 22 July 2020 (06:19:47 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202406.1841.v1

Treatment of Acute and Long-COVID, Diabetes, Myocardial Infarction, and Alzheimer’s Disease: The Potential Role of a Novel Nano-Compound – the Transdermal Glutathione-Cyclodextrin Complex

Ray Yutani, Vishwanath Venketaraman, Nisar Sheren

Subject: Medicine And Pharmacology, Clinical Medicine Keywords: Oxidative stress; reactive oxygen species; antioxidants; glutathione; glutathione-cyclodextrin complex

Online: 26 June 2024 (11:56:54 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201808.0019.v1

X-ray Shaping of Planetary Nebulae

Martin A Guerrero

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: planetary nebula; X-ray; stellar evolution

Online: 1 August 2018 (12:04:48 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202312.0957.v1

Fundamental Components and Principles of Supervised Machine Learning Workflows with Numerical and Categorical Data

Styliani I. Kampezidou, Archana Tikayat Ray, Anirudh Prabhakara Bhat, Olivia J. Pinon Fischer, Dimitri N. Mavris

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Machine learning workflow; Supervised learning; Numerical data; Categorical data; Data engineering; Extraction, loading, transformation; Feature engineering; Automated feature extraction; Machine learning engineering; Training, validation, evaluation; Test-driven development; Automated machine learning; Model deployment

Online: 13 December 2023 (08:00:49 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202205.0223.v1

DeSci - Decentralized Science

Jens Ducrée, Martin Codyre, Ray Walshe, Sönke Barting

Subject: Engineering, Control And Systems Engineering Keywords: digitization; virtualization; digital twin; blockchain; crowdsourcing; decentralization; non-fungible token; NFT; smart contract; oracle; tokenization; digital ownership; consensus; governance; trust; incentivization; staking; reputation systems; reproducibility crisis; exponentiality; digital twin; metaverse; DeSci; decentralized science; citizen science; open science; distributed ledger; digital scarcity

Online: 17 May 2022 (05:50:03 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202101.0309.v1

Identification of Long-term Behavior of Natural Circulation Loops: A Thresholdless Approach from an Initial Response

Chandrachur Bhattacharya, Ritabrata Saha, Achintya Mukhopadhyay, Asok Ray

Subject: Computer Science And Mathematics, Mathematics Keywords: Natural circulation loops; Symbolic time series analysis; Early detection of anomalous events

Online: 18 January 2021 (09:52:01 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202301.0015.v1

Improving the Directionality of Low-Frequency Acoustic Radiation by a Finite Array of Quadrupolar Sources with Acoustic Metamaterials

Qinglei Zeng, Shenlian Gao, Yun Lai, Xiaozhou Liu

Subject: Physical Sciences, Acoustics Keywords: Acoustic metamaterials; F-P resonance effect; Two-dimensional Helmholtz resonator; Linear array; Dipole; Quadrupole

Online: 3 January 2023 (07:58:17 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202312.1444.v1

zk-DASTARK: A quantum-resistant, data authentication and zero-knowledge proof scheme for protecting data feed to smart contracts

Usama Habib Chaudhry, Razi Arshad, Ayesha Khalid, Indranil Gosh Ray, Mehdi Hussain

Subject: Computer Science And Mathematics, Information Systems Keywords: Decentralized Applications; Authenticated Data; Blockchain; Smart Contract; Privacy; Zero Knowledge Proof; zk-STARK; Quantum-Resistant

Online: 19 December 2023 (11:28:04 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201805.0169.v1

The Presence of Toxic and Non-toxic Cyanobacteria in the Sediments of the Limpopo River Basin: Implications for Human Health

Murendeni Magonono, Paul Johan Oberholster, Shonhai Addmore, Makumire Stanley, Jabulani Ray Gumbo

Subject: Environmental And Earth Sciences, Environmental Science Keywords: cyanobacteria; cyanotoxins; nutrient enrichment; akinetes; harmful algal blooms; PCR; phylogenetic analyses

Online: 10 May 2018 (15:37:51 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202311.0372.v1

Geodesic structure of generalized Vaidya spacetime through the K-essence

Bivash Majumder, Maxim Khlopov, Saibal Ray, Goutam Manna

Subject: Physical Sciences, Theoretical Physics Keywords: Geodesic structure; Euler-Lagrange equation; K-essence geometry; Vaidya spacetime

Online: 6 November 2023 (16:32:50 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202401.0209.v1

Analysis of Distance and Environmental Impact on UAV Acoustic Detection

Diana Tejera-Berengue, FangFang Zhu-Zhou, Manuel Utrilla-Manso, Roberto Gil-Pita, Manuel Rosa-Zurera

Subject: Engineering, Electrical And Electronic Engineering Keywords: UAV; drone; detection; distance; ROC; machine learning; transfer learning

Online: 3 January 2024 (10:06:56 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202311.0127.v1

Cavitation Strength, Acoustic Nonlinearity and Gas Bubble Distribution in Water

Alexey V. Bulanov, Ekaterina V. Sosedko, Vladimir A. Bulanov, Igor V. Korskov

Subject: Physical Sciences, Fluids And Plasmas Physics Keywords: nonlinear acoustic parameter; cavitation strength; optical breakdown; seawater; bubbles; laser radiation

Online: 2 November 2023 (08:36:02 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201809.0160.v1

Acoustic Properties of Composite Synthesized from Activated Zeolite and Fibre

Hidjan Hidjan, Sutanto Sutanto, Nanang Rohadi

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: Sound Absorption Coefficient; Noise; Activated Zeolite; Banana Stem Fibre; Acoustical material

Online: 10 September 2018 (09:32:23 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1398.v1

Practical but Inaccurate? A-mode Ultrasound and Bioelectrical Impedance Underestimate Body Fat Percentage Compared to Dual-Energy X-ray Absorptiometry in College Men

Markus Filardi Moura Olinto, Victor César Dias Lins, Gabriel Carvalho Rocha, Marco Aurélio Araújo Dourado, Maurilio Tiradentes Dutra

Subject: Public Health And Healthcare, Physical Therapy, Sports Therapy And Rehabilitation Keywords: body fat; bioelectrical impedance; ultrasound; dual energy X-ray absortiometry

Online: 20 June 2024 (11:10:28 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.0525.v1

Zebra_K, a Kinematic Analysis Automated Platform for Assessing Sensitivity, Habituation and Prepulse Inhibition of the Acoustic Startle Response in Adult Zebrafish

Marija Stevanovic, Niki Tagkalidou, Cristiana Roberta Multisanti, Sergi Pujol, Ouwais Aljabasini, Eva Prats, Caterina Faggio, Josep M. Porta, Demetrio Raldúa

Subject: Biology And Life Sciences, Neuroscience And Neurology Keywords: acoustic startle response; neuroplasticity; habituation; prepulse inhibition; sensorimotor gating; adult zebrafish; kinematic analysis platform

Online: 6 September 2024 (12:09:30 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Search Results

38218 articles found