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Journal articles on the topic 'PV-curvature'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Appelbaum, Joseph, and Avi Aronescu. "Distribution of Solar Radiation on Greenhouse Convex Rooftop." Sustainability 12, no. 17 (2020): 7197. http://dx.doi.org/10.3390/su12177197.

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Photovoltaic greenhouses became popular in many countries for growing crops and, at the same time, generating electricity mainly for own usage to control the air temperature inside the greenhouse. Solar radiation is essential for their photosynthesis process for crop growing, however, high levels of solar radiation may adversely affect the crop quality. Therefore, a balance between the need for sufficient solar radiation for plant grows and the need for electricity is important to maintain. Many greenhouses are built with curved rooftops of convex shapes and flat-plate photovoltaic (PV) module

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Badi, Nacer, Azemtsop Manfo Theodore, Saleh A. Alghamdi, et al. "Thermal effect on curved photovoltaic panels: Model validation and application in the Tabuk region." PLOS ONE 17, no. 11 (2022): e0275467. http://dx.doi.org/10.1371/journal.pone.0275467.

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This paper aimed to investigate the temperature effect on photovoltaic (PV) cell parameters. The PV cell parameters such as series and parallel resistances, diode ideality factor, and diode saturation current, are not considered in the reported stepwise modeling. The present work aims to improve available models used in the modeling and simulation of PV modules to support the researcher and power project developer. All the required temperature-dependent parameters are determined to model the simulated PV module with high accuracy using Simulink/MATLAB software. To validate the method, a 36-cel

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Molina-Tamayo, Santiago, Andrés Yesid Moreno, Felipe Mendoza, Gabriel Espitia Mesa, and Gilberto Osorio- Gómez. "Energy analysis of PV surfaces in BIPV applications." E3S Web of Conferences 612 (2025): 04002. https://doi.org/10.1051/e3sconf/202561204002.

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This paper studies the power generation performance of flexible solar panels at different radii of curvature for both concave and convex configurations. Its performance is evaluated horizontally and vertically to provide architects and designers with a reference of how power generation is impacted depending on the geometries selected for the design of facades or roofs. The study consisted of two phases, the first comprised a simulation to estimate the amount of energy a surface receives according to its geometry, orientation, location, and simulated period. The second phase corresponds to an e

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Kullampalayam Murugaiyan, Nandhini, Kumar Chandrasekaran, Magdalin Mary Devapitchai, and Tomonobu Senjyu. "Parameter Estimation of Three-Diode Photovoltaic Model Using Reinforced Learning-Based Parrot Optimizer with an Adaptive Secant Method." Sustainability 16, no. 23 (2024): 10603. https://doi.org/10.3390/su162310603.

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In the developing landscape of photovoltaic (PV) technology, accuracy in simulating PV cell behaviour is dominant for enhancing energy conversion efficiency. This study introduces a new approach for parameter estimation in the three-diode PV model, a basis in the representation of PV cell characteristics. The methodology combines a reinforced learning-based parrot optimizer (RLPO) with an adaptive secant method (ASM) to fine-tune the parameters governing the PV model. The RLPO algorithm is inspired by the mimetic ability of parrots, i.e., foraging, staying, communicating, and fear noticed in t

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Liu, Guohao, Yonghong Deng, and Zhibin Li. "An Ultra-Precision Smoothing Polishing Model for Optical Surface Fabrication with Morphology Gradient Awareness." Micromachines 16, no. 7 (2025): 734. https://doi.org/10.3390/mi16070734.

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To improve the surface morphology quality of ultra-precision optical components, particularly in the suppression of mid-spatial frequency (MSF) errors, this paper proposes a morphology gradient-aware spatiotemporal coupled smoothing model based on convolutional material removal. By introducing the Laplacian curvature into the surface evolution framework, a curvature-sensitive “peak-priority” mechanism is established to dynamically guide the local dwell time. A nonlinear spatiotemporal coupling equation is constructed, in which the dwell time is adaptively modulated by surface gradient magnitud

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Aristya, Vina Eka, and Intan Gilang Cempaka. "KARAKTERISASI ENAM VARIETAS BUNCIS (Phaseolus vulgaris L.) BERDASARKAN PANDUAN PENGUJIAN INDIVIDUAL." Agric 25, no. 1 (2016): 34. http://dx.doi.org/10.24246/agric.2013.v25.i1.p34-41.

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<p>Beans (Phaseolus vulgaris L.) is a plant that has the potential for mainstream consumers, have a large enough market opportunity and a source of vegetable protein. “Perancis” varieties are local Central Java bean varieties are widely grown in the Bandungan area. “Perancis” varieties not currently provide enough characters clear and complete. Test objectives were (1) to characterize the “Perancis” varieties in order to have a complete character information varieties and (2) to determine distinctness, uniformity and stability of the “Perancis” varieties compared with varieties Gypsie, S

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Xu, Shunhai, Chunxiao Zhao, Dian He, Nan Xu, Bin Zhang, and Guofang Gong. "Research on Bearing Mechanism of Spherical Valve Pairs of Axial Piston Pumps." Actuators 13, no. 4 (2024): 147. http://dx.doi.org/10.3390/act13040147.

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The hydraulic system drives the cutter head mechanism to realize the excavation of large tunnel boring equipment, which puts forward the technical requirements of high pressure and large flow to the pump source. The traditional small displacement axial piston pump uses a planar valve plate. However, under high flow and heavy load conditions, the planar valve plate configuration is prone to uneven wear due to the high-pressure and -velocity (PV) value and pressure shock, which ultimately affects the reliability of the system. A simulation analysis of the load-bearing characteristics of the sphe

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Song, Na, Xitong Xu, Yongxiao Zheng, Jikui Miao, and Hongwen Yu. "Heat Transfer Analysis of Ventilated Photovoltaic Wall Panels with Curved Ribs for Different Parametric Cavity Structures." Buildings 15, no. 7 (2025): 1184. https://doi.org/10.3390/buildings15071184.

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Photovoltaic (PV) wall panels are an integral part of Building-Integrated Photovoltaics (BIPV) and have great potential for development. However, inadequate heat dissipation can reduce power generation efficiency. To reduce the temperature of photovoltaic wall panels and improve the photovoltaic conversion efficiency, this paper constructs a computational fluid dynamics (CFD) numerical model of ventilated photovoltaic wall panels and verifies it, then simulates and analyzes the effects of three cavity structure forms on the thermal performance of photovoltaic wall panels and optimizes the dime

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Milošević, Vuk, Janusz Marchwiński, and Elena Lucchi. "Strain Analysis of Membrane Structures for Photovoltaic Integration in Built Environment." Sustainability 17, no. 3 (2025): 1041. https://doi.org/10.3390/su17031041.

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The integration of photovoltaic (PV) systems into tensioned membrane structures presents a significant advancement for sustainable applications in the built environment. However, a critical technical challenge remains in the substantial strains induced by external loads, which can compromise both PV efficiency and the structural integrity of the membrane. Current design methodologies prioritize stress, deflection, and ponding analysis of tensioned membranes. Strain behavior of whole structures, a key factor for ensuring long-term performance and compatibility of PV-integrated membranes, has be

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OPREA, Adrian, and Teodor MARUȘCA. "CONTRIBUTION TO THE ASSESSMENT OF MOUNTAIN GRASSLANDS PRODUCTIVITY FROM RÂMNICU SĂRAT RIVER BASIN." Annals of the Academy of Romanian Scientists Series on Agriculture, Silviculture and Veterinary Medicine 11, no. 1 (2022): 50–61. http://dx.doi.org/10.56082/annalsarsciagr.2022.1.50.

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The aim of this study is to assess the grasslands of the Râmnicu Sărat river basin, lying in Buzău and Vrancea counties, to the Curvature Carpathians, in terms of forage species, as well as to determine their productivity, pastoral value (PV), green fodder mass (GM) production and the optimal load of herbivores per hectare (Large Cattle Units). The permanent grasslands of Râmnicu Sărat river basin are spread up to 1340 m altitude above sea level, on flat lands and aspects, up to 30 degrees slopes, where, on average 85 species of plant species are found within a single plant community. The vege

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Durland, Theodore S., Roger M. Samelson, Dudley B. Chelton, and Roland A. de Szoeke. "Modification of Long Equatorial Rossby Wave Phase Speeds by Zonal Currents." Journal of Physical Oceanography 41, no. 6 (2011): 1077–101. http://dx.doi.org/10.1175/2011jpo4503.1.

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Abstract Previously unaddressed aspects of how equatorial currents affect long Rossby wave phase speeds are investigated using solutions of the shallow-water equations linearized about quasi-realistic currents. Modification of the background potential vorticity (PV) gradient by curvature in the narrow equatorial currents is shown to play a role comparable to the Doppler shift emphasized by previous authors. The important variables are the meridional projections of mean-current features onto relevant aspects of the wave field. As previously shown, Doppler shifting of long Rossby waves is determ

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Zhang, Fei Hu, Xing Bin Yu, Yong Zhang, and Yong Yong Lin. "Polyline Dwell Time Algorithm for Every Type of Tool Path for Ultrasonic-Magnetorheological Combined Finishing." Advanced Materials Research 126-128 (August 2010): 435–40. http://dx.doi.org/10.4028/www.scientific.net/amr.126-128.435.

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Ultrasonic- magnetorheological combined finishing (UMC) is a new technique for the ultraprecision machining of aspheric surfaces, especially for high quality workpieces with small curvature radius concave surfaces. According to the characteristics of UMC finishing, material removal model has been developed. Several types of tool path planning algorithm have been discussed. Two kinds of polyline dwell time algorithm are presented. Polyline Dwell time algorithm based on two-dimensional discrete convolution is a new dwell time algorithm, and the dwell time on the endpoints which compose the tool

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Vijayakumar, S., Duminda S. Ranasinghe, and David M. Wilmouth. "Kinetics of the Reactions of Ozone with Halogen Atoms in the Stratosphere." Atmosphere 12, no. 8 (2021): 1053. http://dx.doi.org/10.3390/atmos12081053.

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It is well established that reaction cycles involving inorganic halogens contribute to the depletion of ozone in the atmosphere. Here, the kinetics of O3 with halogen atoms (Cl, Br, and I) were investigated between 180 and 400 K, expanding the temperature range relative to prior studies. Canonical variational transition state theory including small curvature tunneling correction (CVT/SCT) were considered, following the construction of the potential energy surfaces. MRCI + Q/aug-ano-pVTZ//MP2/aug-cc-pV(T + d)Z and MRCI + Q/aug-ano-RCC-VTZP//MP2/aug-cc-pV(T + d)Z levels of theory were used to ca

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Jin, Zhehui, and Abbas Firoozabadi. "Thermodynamic Modeling of Phase Behavior in Shale Media." SPE Journal 21, no. 01 (2016): 190–207. http://dx.doi.org/10.2118/176015-pa.

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Summary In conventional permeable media, once pore volume (PV) is known, the amount of fluid-in-place can be estimated. This is because the fluid is locally homogeneous, pores are generally larger than 100 nm, and surface adsorption is negligible. In shale media, in addition to PV, knowledge of pore-size distribution, total organic content, and chemistry of the rock is required. Fluid molecules in shale media can be found in three different states: (1) free molecules in the pores, (2) adsorbed molecules on the pore surface, and (3) dissolved molecules in the organic matter. Of the three, the f

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Heitmann, Katharina, Michael Sprenger, Hanin Binder, Heini Wernli, and Hanna Joos. "Warm conveyor belt characteristics and impacts along the life cycle of extratropical cyclones: case studies and climatological analysis based on ERA5." Weather and Climate Dynamics 5, no. 2 (2024): 537–57. http://dx.doi.org/10.5194/wcd-5-537-2024.

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Abstract. This study presents a systematic investigation of the characteristics and meteorological impacts of warm conveyor belts (WCBs). For this purpose, we compile a new WCB climatology (1980–2022) of trajectories calculated with the most recent reanalysis dataset ERA5 from the European Centre for Medium-Range Weather Forecasts (ECMWF). Based on this new climatology, two-dimensional masks are defined that represent the inflow, ascent, and outflow locations of WCBs. These masks are then used to objectively quantify the key characteristics (intensity, ascent rate, and ascent curvature) and me

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Sivaraj, Santhosh, Rajasekar Rathanasamy, Gobinath Velu Kaliyannan, et al. "A Comprehensive Review on Current Performance, Challenges and Progress in Thin-Film Solar Cells." Energies 15, no. 22 (2022): 8688. http://dx.doi.org/10.3390/en15228688.

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Due to the recent surge in silicon demand for solar modules, thin-film photovoltaic (PV) modules have a potential to penetrate the market in significant numbers. As an alternate candidate, thin film technologies in PVs have the ability to achieve better performance. The competing thin-film PV technologies have the flexibility to adapt to any sort of curvature compared to rigid solar cells (SCs). Due to the peculiar characteristics of newer solar materials, stability issues, reflection losses, advancements in electrode materials and dopant materials with a photoactive layer are current challeng

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Kitayama, Takao, Daisuke Tonaru, Hiroki Matsumura, Junichi Uchikoshi, Yasuo Higashi, and Katsuyosi Endo. "Development of a High-Speed Nanoprofiler Using Normal Vector Tracing." Key Engineering Materials 516 (June 2012): 606–11. http://dx.doi.org/10.4028/www.scientific.net/kem.516.606.

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A new high-speed nanoprofiler was developed in this study. This profiler measures normal vectors and their coordinates on the surface of a specimen. Each normal vector is determined by making the incident light path and the reflected light path coincident using five-axis simultaneously controlled stages. From the acquired normal vectors and their coordinates, the three-dimensional shape is calculated by a reconstruction algorithm. In this study, a concave spherical mirror with a 400 mm radius of curvature was measured. As a result, a peak of 30 nm PV was observed at the centre of the mirror. M

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Yin, Guofu, Huiqin Bao, Yulong Zhao, et al. "Design, Fabrication, and Characterization of a Laser-Controlled Explosion-Initiating Device with Integrated Safe-and-Arm, EMP-Resistant, and Fast-Acting Technology Based on Photovoltaic Power Converter." Micromachines 13, no. 5 (2022): 728. http://dx.doi.org/10.3390/mi13050728.

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To augment the intelligence and safety of a rocket or ammunition engine start, an intelligent initiation system needs to be included in the data link. A laser-controlled intelligent initiation system with inherent safety and a laser-controlled explosion-initiating device (LCEID) incorporating electromagnetic pulse (EMP) resistant, safe-and-arms fast-acting modular device based on photovoltaic power converter technology is designed and fabricated in this work. LCEID is an integrated multi-function module consisting of the optical beam expander, GaAs photovoltaic (PV) array, safe-and-arms integr

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Rahimi, Roslina Aida, Saifudin Hafiz Yahaya, and Firat Es. "Design and development of flexible curved shaped solar photovoltaic panel: A conceptual framework." Multidisciplinary Science Journal 7, no. 12 (2025): 2025596. https://doi.org/10.31893/multiscience.2025596.

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This paper presents a comprehensive investigation into the potential of flexible curved solar photovoltaic (PV) panels, emphasizing their ability to enhance solar energy capture while integrating aesthetically into various architectural contexts. Traditional flat solar panel systems, although efficient, often face limitations regarding spatial utilization and their visual impact on urban environments. This study aims to address these challenges by developing a structured framework for the design and implementation of flexible C-shaped and S-shaped solar PV panels.Utilizing cubic Bézier curves,

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Малышев, И. В., М. С. Михайленко, А. Е. Пестов, М. Н. Торопов, А. К. Чернышев та Н. И. Чхало. "Внеосевой асферический коллектор для экстремальной ультрафиолетовой литографии и мягкой рентгеновской микроскопии". Журнал технической физики 93, № 7 (2023): 963. http://dx.doi.org/10.21883/jtf.2023.07.55754.99-23.

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By the method of ion-beam shape correction, a small-sized ion beam formed a non–axisymmetric aspherical profile of the collector surface for an extreme ultraviolet radiation source TEUS-S100 with a numerical aperture of NA= 0.25, PV on the surface is 36.3 microns, the surface shape accuracy by standard deviation is 0.074 microns, which allowed to obtain a focusing spot with a width of 300 microns at half-height. To solve the problem, the technological ion source KLAN-53M was upgraded – the flat ion-optical system was replaced with a focusing one. The ion-optical system consisting of a pair of

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Zhang, Fei Hu, Xing Bin Yu, and Yong Zhang. "Analysis of Tangential Position Error or Removal Function Error in Ultrasonic-Magnetorheological Combined Finishing." Key Engineering Materials 516 (June 2012): 390–95. http://dx.doi.org/10.4028/www.scientific.net/kem.516.390.

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Ultrasonic-magnetorheological combined finishing (UMCF) is a new technique for the ultra precision machining of aspheric surfaces, especially for high quality work pieces with small curvature radius concave surfaces. The goal with UMCF is to minimize surface figure errors by optimizing the dwell time and tool path, and the current approach typically results in low amplitude form errors. However, discrepancies exist between the predicted and observed form errors. The major sources of such errors are machine axes positioning errors and unpredicted variations of the removal function. Errors that

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Zurita-Gotor, Pablo. "The Relation between Baroclinic Adjustment and Turbulent Diffusion in the Two-Layer Model." Journal of the Atmospheric Sciences 64, no. 4 (2007): 1284–300. http://dx.doi.org/10.1175/jas3886.1.

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Abstract Baroclinic adjustment and turbulent diffusion are two popular paradigms used to describe the eddy–mean flow closure in the two-layer model, with very different implications for the criticality of the system. Baroclinic adjustment postulates the existence of preferred equilibrium states, while the turbulent diffusion framework predicts smooth variations of the mean state with the forcing. This study investigates the relevance of each paradigm over a wide range of the parameter space, including very strong changes in the diabatic forcing. The results confirm the weak sensitivity of the

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Waller, Rebekah, Murat Kacira, Esther Magadley, Meir Teitel, and Ibrahim Yehia. "Evaluating the Performance of Flexible, Semi-Transparent Large-Area Organic Photovoltaic Arrays Deployed on a Greenhouse." AgriEngineering 4, no. 4 (2022): 969–92. http://dx.doi.org/10.3390/agriengineering4040062.

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Agricultural greenhouses have been identified as a niche application for organic photovoltaic (OPV) integration, leveraging key performance characteristics of OPV technology, including semi-transparency, light weight, and mechanical flexibility. For optimal electrical design and performance assessment of greenhouse-integrated OPV systems, knowledge of the solar irradiance incident on OPV module surfaces is essential. Many greenhouse designs feature roof curvature. For flexible OPV modules deployed on curved greenhouse roofs, this results in a non-homogenous distribution of solar radiation acro

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Magkouris, Alexandros, Kostas Belibassakis, and Eugen Rusu. "Hydrodynamic Analysis of Twin-Hull Structures Supporting Floating PV Systems in Offshore and Coastal Regions." Energies 14, no. 18 (2021): 5979. http://dx.doi.org/10.3390/en14185979.

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In this paper, a novel model based on the boundary element method (BEM) is presented for the hydrodynamic analysis of floating twin-hull structures carrying photovoltaic panels, supporting the study of wave responses and their effects on power performance in variable bathymetry regions. The analysis is restricted to two spatial dimensions for simplicity. The method is free of any mild-slope assumptions. A boundary integral representation is applied for the near field in the vicinity of the floating body, which involved simple (Rankine) sources, while the far field is modeled using complete (no

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ARABIEH, MASOUD, and MANSOUR ZAHEDI. "DUAL-LEVEL DIRECT DYNAMICS STUDIES ON THE HYDROGEN ABSTRACTION REACTION OF CF3CHFCF3 (HFC-227ea) WITH Cl ATOM." Journal of Theoretical and Computational Chemistry 12, no. 02 (2013): 1250119. http://dx.doi.org/10.1142/s0219633612501192.

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The hydrogen abstraction reaction of CF3CHFCF3 (HFC-227ea) by Cl atom is studied theoretically over a temperature range of 50–2000 K. The reaction path information such as geometries, gradients, etc. are initially obtained at the BB1K/6-31+G (d,p) level. In order to improve the energies, high level single point energy (SPE) calculations are carried out at BB1K/MG3S on BB1K/6-31+G(d,p) geometries. The rate coefficients are obtained by dual-level direct dynamics approach with the interpolated SPE method at BB1K/MG3S//BB1K/6-31+G(d,p) level. Aforementioned rate coefficients are calculated based o

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Yuan, Zheng, Yi Fan Dai, Xu Hui Xie, and Lin Zhou. "Ion Beam Figuring System for Ultra-Precise Optics." Key Engineering Materials 516 (June 2012): 19–24. http://dx.doi.org/10.4028/www.scientific.net/kem.516.19.

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Ion beam figuring (IBF) is a novel technology for Ultra-precise optics. Material is removed from optic surface in atomic or molecular form by physical sputtering. Due to non-contact between the tool and the work piece, the problems involved in the conventional process are avoided, such as edge-effect and tool-wear. The ion beam figuring process is of high determinacy and high efficiency. All these properties make ion beam figuring one of the promising methods for producing mirrors of high precision with nm-rms accuracy. In this article, a new ion beam figuring system which contains doubled vac

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Marchwiński, Janusz, Vuk Milošević, Anna Stefańska, and Elena Lucchi. "Irradiation Analysis of Tensile Membrane Structures for Building-Integrated Photovoltaics." Energies 16, no. 16 (2023): 5945. http://dx.doi.org/10.3390/en16165945.

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A dynamic development in building-integrated photovoltaics (BIPVs) has been observed in recent years. One of the manifestations of this trend is the integration of photovoltaic cells with tensile membrane structures, including canopies. Such solutions bring mutual benefits—the roofs provide a potentially large area for the application of photovoltaic cells while contributing to the improvement of the energy efficiency of the building. However, what is lacking is thorough research on the most favourable photovoltaic cell exposure within these roofs. This paper investigates the optimal position

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Giri, Binod Raj, Krishna Prasad Shrestha, Tam V. T. Mai, et al. "A Theoretical Study of NH2 Radical Reactions with Propane and Its Kinetic Implications in NH3-Propane Blends’ Oxidation." Energies 16, no. 16 (2023): 5943. http://dx.doi.org/10.3390/en16165943.

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The reaction of NH2 radicals with C3H8 is crucial for understanding the combustion behavior of NH3/C3H8 blends. In this study, we investigated the temperature dependence of the rate coefficients for the hydrogen abstraction reactions of C3H8 by NH2 radicals using high-level theoretical approaches. The potential energy surface was constructed at the CCSD(T)/cc-pV(T, Q)//M06-2X/aug-cc-pVTZ level of theory, and the rate coefficients were computed using conventional transition state theory, incorporating the corrections for quantum tunneling and hindered internal rotors (HIR). The computed rate co

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Zhang, Jiarong, Han Wang, Xiangyou Zhu, et al. "Surface Quality Control Strategy of Aspherical Mold Based on Screw Feed Polishing of Small Polishing Tool." Materials 15, no. 14 (2022): 4848. http://dx.doi.org/10.3390/ma15144848.

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For small aspherical molds, it is difficult for the existing polishing method to take into account the correction of the surface error and the control of the uniformity of the surface roughness (SR) distribution, because the polishing tool is always larger than the small mold. Therefore, we used viscoelastic polyester fiber cloth to wrap the small steel ball as a polishing tool to adapt to the surface shape change of the aspherical mold, and designed a semi-flexible small polishing disc tool with microstructure, which can better adapt to the curvature change of aspherical surface and obtain be

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Bansode, Pradnya Vilas, Seema Dhananjay Pathak, Shraddha Pradeep Gite, Jaishri sanjay Pagare, Manthara Baburao Wavadhane, and Shrish Bhimrao Khedgikar. "Cone Beam Computed Tomography: A New Boon and a Ray of Hope to the Endodontist-A Series of Cases." International Journal of Prosthodontics and Restorative Dentistry 5, no. 4 (2015): 101–9. http://dx.doi.org/10.5005/jp-journals-10019-1139.

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ABSTRACT Aim This article aims to provide comprehensive information related to the cone beam computed tomography (CBCT) as a diagnostic aid and its potential applications in dentistry. Background A study was done on 10 different patients with different findings, such as Radix entomolaris, calcifications, vertical root fracture, internal resorption, cystic lesion, perforation, radicular cyst, preparation for endo surgery. These all findings could not be diagnosed by two-dimensional (2D) imaging which were diagnosed with the help of CBCT. Review results Cone beam computed tomography is a revolut

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Li, Kewen, and Roland N. Horne. "An Experimental and Analytical Study of Steam/Water Capillary Pressure." SPE Reservoir Evaluation & Engineering 4, no. 06 (2001): 477–82. http://dx.doi.org/10.2118/75294-pa.

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Summary Significant mass transfer between the steam and water phases makes it difficult to measure steam/water capillary pressure using routine methods. Because of the difficulties, few experimental data are available. A formula was derived on the basis of the Kelvin equation to calculate steam/water capillary pressure. The water-phase temperatures and pressures measured with a steady-state flow method were used to perform the calculations. The preliminary results of both drainage and imbibition steam/water capillary pressure were obtained. It was confirmed that the lowering of vapor pressure

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Fu, Xiu Hua, Yang Liu, and Zong He Jia. "Analysis of a New Processing Method for Small Curvature Aaspheric." Advanced Materials Research 1089 (January 2015): 309–14. http://dx.doi.org/10.4028/www.scientific.net/amr.1089.309.

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For the aspheric processing is complex , time consuming and difficult to guarantte the eccentricity ,this paper introduce a new method of aspheric processing --repairing and polishing methed and describe the principle . Best fit radius, removal function were computed by mathematical model method and the respective performance curves were given by simulation. This methed has the particular advantage of shortening the working time ,reducing the eccentric amount of the element and improving the processing efficiency. Through this processing method, do a series of processing experiments on the sma

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Aardema, Jorie, Zak Whichard, Ted Strom, David Rawlings, and Seth J. Corey. "Loss of the WASP-Interacting Protein, CIP4, Results In Murine Thrombocytopenia: Insights Into the Pathophysiology of WASP-Related Thrombocytopenia." Blood 116, no. 21 (2010): 382. http://dx.doi.org/10.1182/blood.v116.21.382.382.

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Abstract Abstract 382 Wiskott-Aldrich Syndrome (WAS) is an X-linked disorder associated with thrombocytopenia and is due to loss of function mutations in the Wiskott-Aldrich Syndrome Protein (WASP) gene. WASP serves to trigger actin nucleation upon its binding to activated form of Cdc42, phosphorylation by Src kinases, and membrane phospholipid. Loss of function mutations in WASP results in thrombocytopenia and small platelets, but the precise mechanism remains elusive. Using the Src kinase Lyn as bait in yeast two-hybrid screen, we isolated Cdc42 interaction protein 4 (CIP4). CIP4 is a member

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Alageb, Eyhaa, Abbas Abdullah, Asim Alsadig Satti, and Salma Amin Elsayed. "Assessment of Mesial Canals Morphology of Mandibular First Molars Using CBCT: An In-vitro Study." Brazilian Dental Science 23, no. 3 (2020). http://dx.doi.org/10.14295/bds.2020.v23i3.1907.

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Objective: The current study aimed to investigate the relationship between canal configuration, distance between mesiobuccal (MB) and mesiolingual (ML) orifices and the degree of canals curvature in the mesial root of permanent mandibular first molars in a sample of Sudanese population using cone-beam computed tomography (CBCT). Material and Methods: A total of 143 extracted mandibular first molars were processed and scanned with CBCT to determine the configuration of the mesial root canals according to the Vertucci classification. The interorificial distance and the degree of canal curvature

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Abdollahi, Nasrin, and Masoud Rahimi. "Using a Novel Phase Change Material-Based Cooling Tower for a Photovoltaic Module Cooling." Journal of Solar Energy Engineering 142, no. 2 (2019). http://dx.doi.org/10.1115/1.4044890.

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Abstract This paper presents an experimental investigation on a hybrid solar system, including a water-based photovoltaic (PV) solar module and a phase change material (PCM)-based cooling tower, for cooling of the module. Elimination of heat from the PV module was performed by the use of water in the back of the panel. The PCM-based cooling tower was used as a postcooling system. A composite oil consisting of 82 wt% coconut oil and 18 wt% sunflower oil has been used as a novel phase change material in the cooling tower. The helical tubes of the cooling tower were fabricated in two different cu

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Buckingham, Christian E., Jonathan Gula, and Xavier Carton. "The role of curvature in modifying frontal instabilities, part 1." Journal of Physical Oceanography, November 18, 2020. http://dx.doi.org/10.1175/jpo-d-19-0265.1.

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AbstractIn this study, we examine the role of curvature in modifying frontal stability. We first evaluate the classical criterion that the Coriolis parameter, f, multiplied by the Ertel potential vorticity (PV), q, is positive for stable flow and that instability is possible when this quantity is negative. The first portion of this statement can be deduced from Ertel’s PV theorem, assuming an initially positive fq. Moreover, the full statement is implicit in the governing equation for the mean flow, as the discriminant, fq, changes sign. However, for curved fronts in cyclo-geostrophic or gradi

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Feng, Jia-Xi, Fengge Zhang, and Xian Gao. "Scalar induced gravitational waves in chiral scalar–tensor theory of gravity." European Physical Journal C 84, no. 7 (2024). http://dx.doi.org/10.1140/epjc/s10052-024-13097-7.

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AbstractWe study the scalar induced gravitational waves (SIGWs) from a chiral scalar–tensor theory of gravity. The parity-violating (PV) Lagrangian contains the Chern–Simons (CS) term and PV scalar–tensor terms, which are built of the quadratic Riemann tensor term and first-order derivatives of a scalar field. We consider SIGWs in two cases, in which the semi-analytic expression to calculate SIGWs can be obtained. Then, we calculate the fractional energy density of SIGWs with a monochromatic power spectrum for the curvature perturbation. We find that the SIGWs in chiral scalar–tensor gravity b

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Sovetkin, Evgenii, Michael Gordon, Neel Patel, et al. "Nonuniformity of Irradiation Distribution on Vehicles' Bodies." Progress in Photovoltaics: Research and Applications, December 12, 2024. https://doi.org/10.1002/pip.3876.

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ABSTRACTNonuniformity of irradiation in photovoltaic (PV) modules causes a current mismatch in the cells, which leads to energy losses. In the context of vehicle‐integrated PV (VIPV), the nonuniformity is typically studied for the self‐shading effect caused by the curvature of modules. This study uncovers the impact of topography on the distribution of sunlight on vehicle surfaces, focusing on two distinct scenarios: the flat‐surface cargo area of a small delivery truck and the entire body of a commercial passenger vehicle. We employ a commuter pattern driving profile in Germany and a broader

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Emmerson, Parker Yaohushuason. "Geometry of Phenomenological Velocity: Energy Numbers, Curvature and Fukaya-Type Categories." May 27, 2025. https://doi.org/10.5281/zenodo.15523017.

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Thank you, Yaohushua for letting me continue to distribute these mathematical gesturing forms so interesting. The paper constructs an algebraic–geometric framework around the “phenomenological ve-locity” expression v = pN/D that arose in previous informal work. We introduce (i) theenergy-number field E, (ii) a non-commutative velocity-string algebra V, (iii) a curvature scalarKPV defined from a “PV–Hessian”, and (iv) a curved A∞ category Fukv (M ) obtained from anordinary Fukaya category by multiplication with v. Basic structural results are proved; se

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Kim, Katherine A., F. Selin Bagci, and Kristen L. Dorsey. "Design considerations for photovoltaic energy harvesting in wearable devices." Scientific Reports 12, no. 1 (2022). http://dx.doi.org/10.1038/s41598-022-22232-x.

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AbstractWearable technology is emerging as a solution for various bio-mechanic and health-metric applications. Solar photovoltaic energy is a viable supplemental power source that can reduce battery size requirements in wearables. This study outlines the considerations for a wearable sleeve device and its associated power converter system using commercially-available flexible photovoltaic panels located on the forearm. Investigation of the effects of curvature shows that while curvature of the panel around a forearm does reduce output power, the angle relative to the light source has a more pr

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Zhu, Xiaoxue, Lirong Qiu, Weiqian Zhao, Yuhan Liu, Yuan Fu, and Yun Wang. "B-spline adaptive sampling method for freeform surface measurement using laser differential confocal technology." Measurement Science and Technology, December 12, 2024. https://doi.org/10.1088/1361-6501/ad9e21.

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Abstract A B-spline adaptive sampling (B-SAS) method is proposed for three-dimensional (3D) freeform surface measurements using a laser differential confocal sensor (LDCS). High-precision focusing on optical freeform surfaces was achieved by axial scanning using the LDCS. The B-SAS method, based on the arc length and curvature uniformity, was introduced to enable the adaptive distribution of sampling points on freeform surfaces. Experiments show that the B-SAS method improves the repeatability accuracy of the peak-to-valley (PV) (3σ) for freeform surfaces by 27% compared to the uniform samplin

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Asaeikheybari, Golnoush, Majd El-Harasis, John Barnard, et al. "Abstract 18852: Machine Learning to Predict Atrial Fibrillation Recurrence Using Pulmonary Vein Morphology." Circulation 148, Suppl_1 (2023). http://dx.doi.org/10.1161/circ.148.suppl_1.18852.

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Introduction: Predicting risk of recurrence and sites of recurrence after atrial fibrillation (AF) ablation help direct ablation strategies. While the left atrium (LA) has been implicated as a possible site of AF recurrence leading to ablation directed toward LA substrates, reconnection of pulmonary veins (PVs) has been observed as a mechanism of recurrence on repeat ablations. Hypothesis: Regions of statistical shape differences between AF recurrence (AF+) and non-recurrence patients (AF-) within the PV on a CT scan might be associated with sites of recurrence, that features extracted from th

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Saberi, Atousa, Lawrence J. Pratt, Thomas W. N. Haine, and Karl R. Helfrich. "Using Hydraulic Theory to Monitor Dense Overflows in a Parabolic Channel." Journal of Physical Oceanography, December 2, 2022. http://dx.doi.org/10.1175/jpo-d-22-0103.1.

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Abstract Deep ocean passages are advantageous sites for long term monitoring of deep transport and other physical properties relevant to climate. Rotating hydraulic theory provides potential for simplifying monitoring strategy by reducing the number of quantities that need to be measured. However, the applicability of these theories has been limited by idealizations such as restriction to zero or uniform potential vorticity ( pv ) and to channels with rectangular cross sections. Here the relationship between the flow characteristics in a canonical sea-strait and its upstream condition is studi

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Buckingham, Christian E., Jonathan Gula, and Xavier Carton. "The role of curvature in modifying frontal instabilities, part 2." Journal of Physical Oceanography, November 18, 2020. http://dx.doi.org/10.1175/jpo-d-20-0258.1.

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AbstractWe continue our study of the role of curvature in modifying frontal stability. In Part 1, we obtained an instability criterion valid for curved fronts and vortices in gradient wind balance (GWB): Φ′ = L′q′ < 0, where L′ and q′ are the non-dimensional absolute angular momentum and Ertel potential vorticity (PV), respectively. In Part 2, we investigate this criterion in a parameter space representative of low-Richardson number fronts and vortices in GWB. An interesting outcome is that, for Richardson numbers near one, anticyclonic flows increase in q′, while cyclonic flows decrease in

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Yamada, Kei, and Takahiro Tanaka. "Parametrized test of parity-violating gravity using GWTC-1 events." Progress of Theoretical and Experimental Physics 2020, no. 9 (2020). http://dx.doi.org/10.1093/ptep/ptaa103.

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Abstract Parity-violating (PV) gravity has recently attracted interest in several aspects. One of them is the axion–graviton coupling to test the axion–dark matter model. Moreover, by extending Chern–Simons (CS) gravity to include derivatives of a scalar field up to the second order, a more general class of PV gravity theory, which we call the CNCL model, has been proposed [M. Crisostomi et al., Phys. Rev. D, 97, 044034 (2018)]. The model can be further extended by including even higher derivatives of the scalar field and/or higher curvature terms. In this paper, we discuss the effect of parit

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Hodges, Deidra Ranel, Vasilios Palekis, Shweta Bhandaru, Kartikay Singh, Don L. Morel, and Lee Stefanakos. "Mechanical Properties and Adhesion of CdTe/CdS Thin Film Solar Cells Deposited on Flexible Foil Substrates." MRS Proceedings 1165 (2009). http://dx.doi.org/10.1557/proc-1165-m02-09.

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AbstractCadmium telluride (CdTe) is a leading thin film photovoltaic (PV) material due to its near ideal band gap of 1.45 eV, its high optical absorption coefficient and availability of various device fabrication methods. Superstrate CdTe solar cells fabricated on glass have to-date exhibited efficiencies of 16.5%. Work on substrate devices has been limited due to difficulties associated with the formation of an ohmic contact with CdTe. Foil substrate curvature, flaking, delamination and adhesion as a result of compressive strain due to the coefficient of thermal expansion (CTE) mismatch betwe

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Piccinini, R. B., L. K. Kubota, M. R. Galvão, and A. A. Emerick. "Application of an Ensemble-Based Method for Pressure-Rate Deconvolution." SPE Journal, June 1, 2025, 1–18. https://doi.org/10.2118/220707-pa.

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Summary Pressure-rate deconvolution is a technique used in well-test analysis to improve the interpretation of late-time reservoir behavior such as compartmentalization, pressure recharge, and pore volume (PV) estimation. However, the application is mostly restricted to single-well cases with low-noise buildup pressure data and accurate flow-rate histories. This limitation arises because the deconvolution solution is nonunique, and noisy pressure data increase the number of possible solutions, errors in the rate history produce erroneous superposition effects, and multiple wells require more c

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Weil, Anne, and Yukimitsu Tomida. "Inner ear of the cimolodontan multituberculate Meniscoessus robustus supports functional interpretation and a novel phylogenetic hypothesis." FASEB Journal 31, S1 (2017). http://dx.doi.org/10.1096/fasebj.31.1_supplement.243.2.

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The Multituberculata are an extinct branch of Mammalia with no living descendants. Among those multituberculate taxa with known crania, a large cavity within the petrosal, interpreted as housing a large vestibule, was initially thought to distinguish multituberculates from other mammals but has subsequently been shown to be limited, and perhaps phylogenetically informative, among the Cimolodonta.We have confirmed, by μCT scanning a nearly complete skull of the Late Cretaceous North American species Meniscoessus robustus (NSM‐PV 20436), that Meniscoessus has a strikingly large vestibular cavity

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Moreno, Michael R., Saurabh Biswas, Lewis D. Harrison, et al. "Development of a Non-Blood Contacting Cardiac Assist and Support Device: An In Vivo Proof of Concept Study." Journal of Medical Devices 5, no. 4 (2011). http://dx.doi.org/10.1115/1.4005281.

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One of the maladaptive changes following a heart attack is an initial decline in pumping capacity, which leads to activation of compensatory mechanisms, and subsequently, a phenomenon known as cardiac or left ventricular remodeling. Evidence suggests that mechanical cues are critical in the progression of congestive heart failure. In order to mediate two important mechanical parameters, cardiac size and cardiac output, we have developed a direct cardiac contact device capable of two actions: (1) adjustable cardiac support to modulate cardiac size and (2) synchronous active assist to modulate c

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Zhang, Li, Bingjun Zheng, Yi Xie, Renquan Ji, Yanbiao Li, and Wenbing Mao. "Control Mechanism of Particle Flow in the Weak Liquid Metal Flow Field on Non-Uniform Curvature Surface Based on Lippmann Model." Frontiers in Materials 9 (April 25, 2022). http://dx.doi.org/10.3389/fmats.2022.895263.

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In order to realize the uniform distribution in the abrasive flow polishing of the titanium alloy workpiece with curved surface, a novel method based on the liquid metal-abrasive flow machining technology is proposed in this study. Based on the SST k-ω model, Preston model and fluid flow particle tracking model, the COMSOL software is employed to study the dynamic characteristics of liquid metal-abrasive flow under different AC electric field conditions, and the two-phase flow field is used to simulate the liquid state, the movement of liquid metal particles on the surface of the workpiece and

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