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Journal articles on the topic 'Varying area duct'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Krpenský, A., M. Bednařík, and J.-P. Groby. "Willis couplings in continuously varying cross-sectional area duct." Journal of the Acoustical Society of America 154, no. 3 (2023): 1660–66. http://dx.doi.org/10.1121/10.0020849.

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Acoustic wave propagation in a one-dimensional periodic and asymmetric duct is studied theoretically and numerically to derive the effective properties. Closed form expressions for these effective properties, including the asymmetric Willis coupling, are derived through truncation of the Peano–Baker series expansion of the matricant (which links the state vectors at the two sides of the unit-cell) and Padé's approximation of the matrix exponential. The results of the first-order and second-order homogenization (with Willis coupling) procedures are compared with the numerical results. The secon

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2

Asima, M., A. E. Amos, and Y. P. Olisa. "COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF ADIABATIC FLUID FLOW IN GRADUALLY CONTRACTING TRANSITION DUCTS." Continental J. Engineering Sciences 10, no. 2 (2015): 21–27. https://doi.org/10.5281/zenodo.2936205.

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Computational fluid dynamics (CFD) was used to simulate fluid flow in ducts of varying diameters. Three Transition ducts of equal inlet areas but different outlet diameters were designed and analyzed. Fluid (water) with inlet velocity of 0.12m/s and temperature of 150 C (288.15K) was passed adiabatically through the first transition duct of inlet diameter 11.28mm and outlet diameter of 3.57mm. The analyses of the flow reveals a change of approximately 0.1K (-273.05) in temperature in the first duct while the other two ducts also have the same amount of temperature change because of the adiabat

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3

Yule, A. J., and M. Damou. "Axisymmetric turbulent jet flows in a duct of varying area." Experimental Thermal and Fluid Science 5, no. 4 (1992): 499–505. http://dx.doi.org/10.1016/0894-1777(92)90036-5.

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4

Kim, Dohaeng, and Wonju Jeon. "Acoustic metaliners for insulating noise in a duct with varying cross-sectional area." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A187. http://dx.doi.org/10.1121/10.0023217.

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We propose a sound-insulating acoustic metaliner for a duct with varying cross-sectional area with consideration of the flow that varies along the direction of flow and is not a fully-developed. The metaliner comprises an array of unit cells based on two different types of Helmholtz resonators and installed on the duct wall to preserve ventilation performance. To consider the effect of flow on the sound insulation performance of the metaliner, we establish an effective impedance model in term of the friction velocity, enabling the consideration for flows that are not fully-developed. The geome

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Tsai, Chih-Hsin, Shuhn-Shyurng Hou, and Ta-Hui Lin. "Spray flames in a one-dimensional duct of varying cross-sectional area." International Journal of Heat and Mass Transfer 48, no. 11 (2005): 2250–59. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2004.12.021.

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6

Xiao, Yongxiong, Huancai Lu, D. Michael McFarland, Lawrence A. Bergman, and Daren Zhou. "Analytical Solutions for Side-branch Impedance Producing Spatial Localization of Acoustic Waves in Ducts with Varying Cross Sections." International Journal of Acoustics and Vibration 26, no. 2 (2021): 132–38. http://dx.doi.org/10.20855/ijav.2021.26.21750.

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Analytical mathematical models and solutions for spatial localization of acoustic waves through an impedance discontinuity produced by an intermediate damped side branch are studied in stationary media in ducts with varying cross sections. Three specific geometries, namely, with polynomial, sinusoidal, and exponential longitudinal variations, are investigated. The sound fields inside the ducts are modeled by Webster's horn equation. Traveling-wave solutions are obtained by appropriate transformations. The side-branch impedances required for spatial localization (confinement) of traveling and s

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Pillai, Minu A., D. D. Ebenezer, and Ezhilarasi Deenadayalan. "Transfer matrix analysis of a duct with gradually varying arbitrary cross-sectional area." Journal of the Acoustical Society of America 146, no. 6 (2019): 4435–45. http://dx.doi.org/10.1121/1.5139412.

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8

Tsai, Chih-Hsin, Shuhn-Shyurng Hou, and Ta-Hui Lin. "A spray flame propagating in a nonadiabatic duct with varying cross-sectional area." Combustion and Flame 144, no. 1-2 (2006): 277–88. http://dx.doi.org/10.1016/j.combustflame.2005.08.006.

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9

Yang, Huanxin, Junjie Shi, Lin Chen, et al. "A Study of the Effects of Stimulants on Resin Yield, Resin Duct and Turpentine Chemical Composition in Pinus kesiya var. langbianensis." Forests 15, no. 5 (2024): 748. http://dx.doi.org/10.3390/f15050748.

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This study presents a comprehensive examination of Pinus kesiya var. langbianensis (Pinus kesiya var. langbianensis), the primary resin-extraction tree species in Yunnan Province, China. In this study, we formulated different concentration gradients of 0.25%, 0.5%, 1%, and 2% of diquat solution as tapping stimulant to test the effect of different concentrations on the resin gain rate of Pinus kesiya, and analyzed the relationship between anatomical structure, major chemical composition of turpentine and resin yield by methods such as wood anatomy and chemical composition analysis of turpentine

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Demir, A. "A Study of Air-Jet Texturing Nozzles: The Effects of Nozzle Configuration on the Air Flow." Journal of Engineering for Industry 112, no. 1 (1990): 97–104. http://dx.doi.org/10.1115/1.2899301.

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A thorough investigation of the existing texturing nozzles will, no doubt, lead to the design of improved nozzles. This paper reports the experimental research carried on the scaled-up versions of the T100 HemaJet with varying geometrical configurations, being the exit shape, situation, and inclination of the inlet holes, and the ratio of the incoming holes area to the nozzle’s main duct area. It has been found that the exit shape has virtually no effect on the airflow whilst other parameters contribute to the formation of the emerging jet which performs the texturing.

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11

Buresti, Guido, and Claudio Casarosa. "The one-dimensional adiabatic flow of equilibrium gas–particle mixtures in variable-area ducts with friction." Journal of Fluid Mechanics 256 (November 1993): 215–42. http://dx.doi.org/10.1017/s0022112093002770.

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A general one-dimensional model for the steady adiabatic motion of gas-particle mixtures in arbitrarily oriented ducts with gradually varying cross-section and wall friction is presented. The particles are assumed to be incompressible and in thermomechanical equilibrium with a perfect gas phase, and the effects of their finite volume and of gravity are also taken into account.The equations of motion are written in a form that allows a theoretical analysis of the behaviour of the solutions to be carried out. In particular, the results of the application to the model of a procedure that permits

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12

Zhang, Zheying, Wei Zhang, and Zuchao Zhu. "Numerical investigation on separated turbulent flow in a three-dimensional U-turn duct with spanwise diverging." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 236, no. 5 (2021): 2268–83. http://dx.doi.org/10.1177/09544062211029320.

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The flow in a U-turn duct with a 180-degree curved section is a typical model of various applications such as the bend and return channel in multi-stage radial turbo-machines. The flow exhibits complex patterns including the separation on the inner wall, highly sheared flow in the curved and downstream sections, and recovery of deficit flow to uniform flow. Most of current researches focus on the simplified models of two-dimensional plane duct or three-dimensional duct with constant cross-section, while in realistic circumstances the duct can be varying in the shape and area of the cross-secti

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13

Tsai, Chih-Hsin, and Ta-Hui Lin. "INFLUENCE OF INERT SPRAYS ON EXTINCTION OF PREMIXED FLAMES PROPAGATING IN A DUCT WITH VARYING CROSS-SECTIONAL AREA." Atomization and Sprays 15, no. 5 (2005): 545–66. http://dx.doi.org/10.1615/atomizspr.v15.i5.40.

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14

Nazarenko, Petr Mihailovich, Аlexsandr Ivanovich Konoplya, Paul Cherepovich Mekailyan, et al. "The Model of Acute Pancreatitis of Different Degree in Experiment." Journal of Experimental and Clinical Surgery 12, no. 4 (2019): 240–47. http://dx.doi.org/10.18499/2070-478x-2019-12-4-240-247.

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Relevance of the topic. Acute pancreatitis (OP) is originally an aseptic inflammation of the pancreas, with possible damage to the surrounding tissues and individual organs, as well as systems, which is the third most common after acute appendicitis and acute cholecystitis in the number of patients. In this regard, an experimental model is needed to further determine the tactics of management and treatment of patients with acute pancreatitis of varying severity. Objective: to develop a universal model of acute pancreatitis with the ability to control the area of pancreatic necrosis thr

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15

Naser, Rabab, Salah Almaliki, Fatimah Zghair, and Ali Ezzy. "<b>Study of morphological and histological properties of the pancreas in crow (<i>Linnaecus corvus</i>) and Iraqi black partridge (<i>Melanoperdix niger</i>)</b>." Open Veterinary Journal 14, no. 10 (2024): 2634. http://dx.doi.org/10.5455/ovj.2024.v14.i10.13.

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Background: The structures of the pancreas in crow (Linnaecus corvus) and Iraqi black partridge (Melanoperdix niger) were the target for histological and morphometric differences in both birds. Aim: To study the comparative histomorphology of the pancreas in two species black partridge and local crow. Methods: Five healthy black partridge and five local crows were used in current study. Results: The anatomically study reveals that the pancreas in both species situated within the coelomic compartment at right side. It composites of four lobes include splenic, ventral, third and dorsal lobe. It

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Samin Enam, Muhammad Noor Afiq Witri Muhammad, and Nor Azwadi Che Sidik. "Numerical Investigation on The Effect of Grille Blockage Ratio on Air Flow Characteristics of Air Vents." CFD Letters 14, no. 10 (2022): 32–41. http://dx.doi.org/10.37934/cfdl.14.10.3241.

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Vents with louvers are an important component in the indoor heating, ventilation, and air conditioning (HVAC) system in providing a degree of freedom to the occupants to direct the air flow and prevent foreign objects from entering or exiting the air ducts. As a result, whether designing air ventilation or any duct design that involves louvers, the influence of louver design cannot be ignored. For vent design, aside from louver angle, blockage ratio is an important factor in air distribution due to its effect on pressure drop and flow distribution to indoor space. The blockage ratio is often d

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17

Pangaribuan, Marcellino, and Firman Hartono. "Analysis on the Influence of Duct Casing Geometry on the Performance of a Ducted Fan." Mesin 30, no. 1 (2024): 39–55. http://dx.doi.org/10.5614/mesin.2024.30.1.3.

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This paper aims to evaluate the influence of an electric ducted fan’s (EDF) geometry on its performance through parameter correlation analysis. Sample data was first built by generating new EDF models with varying duct casing geometries through optimal space-filling (OSF) sampling method. Afterwards, each model was numerically solved with computational fluid dynamics (CFD) analysis to obtain each model’s thrust, required power, and efficiency. It is found that the casing’s inlet lip diameter displays the greatest influence on the EDF’s total thrust, as the inlet diameter determines the casing’

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18

Xiong, Bing, Xiao-qiang Fan, Zhen-guo Wang, and Yuan Tao. "Analysis and modelling of unsteady shock train motions." Journal of Fluid Mechanics 846 (May 4, 2018): 240–62. http://dx.doi.org/10.1017/jfm.2018.209.

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The characteristics and mechanism for unsteady shock train motions were experimentally studied in a constant-area rectangular duct. High-speed Schlieren techniques and high-frequency pressure measurements were utilized in this research. The results show that the shock train undergoes periodical motions in response to downstream periodical excitations. The mechanism for unsteady shock train motions is that the shock train keeps changing its moving speed to change the relative Mach number ahead of shock train to match the varying back-pressure condition. It can be found that the unsteady shock t

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19

Lewallen, Kara Senger, and Richard P. Marini. "Relationship between Flesh Firmness and Ground Color in Peach as Influenced by Light and Canopy Position." Journal of the American Society for Horticultural Science 128, no. 2 (2003): 163–70. http://dx.doi.org/10.21273/jashs.128.2.0163.

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The influence of photosynthetic photon flux (PPF) on peach [Prunus persica (L.) Batsch] fruit quality and the relationship between ground color and flesh firmness was studied by performing three experiments. Fruit with varying ground colors were sampled from different canopy positions with varying PPF. Fruit skin color was measured with a tristimulus colorimeter and values for L* (lightness), chroma (brightness), and hue angle (numerical values for color) were calculated for each fruit. Fruit from the canopy exterior generally were larger, had more surface area colored red, had higher soluble

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20

Lewallen, Kara Senger, and Richard P. Marini. "Relationship between Flesh Firmness and Ground Color in Peach as Influenced by Light and Canopy Position." Journal of the American Society for Horticultural Science 128, no. 2 (2003): 163–70. https://doi.org/10.21273/jashs.128.2.163.

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The influence of photosynthetic photon flux (PPF) on peach [Prunus persica (L.) Batsch] fruit quality and the relationship between ground color and flesh firmness was studied by performing three experiments. Fruit with varying ground colors were sampled from different canopy positions with varying PPF. Fruit skin color was measured with a tristimulus colorimeter and values for L* (lightness), chroma (brightness), and hue angle (numerical values for color) were calculated for each fruit. Fruit from the canopy exterior generally were larger, had more surface area colored red, had higher soluble

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21

Liu, Yang, Jian-Ming Li, Qing Ma, and Ya-Xiong Wang. "Simulation and analysis of a noval thermal management system integrated with heat pipe radiators for 4680 battery module." Thermal Science, no. 00 (2024): 137. http://dx.doi.org/10.2298/tsci240201137l.

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In order to enhance the safety and service life of automotive 4680 cylindrical batteries during high current discharge state, based on theoretical analysis and numerical simulation, a novel air cooling thermal management system that is integrated with finned heat pipe radiators has been developed and studied in this paper. A triangular heat conduction area was developed by leveraging the gaps within an equilateral triangular arrangement of cylindrical batteries to enhancement heat transfer and improve energy density, and heat exchange between finned heat pipes and cold air is facilitated by va

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22

Ghazwani, Hassan Ali, Khairuddin Sanaullah, Vladimir Vladimirovich Sinitsin, and Afrasyab Khan. "Investigations into the Effect of Mixing on Steam–Water Two-Phase Subsonic Cross-Flow Stability." Fluids 8, no. 11 (2023): 286. http://dx.doi.org/10.3390/fluids8110286.

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Theoretical and experimental aspects of the project were conducted to investigate the effect of the mixing of a swirling steam jet into cross-flowing water. It was observed that based on the theoretical adiabatic estimations for the equilibrium temperature of steam–water mixing and by varying Psteam = 1–3 bar, Pwater = 1 bar and RPM = 60–300 around 97% (experimentally compared to the area it has at initial condition) and 85% (CFD study compared to the area it has at initial condition), an increase in the area under the influence of perfect adiabatic mixing was found. A virtual cover over the s

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23

Kamenskikh, A. A., G. Z. Faynburg, M. A. Semin, and A. V. Tatsiy. "Experimental study on forced ventilation in dead-end mine working with various setbacks of the ventilation pipeline from the working face." Gornye nauki i tekhnologii = Mining Science and Technology (Russia) 9, no. 1 (2024): 41–52. http://dx.doi.org/10.17073/2500-0632-2023-08-147.

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The study of airflow patterns at the ends of dead-end mine workings is crucial for optimizing underground mining ventilation systems. Understanding these patterns forms the basis for designing and implementing effective ventilation strategies.Previous studies have shed light on the behavior of the main vortex and the formation of stagnant zones in such environments, but these insights remain fragmented and call for a more systematic exploration to integrate them into a comprehensive theory.This paper presents the results of a thorough field investigation into the forced ventilation behavior in

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24

Sfravara, Felice, Emmanuele Barberi, Giacomo Bongiovanni, Massimiliano Chillemi, and Sebastian Brusca. "Development of a Predictive Model for Evaluation of the Influence of Various Parameters on the Performance of an Oscillating Water Column Device." Sensors 24, no. 11 (2024): 3582. http://dx.doi.org/10.3390/s24113582.

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Oscillating Water Column (OWC) systems harness wave energy using a partially submerged chamber with an underwater opening. The Savonius turbine, a vertical-axis wind turbine, is well-suited for this purpose due to its efficiency at low speeds and self-starting capability, making it an ideal power take-off (PTO) mechanism in OWC systems. This study tested an OWC device with a Savonius turbine in an air duct to evaluate its performance under varying flow directions and loads. An innovative aspect was assessing the influence of power augmenters (PAs) positioned upstream and downstream of the turb

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Minaiev, O. O. "COMPLICATIONS IN SURGICAL TREATMENT OF PATIENTS WITH CHRONIC DACRYOCYSTITIS." Medical Science of Ukraine (MSU) 16, no. 4 (2020): 22–27. http://dx.doi.org/10.32345/2664-4738.4.2020.4.

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Relevance. Effective treatment of chronic dacryocystitis (CD) remains an urgent problem of modern ophthalmology and rhinology. When studying this issue, not enough attention is always paid to complications. Objective – to analyze the existing complications in the surgical treatment of patients with СD. Material and methods. The study group (1st group) consisted of 45 patients with CD, who underwent endonasal endoscopic dacryocystorhinostomy (EEDCR) according to the developed own method, the comparison group (2nd group) included 36 patients who after performing the developed EEDCR a

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Han, Xiaobei, Tianxiang Liu, Yuliang Cai, et al. "Design and Evaluation of an Innovative Thermoelectric-Based Dehumidifier for Greenhouses." Agronomy 15, no. 5 (2025): 1194. https://doi.org/10.3390/agronomy15051194.

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Crops in greenhouses located in cold climates are frequently affected by high relative humidity (RH). This study presents the design, testing, and analysis of a dehumidifier based on thermoelectric cooling. Thermoelectric dehumidifiers (TEDs) are capable of dehumidifying greenhouses in cold regions while recovering heat for indoor air heating. The design of a TED is based on the specific characteristics of thermoelectric coolers (TECs). A TED consists of a cabinet, four heat exchangers, a duct fan, a water pump, and auxiliary components. The TED performance was evaluated in a Chinese solar gre

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Khan, Attaullah, Fangyuan Shen, Lixue Yang, Wei Xing, and Brent Clothier. "Limited Acclimation in Leaf Morphology and Anatomy to Experimental Drought in Temperate Forest Species." Biology 11, no. 8 (2022): 1186. http://dx.doi.org/10.3390/biology11081186.

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Drought is a critical and increasingly common abiotic factor that has impacts on plant structures and functioning and is a challenge for the successful management of forest ecosystems. Here, we test the shifts in leaf morpho-anatomical or hydraulic traits and plant growth above ground caused by drought. A factorial experiment was conducted with two gymnosperms (Larix gmelinii and Pinus koraiensis) and two angiosperms (Fraxinus mandshurica and Tilia amurensis), tree species grown under three varying drought intensities in NE China. Considering all the species studied, the plant height (PH), roo

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Mehta, Y., C. Neal, K. Salari, T. L. Jackson, S. Balachandar, and S. Thakur. "Propagation of a strong shock over a random bed of spherical particles." Journal of Fluid Mechanics 839 (January 25, 2018): 157–97. http://dx.doi.org/10.1017/jfm.2017.909.

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Propagation of a strong incident shock through a bed of particles results in complex wave dynamics such as a reflected shock, a transmitted shock, and highly unsteady flow inside the particle bed. In this paper we present three-dimensional numerical simulations of shock propagation in air over a random bed of particles. We assume the flow is inviscid and governed by the Euler equations of gas dynamics. Simulations are carried out by varying the volume fraction of the particle bed at a fixed shock Mach number. We compute the unsteady inviscid streamwise and transverse drag coefficients as a fun

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Xi, Jinxiang, and Mohamed Talaat. "Nanoparticle Deposition in Rhythmically Moving Acinar Models with Interalveolar Septal Apertures." Nanomaterials 9, no. 8 (2019): 1126. http://dx.doi.org/10.3390/nano9081126.

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Pulmonary delivery of nanomedicines has been extensively studied in recent years because of their enhanced biocompatibility, sustained-release properties, and surface modification capability. The lung as a target also offers many advantages over other routers, such as large surface area, noninvasive, quick therapeutic onset, and avoiding first-pass metabolism. However, nanoparticles smaller than 0.26 µm typically escape phagocytosis and remain in the alveoli for a long time, leading to particle accumulation and invoking tissue responses. It is imperative to understand the behavior and fates of

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UTSUMI, Masahiko. "Sound Transmission in Circular Ducts of Continuously Varying Cross-sectional Area." Transactions of the Japan Society of Mechanical Engineers Series C 64, no. 628 (1998): 4626–31. http://dx.doi.org/10.1299/kikaic.64.4626.

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UTSUMI, M. "SOUND TRANSMISSION IN CIRCULAR DUCTS OF CONTINUOUSLY VARYING CROSS-SECTIONAL AREA." Journal of Sound and Vibration 242, no. 2 (2001): 369–76. http://dx.doi.org/10.1006/jsvi.2000.3331.

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Zhu, Z. C., and Y. Zhang. "Numerical analysis of sound propagation with acoustic shock waves in varying area ducts." Journal of the Acoustical Society of America 86, S1 (1989): S93. http://dx.doi.org/10.1121/1.2027734.

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Yeddula, Saikumar R., and Aimee S. Morgans. "A semi-analytical solution for acoustic wave propagation in varying area ducts with mean flow." Journal of Sound and Vibration 492 (February 2021): 115770. http://dx.doi.org/10.1016/j.jsv.2020.115770.

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Ntoko, Nzumbe-Mesape. "Piecewise generation of surfaces of curved ducts of varying cross-sectional area using patch shifting or overlap." Computers in Industry 6, no. 2 (1985): 99–102. http://dx.doi.org/10.1016/0166-3615(85)90014-4.

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Carnate, Jose. "Botryoid Odontogenic Cyst." Philippine Journal of Otolaryngology Head and Neck Surgery 35, no. 1 (2020): 76–77. http://dx.doi.org/10.32412/pjohns.v35i1.1291.

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A 70-year-old man consulted for a mass of unspecified duration in the anterior area of the mandible. Radiologic information was not provided. An incision biopsy was performed by the dentistry service. The specimen received at the laboratory was labeled “cystic lining” and consisted of two light-gray to dark brown, irregularly shaped tissue fragments measuring 0.3 cm and 0.4 cm in diameters. Histological sections show biloculated cyst wall segments composed of fibrocollagenous tissue lined by an epithelial lining of varying thickness. (Figure 1) The latter consists of a thin layer of non-kerati

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Gupta, V. H. "A note on three-dimensional effects in segmentation approach for analysis of one-dimensional waves in ducts of varying cross-sectional area." Journal of Sound and Vibration 182, no. 2 (1995): 323–27. http://dx.doi.org/10.1006/jsvi.1995.0199.

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Chandra Bose, G., S. Thanigaiarasu, S. Elangovan, and E. Rathakrishnan. "Experimental Investigation of Shape Transition Effects on Isolator Performance." International Journal of Turbo & Jet-Engines 35, no. 4 (2018): 331–38. http://dx.doi.org/10.1515/tjj-2015-0022.

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Abstract Isolator is a critical component in supersonic air breathing engine and it is usually situated between the inlet and the combustor of a dual-mode ramjet/scramjet engine. In the present study, shape transition effects on isolator performance have been studied by carrying out experimental investigations on square, square to circular and square to elliptical transition ducts. The length of the isolator chosen in this study is 180 mm and the cross-sectional area of 900 mm2 is maintained constant along the length for all the ducts. Experiments were carried out for isolator inlet Mach 2, us

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Azis, Yelmida, Cory Dian Alfarisi, Komalasari Komalasari, Khairat Khairat, and Yusnimar Sahan. "Synthesis and Characterization of Hydroxyapatite from Duck Eggshell by Wet Precipitation Process." Journal of Applied Materials and Technology 3, no. 1 (2021): 8–11. http://dx.doi.org/10.31258/jamt.3.1.8-11.

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Hydroxyapatite (HAp, Ca10(PO4)6(OH)2) is the most stable form of calcium phosphate and widely used in various medical applications, mainly in orthopedics and dentistry due to its close similarities with the inorganic mineral component of bone and teeth. This study aims to synthesize hydroxyapatite from duck eggshell using the precipitation method. The duck eggshell was calcined, hydrated (slaking) and underwent carbonation to form Precipitated Calcium Carbonate (PCC). Afterwards, (NH4)2HPO4 was added to produce HAp by varying the molar ratio of Ca/P by 1.67, 1.77 and 1.87 and stirring speed by

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Ayyappath, Ramesh, Michael P. Hoffmann, and Jeffrey Gardner. "Effect of Striped Cucumber Beetle (Coleoptera: Chrysomelidae) Foliar Feeding on Winter Squash Injury and Yield." Journal of Entomological Science 37, no. 3 (2002): 236–43. http://dx.doi.org/10.18474/0749-8004-37.3.236.

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The relationship between leaf feeding injury caused by striped cucumber beetle, Acalymma vittatum (F.), and yield of winter squash, Cucurbita moschata Duch., was examined under field and laboratory conditions. In a field trial in 1998, individually-caged plants were artificially infested with varying numbers of beetles to create a range of injury levels. Treatments consisted of three levels of injury (1 to 25, 26 to 50, and &gt;50%) and uninjured controls, each at the cotyledon-, first-, second-, and third-leaf stages of plant development. Under laboratory conditions, the leaf area consume

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Yoo, Dae-Sung, Byungchul Chun, Kyung-Duk Min, Jun-Sik Lim, Oun-Kyoung Moon, and Kwang-Nyeong Lee. "Elucidating the Local Transmission Dynamics of Highly Pathogenic Avian Influenza H5N6 in the Republic of Korea by Integrating Phylogenetic Information." Pathogens 10, no. 6 (2021): 691. http://dx.doi.org/10.3390/pathogens10060691.

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Highly pathogenic avian influenza (HPAI) virus is one of the most virulent and infectious pathogens of poultry. As a response to HPAI epidemics, veterinary authorities implement preemptive depopulation as a controlling strategy. However, mass culling within a uniform radius of the infection site can result in unnecessary depopulation. Therefore, it is useful to quantify the transmission distance from infected premises (IPs) before determining the optimal area for preemptive depopulation. Accordingly, we analyzed the transmission risk within spatiotemporal clusters of IPs using transmission ker

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Thorn, Hans, Karin G. Stenkula, Margareta Karlsson, et al. "Cell Surface Orifices of Caveolae and Localization of Caveolin to the Necks of Caveolae in Adipocytes." Molecular Biology of the Cell 14, no. 10 (2003): 3967–76. http://dx.doi.org/10.1091/mbc.e03-01-0050.

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Caveolae are noncoated invaginations of the plasma membrane that form in the presence of the protein caveolin. Caveolae are found in most cells, but are especially abundant in adipocytes. By high-resolution electron microscopy of plasma membrane sheets the detailed structure of individual caveolae of primary rat adipocytes was examined. Caveolin-1 and -2 binding was restricted to the membrane proximal region, such as the ducts or necks attaching the caveolar bulb to the membrane. This was confirmed by transfection with myc-tagged caveolin-1 and -2. Essentially the same results were obtained wi

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COLEMAN, G. N., D. FEDOROV, P. R. SPALART, and J. KIM. "A numerical study of laterally strained wall-bounded turbulence." Journal of Fluid Mechanics 639 (August 28, 2009): 443–78. http://dx.doi.org/10.1017/s0022112009991042.

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Direct numerical simulation (DNS) is used to study the effects of mean lateral divergence and convergence on wall-bounded turbulence, by applying uniform irrotational temporal deformations to a plane-channel domain. This extends a series of studies of similar deformations. Fast and slow straining fields are considered, leading to a matrix of four cases, all corresponding to zero-pressure-gradient (ZPG) flows along the centreplane in ducts with constant rectangular cross-sectional area but varying aspect ratio. The results are used to address basic physical and modelling questions, and create a

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Goktepeli, Ilker, Ulas Atmaca, and Sercan Yagmur. "Visualization of flow characteristics between the ribbed plates via particle image velocimetry." Thermal Science, no. 00 (2019): 300. http://dx.doi.org/10.2298/tsci180727300g.

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Heat transfer is considerably influenced by flow stagnation, separation and reattachment regions due to the ribbed plates. Placing the ribs such as fins, turbulators that trigger the flow separation, enhances the heat transfer inside the channel by increasing the turbulence intensity. The flow separation is caused by disturbing the thermal and hydrodynamic development lengths. Moreover, these ribs also make an impact that increases the heat transfer by enlarging the heat transfer area. However, the ribs lead to the increment of the required pumping power in the meantime due to the increasing p

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Baust, John M., Kimberly L. Santucci, Robert G. Van Buskirk, et al. "An In Vitro Investigation into Cryoablation and Adjunctive Cryoablation/Chemotherapy Combination Therapy for the Treatment of Pancreatic Cancer Using the PANC-1 Cell Line." Biomedicines 10, no. 2 (2022): 450. http://dx.doi.org/10.3390/biomedicines10020450.

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As the incidence of pancreatic ductal adenocarcinoma (PDAC) continues to grow, so does the need for new strategies for treatment. One such area being evaluated is cryoablation. While promising, studies remain limited and questions surrounding basic dosing (minimal lethal temperature) coupled with technological issues associated with accessing PDAC tumors and tumor proximity to vasculature and bile ducts, among others, have limited the use of cryoablation. Additionally, as chemotherapy remains the first-line of attack for PDAC, there is limited information on the impact of combining freezing wi

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Jingga, Trinovita Z., M. Riza Nurtam, Hendra, et al. "Effect of UV LED Intensity on The Growth of Red Lettuce in Indoor Hydroponics." IOP Conference Series: Earth and Environmental Science 1097, no. 1 (2022): 012054. http://dx.doi.org/10.1088/1755-1315/1097/1/012054.

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Abstract Microclimate control is increasingly widespread in limited agricultural environments. This is especially important for the cultivation of plants that tolerate significantly different thermal and hygrometric conditions. Nevertheless, there is much to be done in automation and control technology in this area to achieve the best results in both quantitative and qualitative terms of the product. This applies especially to horticultural crops that are sensitive to the cultivation environment and microclimate. This work aims to characterize the microclimate parameters in a confined agricult

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Seralathan, S., Pratham Sameer Mhatre, Deebak V. S. Vijay, A. Minvitha Kumari, and V. Hariram. "CFD Analysis of S-Duct with Varying Area Distributions." International Journal of Vehicle Structures and Systems 13, no. 5 (2021). http://dx.doi.org/10.4273/ijvss.13.5.12.

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The ideal design of an intake S-duct (serpentine duct) of the jet engine should be able to supply adequate air regardless of the operating conditions of the aircraft, efficiently decrease the speed of incoming compressible flow and turn it to the desired location. Total pressure losses should be as low as possible and pressure recovery should be as high as possible. To maximize the efficiency, the vortex generated due to the two curvatures must be suppressed. This can be achieved by varying the area distribution of the duct which helps in isolating the effects of diffusion and curvature as muc

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Guan, Wenyu, Zhongying Xiong, and Huan Xia. "A study on the acoustic propagation characteristics of circular expanding ducts using the finite element method." AIP Advances 15, no. 1 (2025). https://doi.org/10.1063/5.0249301.

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A circular expanding duct features an increasing cross-sectional area that tends to excite higher-order modes at low frequencies, thereby affecting the performance of acoustic devices. Studying the acoustic propagation characteristics of circularly expanding ducts is thus crucial for optimal design and noise control. Traditional prediction methods do not adequately account for three-dimensional wave effects inside a duct. This study investigates the sound attenuation performance of various circular expanding ducts in the frequency range of 10–2500 Hz using the three-dimensional finite element

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Zhang, Yanfeng, Shuzhen Hu, Ali Mahallati, Xue-Feng Zhang, and Edward Vlasic. "Effects of Area Ratio and Mean Rise Angle on the Aerodynamics of Interturbine Ducts." Journal of Turbomachinery 140, no. 9 (2018). http://dx.doi.org/10.1115/1.4039936.

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This work, a continuation of a series of investigations on the aerodynamics of aggressive interturbine ducts (ITD), is aimed at providing detailed understanding of the flow physics and loss mechanisms in four different ITD geometries. A systematic experimental and computational study was carried out by varying duct outlet-to-inlet area ratios (ARs) and mean rise angles while keeping the duct length-to-inlet height ratio, Reynolds number, and inlet swirl constant in all four geometries. The flow structures within the ITDs were found to be dominated by the boundary layer separation and counter-r

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"Effects of area change and friction on detonation stability in supersonic ducts." Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences 449, no. 1935 (1995): 31–49. http://dx.doi.org/10.1098/rspa.1995.0030.

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The stability of a detonation wave passing through opposed supersonic flow in a duct of varying cross section and with friction is studied numerically by a transient quasi-one-dimensional model, taking into account the unsteady motion of the duct and using a single-step Arrhenius reaction scheme. The analysis indicates that in a converging duct, that is, a nozzle raising the rate of area change drives a detonation wave towards instability, and adding roughness behind the shock front increases the detonation velocity and stabilizes the detonation wave. The stable detonation-wave configuration c

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Tong, Xiao-Tong, Lian-Jie Yue, Wan-Nan Wu, Qi-Fan Zhang, and Hao Chen. "Self-similar unstart characteristics of supersonic contraction duct with an expansion corner." Physics of Fluids 36, no. 1 (2024). http://dx.doi.org/10.1063/5.0180243.

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Inlet unstart is detrimental to hypersonic airbreathing flights. By unstart, we mean the separation-induced collapse of a supersonic duct flow. The unstart characteristics of a two-dimensional contraction duct with an expansion corner are numerically investigated to develop a universal prediction method and to determine the unstart mechanism. The unstart boundaries under varying contraction angles, entrance heights, and Reynolds numbers are obtained by translating the cowl plate. A self-similar empirical equation of unstart boundary that unifies multiple variables is proposed through similarit

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