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Journal articles on the topic 'PDMS software'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Shivashankar, Hiremath, and S. M. Kulkarni. "Modelling and Analysis of Thermomechanical Behaviour in Composite Bimorph Actuator." Materials Science Forum 928 (August 2018): 209–14. http://dx.doi.org/10.4028/www.scientific.net/msf.928.209.

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This paper presents study of a thermomechanical bimorph actuator, constituted by layers of polymer composite material. The proposed bimorph consists of polydimethylsiloxane (PDMS) and carbon black-polydimethylsiloxane (CB-PDMS) polymer composite layered structure. The thermomechanical response of the PDMS and CB-PDMS material is studied. Deflection of bimorph for change in temperature is studied for different thickness and volume percentage of CB bimorph. Three different thicknesses and three volume fractions of CB are used for analysis of bimorph. Deflections of the bimorph are obtained from

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Souza, Andrews, Eduardo Marques, Carlos Balsa, and João Ribeiro. "Characterization of Shear Strain on PDMS: Numerical and Experimental Approaches." Applied Sciences 10, no. 9 (2020): 3322. http://dx.doi.org/10.3390/app10093322.

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Polydimethylsiloxane (PDMS) is one of the most popular elastomers and has been used in different fields, especially in biomechanics research. Among the many interesting features of this material, its hyperelastic behavior stands out, which allows the use of PDMS in various applications, like the ones that mimic soft tissues. However, the hyperelastic behavior is not linear and needs detailed analysis, especially the characterization of shear strain. In this work, two approaches, numerical and experimental, were proposed to characterize the effect of shear strain on PDMS. The experimental metho

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Kazibudzki, Pawel Tadeusz. "On the Statistical Discrepancy and Affinity of Priority Vector Heuristics in Pairwise-Comparison-Based Methods." Entropy 23, no. 9 (2021): 1150. http://dx.doi.org/10.3390/e23091150.

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There are numerous priority deriving methods (PDMs) for pairwise-comparison-based (PCB) problems. They are often examined within the Analytic Hierarchy Process (AHP), which applies the Principal Right Eigenvalue Method (PREV) in the process of prioritizing alternatives. It is known that when decision makers (DMs) are consistent with their preferences when making evaluations concerning various decision options, all available PDMs result in the same priority vector (PV). However, when the evaluations of DMs are inconsistent and their preferences concerning alternative solutions to a particular p

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Izdihar, Kamal, Hairil Rashmizal Abdul Razak, Nurzulaikha Supion, Muhammad Khalis Abdul Karim, Nurul Huda Osman, and Mazlan Norkhairunnisa. "Structural, Mechanical, and Dielectric Properties of Polydimethylsiloxane and Silicone Elastomer for the Fabrication of Clinical-Grade Kidney Phantom." Applied Sciences 11, no. 3 (2021): 1172. http://dx.doi.org/10.3390/app11031172.

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This study aimed to introduce an alternative, inexpensive, and straightforward polymer with specific mechanical and dielectric properties suitable for the fabrication of a clinical-grade kidney phantom. Two polymer-based phantom materials, polydimethylsiloxane (PDMS) and silicone elastomer (SE), were investigated for their capability to meet the requirements. The concentration ratios of base to curing agent (B/C) were 9.5/1.5, 19/3, 10/1, 20/2, 10.5/0.5, and 21/1 for PDMS and 4.5/5.5, 10/12, 5/5, 11/11, 5.5/4.5, and 12/10 for SE. All samples were mixed, degassed, and poured into Petri dishes a

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Chiu, Chui Yu, Hsin Chuan Kuo, Yi Lin, Jeou Long Lee, Yung Kang Shen, and Sheng Jie Kang. "Optimal Design of Microneedles Inserts into Skin by Numerical Simulation." Key Engineering Materials 516 (June 2012): 624–28. http://dx.doi.org/10.4028/www.scientific.net/kem.516.624.

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The purpose of this research is to find the optimal design for biodegradable polymer microneedle patches. Based on the mechanical properties of different skin layers and the failure criterion of the material, this research designs a microneedle of four types and three sizes, then discusses the insertion force and the variation of stress during the process of PLA microneedle insertion into skin by numerical simulation. This research uses the dynamic finite element software ANSYS / LS-DYNA to simulate the processing for PLA microneedle inserts into skin. The master microneedle array was fabricat

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Segura-Borrego, M. Pilar, Rocío Ríos-Reina, Cristina Ubeda, Raquel M. Callejón, and M. Lourdes Morales. "Comparison of the Novel Thin Film-Solid Phase Microextraction and Sorptive Extraction Methods for Picual and Hojiblanca Olive Oil Volatile Fraction Analysis in Headspace." Foods 9, no. 6 (2020): 748. http://dx.doi.org/10.3390/foods9060748.

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For first time, the new device named thin film solid phase microextraction (TF-SPME) has been used to determine the volatile profile of the Picual and Hojiblanca varieties of extra virgin olive oils. To this end, different traditional sampling methods such as headspace sorptive extraction (HSSE) with polydimethylsiloxane (PDMS) and polyethyleneglycol-modified silicone (EG/Silicone) Twisters® have been compared with the TF-SPME devices coated with different extraction polymeric phases. PARADISe software was used as a non-targeting method to process all data. The best results were obtained by HS

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Montgomery, R. Hunter, Kelsey Phelan, Sawyer D. Stone, Francois Decuir, and Bryant C. Hollins. "Photolithography-free PDMS stamps for paper microdevice fabrication." Rapid Prototyping Journal 24, no. 2 (2018): 361–67. http://dx.doi.org/10.1108/rpj-01-2017-0011.

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Purpose This paper aims to investigate the applicability of 3D-printed molds to be used as a substitute for photolithography in the formation of polymer-based stamps. It proposes leveraging 3D printing as a rapid prototyping tool to be applied to microfluidic fabrication. Design/methodology/approach Different designs are created using computer-aided design (CAD) software and printed via Makerbot 3D printer. The molds serve as negative reliefs for a PDMS stamp. The stamp is used to apply paraffin wax to chromatography paper, creating hydrophobic barriers and hydrophilic channels. The minimum fu

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Sidirourgos, Lefteris, George Kokkinidis, Theodore Dalamagas, Vassilis Christophides, and Timos Sellis. "Indexing views to route queries in a PDMS." Distributed and Parallel Databases 23, no. 1 (2008): 45–68. http://dx.doi.org/10.1007/s10619-007-7021-0.

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Chen, Yu Tang, Chin Chun Hsu, Shung Wen Kang, and Lung Chi Wu. "Fabrication and Investigation of Curved PDMS Micro Nozzle/Diffuser." Materials Science Forum 594 (August 2008): 357–62. http://dx.doi.org/10.4028/www.scientific.net/msf.594.357.

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This study describes the results on the fabrication, testing and analysis of curved micro nozzle/diffuser. First, we use different polymers, SU-8 and polydimethylsiloxane (PDMS) for the fabrication of curved micro nozzle/diffuser. By using the low-temperature bonding technique, we can combine the structure with the glass and accomplish the component. In order to understand the investigation and analysis of fluid dynamics characteristics, we measure the pressure and flow of curved micro nozzle/diffuser and the commercially available software CFD was adopted for analyzing the performance of stra

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Alikhani, Nasim, Douglas W. Bousfield, Jinwu Wang, Ling Li, and Mehdi Tajvidi. "Numerical Simulation of the Water Vapor Separation of a Moisture-Selective Hollow-Fiber Membrane for the Application in Wood Drying Processes." Membranes 11, no. 8 (2021): 593. http://dx.doi.org/10.3390/membranes11080593.

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In this study, a simplified two-dimensional axisymmetric finite element analysis (FEA) model was developed, using COMSOL Multiphysics® software, to simulate the water vapor separation in a moisture-selective hollow-fiber membrane for the application of air dehumidification in wood drying processes. The membrane material was dense polydimethylsiloxane (PDMS). A single hollow fiber membrane was modelled. The mass and momentum transfer equations were simultaneously solved to compute the water vapor concentration profile in the single hollow fiber membrane. A water vapor removal experiment was con

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Yang, Ran, Wenyi Liu, Wanjia Gao, and Dingwei Kang. "Design of Piezoelectric Ultrasonic Transducer Based on Doped PDMS." Sensors 21, no. 9 (2021): 3123. http://dx.doi.org/10.3390/s21093123.

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The performance of the ultrasonic transducer will directly affect the accuracy of ultrasonic experimental measurement. Therefore, in order to meet the requirements of a wide band, a kind of annular 2-2-2 piezoelectric composite is proposed based on doped PDMS. In this paper, the transducer structure consisted of PZT-5A piezoelectric ceramics and PDMS doped with 3 wt.% Al2O3:SiO2 (1:6) powder, which constituted the piezoelectric composite. MATLAB and COMSOL software were used for simulation. Meanwhile, the electrode materials were selected. Then, the performance of the designed annular 2-2-2 ul

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Pilu, Maurizio, and Robert B. Fisher. "Training PDMs on models: The case of deformable superellipses." Pattern Recognition Letters 20, no. 5 (1999): 463–74. http://dx.doi.org/10.1016/s0167-8655(99)00011-2.

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Lee, Kwang Chul, and Nam Seo Goo. "Performance Evaluation of a Valveless Micropump Considering Electro-Structural-Fluid Interaction." Key Engineering Materials 345-346 (August 2007): 749–52. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.749.

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In this paper, the pumping performance of a piezoelectric micropump is simulated with commercial finite element analysis (FEA) software COMSOL Multiphysics 3.2a. The micropump is composed of a 4-layer piezo-composite actuator (LIPCA), a polydimethylsiloxane (PDMS) pump chamber, and two diffusers. The piezoelectric domain, structural domain and fluid domain are coupled in the simulation. Water flow rates are numerically predicted for geometric parameters of the micropump. Based on this study, the micropump is optimally designed to obtain its better pumping performance.

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Humayun, Q., Uda Hashim, and Che Mohd Ruzaidi. "Structure Characterization of Low Cost Fabricated Soft Material Built Microchannel." Materials Science Forum 857 (May 2016): 578–82. http://dx.doi.org/10.4028/www.scientific.net/msf.857.578.

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To perform the entire laboratory activities on a centimeter limit scale electronic chip, the most important aspect is to fabricate a device which persist sensitive and selective for the delivery of fluids flow and have the ability to execute a fast mixing of distinctive chemicals and bio samples. To resolve this issues the current paper is one of the good struggle, therefore the objective was arranged in according to the scope of research such as; to design and fabricate a polydimethylsiloxane (PDMS) material made, micro channel and its structure characterization for the investigation of inter

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Qu, Ningsong, Xiaolei Chen, Hansong Li, and Di Zhu. "Fabrication of PDMS micro through-holes for electrochemical micromachining." International Journal of Advanced Manufacturing Technology 72, no. 1-4 (2014): 487–94. http://dx.doi.org/10.1007/s00170-014-5702-1.

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Qin, Tianliang, Libin Zhao, Jifeng Xu, Fengrui Liu, and Jianyu Zhang. "Model of CEL for 3D Elements in PDMs of Unidirectional Composite Structures." Computer Modeling in Engineering & Sciences 118, no. 1 (2019): 157–76. http://dx.doi.org/10.31614/cmes.2019.04379.

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Lamba, Monica, Naman Mittal, Kulwant Singh, and Himanshu Chaudhary. "Design analysis of polysilicon piezoresistors PDMS (Polydimethylsiloxane) microcantilever based MEMS Force sensor." International Journal of Modern Physics B 34, no. 09 (2020): 2050072. http://dx.doi.org/10.1142/s0217979220500721.

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This study is aimed for the analysis of different designs for sensing low magnitude forces which lies in the micro-Newton range and suitable for biomimetic microbotics. For this, a flexible and high sensitive Micro Electro Mechanical System (MEMS) based Force sensor using piezoresistive sensing mechanism has been analyzed. Design analysis is carried out for sensitivity enhancement on microcantilever by incorporating various combinations of stress concentrated regions (SCR) and their respective arrays. The materials under consideration for sensor are polysilicon piezoresistors and Polydimethyls

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Cao, Jing Tong, Feng Cui, Wei Chen, et al. "A PCR Chip with Reusable Electrodes and its Temperature Analysis." Applied Mechanics and Materials 742 (March 2015): 54–57. http://dx.doi.org/10.4028/www.scientific.net/amm.742.54.

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This paper presents a new micromachined PCR chip with separable electrodes part and reaction chamber part. The electrodes part, employing Pt film resistor as heaters and sensors, is reusable, and the chamber part is a disposable PDMS-GLASS bonded structure. This PCR chip with reusable electrodes can largely reduce fabrication cost. COMSOL software is used to simulate the temperature distribution of the designed chip and then use infrared thermometer (NEC R300SR) to verify temperature distribution of the fabricated chip. The test results turned out to perfectly fit the simulation of temperature

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Doan, Thien Minh, Khoi Nguyen Nguyen Tran, Tuan Dinh Le, Cang Trong Vo, and Chung Quang Dinh. "SHIP ASSEMBLY DESIGN BY 3D MODELING." Science and Technology Development Journal 14, no. 4 (2011): 53–64. http://dx.doi.org/10.32508/stdj.v14i4.2007.

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Since Vietnam began to open up to the outside world in the 1990s, its national shipbuilding industry has witnessed great development. So far it has assumed a share of the international shipbuilding market. To build ships for foreign custumers is obviously more complicated than for dosmetic shipowners. Nowadays, the computer technology has been advancing greatly. So, to compete with foreign designs, we have also devised a strategy to develop its techniques and technology by acquiring the latest software from advanced shipbuilding countries like United States, Europe, Korea, Japan, China, … Amon

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Nicholson-Smith, Chloë, George K. Knopf, and Evgueni Bordatchev. "Parametric analysis of thin multifunctional elastomeric optical sheets." Advanced Optical Technologies 7, no. 4 (2018): 209–24. http://dx.doi.org/10.1515/aot-2018-0012.

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Abstract Flexible optical sheets are thin large-area polymer light guide structures that can be used to create innovative passive light-harvesting and illumination systems. The optically transparent micro-patterned polymer sheet is designed to be draped over arbitrary surfaces or hung like a curtain. The light guidance sheet is fabricated by bonding two or more micro-patterned layers with different indices of optical refraction. By imprinting micro-optical elements on the constituent layers, it is possible to have portions of the optical sheet act as a light concentrator, near ‘lossless’ trans

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Du, Xin, and Li Jun Guo. "Modeling of Capillary Burst Valve and Siphon with Hydrophilic Cover for Centrifugal Microfluidic Systems." Advanced Materials Research 631-632 (January 2013): 858–63. http://dx.doi.org/10.4028/www.scientific.net/amr.631-632.858.

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This paper reports numerical and experimental investigation of capillary burst valve and siphon, which were used in the centrifugal microfluidic systems widely. The simulation model is based on the solution of the minimum energy problem by the Surface Evolver software. In contrast to the solution of meniscus equilibrium equations, it can provide the appropriate boundary conditions for the microvalves with a hydrophilic flat cover. As an experimental verification, a centrifugal microfluidic device based on PDMS and glass was fabricated by soft lithography. The simulated results agree well with

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Lauk-Dubitsky, S. E., T. A. Astrelina, A. A. Fedyunin, et al. "COMPLEX APPROACH FOR PORTABLE CRYOPRESERVATION OF SEGMENTS OF BLOOD VESSELS WITH POLYDIMETHYLSILOXANE." Russian Journal of Transplantology and Artificial Organs 20, no. 1 (2018): 86–95. http://dx.doi.org/10.15825/1995-1191-2018-1-86-95.

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Aim.To develop a safe protocol for cryopreservation of segments of iliac arteries straight after their retrieval from post-mortem donor with the use of polydimethylsiloxane as a coolant and cryoprotectant.Materials and methods.Eleven segments of iliac arteries were retrieved from post-mortem donor and divided into four groups including control. Based on preliminary heat and cold transfer mathematical modeling and tests with tissueequivalent phantom arterial segments were placed on plastic mounts and cryopreserved by following protocol: groups 1 and 2 were immersed in polydimethylsiloxane and c

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Ye, Huichun, Lianguan Shen, Mujun Li, and Likai Li. "A Microlens Array with Different Focal Lengths Fabricated by Roll-To-Roll UV Lithography." Polymers and Polymer Composites 26, no. 2 (2018): 155–59. http://dx.doi.org/10.1177/096739111802600203.

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A simple, highly efficient and low cost roll-to-roll (R2R) UV imprinting lithography facility was achieved for fabricating micro-structures. Firstly, a novel microlens array with focuses distributed on a curved surface was designed and analyzed by an optical software ZEMAX. Then an ultra-precision diamond machine was applied to generate the freeform microlens array features on the master mold, and a belt-type polydimethylsiloxane (PDMS) mold with a microlens array pattern was prepared from the machined master mold. The R2R process was employed to replicate the microlens arrays, followed by an

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Prathungthai, Prapatsorn, Sutham Srilomsak, Wimonlak Sutapun, Sukasem Watcharamaisakul, and Lada Punsukumtana. "Effect of Processing Parameters of Hydrophobic Film on Ceramic Tile." Solid State Phenomena 263 (September 2017): 97–102. http://dx.doi.org/10.4028/www.scientific.net/ssp.263.97.

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In this research study the fabricated of hydrophobic of SiO2 nanoparticles was modified with tetraethylorthosilicate (TEOS), poly-(dimethylsiloxane) (PDMS) and methyltriethoxysilane (MTES) by using a sol-gel method. The effects of precursors, coating techniques and curing conditions were investigated. A water contact angle (WCA) measurement done using a sessile drop method with an optical contact measuring apparatus. Morphologies of the hydrophobic films were depicted using scanning electron microscopy (SEM). All data were analyzed using Design Expert® software. Results shown that a morphology

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Sivarapatna, Amogh, Mahboobe Ghaedi, Yang Xiao, et al. "Engineered Microvasculature in PDMS Networks Using Endothelial Cells Derived from Human Induced Pluripotent Stem Cells." Cell Transplantation 26, no. 8 (2017): 1365–79. http://dx.doi.org/10.1177/0963689717720282.

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In this study, we used a polydimethylsiloxane (PDMS)-based platform for the generation of intact, perfusion-competent microvascular networks in vitro. COMSOL Multiphysics, a finite-element analysis and simulation software package, was used to obtain simulated velocity, pressure, and shear stress profiles. Transgene-free human induced pluripotent stem cells (hiPSCs) were differentiated into partially arterialized endothelial cells (hiPSC-ECs) in 5 d under completely chemically defined conditions, using the small molecule glycogen synthase kinase 3β inhibitor CHIR99021 and were thoroughly charac

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Manea, Elena, Catalin Parvulescu, Munizer Purica, Elena Budianu, and Constantin Tibeica. "Optical Microconcentrator System for Enhancing Solar Cell Photovoltaic Performances." Defect and Diffusion Forum 369 (July 2016): 65–70. http://dx.doi.org/10.4028/www.scientific.net/ddf.369.65.

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In this paper, we present two optical microconcentrator systems consisting of an array of microlenses formed with an intermediate layer deposited between a textured glass plate and the front surface of a silicon solar cell and polydimethylsiloxane (PDMS) microlenses based on replication of molds etched on glass. The optical coupling microlenses are fabricated using simple photolithography techniques that make the design compatible with silicon technology and large-scale manufacturing.We experimented with a honeycomb texturization on Corning glass plate having an area of 2x2 cm2. A wet etching

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Kenessov, Bulat, Jacek Koziel, Nassiba Baimatova, Olga Demyanenko, and Miras Derbissalin. "Optimization of Time-Weighted Average Air Sampling by Solid-Phase Microextraction Fibers Using Finite Element Analysis Software." Molecules 23, no. 11 (2018): 2736. http://dx.doi.org/10.3390/molecules23112736.

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Determination of time-weighted average (TWA) concentrations of volatile organic compounds (VOCs) in air using solid-phase microextraction (SPME) is advantageous over other sampling techniques, but is often characterized by insufficient accuracies, particularly at longer sampling times. Experimental investigation of this issue and disclosing the origin of the problem is problematic and often not practically feasible due to high uncertainties. This research is aimed at developing the model of the TWA extraction process and optimization of TWA air sampling by SPME using finite element analysis so

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Zhou, Yong, and Shi Li. "Analysis of Variable Section Piezoelectric Harvester." Advanced Materials Research 734-737 (August 2013): 2638–41. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.2638.

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This paper first presents an analytical model for investigating the vibration performance of a thin curved laminated piezoelectric beam with variable curvatures and transverse sections. This kind of beam is widely used for the MEMS piezoelectric vibration energy harvester. The curved thin beam theory with bisymmetric section, here rectangular section used, is employed to explore the bending and twisting coupling vibration characteristics. In order to study the vibration properties with concentrated load, the effects of the tip proof mass isnt used. The paper also shows that the adoption of ANS

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Dulkarim, Nur Rabihah, Mohd Fairus Mohd Yusoff, and Zaharah Johari. "Miniturize Flexible RFID Antenna Design using Metamaterial Structure." ELEKTRIKA- Journal of Electrical Engineering 18, no. 2 (2019): 55–59. http://dx.doi.org/10.11113/elektrika.v18n2.165.

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Radio Frequency Identification (RFID) is the application of electromagnetic fields to identify and track tags that attached on the objects. It transmits or reads the radio frequency waves in the system. However, due to rapid development of technology in telecommunication, a much more smaller and flexible device is needed. Therefore, in this paper, a new design of flexible RFID antenna using metamaterial structure has been proposed. At first, the basic rectangular microstrip patch antenna with resonant frequency of 900MHz is designed. Then, the CSRR metamaterial structure is introduced at the g

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Pan, C. T., Y. C. Chen, Y. J. Chen, W. C. Wang, H. C. Yang, and H. C. Wu. "Compound Optical Film Using Gray Scale Mask Embedded with Microvoids." Advances in Condensed Matter Physics 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/942018.

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This study presents a compound optical film to improve luminance and uniformity to apply in side-LED (light-emitting diode) backlight module. LIGA (lithographie galvanoformung abformung) technology, soft lithography, and homemade gray scale mask were combined to fabricate microlens array. Optical film with variable size microlens array embedded with microvoids was designed and manufactured. FRED software was used to simulate optical performance. Microvoids were quantitatively embedded in the PDMS (polydimethylsiloxane) optical film. Under the quantitative control of air pressure, those microvo

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Prahasto, Toni, Djoeli Satrijo, and I. Nyoman Chandra Kusuma. "DESAIN DAN ANALISIS TEGANGAN PADA SISTEM PERPIPAAN LEPAS PANTAI UNTUK SPM 250,000 DWT." ROTASI 18, no. 3 (2016): 93. http://dx.doi.org/10.14710/rotasi.18.3.93-100.

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Perancangan sistem perpipaan bawah laut ini mengacu pada code ASME B31.4 chapter IX. Sistem perpipaan ini terdiri dari sistem perpipaan onshore dan offshore dan terdiri dari 2 buah pipa dengan jenis pipa twin pipe dengan dimensi yang sama. Jalur pipa ini offshore ini memiliki jalur dari SPM 250,000 DWT menuju tangki storage yang berada di daratan balongan. Jalur pipa ini memiliki tekanan operasi sebesar 1,070 KPa, temperatur operasi sebesar 70oC dan laju aliran fluida sebesar 1.85 m3/s. Jalur perpipaan ini terletak di lepas pantai banyuwangi dengan karakteristik tanah yang didominasi oleh pasi

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Loh, Han Tong, Jerry Fuh, and Sev Nagalingam. "Editorial for the Special Issue of RCIM for (PDMS 07) on Advanced Robotic and Machine Design." Robotics and Computer-Integrated Manufacturing 26, no. 3 (2010): 223. http://dx.doi.org/10.1016/j.rcim.2010.03.001.

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Chen, Y. C., C. T. Pan, H. C. Wu, Y. J. Chen, and H. C. Yang. "Compound Optical Film Using Gray Scale Mask Embedded with Micro-Voids." Applied Mechanics and Materials 479-480 (December 2013): 155–60. http://dx.doi.org/10.4028/www.scientific.net/amm.479-480.155.

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This study presents a compound optical film to improve luminance and uniformity to apply in side-LED (Light-emitting diode) backlight module. LIGA (Lithographie GalVanoformung Abformung) technology, soft lithography and homemade gray scale mask were combined to fabricate micro-lens array. Optical film with variable size micro-lens array embedded with micro-voids was designed and manufactured. FRED software was used to simulate optical performance. Micro-voids were quantitatively embedded in the PDMS (Polydimethylsiloxane) optical film. Under the quantitative control of air pressure, those micr

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George, Mosotho J., Patrick B. Njobeh, Sefater Gbashi, Gabriel O. Adegoke, Ian A. Dubery, and Ntakadzeni E. Madala. "Rapid Screening of Volatile Organic Compounds from Aframomum danielli Seeds Using Headspace Solid Phase Microextraction Coupled to Gas Chromatography Mass Spectrometry." International Journal of Analytical Chemistry 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/8976304.

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Volatile organic compounds (VOCs) derived from plants have been used in the fragrance industry since time immemorial. Herein we report on the rapid screening of VOCs from seeds of ripe Aframomum danielli (family, Zingiberaceae) using a polydimethylsiloxane fibre headspace solid phase microextraction coupled to a gas chromatography mass spectrometry (SPME-GC/MS) instrument. Portions of 0.25, 0.35, and 0.50 g of ground sample were weighed and extraction of volatile organic compounds (VOCs) was achieved using a 100 μm polydimethylsiloxane solid phase microextraction (PDMS SPME) fibre, with the eq

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Lefebvre, Olivier, Hong Ha Cao, Meritxell Cortés Francisco, et al. "Reusable Embedded Microcoils for Magnetic Nano-Beads Trapping in Microfluidics: Magnetic Simulation and Experiments." Micromachines 11, no. 3 (2020): 257. http://dx.doi.org/10.3390/mi11030257.

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In this study, a microfluidic chip with integrated coil was designed and fabricated for the aim of effectively trapping magnetic nanobeads (Adembeads®, 300 nm) and measuring the chip’s temperature during the working time. In addition, a reversible technique of bonding Polydimethylsiloxane (PDMS) channels was presented. This bonding process used a coating layer of CYTOP®product as a protection, insulation and low-adhesion layer. The reversible packaging technique allows the bottom substrate to be reused, possibly equipped with sensors, and to use a disposable microchannels network. The FE metho

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Kusaka, Yasuyuki, Atsushi Hirata, and Hirobumi Ushijima. "Direct adhesion contrast patterning on PDMS substrate by ArF excimer laser scanning for on-demand printing of functional layers." International Journal of Advanced Manufacturing Technology 99, no. 1-4 (2018): 859–65. http://dx.doi.org/10.1007/s00170-018-2384-0.

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Zhang, Guiguan, Yuli Sun, Xu Liu, Liaoyuan Wang, and Dunwen Zuo. "Prediction of erosion volume of PDMS by cryogenic micro-abrasive jet machining based on dimensional analysis method and experimental verification." International Journal of Advanced Manufacturing Technology 114, no. 7-8 (2021): 2447–55. http://dx.doi.org/10.1007/s00170-021-07020-7.

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Li, Hongshen, Hongrui Liu, Yufang Li, Jilin Nan, Chen Shi, and Shizhong Li. "Combined Vapor Permeation and Continuous Solid-State Distillation for Energy-Efficient Bioethanol Production." Energies 14, no. 8 (2021): 2266. http://dx.doi.org/10.3390/en14082266.

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Extracting ethanol by steam directly from fermented solid-state bagasse is an emerging technology of energy-efficient bioethanol production. With continuous solid-state distillation (CSSD) approach, the vapor with more than 25 wt% ethanol flows out of the column. Conventionally, the vapor was concentrated to azeotrope by rectification column, which contributes most of the energy consumption in ethanol production. As an alternative, a process integrating CSSD and vapor permeation (VP) membrane separation was tested. In light of existing industrial application of NaA zeolite hydrophilic membrane

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Gonçalves, Inês M., César Rocha, Reinaldo R. Souza, et al. "Numerical Optimization of a Microchannel Geometry for Nanofluid Flow and Heat Dissipation Assessment." Applied Sciences 11, no. 5 (2021): 2440. http://dx.doi.org/10.3390/app11052440.

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In this study, a numerical approach was carried out to analyze the effects of different geometries of microchannel heat sinks on the forced convective heat transfer in single-phase flow. The simulations were performed using the commercially available software COMSOLMultiphysics 5.6® (Burlington, MA, USA) and its results were compared with those obtained from experimental tests performed in microchannel heat sinks of polydimethylsiloxane (PDMS). Distilled water was used as the working fluid under the laminar fluid flow regime, with a maximum Reynolds number of 293. Three sets of geometries were

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Chevalier, M., R. Cheddadi, and B. M. Chase. "CREST: Climate REconstruction SofTware." Climate of the Past Discussions 10, no. 1 (2014): 625–63. http://dx.doi.org/10.5194/cpd-10-625-2014.

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Abstract. Several methods currently exist to quantitatively reconstruct palaeoclimatic variables from fossil botanical data. Of these, pdf-based (probability density functions) methods have proven valuable as they can be applied to a wide range of plants assemblages. Most commonly applied to fossil pollen data, their performance, however, can be limited by the taxonomic resolution of the pollen data, as many species may belong to a given pollen-type. Consequently, the climate information associated with different species cannot sometimes not be precisely identified, resulting less accurate rec

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Wei, Che Hung, and Lin Chi Wu. "The Effect of Frequency on the Flow and Particle Collection Patterns under Electroosmosis." Key Engineering Materials 605 (April 2014): 59–62. http://dx.doi.org/10.4028/www.scientific.net/kem.605.59.

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The collection and manipulation of small objects is important in bioassays. One commonly used force to manipulate small objects is electroosmosis which has the advantages of easy fabrication and small power consumption. Many factors affect the electroosmosis like surface charge density, applied voltage and frequency. For ac electroosmosis, frequency affects flow pattern and particle collection. In this study, the role of frequency is investigated by experiments and verified by numerical simulation. The electroosmosis collecting chip is made of two parallel electrodes separated by a spacer. The

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Matsuura, K., J. Li, Y. Kuroda, et al. "88 COMPARISON BETWEEN STATIC AND DYNAMIC CULTURE RESULTS USING A NOVEL AIR ACTUATION SYSTEM." Reproduction, Fertility and Development 24, no. 1 (2012): 156. http://dx.doi.org/10.1071/rdv24n1ab88.

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Mammalian embryos experience not only hormonal stimuli, but also mechanical stimuli (MS), such as shear stress (SS), compression and friction force, in the fallopian tube before nidation. Embryo development performed using previously described in vitro dynamic culture systems is significantly better than that performed using conventional static culture systems. Previously, we found that thawed human embryos showed developmental improvement in the blastocyst stage following a tilting embryo culture system (TECS) culture compared with static culture. However, a disadvantage of the system is the

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Rashid, Naqib Fuad Abd, Revathy Deivasigamani, M. F. Mohd Razip Wee, Azrul Azlan Hamzah, and Muhamad Ramdzan Buyong. "Integration of a Dielectrophoretic Tapered Aluminum Microelectrode Array with a Flow Focusing Technique." Sensors 21, no. 15 (2021): 4957. http://dx.doi.org/10.3390/s21154957.

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We present the integration of a flow focusing microfluidic device in a dielectrophoretic application that based on a tapered aluminum microelectrode array (TAMA). The characterization and optimization method of microfluidic geometry performs the hydrodynamic flow focusing on the channel. The sample fluids are hydrodynamically focused into the region of interest (ROI) where the dielectrophoresis force (FDEP) is dominant. The device geometry is designed using 3D CAD software and fabricated using the micro-milling process combined with soft lithography using PDMS. The flow simulation is achieved

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Wissick, Cheryl. "Book and Software Review." Journal of Special Education Technology 17, no. 3 (2002): 56–57. http://dx.doi.org/10.1177/016264340201700306.

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In this column, Windy Schweder, doctoral student at the University of South Carolina has reviewed the possibilities of wearable technology for persons with disabilities. Ms. Schweder became interested in wearable technology in 1999 and pursued the use of it as a study for her dissertation. In Spring 2000, she submitted a grant to Xybernaut ( http://www.xybernaut.com ) for the study of wearable computer and multimedia technologies. In Fall 2000, she was provided a MA IV Deluxe computer. Given the futurist nature of wearable technology, I asked Ms. Schweder to discuss wearable technology and com

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Lotfiani, Amin, and Ghader Rezazadeh. "A new two-layer passive micromixer design based on SAR-vortex principles." International Journal of Chemical Reactor Engineering 19, no. 3 (2021): 309–29. http://dx.doi.org/10.1515/ijcre-2020-0222.

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Abstract Micromixers are key components of microfluidic systems for sample analysis, bioreactors, drug delivery, and many other applications. To date, numerous passive micromixer designs have been proposed. Among those, several designs with complex design structures have been demonstrated to be efficient. In the present work, the authors try to propose a new efficient design with low complexity in terms of fabrication. The new design is two-layer and is based on the split and recombination (SAR) and vortex mixing principles. It is suggested to fabricate the new design in polydimethylsiloxane (

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Wang, Rong, Patrick Keast, and Paul Muir. "A comparison of adaptive software for 1D parabolic PDEs." Journal of Computational and Applied Mathematics 169, no. 1 (2004): 127–50. http://dx.doi.org/10.1016/j.cam.2003.12.016.

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Fox, Brent I., and Bill G. Felkey. "Business Applications for PDAs." Hospital Pharmacy 37, no. 10 (2002): 1109–11. http://dx.doi.org/10.1177/001857870203701010.

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Last month, we focused on clinical software for the personal digital assistant (PDA). This month, we categorize and review PDA business applications. As administrators and clinicians integrate PDAs more fully into their professional and personal lives, they should consider adding business applications such as those described in this article.

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Neugebauer, Tomasz, and Bin Han. "Batch Ingesting into EPrints Digital Repository Software." Information Technology and Libraries 31, no. 1 (2008): 113. http://dx.doi.org/10.6017/ital.v31i1.1861.

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<p>This paper describes the batch importing strategy and workflow used for the import of theses metadata and PDF documents into the EPrints digital repository software. A two-step strategy of importing metadata in MARC format followed by attachment of PDF documents is described in detail, including Perl source code for scripts used. The processes described were used in the ingestion of 6,000 theses metadata and PDFs into an EPrints institutional repository. <strong></strong></p>

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Nadzri, Ainol Hayah Ahmad, Dzulkiflee Ismail, Saravana Kumar Jayaram, Noor Zuhartini Md Muslim, and Wan Nur Syuhaila Mat Desa. "Precursor Profiling of Extracted Pseudoephedrine Using Gas Chromatography-Mass Spectrometry (GCMS) in Conjunction with Chemometric Procedure." Materials Science Forum 1025 (March 2021): 209–18. http://dx.doi.org/10.4028/www.scientific.net/msf.1025.209.

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Various methods for the clandestine manufacture of amphetamine-type stimulant (ATS) involve the extraction and subsequent reaction of pseudoephedrine salts with other essential chemicals. The precursor seized in clandestine laboratory operation is supplied from illegal sources or clandestinely extracted from decongestant tablets (despite the presence of excipients that serve to hamper re-extraction). This work reports the organic profiling of pseudoephedrine from a simulated clandestine extract of different decongestant tablets formulations. The study aims to determine the feasibility of the c

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Zheng, Weibo, Jing Chen, Thomas G. Doak, Weibo Song, and Ying Yan. "ADFinder: accurate detection of programmed DNA elimination using NGS high-throughput sequencing data." Bioinformatics 36, no. 12 (2020): 3632–36. http://dx.doi.org/10.1093/bioinformatics/btaa226.

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Abstract Motivation Programmed DNA elimination (PDE) plays a crucial role in the transitions between germline and somatic genomes in diverse organisms ranging from unicellular ciliates to multicellular nematodes. However, software specific for the detection of DNA splicing events is scarce. In this paper, we describe Accurate Deletion Finder (ADFinder), an efficient detector of PDEs using high-throughput sequencing data. ADFinder can predict PDEs with relatively low sequencing coverage, detect multiple alternative splicing forms in the same genomic location and calculate the frequency for each

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