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https://www.readbyqxmd.com/read/27933420/comparative-simulation-study-of-chemical-synthesis-of-functional-dadne-material
#1
Min Hsien Liu, Chuan Wen Liu
Amorphous molecular simulation to model the reaction species in the synthesis of chemically inert and energetic 1,1-diamino-2,2-dinitroethene (DADNE) explosive material was performed in this work. Nitromethane was selected as the starting reactant to undergo halogenation, nitration, deprotonation, intermolecular condensation, and dehydration to produce the target DADNE product. The Materials Studio (MS) forcite program allowed fast energy calculations and reliable geometric optimization of all aqueous molecular reaction systems (0...
January 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/27933246/a-quantitative-report-on-the-impact-of-chloride-on-the-kinetic-coefficients-of-auxin-induced-growth-a-numerical-contribution-to-the-acid-growth-hypothesis
#2
Mariusz Pietruszka, Aleksandra Haduch-Sendecka
This work presents the application of several our own novel methods of analysing the kinetics of plant growth, which create, among others, a common platform for the comparison of experimental results. A relatively simple formula is used to parameterize the wide range of data that has been obtained for Zea mays L. in the literature, though it can also be used for different species. A biophysical/biochemical interpretation of the parameters was obtained from a theoretical model that is based on a modified Lockhart equation...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27932907/optimized-r-functions-for-analysis-of-ecological-community-data-using-the-r-virtual-laboratory-rvlab
#3
Constantinos Varsos, Theodore Patkos, Anastasis Oulas, Christina Pavloudi, Alexandros Gougousis, Umer Zeeshan Ijaz, Irene Filiopoulou, Nikolaos Pattakos, Edward Vanden Berghe, Antonio Fernández-Guerra, Sarah Faulwetter, Eva Chatzinikolaou, Evangelos Pafilis, Chryssoula Bekiari, Martin Doerr, Christos Arvanitidis
BACKGROUND: Parallel data manipulation using R has previously been addressed by members of the R community, however most of these studies produce ad hoc solutions that are not readily available to the average R user. Our targeted users, ranging from the expert ecologist/microbiologists to computational biologists, often experience difficulties in finding optimal ways to exploit the full capacity of their computational resources. In addition, improving performance of commonly used R scripts becomes increasingly difficult especially with large datasets...
2016: Biodiversity Data Journal
https://www.readbyqxmd.com/read/27932856/three-dimensional-soft-tissue-analysis-of-the-hand-a-novel-method-to-investigate-effects-of-acromegaly
#4
Inge A Hoevenaren, M A E M Wagenmakers, S H P P Roerink, R T Netea-Maier, D J O Ulrich, Thomas J J Maal
BACKGROUND: Acral overgrowth is a highly common clinical sign in patients with active acromegaly. To what extent this overgrowth persists after long-term remission of acromegaly is largely unknown. Using the new imaging technique of three-dimensional (3D) stereophotogrammetry, it is possible to accurately investigate soft tissue changes of the hand. The aim of the recent study was to compare the 3D soft tissue characteristics of the hands of patients in long-term remission of acromegaly to those of a healthy pair matched control group...
2016: European Journal of Plastic Surgery
https://www.readbyqxmd.com/read/27932550/spermaurin-an-la1-like-peptide-from-the-venom-of-the-scorpion-scorpio-maurus-palmatus-improves-sperm-motility-and-fertilization-in-different-mammalian-species
#5
Guillaume Martinez, Jean-Pascal Hograindleur, Sébastien Voisin, Roland Abi Nahed, Tarek M Abd El Aziz, Jessica Escoffier, Julien Bessonnat, Claire-Maëlle Fovet, Michel De Waard, Sylviane Hennebicq, Vincent Aucagne, Pierre F Ray, Eric Schmitt, Philippe Bulet, Christophe Arnoult
STUDY QUESTION: Is it possible to identify original compounds that are able to enhance sperm motility from the venom of the scorpion Scorpio maurus palmatus? SUMMARY ANSWER: We identified a potent disulfide-rich peptide (DRP) of 73 amino acids that significantly improved the motility of fresh and frozen-thawed sperm in different mammalian species, including human, and improved fertilization outcome in mouse IVF experiments. WHAT IS KNOWN ALREADY: Any disturbance of sperm motility has a strong impact on fertilization and can lead to subfertility or infertility...
December 8, 2016: Molecular Human Reproduction
https://www.readbyqxmd.com/read/27931992/the-attitudes-of-primary-healthcare-providers-towards-web-based-training-on-public-health-services-in-rural-china-a-cross-sectional-study
#6
X X Zhan, Z X Zhang, F Sun, W J Peng, H Zhang, W R Yan
OBJECTIVES: To explore the attitudes of primary healthcare workers, including township public health workers (TPHWs) and village doctors (ViDs), towards web-based training on basic public health services (BPHS) and to examine the factors influencing their attitudes. STUDY DESIGN: Cross-sectional study. METHODS: Questionnaires addressing training status, needs, and attitudes towards web-based public health training were administered to 2768 primary healthcare workers from May to September 2013...
December 2016: Public Health
https://www.readbyqxmd.com/read/27929508/development-of-a-universal-medical-x-ray-imaging-phantom-prototype
#7
Annemari Groenewald, Willem A Groenewald
Diagnostic X-ray imaging depends on the maintenance of image quality that allows for proper diagnosis of medical conditions. Maintenance of image quality requires quality assurance programs on the various X-ray modalities, which consist of pro-jection radiography (including mobile X-ray units), fluoroscopy, mammography, and computed tomography (CT) scanning. Currently a variety of modality-specific phantoms are used to perform quality assurance (QA) tests. These phantoms are not only expensive, but suitably trained personnel are needed to successfully use them and interpret the results...
November 8, 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/27929507/evaluation-of-digital-radiography-practice-using-exposure-index-tracking
#8
Alexander W Scott, Yifang Zhou, Janet Allahverdian, Jessica L Nute, Christina Lee
Some digital radiography (DR) detectors and software allow for remote download of exam statistics, including image reject status, body part, projection, and exposure index (EI). The ability to have automated data collection from multiple DR units is conducive to a quality control (QC) program monitoring institutional radiographic exposures. We have implemented such a QC program with the goal to identify outliers in machine radiation output and opportunities for improvement in radiation dose levels. We studied the QC records of four digital detectors in greater detail on a monthly basis for one year...
November 8, 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/27929493/application-programming-in-c-environment-with-recorded-user-software-interactions-and-its-application-in-autopilot-of-vmat-imrt-treatment-planning
#9
Henry Wang, Lei Xing
An autopilot scheme of volumetric-modulated arc therapy (VMAT)/intensity-modulated radiation therapy (IMRT) planning with the guidance of prior knowl-edge is established with recorded interactions between a planner and a commercial treatment planning system (TPS). Microsoft (MS) Visual Studio Coded UI is applied to record some common planner-TPS interactions as subroutines. The TPS used in this study is a Windows-based Eclipse system. The interactions of our application program with Eclipse TPS are realized through a series of subrou-tines obtained by prerecording the mouse clicks or keyboard strokes of a planner in operating the TPS...
November 8, 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/27928658/analog-computer-aided-detection-cad-information-can-be-more-effective-than-binary-marks
#10
Corbin A Cunningham, Trafton Drew, Jeremy M Wolfe
In socially important visual search tasks, such as baggage screening and diagnostic radiology, experts miss more targets than is desirable. Computer-aided detection (CAD) programs have been developed specifically to improve performance in these professional search tasks. For example, in breast cancer screening, many CAD systems are capable of detecting approximately 90% of breast cancer, with approximately 0.5 false-positive detections per image. Nevertheless, benefits of CAD in clinical settings tend to be small (Birdwell, 2009) or even absent (Meziane et al...
December 7, 2016: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/27926807/evaluation-of-a-national-e-mentoring-program-for-ethnically-diverse-student-nurse-midwives-and-student-midwives
#11
Maria Valentin-Welch
INTRODUCTION: The US racial profile is changing rapidly, yet the nursing and midwifery professions are not evolving accordingly. The lack of racial and ethnic diversity within these health professions negatively affects efforts to eliminate persistent health disparities. To address this issue, the Midwives of Color Committee (MOCC) of the American College of Nurse-Midwives (ACNM) created a national online mentoring program in 2011 to support midwifery students of color. An evaluation of the program is reported here...
November 2016: Journal of Midwifery & Women's Health
https://www.readbyqxmd.com/read/27925701/effect-of-precompression-on-the-power-doppler-assessment-of-breast-lesion-vascularity
#12
Robert DeVita, Richard G Barr
OBJECTIVES: To evaluate the effect of precompression on power Doppler visualization of blood flow in breast masses. METHODS: This Institutional Review Board-approved and Health Insurance Portability and Accountability Act-compliant study evaluated 30 patients with breast masses (16 benign and 14 malignant) undergoing ultrasound-guided breast biopsy. A computational mathematics program was used to calculate the number of color pixels in a region of interest at various degrees of compression of the breast by the transducer...
November 30, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/27925486/real-talk-developing-a-computer-delivered-sexual-health-program-for-black-men-who-have-sex-with-men
#13
Charles Klein, Carmela Lomonaco
HIV disproportionately affects Black men who have sex with men (MSM), yet there are few evidence-based programs that respond to the diverse realities of Black MSM communities. This article examines the development of Real Talk, a new harm reduction-based, sexual health intervention for Black MSM. We first analyze the key themes from our formative research: (1) stigma, discrimination, and intersectionalities in the lives of Black MSM, (2) the importance of safe spaces and community provided by health promotion programs, and (3) moving beyond condoms in sexual health messaging...
December 2016: AIDS Education and Prevention: Official Publication of the International Society for AIDS Education
https://www.readbyqxmd.com/read/27924446/educational-encounters-of-the-third-kind
#14
Gonzalo Génova, M Rosario González
An engineer who becomes an educator in a school of software engineering has the mission to teach how to design and construct software systems, therein applying his or her knowledge and expertise. However, due to their engineering background, engineers may forget that educating a person is not the same as designing a machine, since a machine has a well-defined goal, whilst a person is capable to self-propose his or her own objectives. The ethical implications are clear: educating a free person must leave space for creativity and self-determination in his or her own discovery of the way towards personal and professional fulfillment, which cannot consist only in achieving goals selected by others...
December 6, 2016: Science and Engineering Ethics
https://www.readbyqxmd.com/read/27924273/molecular-dynamics-analysis-to-evaluate-docking-pose-prediction
#15
Takako Sakano, Md Iqbal Mahamood, Takefumi Yamashita, Hideaki Fujitani
The accurate prediction of a ligand-protein complex structure is important for computer-assisted drug development. Although many docking methods have been developed over the last three decades, the success of binding structure prediction remains greatly limited. The purpose of this study was to demonstrate the usefulness of molecular dynamics (MD) simulation in assessing a docking pose predicted using a docking program. If the predicted pose is not unstable in an aqueous environment, MD simulation equilibrates the system and removes the ligand from the predicted position...
2016: Biophysics and Physicobiology
https://www.readbyqxmd.com/read/27924239/key-strike-forces-and-their-relation-to-high-level-of-musculoskeletal-symptoms
#16
Yafa Levanon, Amit Gefen, Yehuda Lerman, Sigal Portnoy, Navah Z Ratzon
BACKGROUND: This study aimed to investigate the relation between key strike forces and musculoskeletal symptoms (MSS). Moreover, this study presents a key strike force measurement method to be used in a workplace setting. The correlation between key strike force characteristics and MSS was previously studied, but the measurement methods used either a single-key switch or force platforms applied under the keyboard. Most of the studies were conducted in a laboratory setting. The uniqueness of measurement methods in the current study is their ability to measure forces applied to a specific key in a workplace setting and to provide more information about specific key strike forces during typing...
December 2016: Safety and Health At Work
https://www.readbyqxmd.com/read/27924018/disgenet-a-comprehensive-platform-integrating-information-on-human-disease-associated-genes-and-variants
#17
Janet Piñero, Àlex Bravo, Núria Queralt-Rosinach, Alba Gutiérrez-Sacristán, Jordi Deu-Pons, Emilio Centeno, Javier García-García, Ferran Sanz, Laura I Furlong
The information about the genetic basis of human diseases lies at the heart of precision medicine and drug discovery. However, to realize its full potential to support these goals, several problems, such as fragmentation, heterogeneity, availability and different conceptualization of the data must be overcome. To provide the community with a resource free of these hurdles, we have developed DisGeNET (http://www.disgenet.org), one of the largest available collections of genes and variants involved in human diseases...
October 19, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27923440/parent-administered-computer-assisted-tutoring-targeting-letter-sound-knowledge-evaluation-via-multiple-baseline-across-three-preschool-students
#18
Matthew R DuBois, Robert J Volpe, Matthew K Burns, Jessica A Hoffman
Knowledge of letters sounds has been identified as a primary objective of preschool instruction and intervention. Despite this designation, large disparities exist in the number of letter sounds children know at school entry. Enhancing caregivers' ability to teach their preschool-aged children letter sounds may represent an effective practice for reducing this variability and ensuring that more children are prepared to experience early school success. This study used a non-concurrent multiple-baseline-across-participants design to evaluate the effectiveness of caregivers (N=3) delivering a computer-assisted tutoring program (Tutoring Buddy) targeting letter sound knowledge to their preschool-aged children...
December 2016: Journal of School Psychology
https://www.readbyqxmd.com/read/27923277/reaction-time-for-processing-visual-stimulus-in-a-computer-assisted-rehabilitation-environment
#19
Yerly Sanchez, David Pinzon, Bin Zheng
PURPOSE: To examine the reaction time when human subjects process information presented in the visual channel under both a direct vision and a virtual rehabilitation environment when walking was performed. METHOD: Visual stimulus included eight math problems displayed on the peripheral vision to seven healthy human subjects in a virtual rehabilitation training (computer-assisted rehabilitation environment (CAREN)) and a direct vision environment. Subjects were required to verbally report the results of these math calculations in a short period of time...
December 7, 2016: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/27923276/association-between-maternal-circulating-25-hydroxyvitamin-d-concentration-and-placental-volume-in-the-first-trimester
#20
Çiğdem Yayla Abide, Meryem Kurek Eken, Işıl Turan, Enis Özkaya, Oya Pekin, Ateş Karateke
OBJECTIVES: We aimed to assess placental volume and placental mean gray value in vitamin D deficiency and healthy placentas in the first trimester of pregnancy using three-dimensional (3D) ultrasonography and Virtual Organ Computer-aided Analysis (VOCAL). METHODS: This prospective cross sectional study comprised 274 patients, divided into two groups according to the presence or absence of vitamin D deficiency (<20ng/ml deficient, n = 153,>20 ng/ml not deficient, n= 121) in the first trimester of pregnancy...
December 6, 2016: Journal of Maternal-fetal & Neonatal Medicine
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