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https://www.readbyqxmd.com/read/29149724/peri-ultrasound-modeling-for-surface-wave-propagation
#1
Mohammad Hadi Hafezi, Tribikram Kundu
The interaction between surface wave and a surface breaking crack is studied using a novel fast modeling tool called peri-ultrasound that can model both linear and nonlinear ultrasonic response. This modeling approach is based on peridynamic theory. In this study, the surface wave is modeled by applying a triangular pulse excitation function on the surface of a large structure. The particle movements are simulated on both sides of the surface crack to investigate transmitted and reflected fields. This investigation shows that: (1) the computed amplitude spectra of the Rayleigh wave agrees with the experimental observation; and (2) the structure containing a surface breaking crack shows noticeable increase in its nonlinear behavior...
November 7, 2017: Ultrasonics
https://www.readbyqxmd.com/read/29149594/conversion-of-bim-bh3-from-activator-to-inhibitor-of-bak-through-structure-based-design
#2
Jason M Brouwer, Ping Lan, Angus D Cowan, Jonathan P Bernardini, Richard W Birkinshaw, Mark F van Delft, Brad E Sleebs, Adeline Y Robin, Ahmad Wardak, Iris K Tan, Boris Reljic, Erinna F Lee, W Douglas Fairlie, Melissa J Call, Brian J Smith, Grant Dewson, Guillaume Lessene, Peter M Colman, Peter E Czabotar
Certain BH3-only proteins transiently bind and activate Bak and Bax, initiating their oligomerization and the permeabilization of the mitochondrial outer membrane, a pivotal step in the mitochondrial pathway to apoptosis. Here we describe the first crystal structures of an activator BH3 peptide bound to Bak and illustrate their use in the design of BH3 derivatives capable of inhibiting human Bak on mitochondria. These BH3 derivatives compete for the activation site at the canonical groove, are the first engineered inhibitors of Bak activation, and support the role of key conformational transitions associated with Bak activation...
November 16, 2017: Molecular Cell
https://www.readbyqxmd.com/read/29149560/the-extended-zinc-amber-force-field-ezaff
#3
Zhuoqin Yu, Pengfei Li, Kenneth M Merz
An empirical approach based on the previously developed zinc AMBER force field (ZAFF) is proposed for the determination of the parameters for bonds and angles involving zinc. We call it the extended ZAFF (EZAFF) model because the original ZAFF model was only formulated for 4-coordinated systems, while EZAFF additionally can tackle 5- and 6-coordinated systems. Tests were carried out for 6 metalloproteins and 5 organometallic compounds with different coordination spheres. Results validated the reliability of the current model to handle a variety of zinc containing complexes...
November 17, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29149404/the-translational-controlled-tumour-protein-tctp-biological-functions-and-regulation
#4
Ulrich-Axel Bommer
The Translational Controlled Tumour Protein TCTP (gene symbol TPT1, also called P21, P23, Q23, fortilin or histamine-releasing factor, HRF) is a highly conserved protein present in essentially all eukaryotic organisms and involved in many fundamental cell biological and disease processes. It was first discovered about 35 years ago, and it took an extended period of time for its multiple functions to be revealed, and even today we do not yet fully understand all the details. Having witnessed most of this history, in this chapter, I give a brief overview and review the current knowledge on the structure, biological functions, disease involvements and cellular regulation of this protein...
2017: Results and Problems in Cell Differentiation
https://www.readbyqxmd.com/read/29149327/focused-time-lapse-analysis-reveals-novel-aspects-of-human-fertilization-and-suggests-new-parameters-of-embryo-viability
#5
G Coticchio, M Mignini Renzini, P V Novara, M Lain, E De Ponti, D Turchi, R Fadini, M Dal Canto
STUDY QUESTION: Can focused application of time-lapse microscopy (TLM) lead to a more detailed map of the morphokinetics of human fertilization, revealing novel or neglected aspects of this process? SUMMARY ANSWER: Intensive harnessing of TLM reveals novel or previously poorly characterised phenomena of fertilization, such as a cytoplasmic wave (CW) preceding pronuclear formation and kinetics of pronuclear chromatin polarization, thereby suggesting novel non-invasive biomarkers of embryo quality...
November 15, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29149319/from-bouncing-back-to-nurturing-emergence-reframing-the-concept-of-resilience-in-health-systems-strengthening
#6
Edwine W Barasa, Keith Cloete, Lucy Gilson
Recent health system shocks such as the Ebola disease outbreak have focused global health attention on the notion of resilient health systems. In this commentary, we reflect on the current framing of the concept of resilience in health systems discourse and propose a reframing. Specifically, we propose that: (1) in addition to sudden shocks, health systems face the ongoing strain of multiple factors. Health systems need the capacity to continue to deliver services of good quality and respond effectively to wider health challenges...
November 1, 2017: Health Policy and Planning
https://www.readbyqxmd.com/read/29149316/use-of-information-and-communication-technologies-in-the-formal-and-informal-health-system-responses-to-the-2015-nepal-earthquakes
#7
Olivia Crane, Julie Balen, Bhimsen Devkota, Sudha Ghimire, Simon Rushton
Information and Communication Technologies (ICTs) are increasingly recognized for their potential contributions to health service delivery in Low-and Middle-Income Countries (LMICs). As well as playing a role in improving the provision of health services under everyday 'normal' circumstances, ICTs can also be important in preparing for, mitigating, responding to and recovering from disasters. This research explores the use of ICTs in a natural disaster situation in Nepal, a country affected by a series of strong earthquakes in 2015...
November 1, 2017: Health Policy and Planning
https://www.readbyqxmd.com/read/29149262/a-food-environments-feedback-system-foodback-for-empowering-citizens-and-change-agents-to-create-healthier-community-food-places
#8
Stefanie Vandevijvere, Rachel Williams, Essa Tawfiq, Boyd Swinburn
This study developed a systems-based approach (called FoodBack) to empower citizens and change agents to create healthier community food places. Formative evaluations were held with citizens and change agents in six diverse New Zealand communities, supplemented by semi-structured interviews with 85 change agents in Auckland and Hamilton in 2015-2016. The emerging system was additionally reviewed by public health experts from diverse organizations. A food environments feedback system was constructed to crowdsource key indicators of the healthiness of diverse community food places (i...
November 14, 2017: Health Promotion International
https://www.readbyqxmd.com/read/29149249/human-accelerated-regions-and-other-human-specific-sequence-variations-in-the-context-of-evolution-and-their-relevance-for-brain-development
#9
Anastasia Levchenko, Alexander Kanapin, Anastasia Samsonova, Raul Gainetdinov
The review discusses, in a format of a timeline, the studies of different types of genetic variants, present in Homo sapiens, but absent in all other primate, mammalian or vertebrate species, tested so far. The main characteristic of these variants is that they are found in regions of high evolutionary conservation. These sequence variations include single nucleotide substitutions (called human accelerated regions), deletions and segmental duplications. The rationale for finding such variations in the human genome is that they could be responsible for traits, specific to our species, of which the human brain is the most remarkable...
November 14, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29149194/understanding-linkage-to-care-with-hiv-self-test-approach-in-lusaka-zambia-a-mixed-method-approach
#10
Jenala Chipungu, Samuel Bosomprah, Arianna Zanolini, Harsha Thimurthy, Roma Chilengi, Anjali Sharma, Charles B Holmes
INTRODUCTION: HIV self-testing (HIVST) is a novel approach designed to assist in achieving the goal of at least 90% of the population that learn their HIV status. A self-test user with a positive test is required to visit a clinic to link into HIV care, yet little is known about patient preferences for linkage strategies. We examined the intention to link to care amongst potential HIVST users and the suitability of three linkage to care strategies in Lusaka Province, Zambia. METHODS: We conducted a representative cross sectional survey of 1,617 individuals aged 16-49 years old in Lusaka Province...
2017: PloS One
https://www.readbyqxmd.com/read/29149133/computer-based-exercise-program-effects-of-a-12-week-intervention-on-mood-and-fatigue-in-pediatric-patients-with-cancer%C3%A2
#11
Anna-Maria Platschek, Laura Kehe, Vera Abeln, Frank Berthold, Thorsten Simon, Heiko Strüder
BACKGROUND: Increasing rates of survival present a new set of physical and psychological challenges for children dealing with side effects during cancer treatment. Physical activity has been shown to be an effective strategy to reduce several side effects.
. OBJECTIVES: The purpose of this pilot study was to determine the benefits of a 12-week computer-based exercise intervention on perceived physical, motivational, and fatigue syndrome and psychological state...
December 1, 2017: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/29149114/-calls-due-to-suicidal-behaviour-made-to-the-prehospital-emergency-department-in-m%C3%A3-laga-characteristics-and-associated-factors
#12
M Jiménez-Hernández, S Castro-Zamudio, J Guzmán Parra, A I Martínez-García, C Guillén-Benítez, B Moreno-Küstner
BACKGROUND: Suicidal behaviour (fatal and non-fatal) has become a serious public health problem in many countries. The aim of the study was to describe the differential characteristics of emergency calls due to suicidal behaviour made to the Emergency Coordinating Centre (CCUE) in the province of Málaga, in comparison with calls due to physical or psychiatric problems. METHODS: Retrospective observational study of the calls recorded in the database of the Public Company for Emergency Health during one year...
November 17, 2017: Anales del Sistema Sanitario de Navarra
https://www.readbyqxmd.com/read/29149040/a-coap-based-network-access-authentication-service-for-low-power-wide-area-networks-lo-coap-eap
#13
Dan Garcia-Carrillo, Rafael Marin-Lopez, Arunprabhu Kandasamy, Alexander Pelov
The Internet-of-Things (IoT) landscape is expanding with new radio technologies. In addition to the Low-Rate Wireless Personal Area Network (LR-WPAN), the recent set of technologies conforming the so-called Low-Power Wide Area Networks (LP-WAN) offers long-range communications, allowing one to send small pieces of information at a reduced energy cost, which promotes the creation of new IoT applications and services. However, LP-WAN technologies pose new challenges since they have strong limitations in the available bandwidth...
November 17, 2017: Sensors
https://www.readbyqxmd.com/read/29148837/prostitution-stigma-and-its-effect-on-the-working-conditions-personal-lives-and-health-of-sex-workers
#14
Cecilia Benoit, S Mikael Jansson, Michaela Smith, Jackson Flagg
Researchers have shown that stigma is a fundamental determinant of behavior, well-being, and health for many marginalized groups, but sex workers are notably absent from their analyses. This article aims to fill the empirical research gap on sex workers by reviewing the mounting evidence of stigmatization attached to sex workers' occupation, often referred to as "prostitution" or "whore" stigma. We give special attention to its negative effect on the working conditions, personal lives, and health of sex workers...
November 17, 2017: Journal of Sex Research
https://www.readbyqxmd.com/read/29148773/in-situ-nondestructive-analysis-of-kalanchoe-pinnata-leaf-surface-structure-by-polarization-modulation-infrared-reflection-absorption-spectroscopy
#15
Tetsuya Hama, Akira Kouchi, Naoki Watanabe, Shinichi Enami, Takafumi Shimoaka, Takeshi Hasegawa
The outermost surface of the leaves of land plants is covered with a lipid membrane called the cuticle that protects against various stress factors. Probing the molecular-level structure of the intact cuticle is highly desirable for understanding its multifunctional properties. We report the in situ characterization of the surface structure of Kalanchoe pinnata leaves using polarization-modulation infrared reflection-absorption spectroscopy (PM-IRRAS). Without sample pretreatment, PM-IRRAS measures the IR spectra of the leaf cuticle of a potted K...
November 17, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29148129/development-of-functional-electrical-stimulation-rowing-the-rowstim-series
#16
Brian Andrews, Robin Gibbons, Garry Wheeler
Potentially, functional electrical stimulation (FES)-assisted exercise may have an important therapeutic role in reducing comorbidities associated with spinal cord injury (SCI). Here, we present an overview of these secondary life-threatening conditions, discuss the rationale behind the development of a hybrid exercise called FES rowing, and describe our experience in developing FES rowing technology. FES rowing and sculling are unique forms of adaptive rowing for those with SCI. The paralyzed leg musculature is activated by multiple channels of electrical pulses delivered via self-adhesive electrodes attached to the skin...
November 2017: Artificial Organs
https://www.readbyqxmd.com/read/29148108/human-pegivirus-hpgv-infection-in-sub-saharan-africa-a-call-for-a-renewed-research-agenda
#17
REVIEW
Shivank Singh, Jason T Blackard
The human pegivirus (HPgV)-formerly GB virus C-has a beneficial impact on HIV disease progression that has been described in multiple studies. Given the high prevalence of HIV in sub-Saharan Africa and the continuing need to suppress HIV replication, this review provides a comprehensive overview of the existing data on HPgV infection in sub-Saharan Africa, with a particular focus on studies of prevalence and the circulating HPgV genotypes. This review also highlights the need for additional studies of HPgV conducted on the African continent and proposes a research agenda for evaluation of HPgV...
November 17, 2017: Reviews in Medical Virology
https://www.readbyqxmd.com/read/29148088/effectiveness-of-an-intensive-intervention-to-improve-lifestyles-in-subjects-with-intermediate-cardiovascular-risk-date-study-study-protocol-for-a-randomized-controlled-trial
#18
Natalia Sanchez-Aguadero, Sara Mora-Simon, Jose I Recio-Rodriguez, Rosario Alonso-Dominguez, Jesus Gonzalez-Sanchez, Cristina Martin-Martin, Manuel A Gomez-Marcos, Emiliano Rodriguez-Sanchez
AIM: To evaluate the effectiveness of an intensive intervention led by primary care nurses for lifestyle modification among subjects with intermediate cardiovascular risk. BACKGROUND: Cardiovascular diseases may be prevented by adopting healthy lifestyles. Interventions focused on populations at risk are more efficient than those aimed at the general population. More than 50 per cent of cardiovascular events occur in subjects with intermediate cardiovascular risk, but only a few studies have targeted this population...
November 17, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/29148001/an-arterioarterial-prosthetic-graft-as-an-alternative-option-for-haemodialysis-access-a-systematic-review
#19
Matthew J Grima, Bianca Vriens, Peter J Holt, Eric Chemla
INTRODUCTION: All arteriovenous fistula/grafts options should be exhausted before haemodialysis is carried out via central venous catheters (CVC). CVCs carry high morbidity and mortality risks and in some patients, the central veins could be exhausted. In these patients, an arterioarterial prosthetic loop (AAPL) or straight graft can be the only option for haemodialysis. A systematic review was thus carried out to look at the use of arterioarterial graft for haemodialysis, with regards to dialysis adequacy, complications, and patency rates...
November 10, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/29147964/diabetes-care-in-qatar-a-survey-of-pharmacists-activities-attitudes-and-knowledge
#20
Maguy Saffouh El Hajj, Safae E Abu Yousef, Meena Ali Basri
Background Diabetes mellitus is recognized as a major public health issue and is one of the top ten causes of death in Qatar. Objective To describe the activities, and attitudes of Qatar pharmacists toward diabetes, to measure their diabetes knowledge and to assess their perceived barriers for diabetes care. Setting Community and ambulatory pharmacies in Qatar. Method Study objectives were addressed in a cross sectional survey of community and ambulatory pharmacists in Qatar. A phone call explaining the study was made to all community and ambulatory pharmacists in Qatar...
November 17, 2017: International Journal of Clinical Pharmacy
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