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https://www.readbyqxmd.com/read/28806094/the-relationship-of-throwing-arm-mechanics-and-elbow-varus-torque-within-subject-variation-for-professional-baseball-pitchers-across-82-000-throws
#1
Christopher L Camp, Travis G Tubbs, Glenn S Fleisig, Joshua S Dines, David M Dines, David W Altchek, Brittany Dowling
BACKGROUND: Likely due to the high level of strain exerted across the elbow during the throwing motion, elbow injuries are on the rise in baseball. To identify at-risk athletes and guide postinjury return-to-throw programs, a better understanding of the variables that influence elbow varus torque is desired. PURPOSE: To describe the within-subject relationship between elbow varus torque and arm slot and arm rotation in professional baseball pitchers. STUDY DESIGN: Descriptive laboratory study...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28806009/regional-infant-and-child-mortality-review-committee-2015-final-report
#2
Ann L Wilson, Jim Sideras, Brad Randall
The Regional Infant and Child Mortality Review Committee serves 10 counties in southeastern South Dakota and aims to use its reviews to prevent future loss of life during childhood. In 2015, the committee reviewed 24 deaths (compared to 32 cases in 2013 and 25 cases in 2014). Consistent with observations made in previous years, in 2015 all infants (n=7) who died during sleep did so with risks present in the sleep environment. Progress in decreasing these infant deaths in the region is not being observed, and in fact, may even be deteriorating...
October 2016: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28804993/influence-of-surgical-gloves-on-haptic-perception-thresholds
#3
Christian Hatzfeld, Sarah Dorsch, Carsten Neupert, Mario Kupnik
BACKGROUND: Impairment of haptic perception by surgical gloves could reduce requirements on haptic systems for surgery. While grip forces and manipulation capabilities were not impaired in previous studies, no data is available for perception thresholds. METHODS: Absolute and differential thresholds (20 dB above threshold) of 24 subjects were measured for frequencies of 25 and 250 Hz with a Ψ-method. Effects of wearing a surgical glove, moisture on the contact surface and subject's experience with gloves were incorporated in a full-factorial experimental design...
August 14, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28804653/college-students-perceptions-of-worry-and-parent-beliefs-associations-with-behaviors-to-prevent-sun-exposure
#4
Robert A Yockey, Laura A Nabors, Oladunni Oluwoye, Kristen Welker, Angelica M Hardee
More research is needed to understand how attitudes impact behaviors that afford sun protection. The current study examined the impact of students' perceptions of parental beliefs about sun exposure and its influence on their practiced sun protection behaviors and worry about sun exposure. Participants were college students (N = 462) at a large Midwestern university. They completed a survey to examine their perceptions of risks and messages about sun exposure and sun exposure behaviors. Results indicated that gender and students' perceptions of parental beliefs about sun exposure were related to sun protection behaviors and their own worry over sun exposure...
2017: Journal of Skin Cancer
https://www.readbyqxmd.com/read/28804593/an-innovative-sealed-shoe-to-off-load-and-heal-diabetic-forefoot-ulcers-a-feasibility-study
#5
Gustav Jarl, Roy Tranberg
Background: Non-removable knee-high devices are the gold standard to treat diabetic foot ulcers located on the plantar forefoot, but they immobilize the ankle, which restricts daily life activities and has negative effects on joint functioning. Objective: To investigate the feasibility of sealing a therapeutic shoe to off-load and heal diabetic forefoot ulcers. Design: A case series of seven men with type 2 diabetes and a metatarsal head ulcer were prescribed therapeutic shoes and custom-made insoles. The shoe was sealed with a plastic band...
2017: Diabetic Foot & Ankle
https://www.readbyqxmd.com/read/28803815/patient-specific-contact-stress-does-not-predict-polyethylene-wear-rate-in-a-specific-pressfit-cup
#6
Georg Matziolis, Linda Krakow, Frank Layher, Klaus Sander, Joerg Bossert, Steffen Brodt
BACKGROUND: The most common reason for revision total hip arthroplasty remains polyethylene wear. Development dysplasia of the hip and revision situations requires a conscious compromise of implant position. The surgeon should know about the consequence on wear via a possible change in hip contact force. The objective of this study is to investigate whether annual wear is dependent on hip contact force. METHODS: Forty-five inserts (DuraLoc, DePuy) that were explanted in our department were included...
July 25, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28803468/functional-multi-nanolayer-coatings-of-amorphous-carbon-tungsten-carbide-with-exceptional-mechanical-durability-and-corrosion-resistance
#7
Narguess Nemati, Mansoor Bozorg, Oleksiy V Penkov, Dong-Gap Shin, Asghar Sadighzadeh, Dae-Eun Kim
A novel functional multilayer coating with periodically stacked nanolayers of amorphous carbon (a:C)/ tungsten carbide (WC) and an adhesion layer of chromium (Cr) was deposited on 304 stainless steel using a dual magnetron sputtering technique. Through process optimization, highly densified coatings with high elasticity and shear moduli, excellent wear resistance, as well as minimal susceptibility to corrosive and caustic media could be acquired. The structural and mechanical properties of the optimized coatings were studied in detail by a variety of techniques...
August 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28803466/deciphering-the-fluorine-code-the-many-hats-fluorine-wears-in-a-protein-environment
#8
Allison Ann Berger, Jan-Stefan Völler, Nediljko Budisa, Beate Koksch
Deciphering the fluorine code is how we describe not only the focus of this Account, but also the systematic approach to studying the impact of fluorine's incorporation on the properties of peptides and proteins used by our groups and others. The introduction of fluorine has been shown to impart favorable, but seldom predictable, properties to peptides and proteins, but up until about two decades ago the outcomes of fluorine modification of peptides and proteins were largely left to chance. Driven by the motivation to extend the application of the unique properties of the element fluorine from medicinal and agro chemistry to peptide and protein engineering we have established extensive research programs that enable the systematic investigation of effects that accompany the introduction of fluorine into this class of biopolymers...
August 12, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28803215/structural-tribological-and-mechanical-properties-of-the-hind-leg-joint-of-a-jumping-insect-using-katydids-to-inform-bioinspired-lubrication-systems
#9
Jun Kyun Oh, Spencer T Behmer, Richelle Marquess, Cengiz Yegin, Ethan A Scholar, Mustafa Akbulut
This study investigates the structural properties of the hind leg femur-tibia joint in adult katydids (Orthoptera: Tettigoniidae), including its tribological and mechanical properties. It is of particular interest because the orthopteran (e.g., grasshoppers, crickets, and katydids) hind leg is highly specialized for jumping. We show that the katydid hind leg femur-tibia joint had unique surfaces and textures, with a friction coefficient (μ) at its coupling surface of 0.053 ± 0.001. Importantly, the sheared surfaces at this joint showed no sign of wear or damage, even though it had undergone thousands of external shearing cycles...
August 9, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28802435/gait-characteristics-in-women-s-safety-shoes
#10
Kanako Goto, Kaoru Abe
Although workers in Japan are required to wear safety footwear, there is concern about occupational accidents that occur when wearing safety shoes. This study aimed to analyze the effect of wearing hardsoled safety shoes on both spatiotemporal gait characteristics and the muscle activity in the lower extremities. Seventeen young women participated in this study. A 5-m gait trial and a surface electromyography trial were conducted while the women walked in either safety shoes or sports shoes. Paired t-tests were performed to analyze the differences in gait characteristics when walking in the two different pairs of shoes...
November 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28802431/ankle-restrictive-firefighting-boots-alter-the-lumbar-biomechanics-during-landing-tasks
#11
Vy Vu, Anthony Walker, Nick Ball, Wayne Spratford
Firefighters incur high incidences of lower back and body injuries. Firefighting boots, with specific design requirements, have been shown to reduce ankle range of motion. This reduction has been associated with impaired force dissipation and lower body kinematic alterations. Thus, the aim of this study was to determine the relationship between firefighting boots, lumbar biomechanics and load carriage during landing. Our data indicates that when wearing firefighting boots, lumbar forces increased and kinematics changed in frontal and transverse planes...
November 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28801304/how-accurate-is-your-activity-tracker-a-comparative-study-of-step-counts-in-low-intensity-physical-activities
#12
Parastoo Alinia, Chris Cain, Ramin Fallahzadeh, Armin Shahrokni, Diane Cook, Hassan Ghasemzadeh
BACKGROUND: As commercially available activity trackers are being utilized in clinical trials, the research community remains uncertain about reliability of the trackers, particularly in studies that involve walking aids and low-intensity activities. While these trackers have been tested for reliability during walking and running activities, there has been limited research on validating them during low-intensity activities and walking with assistive tools. OBJECTIVE: The aim of this study was to (1) determine the accuracy of 3 Fitbit devices (ie, Zip, One, and Flex) at different wearing positions (ie, pants pocket, chest, and wrist) during walking at 3 different speeds, 2...
August 11, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28801178/impact-of-head-and-neck-radiotherapy-on-the-mechanical-behavior-of-composite-resins-and-adhesive-systems-a-systematic-review
#13
REVIEW
Cristhian Camilo Madrid Troconis, Alan Roger Santos-Silva, Thaís Bianca Brandão, Marcio Ajudarte Lopes, Mario Fernando de Goes
OBJECTIVES: To analyze the evidence regarding the impact of head and neck radiotherapy (HNRT) on the mechanical behavior of composite resins and adhesive systems. METHODS: Searches were conducted on PubMed, Embase, Scopus and ISI Web of Science databases using "Radiotherapy", "Composite resins" and "Adhesive systems" as keywords. Selected studies were written in English and assessed the mechanical behavior of composite resins and/or adhesive systems when bonding procedure was conducted before and/or after a maximum radiation dose ≥50Gy, applied under in vitro or in vivo conditions...
August 8, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28800084/the-dry-sliding-wear-properties-of-nano-sized-ticp-al-cu-composites-at-elevated-temperatures
#14
Wei-Si Tian, Qing-Long Zhao, Chuan-Jiang Zhao, Feng Qiu, Qi-Chuan Jiang
Nano-sized ceramic particle reinforced aluminum composites exhibit excellent room-temperature mechanical properties. However, there is limited research on the dry sliding wear behavior of those composites at elevated temperatures, which should be one of the major concerns on elevated temperature applications. Here the Al-Cu composites reinforced with nano-sized TiCp were fabricated. The dry sliding wear behaviors of the nano-sized TiCp/Al-Cu composites at various temperatures (140-220 °C) and loads (10-40 N) with different TiCp contents were studied, and the results showed that the nanocomposites exhibited superior wear resistance...
August 11, 2017: Materials
https://www.readbyqxmd.com/read/28799960/critical-contact-lens-oxygen-transmissibility-and-tear-lens-oxygen-tension-to-preclude-corneal-neovascularization
#15
Karen K Yeung, Helen J Yang, Andrew L Nguyen, Barry A Weissman
OBJECTIVE: The purpose of this study is to determine the peripheral oxygen transmissibility (pDk/t) and respective central oxygen transmissibility (cDk/t) in soft contact lenses (SCLs) which might preclude SCL-driven corneal neovascularization (NV) in healthy myopic SCL users. METHODS: Twenty subjectively successful SCL-wearing patients who presented with asymptomatic but active peripheral corneal NV (not ghost vessels) were recruited as study patients. Twenty-one patients who did not have NV were similarly recruited as controls...
August 9, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28799335/structure-and-mechanical-properties-of-polybutadiene-thin-films-bound-to-surface-modified-carbon-interface
#16
Koichiro Hori, Norifumi L Yamada, Yoshihisa Fujii, Tomomi Masui, Hiroyuki Kishimoto, Hideki Seto
The structure and mechanical properties of polybutadiene (PB) film on bare and surface-modified carbon films were examined. There was an interfacial layer of PB near the carbon layer whose density was higher (lower) than that of the bulk material on the hydrophobic (hydrophilic) carbon surface. To glean information about the structure and mechanical properties of PB at the carbon interface, a residual layer (RL) adhering on the carbon surface, which was considered to be a model of "bound rubber layer," was obtained by rinsing the PB film with toluene...
August 11, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28799200/simple-tests-compare-well-with-a-hand-held-audiometer-for-hearing-loss-screening-in-primary-care
#17
William J Strawbridge, Margaret I Wallhagen
OBJECTIVES: To compare hearing loss screening results of four simple tests with those of hand-held audiometry. DESIGN: Cross-sectional study of individuals screened during intake for physicals and other routine procedures. SETTING: Two primary care clinics in the San Francisco Bay area. PARTICIPANTS: Older adults not wearing hearing aids (N = 125, mean age 72.9, 63% female). MEASUREMENTS: Direct question about hearing loss, indirect question, finger-rub test, whisper test, and audiometric results using a hand-held audiometer...
August 11, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28798008/activity-recognition-in-individuals-walking-with-assistive-devices-the-benefits-of-device-specific-models
#18
Luca Lonini, Aakash Gupta, Susan Deems-Dluhy, Shenan Hoppe-Ludwig, Konrad Kording, Arun Jayaraman
BACKGROUND: Wearable sensors gather data that machine-learning models can convert into an identification of physical activities, a clinically relevant outcome measure. However, when individuals with disabilities upgrade to a new walking assistive device, their gait patterns can change, which could affect the accuracy of activity recognition. OBJECTIVE: The objective of this study was to assess whether we need to train an activity recognition model with labeled data from activities performed with the new assistive device, rather than data from the original device or from healthy individuals...
August 10, 2017: JMIR Rehabil Assist Technol
https://www.readbyqxmd.com/read/28797867/preventing-early-postoperative-arm-swelling-and-lymphedema-manifestation-by-compression-sleeves-after-axillary-lymph-node-interventions-in-breast-cancer-patients-a-randomized-controlled-trial
#19
Katarzyna Ochalek, Tomasz Gradalski, Hugo Partsch
CONTEXT: Breast cancer related lymphedema (BCRL) remains one of the major long-term complications after surgery. Many reports showed the effectiveness of compression in BCRL treatment but randomized controlled trials evaluating compression garments for postoperative prevention are lacking. OBJECTIVES: The aim of the study was to evaluate the potential role of light arm compression sleeves for reducing the incidence of early postoperative swelling and of breast cancer related arm lymphedema...
August 7, 2017: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/28797622/relationships-between-respiratory-parameters-exercise-capacity-and-psychosocial-factors-in-people-with-chronic-obstructive-pulmonary-disease
#20
T O Awotidebe, O F Awopeju, L A Bisiriyu, R N Ativie, K I Oke, R A Adedoyin, O D Olusola, G E Erhabor
BACKGROUND: Chronic obstructive pulmonary disease (COPD) affects respiratory functioning and psychosocial factors. However, little is known about perceived ability of people with COPD to engage in a regular exercise program. This study assessed respiratory parameters, exercise capacity, psychosocial factors and their relations in people with COPD. METHODS: This cross-sectional study involved patients with COPD recruited from a Nigerian university teaching hospital...
August 7, 2017: Annals of Physical and Rehabilitation Medicine
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