Estimation of production trend of the depik, Rasbora tawarensis (Teleostei, Cyprinidae), in Lake Laut Tawar, Indonesia

The objective of the present study was to evaluate the production trend of the depik (Rasbora tawarensis) during the last two decades in Lake Laut Tawar. The production trend was examined based on the catch per unit efforts. The direct sampling, fishermen catches collection and fishermen interview were conducted to collect actual fish catches. The results showed that the depik, R. tawarensis production (indicated by the catch-per-unit effort (CPUE)) was seasonally dependent where the CPUE was higher in the rainy season compared to dry season. In addition, the CPUE was higher in the new moon according to lunar cycle. The production of depik in particular and fishes of Lake Laut Tawar in general are declining dramatically during the last two decades. The decrease in the water levels, destructive fishing gears, the presence of introduced species and pollution are the main reasons suggested for this phenomenon.</p

Assessment of Measures of Physical Activity of Children with Cerebral Palsy at Home and School: A Pilot Study

Home and school are important settings where children can accrue health promoting physical activity (PA). Little is known about the PA levels and associated environmental characteristics at home and school in children with cerebral palsy (CP). An observational tool - Behaviors of Eating and Activity for Children’s Health Evaluation System (BEACHES) - offers potential for providing information. Objective: To validate BEACHES against Actigraph accelerometer and to document PA of children with CP at a special residential school facility for children with physical disabilities. Methods: Five children with CP (2 girls, 3 boys; aged 9.82 ± 2.39 years) in Level I of the Gross Motor Function Classification System (GMFCS) participated. PA monitoring was conducted once a week during four consecutive weeks at morning recess at school and during after school hours at the children’s residence. Estimates of time spent being sedentary and being active were derived from the Actigraph and compared to estimates obtained with BEACHES. Results: Children’s PA observed using BEACHES was comparable to the Actigraph estimations. In general, children were more active at recess than after school and the physical locations assessed by BEACHES were associated with objectively measured PA time. Conclusion: This pilot study indicates that BEACHES appears to be a suitable measure of PA for children with CP in both home and school settings. Additional study with a larger and more diverse sample is recommended to verify the results

Physical activity for children in special school environment

&nbsp;Key Messages1. We assessed children&rsquo;s physical&nbsp;activity (PA) in structured (physical&nbsp;education) and unstructured&nbsp;(recess, lunch, before and after&nbsp;school) periods in special schools&nbsp;and examined its association&nbsp;with modifiable area contextual&nbsp;characteristics.2. Children with disabilities were not&nbsp;highly active, but were more active&nbsp;during recess and lunch periods&nbsp;than at other times including&nbsp;physical education classes.3. Areas were often not accessible&nbsp;during unstructured settings.&nbsp;Children were more active in areas&nbsp;when supervision and organised&nbsp;activities were provided.4. Providing an interactive game&nbsp;during free play did not significantly&nbsp;increase group&rsquo;s PA.5. Children&rsquo;s PA accrual is influenced&nbsp;by contextual characteristics of&nbsp;the school environment. There is a&nbsp;need to make areas more accessible&nbsp;and to use social marketing and&nbsp;programming to attract more users.&nbsp;School and health professionalsshould modify contextual&nbsp;characteristics by providing more&nbsp;direct supervision and organised&nbsp;activities during free play.</div

Nondestructive Measurement of Orbital Angular Momentum for an Electron Beam

Free electrons with a helical phase front, referred to as "twisted" electrons, possess an orbital angular momentum (OAM) and, hence, a quantized magnetic dipole moment along their propagation direction. This intrinsic magnetic moment can be used to probe material properties. Twisted electrons thus have numerous potential applications in materials science. Measuring this quantity often relies on a series of projective measurements that subsequently change the OAM carried by the electrons. In this Letter, we propose a nondestructive way of measuring an electron beam's OAM through the interaction of this associated magnetic dipole with a conductive loop. Such an interaction results in the generation of induced currents within the loop, which are found to be directly proportional to the electron's OAM value. Moreover, the electron experiences no OAM variations and only minimal energy losses upon the measurement, and, hence, the nondestructive nature of the proposed technique.Comment: 5 pages, 3 figures, and supplemental material that is comprised of text and 4 figure

Multiple Factorizations of Bivariate Linear Partial Differential Operators

We study the case when a bivariate Linear Partial Differential Operator (LPDO) of orders three or four has several different factorizations. We prove that a third-order bivariate LPDO has a first-order left and right factors such that their symbols are co-prime if and only if the operator has a factorization into three factors, the left one of which is exactly the initial left factor and the right one is exactly the initial right factor. We show that the condition that the symbols of the initial left and right factors are co-prime is essential, and that the analogous statement "as it is" is not true for LPDOs of order four. Then we consider completely reducible LPDOs, which are defined as an intersection of principal ideals. Such operators may also be required to have several different factorizations. Considering all possible cases, we ruled out some of them from the consideration due to the first result of the paper. The explicit formulae for the sufficient conditions for the complete reducibility of an LPDO were found also

Recreational destinations and leisure-time physical activity in Chinese urban elders

Conference Theme: Promoting Healthy Eating and Activity WorldwideSession - S36 The relationships between the physical environment and physical activity in older adults: results from four different continents: abstract S36.4PURPOSE: The built environment may impact on elders’ ability to engage in leisure-time physical activity (LTPA). Environmental correlates of LTPA in Chinese older residents of ultra-dense cities are unknown. The main aim of this study was to examine associations of objectively-measured recreational facilities in the neighborhood with LTPA (walking and other forms of activity) in Chinese elders residing in an ultra-dense city. We also examined whether these associations depend on other environmental factors. METHOD: This study was conducted in Hong Kong in …postprin

Associations between the neighbourhood environment characteristics and physical activity in older adults with specific types of chronic conditions: The ALECS cross-sectional study

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ENDOSCOPY IN TIME CAN BE A LIFE SAVER: OUR UPPER ENDOSCOPY RESULTS

Objectives: Endoscopy is the best diagnostic test for the diseases in upper digestive system. In addition to diagnosis, endoscopy is also useful in treatment of specific conditions. Methods: The patients admitted to Doğubayazıt state hospital’s endoscopy unit between 2008 January and 2011 July enrolled to the study. Endoscopy was performed with a GIF- XQ30 Olympus device. We assessed endoscopic findings of 3158 patients retrospectively. Results: A total of 3158 patients (1434 male and 1724 female) enrolled to the study. Gastritis was the most common diagnosis in our series. Patients with duodenal ulcer (mean age: 38,3+/-14,3 years) were younger than those with gastric ulcer (mean age: 48,4+/-15,8 years). Conclusions: Although gastritis, esophagitis and bile reflux, which are benign conditions,  were common diagnosis in our series, endoscopy should not be delayed in symptomatic patients because, according to our findings, 2 or 3 of every 100 patients undergone endoscopic examination may have malign tumors in upper gastrointestinal system

Neighbourhood environment, physical activity, quality of life and depressive symptoms in Hong Kong older adults: A protocol for an observational study

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Effects of built environment on walking among Hong Kong older adults

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