bluuebunny/crossref_metadata_2025 huggingface dataset:
Broadband Bismuth-Doped Fiber Amplifier With a Record 115-nm Bandwidth in the O and E Bands
Authors: Wang Y. , Thipparapu N. K. , Richardson D. J. , Sahu J. K.
Published: March 2020

We report a bismuth-doped fiber amplifier providing >20dB gain from 1345nm- 1460nm with 31dB maximum gain and 4.8dB NF at 1420nm for a -23dBm signal. The gain coefficient and temperature-dependent-gain coefficient are 0.042dB/mW and -0.015dB/°C, respectively.
Real-Time Demonstration of 600 Gb/s DP-64QAM SelfHomodyne Coherent Bi-Direction Transmission with Un-Cooled DFB Laser
Authors: Gui Tao , Wang Xuefeng , Tang Ming , Yu Yi , Lu Yanzhao , Li Liangchuan
Published: March 2020

We report first successful real-time self-homodyne coherent bi-direction transmission demonstration with 600-Gb/s DP-64QAM under un-cooled ~7-MHz linewidth DFB laser. A novel coherent receiver is proposed to achieve automatic stabilization against polarization fluctuations of received LO.
400Gb/s Real-time Transmission Supporting CPRI and eCPRI Traffic for Hybrid LTE-5G Networks
Authors: Le Son Thai , Drenski Tomislav , Hills Andrew , King Malcom , Kim Kwangwoong , Matsui Yasuhiro , Sizer Theodore
Published: March 2020

We present the first CMOS ASIC to support either 4x25Gb/s eCPRI or 4x24.33Gb/s CPRI-10 traffic per optical wavelength and demonstrate 200Gb/s and 400Gb/s transmissions in O and C bands over 20km for hybrid LTE-5G fronthaul networks.
172 Tb/s C+L Band Transmission over 2040 km Strongly Coupled 3-Core Fiber
Authors: Rademacher Georg , Luís Ruben S. , Puttnam Benjamin J. , Ryf Roland , van der Heide Sjoerd , Eriksson Tobias A. , Fontaine Nicolas K. , Chen Haoshuo , Essiambre René-Jean , Awaji Yoshinari , Furukawa Hideaki , Wada Naoya
Published: March 2020

Coupled-core multi-core fiber transmission is demonstrated across 359 C- and L-band channels with low spatial-mode-dispersion. A net-data-rate of 172 Tb/s over 2040 km is achieved, doubling the record data-rate-distance-product for standard cladding diameter SDM fibers.
Temporally interleaved optical time-stretch imaging
Authors: Weng Yueyun , Wu Gai , Mei Liye , Wang Qijun , Goda Keisuke , Liu Sheng , Lei Cheng
Published: March 2020

Optical time-stretch imaging has shown potential in diverse fields for its capability of acquiring images at high speed and high resolution. However, its wide application is hindered by the stringent requirement on the instrumentation hardware caused by the high-speed serial data stream. Here we demonstrate temporally interleaved optical time-stretch imaging that lowers the requirement without sacrificing the frame rate or spatial resolution by interleaving the high-speed data stream into multiple channels in the time domain. Its performance is validated with both a United States Air Force (USAF)-1951 resolution chart and a single-crystal diamond film. We achieve a 101 Mfps 1D scanning rate and 3 µm spatial resolution with only a 2.5 GS/s sampling rate by using a two-channel-interleaved system.
Multiwavelength three-dimensional microscopy with spatially incoherent light, based on computational coherent superposition
Authors: Tahara Tatsuki , Ito Tomoyoshi , Ichihashi Yasuyuki , Oi Ryutaro
Published: March 2020

In this Letter, we propose spatially incoherent multiwavelength three-dimensional (3D) microscopy that exploits holographic multiplexing and is based on computational coherent superposition (CCS). The proposed microscopy generates spatially incoherent wavelength-multiplexed self-interference holograms with a multiband-pass filter and spatially and temporally incoherent light diffracted from specimens. Selective extractions of 3D spatial information at multiple wavelengths from the holograms are realized using the CCS scheme. We constructed fully mechanical-motion-free holographic multiwavelength 3D microscopy systems and conducted experiments to demonstrate the microscopy.
Build-up dynamics in bidirectional soliton fiber lasers
Authors: Kudelin Igor , Sugavanam Srikanth , Chernysheva Maria
Published: March 2020

Bidirectional ultrafast fiber lasers present an attractive solution, enabling the generation of two mutually coherent ultrashort pulse trains in a simple and turnkey system. Still, the lack of a comprehensive numerical model describing steady-state bidirectional generation, and even less ultrafast soliton breakdowns and collisions, is obstructing the achievement of the performance compared with unidirectional lasers. In this paper, we have experimentally investigated real-time build-up dynamics of counter-propagating solitons in an ultrafast ring Er-doped fiber laser via the dispersive Fourier transform methodology. We parade that counter-propagating pulses experience independent build-up dynamics from modulation instability, undergoing breathing dynamics and diverging subordinate pulse structure formation and annihilation to a stable bidirectional pulse train. Yet, the interaction of pulses in the cavity presents the key underlying phenomenon driving formation evolution distinct from unidirectional pulse build-up. Our findings will provide physical foundations for bidirectional ultrafast fiber laser design to carry forward their application.
Histological and Biochemical Study on Mitigation of Dichlorvos-Induced Hepatotoxicity by Mimosa Pudica in Mice
Authors: Anderson Enye Linus , Angel Keboh , Edem Edem , Olusola S Saka , Godson Akunna Gabriel
Published: March 2020

Objective
Exposure of dichlorvos-contaminated foods, water and environment can lead to decrease in proper liver function. Thus, Mimosa pudica(MP)is being investigated in the present study to determine its protective effect on dichlorvos induced hepatotoxity in Mice.

Methods
Fifty adult male BALB/c mice weighing between 20-30g were randomly assigned into 5 groups of 10 animals each (Groups A, B, C, D, and E). Group A as the control Group received normal feed, group B received 0.1 ml of MP, group C was given 40 g of 2.5% Dichlorvos (DDVP) for 28 days. While, group D were given 40 g of 2.5% DDVP with 0.1ml of MP and group E animals were given DDVP for half the period of administration, normal feed and 0.1ml MP for 14 days. Histological and biochemical preparations of the liver were processed and data were expressed as mean± SEM. Significant difference was set at p<0.05.

Results
ALT activity and the total protein level of the liver show no significant increase (P < 0.005) when compared with the control. AST and ALP activities were significantly increased in animals given DDVP with subsequent MP treatment when compared with the controls. Histological studies revealed distortion of normal hepatic histoarchitecture in DDVP group B and MP groups mitigated these changes in the treated groups.

Conclusion
Dichlorvos caused tissue distortion in the mice with prominent toxic effects on the liver while MP extract showed ameliorative effects on the liver that was exposed to DDVP
Fatores de sustentação dos resultados do kaizen na produtividade: estudo de caso múltiplo
Authors: Bassi Edson , Valente Carlos Magno de Oliveira , Amaral Creusa Sayuri Tahara , Campanini Luciano
Published: March 2020

A filosofia kaizen, apesar de ser considerada uma das ferramentas mais eficazes para a melhoria dos processos industriais, tem encontrado dificuldades para sustentar as melhorias feitas no longo prazo. O objetivo deste artigo é analisar quais os fatores que sustentam os resultados do kaizen na produtividade das empresas, que implantaram o kaizen por um longo prazo. A pesquisa utilizou-se do estudo de caso múltiplo com duas abordagens: quantitativa e qualitativa. Na investigação quantitativa, foi realizado um recorte longitudinal em uma empresa do segmento têxtil. Os dados coletados foram obtidos a partir de formulários, observação sistemática do processo, e relatórios da empresa. Na investigação qualitativa, cujo recorte temporal foi transversal, foram realizadas entrevistas utilizando-se de um questionário semiestruturado, em diversas empresas que implantaram o kaizen por um longo prazo, com um sistema de produção equivalente a indústria têxtil. Ao comparar as empresas, buscou-se identificar e agrupar os fatores considerados importantes pelas empresas. Além da identificação dos fatores que contribuem para a sustentação das melhorias do kaizen, obteve-se também um roteiro para auxiliar a sustentação dos resultados do kaizen na produtividade das empresas.
Performance and Clinimetric Properties of the Timed Up From Floor Test Completed by Apparently Healthy Community-Dwelling Older Women
Authors: Moffett Marilyn A. , Avers Dale , Bohannon Richard W. , Shaw Keiba L. , Merlo Angela R.
Published: March 2020

Background and Purpose:

Standing up from the floor is a demanding mobility activity with important implications. The purpose of this study was to describe performance and the clinimetric properties of the Timed Up From Floor (TUFF) test completed by apparently healthy community-dwelling older women.

Methods:

In this observational and methodological quality study, 52 community-dwelling women, 55 years and older, were examined. Convergent and discriminant validities were examined by analyzing the correlations of TUFF test times with other mobility variables and emotional status, respectively. Validity was further examined by comparing TUFF times between age groups and fall risk groups. Interrater reliability of the TUFF test was established by comparing the times obtained by 3 raters observing the same videotaped performances. Test-retest reliability was determined by having the same 3 raters observe videos of the same participants performing the TUFF test during a second session 1 week later.

Results:

The grand mean (SD) TUFF time measured by all testers on the first day was 5.8 (2.9) seconds. Convergent validity was demonstrated by significant negative (P < .001) Spearman correlations between the TUFF test and the Physical Functioning Scale of the 36-Item Short Form Health Survey (SF-36) (−0.69), usual gait speed (−0.48), fast gait speed (−0.74), and the 30-second sit-to-stand test (−0.46). Discriminant validity was indicated by a low and nonsignificant correlation (0.17) between the TUFF test and the SF-36 Emotional Well-being Scale. Known-groups validity was supported by a significant difference in the TUFF test times of 2 age groups (P = .02) and 2 fall risk groups (P < .001). The TUFF test was determined to have excellent relative interrater reliability (intraclass correlation coefficient [ICC] of 0.99) and absolute reliability (minimal detectable change [MDC95%] of 0.8 seconds). Relative test-retest reliability was excellent with ICCs of 0.88 to 0.92. Corresponding MDC95% values were large (2.4-2.8 seconds and 40.7%-45.9%).

Conclusions:

The TUFF test is an informative, reliable, and valid tool suitable for documenting mobility limitations in independent community-dwelling older women. More information regarding responsiveness is required.
Age Moderates Differences in Performance on the Instrumented Timed Up and Go Test Between People With Dementia and Their Informal Caregivers
Authors: Williams Jonathan M. , Nyman Samuel R.
Published: March 2020

Background and Purpose:

The instrumented Timed Up and Go test (iTUG) affords quantification of the subelements of the Timed Up and Go test to assess fall risk and physical performance. A miniature sensor applied to the back is able to capture accelerations and velocities from which the subelements of the iTUG can be quantified. This study is the first to compare iTUG performance between people with dementia (PWD) and their age-matched caregivers. The aims of this study were to explore how age moderates the differences in performance on the iTUG between PWD and their informal caregivers.

Methods:

Eight-three community-dwelling older PWD and their informal caregivers were recruited for this cross-sectional, observational study. Participants were grouped by age: younger than 70 years, 70 to 79 years, and 80 years and older. Participants wore an inertial sensor while performing the iTUG in their home. The performance of the subelements sit-to-stand, walking, and turning were captured through an algorithm converting accelerations and velocities into performance metrics such as duration and peak velocity. Performance for PWD was compared with caregivers for each age-matched group, and multiple regression models incorporating age, gender, and presence or absence of dementia were computed.

Results:

People with dementia took longer to turn in the younger than 70-year group, suggesting this may be an early indicator of functional decline in this age group. People with dementia took longer to complete the whole iTUG compared with caregivers in the 70- to 79-year-old group. In the 80+-year-old group, PWD took longer to complete both walking phases, sit-to-stand, and the full iTUG along with displaying slower turning velocity. Multiple regression models illustrated that gender failed to contribute significantly to the model, but age and presence of dementia explained around 30% of the variance of time to complete walking phases, total iTUG, and turning velocity.

Conclusions:

Differences were evident in performance of the iTUG between PWD and caregivers even after controlling for age. Age moderates the differences observed in performance.
Localized Calcium Signaling and the Control of Coupling at Cx36 Gap Junctions
Authors: Moore Keith B. , Mitchell Cheryl K. , Lin Ya-Ping , Lee Yuan-Hao , Shihabeddin Eyad , O’Brien John
Published: March 2020

A variety of electrical synapses are capable of activity-dependent plasticity, including both activity-dependent potentiation and activity-dependent depression. In several types of neurons, activity-dependent electrical synapse plasticity depends on changes in the local Ca2+environment. To enable study of local Ca2+signaling that regulates plasticity, we developed a GCaMP Ca2+biosensor fused to the electrical synapse protein Connexin 36 (Cx36). Cx36-GCaMP transfected into mammalian cell cultures formed gap junctions at cell-cell boundaries and supported Neurobiotin tracer coupling that was regulated by protein kinase A signaling in the same way as Cx36. Cx36-GCaMP gap junctions robustly reported local Ca2+increases in response to addition of a Ca2+ionophore with increases in fluorescence that recovered during washout. Recovery was strongly dependent on Na+-Ca2+exchange activity. In cells transfected with NMDA receptor subunits, Cx36-GCaMP revealed transient and concentration-dependent increases in local Ca2+on brief application of glutamate. In HeLa cells, glutamate application increased Cx36-GCaMP tracer coupling through a mechanism that depended in part on Ca2+, calmodulin-dependent protein kinase II (CaMKII) activity. This potentiation of coupling did not require exogenous expression of glutamate receptors, but could be accomplished by endogenously expressed glutamate receptors with pharmacological characteristics reminiscent of NMDA and kainate receptors. Analysis of RNA Sequencing data from HeLa cells confirmed expression of NMDA receptor subunits NR1, NR2C, and NR3B. In summary, Cx36-GCaMP is an effective tool to measure changes in the Ca2+microenvironment around Cx36 gap junctions. Furthermore, HeLa cells can serve as a model system to study glutamate receptor-driven potentiation of electrical synapses.
La política pública de inclusión: utopía de la gestión educativa en Colombia
Authors: Castro Castaño Lina María
Published: March 2020

El presente artículo hace referencia a la configuración de la política de inclusión. Este planteamiento requiere un análisis desde las representaciones que se tiene respecto de la gestión educativa en la implementación de la política; de allí que su propósito sea comprender la configuración de la inclusión como política y las representaciones de la gestión educativa para su implementación. En este sentido, la reflexión se desarrolla desde una investigación con alcance descriptivo, que busca especificar la configuración de la política desde la filosofía. Durante el proceso de investigación el diseño transeccional descriptivo permitió presentar el origen de la inclusión de forma transversal a la gestión educativa, y el método de datos secundarios implicó la revisión de la evolución de la política pública de inclusión en Colombia, con el fin de favorecer la reflexión de manera contextualizada. De esta manera, se reafirma la utopía como la meta que se encuentra en el horizonte y que, cada vez que el sistema se acerca, esta se aleja más. Se parte del recorrido histórico de la política pública educativa; luego, se continúa con los elementos de las representaciones y, por último, se plantea la utopía del sistema educativo, representada en la política de inclusión.
2.	Carrera moral y significados del dinero en el trabajo sexual: El caso de Bogotá - Colombia
Authors: Laverde Rodriguez Carlos Alfonso , Tirado Acero Misael
Published: March 2020

A partir de datos etnográficos se plantea un análisis de la forma en la que se entraman en el comercio sexual, o a través de él, las esferas de la intimidad y el mercado, de la sexualidad y afectividad, con la lógica del comercio sexual. Se explora a través de la forma en la que se construye socialmente el dinero y las jerarquías morales que produce, cuáles son las condiciones estructurales y afectivas en torno a experiencias personales y laborales de mujeres que participan o participaron en el comercio sexual auto percibiéndose como “trabajadoras sexuales”. Para esto, se retoma una serie de narrativas recolectadas en Colombia (Bogotá), con trabajadoras sexuales organizadas que abogan por el reconocimiento de sus derechos laborales.
Trabajo, tiempo libre y movilidad cotidiana en México 2014
Authors: Cervantes Romo Gabriela Alicia
Published: March 2020

La movilidad cotidiana por motivos de laborales se refiere a los viajes recurrentes con patrones específicos de horarios que se hacen día a día. Esta movilidad guarda un impacto directo en la distribución del tiempo de las personas para las actividades que realizan dentro del trabajo extradoméstico, doméstico y de cuidados, además del tiempo libre destinado al descanso, ocio y recreación. El objetivo de esta investigación es determinar la magnitud del efecto que la movilidad cotidiana por motivos de trabajo tiene en el tiempo libre, controlando por el trabajo extradoméstico, y el trabajo doméstico y de cuidados. Se emplea la Encuesta Nacional de Uso del Tiempo (ENUT) 2014. Los hallazgos indican que sí existe un efecto negativo de la movilidad cotidiana por motivos laborales que reduce el tiempo libre, además de otras variables que evidencian las desigualdades de género latentes en el uso del tiempo de la población ocupada.
Un acercamiento teórico sobre la mujer en la seguridad social
Authors: Vargas Sandoval Yaneth
Published: March 2020

En el presente artículo se hace un acercamiento teórico sobre la mujer y la seguridad social, haciendo un análisis de autores como Ulrich Beck y Zygmunt Bauman, para quienes la sociedad es una sociedad en riesgo; y planteándose, según Robert Castel, que dicho riesgo puede ser socializado a través de la seguridad social. En lo que respecta a la mujer, se analizarán teorías como las de Nussbaum y Amartya Sen, para quienes se debe abordar las condiciones de las mujeres a través de la teoría de las capacidades. Por su parte, con Nancy Fraser se analizarán las injusticias sufridas por las mujeres, por un lado, de tipo económicas o de redistribución y, por otro lado, culturales o de reconocimiento. Sumado a lo anterior, se analizan las teorías de Winkander y de Federici, con quienes se determinará la división sexual del trabajo, y cómo esta afecta hasta nuestros días los trabajos que desempeñan las mujeres y su no reconocimiento. Por último, se analiza cómo los sistemas de seguridad social replican las inequidades sufridas por las mujeres.
El debido proceso en las actuaciones administrativas de las fotomultas
Authors: Obando Carrascal James Orlando , Ramírez Valencia Alejandra , Vergara Franco Jhonatan Stiven
Published: March 2020

En el presente proyecto de investigación se busca observar cómo se están llevando a cabo las notificaciones de fotodetecciones, más conocidas como fotomultas, y establecer si se está vulnerando o no el derecho fundamental al debido proceso administrativo y, por consiguiente, el principio de legitimidad consagrado en el artículo 6 de la Constitución política de Colombia, como consecuencia de esta práctica por parte de los institutos de movilidad del país. Se procede a estudiar de manera juiciosa la jurisprudencia y la doctrina que ayuden a dilucidar de manera clara cómo se garantiza por parte de la administración este derecho fundamental y, por ende, si se cumple con los fines esenciales del estado.
Antibiotic Use and Outcomes in Children in the Emergency Department With Suspected Pneumonia
Authors: Lipshaw Matthew J. , Eckerle Michelle , Florin Todd A. , Crotty Eric J. , Lipscomb Jessi , Jacobs Judd , Rattan Mantosh S. , Ruddy Richard M. , Shah Samir S. , Ambroggio Lilliam
Published: March 2020

BACKGROUND AND OBJECTIVES:

Antibiotic therapy is often prescribed for suspected community-acquired pneumonia (CAP) in children despite a lack of knowledge of causative pathogen. Our objective in this study was to investigate the association between antibiotic prescription and treatment failure in children with suspected CAP who are discharged from the hospital emergency department (ED).

METHODS:

We performed a prospective cohort study of children (ages 3 months–18 years) who were discharged from the ED with suspected CAP. The primary exposure was antibiotic receipt or prescription. The primary outcome was treatment failure (ie, hospitalization after being discharged from the ED, return visit with antibiotic initiation or change, or antibiotic change within 7–15 days from the ED visit). The secondary outcomes included parent-reported quality-of-life measures. Propensity score matching was used to limit potential bias attributable to treatment selection between children who did and did not receive an antibiotic prescription.

RESULTS:

Of 337 eligible children, 294 were matched on the basis of propensity score. There was no statistical difference in treatment failure between children who received antibiotics and those who did not (odds ratio 1.0; 95% confidence interval 0.45–2.2). There was no difference in the proportion of children with return visits with hospitalization (3.4% with antibiotics versus 3.4% without), initiation and/or change of antibiotics (4.8% vs 6.1%), or parent-reported quality-of-life measures.

CONCLUSIONS:

Among children with suspected CAP, the outcomes were not statistically different between those who did and did not receive an antibiotic prescription.
Hospitalizações infantis por condições sensíveis à atenção primária em cidade brasileira
Authors: Amaral Jackeline Vieira , Araujo Filho Augusto Cezar Antunes de , Da Rocha Silvana Santiago
Published: March 2020

Objetivo: analisar a evolução temporal das hospitalizações, de crianças menores de cinco anos, por condições sensíveis à atenção primária em Teresina-PI, Brasil, de 2003 a 2012.Métodos: trata-se de estudo retrospectivo, descritivo e quantitativo, realizado a partir de dados secundários extraídos da Rede Interagencial de Informações para a Saúde, disponíveis no sítio eletrônico do Departamento de Informática do Sistema Único de Saúde. As hospitalizações foram analisadas em dois grupos etários: crianças menores de um ano de idade e crianças entre um e quatro anos de idade.Resultados: apesar das flutuações no período analisado, a taxa de hospitalizações teve um decréscimo de 71,88 %. Em crianças menores de um ano, o declínio foi de 71,49 % e, com idade entre um e quatro anos, a redução foi de 72,30 %. A maioria das hospitalizações ocorreu no sexo masculino, e as causas que predominaram foram gastroenterites infecciosas e pneumonias bacterianas.Conclusões: as hospitalizações por condições sensíveis à atenção primária tiveram um declínio ao longo da década analisada, entretanto houve um predomínio de condições sensíveis que poderiam ser evitadas ou até mesmo solucionadas se fossem aplicadas as medidas disponíveis e de baixo custo nos serviços primários de saúde.
Influence of tax burden on economic development of agricultural enterprises in Ukraine
Authors: Odintsov Oleg , Yevtukhova Tetiana , Vasylkonova Elina , Kunchenko-Kharchenko Valentyna
Published: March 2020

The condition of the effective development of agricultural enterprises in Ukraine is to increase the efficiency of using resource potential. At the same time, it is necessary to take into account the main factors of the development, including the tax burden on the industry. Therefore, it is important to study the impact of the tax burden on the economic performance of the agricultural enterprises. The article deals with the improvement of the traditional two-factor production function of the Cobb-Douglas through the inclusion of the additional factors. The four-factorial production-institutional function of agricultural enterprises in Ukraine has been constructed allowing to calculate econometric parameters and to evaluate the functioning of the industry. The patterns of the interaction of tax burden and economic growth agricultural enterprises in Ukraine are revealed.  The calculated econometric parameters of the functioning of agricultural enterprises in Ukraine made it possible to determine the tax loadings points Laffer's of the first and second orders, the productivity of each factor, and the phased replacement of one factor to another. It has been proved that optimizing the tax burden on agricultural enterprises makes it possible to direct the resource potential to increase the agricultural volumes production and increase tax revenues from the industry.
Evaluation of occupants’ thermal perception in a university hospital in Turkey
Authors: Caner Ismail , Ilten Nadir
Published: March 2020

This study analysed the current thermal comfort conditions of Balikesir University Hospital in Turkey. Measurements and questionnaire surveys were performed to evaluate thermal comfort conditions. Environmental parameters such as air temperature, globe temperature, relative humidity and air velocity were measured. A total of 429 questionnaires were collected and analysed by using SPSS software version 22.0 to understand patients’, visitors’ and nurses’ perceptions on thermal comfort in the hospital. A total of 214 surveys were conducted in the summer period, and 215 surveys were conducted in the winter period. According to the results, thermal comfort levels for each group were ‘neutral’ in summer and ‘slightly warm’ in winter. Barely, the survey results showed that perception of thermal comfort was ‘slightly warm’ in summer and ‘neutral’ in winter. The thermal comfort level was mostly affected by differences in gender, age, participant type and orientation of the room. Furthermore, the requirements set out in standards did not meet those of respondents’ perceived thermal comfort. Finally, the relationships between predicted mean vote, actual mean vote and operative temperatures were examined. This analysis also demonstrated that the preferred temperature was 2·5°C below the predicted temperature for summer and 1°C above the predicted temperature for winter. According to these results, the neutrality point has shifted to +0·7 on the seven-point scale for both seasons.
Experimental investigation of hysteretic behaviour of non-structural dry gypsum infill walls
Authors: Çakmak Coşkun , Kopraman Yağmur , Özdemir Anıl , Anıl Özgür , Gökdemir Ahmet
Published: March 2020

Studies carried out concerning the non-bearing partition wall systems used in buildings have increased in recent years. A very limited number of studies about the behaviour of gypsum wallboard systems under cyclic repeated loads have been found in the literature. An experimental study was carried out under earthquake loads to investigate the properties of gypsum wallboard systems, such as general load–displacement behaviour, stiffness, displacement ductility ratios and energy dissipation capacities. Ten different non-bearing wall specimens were produced. Four of these wall specimens consisted of different gypsum wallboard infill walls and the remaining six consisted of plastered and non-plastered infill wall specimens built with clay bricks, light concrete briquettes and aerated concrete blocks. As a result of this study, the performance levels and general behaviours of dry gypsum infill wall systems under the effect of horizontal cyclic reversible loading were determined by comparing with other infill wall systems. Although the initial stiffness and ultimate load capacity values of the dry gypsum infill wall systems were lower compared to a masonry infill wall and lightweight concrete brick walls, it was determined that they performed very successfully in terms of displacement ductility ratio and energy dissipation capacity.
Claves teológicas de Aparecida
Authors: Jumbo González Italo
Published: March 2020

La Conferencia General del Documento de Aparecida (DA) tiene como tema: “Discípulos y misioneros de Jesucristo para que nuestros pueblos en Él, tengan vida” (Jn 14, 6).Caminos de vida verdadera y plena para todos, caminos de vida eterna, abiertos por la fe en Jesucristo. Situación nueva que consiste en recomenzar desde Cristo, reconociendo que: “no se comienza a ser cristiano por una decisión ética o por una gran idea filosófica, sino por el encuentro con un acontecimiento, con una persona, que da un nuevo horizonte a la vida y, con ello, una orientación decisiva” (DA n. 5), y una nueva manera de conocimiento y encuentro en nuestra propia riqueza personal, social y comunitaria.Es claro que en comunidad, conocer a Jesucristo por la fe, es nuestro gozo; seguirlo es una gracia; y, transmitir este tesoro a los demás es un encargo que el Señor, al llamarnos y elegirnos, ha confiado a cada uno de nosotros, bautizados por el Espíritu Santo que llevamos dentro, una comunicación y comunión con Jesucristo para que sea encontrado, seguido, amado, adorado, anunciado y comunicado a ...
Derechos del menor en clave salesiana
Authors: Guzón José Luis
Published: March 2020

El autor comienza su artículo con un recorrido histórico para entender cómo se ha llegado al concepto de ¿menor'. Inmediatamente después de estas primeras reflexiones afirma que la educación es un derecho fundamental reconocido universalmente. Desde esta clave sitúa la labor pastoral del joven sacerdote Juan Bosco, quien se acerca al mundo juvenil con una finalidad educativo-evangelizadora. La educación sigue siendo ¿afirma el autor- el principal problema de nuestra sociedad, y hoy somos testigos de algunas dificultades en el ámbito educativo: crisis de autoridad, de sentido y de socialización. En la última parte del artículo centra sus reflexiones en el Sistema Preventivo como respuesta a la urgencia educativa.
2019 WSGC Intercollegiate Rocket Engineering Competition
Authors: Tollison Chandler R , Guither Adrian , DeVries Christina , Dickler Jane , Taylor Ethan
Published: March 2020

The Intercollegiate Rocket Engineering Competition is held by the Experimental Sounding Rocket Association every year at Spaceport America, New Mexico. The competition has many categories, and Pioneer Rocketry chose to compete in the 10k COTS category, flying Something Cheesy to an altitude of 10,000 feet on a commercial motor, with a 4 Kg payload. The payload studied the breakdown voltage of air with respect to altitude. Pioneer Rocketry is proud to report that Something Cheesy had a safe and successful flight and recovery. Unfortunately, due to a motor anomaly, Something Cheesy flew short of its 10,000-foot goal. The team is proud to have represented the state of Wisconsin at this international event, winning the “Cheesiest Rocket” award, as well as being runner up for the spirit award.
The effects of high gravitational stress on the expression of stress response genes in Arabidopsis thaliana
Authors: Zappia Sophia Alessandra
Published: March 2020

As humans venture farther into space, we are increasingly interested in how plants respond to the unique conditions of spaceflight. This experiment focuses on how gene expression in the model plant Arabidopsis thaliana is affected by high-gravitational stress that is comparable to the amount experienced on a small model rocket. The genes chosen have been studied previously for their roles in mechanical stress and pathogen response. Our results showed an increase in expression of the genes TCH2, TCH3, and MPK3, no change in the expression of CBP60g, and a decrease in the expression of RCI3 and ICS1. These results are largely consistent with spaceflight data and warrant further investigation into the effects of rocket launch on plant growth.
A Search for Submillimeter Galaxy Counterparts
Authors: Blair Ariana
Published: March 2020

In this paper, we look to find counterparts to our 450µm sources found in our SCUBA-2 imaging of the Chandra Deep Field – South (CDF-S). We chose sources greater than 4σ and found 21 sources. We then matched the sources to a published 850µm ALMA catalog. We matched the sources within a 4 arcsecond radius and found 12 matches to our 450µm sources. Using the fluxes from the SCUBA-2 CDF-S map and the ALMA 850µm fluxes from the catalog. We created a 450µm to 850µm flux ratio versus redshift plotted against an Arp220 spectral energy distribution (SED) at varying temperatures.
Chasing down variable stars from a decade-long dataset
Authors: Noughani Nikki Giti , Kotulla Ralf
Published: March 2020

Finding and characterizing variable stars is at the heart of a relatively modern branch of astronomy named time-domain astrophysics. Variable Stars are ordinary stars that change in brightness on widely varying degrees. Characterizing the details of how this brightness fluctuates and on what timescales, as well as the star's average properties (mean brightness, temperature, etc.), is greatly important to understanding the process of stellar evolution. For this project, we use data over ten years from the 0.5 meter Sloan Digital Sky Survey telescope. We will develop tools that can identify several variable stars, estimate their variability periods and timescales, and determine the shape of their brightness variations over this time.
Strength analysis of solder joints used in microelectronics packaging
Authors: Wymysłowski Artur , Jankowski Krystian
Published: March 2020

The aim of the research was the problem of damage accumulation for solder alloys used in microelectronics packaging due to
creep and fatigue as a result of a combined profile of loading conditions. The selected failure modes affect the lifetime of contemporary electronic equipment. So far the research activities are focused on a single failure mode and the problem of their interaction is
often omitted. Taking into account the failure modes interaction would allow more precise lifetime prediction of the contemporary
electronic equipment and/or would allow for reduction of time required for reliability tests. Within the taken research framework
the reliability analysis of solder joints was conducted for the Sn63Pb37 solder alloy using the Hot Bump Pull method. The results
of the presented research contain: reliability tests, statistical analysis and the problem of a damage accumulation due to a combined profile of loading conditions.
Ships speed limitations for reliable maintenance of the quay walls of navigation channels in ports
Authors: Paulauskas Vytautas , Filina-Dawidowicz Ludmiła , Paulauskas Donatas
Published: March 2020

There is a number of ports where approach or inside navigation channels are located close to the quay walls. In difficult hydrometeorological conditions appropriate speed of ship is needed to keep proper ship’s steering while passing through channel. The
ships that pass near the quay walls with high speed create high interaction forces on moored ships and negatively interact on their
mooring equipment and quay walls. Ports should ensure relevant maintenance and reliability of quay walls and ships’ mooring
equipment. That is why investigation of the ships interaction forces during ship passing near the ships moored to quay walls is
very important to find limitations of the passing ship speed depending on passing ship’s parameters, distances and environmental
conditions to provide reliable maintenance of navigation channel. In the article the conditions of dynamic forces caused by passing ships are investigated, including possible external forces influencing on moored ships, mooring equipment and quay walls.
The methodology to assess the forces exerted on ship moored to quay wall by ship passing close to them is created. On the basis of
the case study analysis results, the recommendations for the limitations to ships passing near the ships moored to quay walls were
proposed that will allow providing relevant maintenance and reliability of navigation channel and its infrastructure.
Physics-of-failure and computer-aided simulation fusion approach with a software system for electronics reliability analysis
Authors: Sun Bo , Li Yu , Wang Zili , Li Zhifeng , Xia Quan , Ren Yi , Feng Qiang , Yang Dezhen , Qian Cheng
Published: March 2020

Electronics, such as those used in the communication, aerospace and energy domains, often have high reliability requirements.
To reduce the development and testing cost of electronics, reliability analysis needs to be incorporated into the design stage.
Compared with traditional approaches, the physics of failure (PoF) methodology can better address cost reduction in the design
stage. However, there are many difficulties in practical engineering applications, such as processing large amounts of engineering
information simultaneously. Therefore, a flexible approach and a software system for assisting designers in developing a reliability
analysis based on the PoF method in electronic product design processing are proposed. This approach integrates the PoF method
and computer-aided simulation methods, such as CAD, FEM and CFD.The software system integrates functional modules such
as product modeling, load-stress analysis and reliability analysis, which can help designers analyze the reliability of electronic
products in actual engineering design. This system includes software and hardware that validate the simulation models. Finally,
a case study is proposed in which the software system is used to analyze the filter module reliability of an industrial communication system. The results of the analysis indicate that the system can effectively promote reliability and can ensure the accuracy of
analysis with high computing efficiency.
Estimation of maintenance costs of a pipeline for a U-shaped hazard rate function in the imprecise setting
Authors: Romaniuk Maciej , Hryniewicz Olgierd
Published: March 2020

In this paper, we discuss imprecise settings for an evaluation of the maintenance costs of a water distribution system (WDS). Moments of failures of pipes are modelled using a newly proposed three-piece convex hazard rate function (HRF) for which number
of previous failures is taken into account, too. Both fuzzy sets and shadowed sets are used to model the impreciseness of important
parameters of this HRF and the costs of maintenance services. Contrary to more classical and widely-used approaches to cost
analysis (i.e. a constant yield or nominal value of money), a strictly stochastic process (i.e. the one-factor Vasicek model) of an
interest rate is assumed in the analysis of maintenance costs. This approach models future behaviour of the interest rate (i.e. the
future value of money) in a more realistic way. Respective algorithms together with exemplary results of numerical simulations for
two setups, which are related to fuzzy and shadowed sets, are also provided.
Application of the logistic regression for determining transition probability matrix of operating states in the transport systems
Authors: Kozłowski Edward , Borucka Anna , Świderski Andrzej
Published: March 2020

Transport companies can be regarded as a technical, organizational, economic and legal transport system. Maintaining the quality and continuity of the implementation of transport requisitions requires a high level of readiness of vehicles and staff (especially drivers). Managing and controlling the tasks being implemented is supported by mathematical models enabling to assess and determine the strategy regarding the actions undertaken. The support for managing processes relies mainly on the analysis of sequences of the subsequent activities (states). In many cases, this sequence of activities is modelled using stochastic processes that satisfy Markov property. Their classic application is only possible if the conditional probability distributions of future states are determined solely by the current operational state. The identification of such a stochastic process relies mainly on determining the probability matrix of interstate transitions. Unfortunately, in many cases the analyzed series of activities do not satisfy Markov property. In addition, the occurrence of the next state is affected by the length of time the system remains in the specified operating state. The article presents the method of constructing the matrix of probabilities of transitions between operational states. The values of this matrix depend on the time the object remains in the given state. The aim of the article was to present an alternative method of estimating the parameters of this matrix in a situation where the studied series does not satisfy Markov property. The logistic regression was used for this purpose.
İdrar kültürü pozitif erken doğum ve erken membran rüptüründe doğum süresi ve olumsuz neonatal sonuçların değerlendirilmesi
Authors: ÖZLER Sibel , ÖZTAŞ Efser , SOLMAZ Derya , GÜMÜŞ GÜLER Başak , ERSOY Ali Özgür , ÇAĞLAR Ali Turhan , DANIŞMAN Nuri
Published: March 2020

Amaç: Preterm erken membran rüptüründe (PPROM) ve preterm doğumda (PD) idrar yolu enfeksiyonunun olumsuz neonatal sonuçları ve doğum süresine ile arasındaki ilişkinin araştırılmasını amaçladık.Gereç ve Yöntem: 2008-2014 yılları arasında merkezimize başvuran 1033 gebe hastayı retrospektif olarak değerlendirdik. Çalışma grupları 446 PPROM ve 587 PD hastasından oluşuyordu. Bulgular: İdrar kültürü pozitif PPROM hastalarında transvajinal ultrasonografi ile ölçülen servikal uzunluk(OR = 0.806,) ve amniyon sıvısı indeksi (AFI), (OR = 0.961) ve idrar kültürü pozitif PD hastalarında sadece servikal uzunluk OR = 0.862 doğum süresinin yedi günden daha kısa olacağı ile ilişkili idi. Ayrıca idrar kültürü pozitif olan PPROM grubunda AFI’ nin (OR = 0.982) olumsuz neonatal sonuçlarla ilişkilendirileceğini belirledik.Sonuç: İdrar kültürü pozitif PPROM ve PD hastalarında olumsuz neonatal sonuçları ve doğum zamanını öngörmede AFI ve servikal uzunluk da kullanılabilir.
Dermatoşalazisli hastalarda üst kapak blefaroplasti cerrahisinin baş ağrısı üzerine etkisi
Authors: ALTIN EKİN Meryem
Published: March 2020

Amaç: Bu çalışmanın amacı dermatoşalazis hastalarına uygulanan blefaroplasti operasyonunun baş ağrısı semptomları üzerine olan etkisini araştırmaktır.Gereç ve Yöntem: Kliniğimizde Aralık 2018 ve Mayıs 2019 tarihleri arasında oküloplastik cerrahi planlanan hastalar prospektif olarak incelendi. Dermatoşalazis nedeniyle blefaroplasti operasyonu uygulanan hastalar blefaroplasti grubunu diğer oküloplastik cerrahi uygulananlar ise kontrol grubunu oluşturdu. En az 1 yıl süreyle baş ağrısı olan hastalar operasyon öncesi ve operasyon sonrası üçüncü ayda baş ağrısı etki testi (Head Impact Test, HIT-6) ile değerlendirildi. Tüm dermatoşalazisli hastaların blefaroplasti operasyonu öncesi ve sonrası marjin refleks mesafesi ölçüldü.Bulgular: Her iki grup arasında preoperatif HIT-6 skorları açısından anlamlı fark izlenmedi (p=0.624). Blefaroplasti grubunun postoperatif HIT-6 skoru kontrol grubunun postoperatif HIT-6 skorundan istatistiksel olarak anlamlı derecede daha düşüktü. Marjin refleks mesafesi < 2 mm olan hastaların %74.1’inde, 2-3 mm olanların %62.5’inde ve ≥ 4 mm olanların %22.2’sinde blefaroplasti sonrası HIT-6 skorlarında azalma saptandı. Marjin refleks mesafesinin değişimi ile HIT-6 skorundaki değişim arasında istatistiksel olarak anlamlı derecede negatif korelasyon izlendi. Sonuç: Dermatoşalazisi olan hastalarda blefaroplasti operasyonu sonrası baş ağrısı semptomlarında anlamlı derecede düzelme görülmektedir. Marjin refleks mesafesi kısa olan dermatoşalazisli hastalarda baş ağrısı semptomları blefaroplasti için fonksiyonel bir endikasyon olabilir.
Bakım verenlerin depresyon, kaygı düzeyleri, ölüm kaygısı ve yaşam kaliteleri
Authors: KULU Müberra , ÖZSOY Filiz
Published: March 2020

Amaç: Çalışmamızda; kronik fiziksel hastalığı olan kişilere bakım veren hasta yakınları ile şizofreni hastalarına bakım verenlerin depresyon-anksiyete düzeyleri, ölüm kaygıları ve yaşam kalitelerini karşılaştırmayı amaçladık. Gereç ve Yöntem: Çalışmaya üç grup alındı. İlki şizofreni hastalarının yakınları, ikinci grup Evde Sağlık Hizmetleri birimine kayıtlı hastaların yakınları ve üçüncü grup kontrol grubu olarak dahil edildi. Tüm katılımcılara; sosyodemografik veri formu, Ölüme İlişkin Depresyon Ölçeği (ÖDÖ), Templer Ölüm Kaygısı Ölçeği (TÖKÖ), Beck Depresyon Ölçeği (BDÖ), Beck Anksiyete Ölçeği (BAÖ) ve Yaşam Kalitesi Ölçeği (SF-36) uygulandı. Bulgular: Çalışmaya toplamda 115 kişi alındı. BDÖ için bakım veren hasta yakınlarının kontrol grubu ile karşılaştırıldığında aldıkları puanlar daha yüksekti). ÖDÖ için şizofreni hastalarının yakınlarının kontrol grubu ile karşılaştırıldığında daha yüksek değerler aldığı görüldü. SF-36 fiziksel fonksiyon, fiziksel rol kısıtlılığı, sosyal fonksiyon ve genel sağlık alt boyutları bakım veren kişilerin aldıkları puanların kontrol grubu ile karşılaştırıldığında daha düşük olduğu görüldü. Sonuç: Bakım veren kişilerin depresyon skorları ve ölüme ilişkin depresyon skorları yüksek, yaşam kalitesi ölçeğinden ise belli alt boyutlarda daha düşük puanlar elde ettikleri görüldü.
Obez endometroid endometrial kanserli olgulara pelvik lenfadenektomiye paraaortik lenfadenektomi eklenmesinin sağkalıma etkisi
Authors: KHATİB Ghanim , VARDAR Mehmet Ali , GÜZEL Ahmet Baris , KÜÇÜKGÖZ GÜLEÇ Ümran , SEYFETTİNOĞLU Sevtap , BAYAT Berin , BAĞIR Emine , PAYDAŞ Semra
Published: March 2020

Amaç: Bu çalışmada obez düşük grade endometroid endometrial kanserde pelvik lenfadenektomiye paraaortik lenfadenektomi eklenmesinin sağkalıma olan etkisini araştırmaya amaçlanmıştır.Gereç ve Yöntem: Opere edilen endometrium kanserlerinin patoloji raporları ve birimin bilgisayar kayıtları ile arşiv dosyaları retrospektif bir şekilde tarandı. Bu süre içerisinde tüm bilgilerine ulaşılabilen hastalardan, Vücut Kitle İndeksi (VKİ) >30 kg/m2 ve endometroid histolojiye sahip olan hastalar tespit edildi. Bu vakalardan sadece lenf nodu diseksiyonu yapılmış olanlar çalışmaya dahil edildi. Hastalar uygulanan lenfadenektomiye göre iki gruba ayrıldı; sadece pelvik lenfadenektomi ve pelvik-paraaortik lenfadenektomi. Grupların demografik, klinik, cerrahi, patolojik, takip ve sağkalım bilgileri analiz edilip karşılaştırıldı.Bulgular: Çalışmanın kriterlerine uygun 290 hasta tespit edildi, bunlardan lenf nodu diseksiyonu uygulanmayan 207 vaka çıkarıldıktan sonra, çalışma pelvik lenfadenektomi grubunda 34 ve pelvik-paraaortik lenfadenektomi grubunda 49 hasta ile yürütüldü. Genel olarak her iki grubun klinik, cerrahi ve patolojik özellikleri benzerdi. Beş yıllık hastalıksız sağkalım sırasıyla %80 ve %86.3, beş yıllık toplam sağkalım ise, %92.6 ve %86.3 idi.Sonuç: çalışmaya alınan bu özel hasta grubunda, lenf nodu diseksiyonu planlanması halinde, pelvik lenf nodu diseksiyonuna paraaortik lenfadenektominin eklenmesi sağkalıma katkı sağlamayabileceği düşüncesindeyiz