bluuebunny/crossref_metadata_2025 huggingface dataset:
Неупругий межмолекулярный обмен колебательными квантами и релаксация колебательно-возбужденных состояний в твердых бинарных системах
Authors: Алиев А.Р. , Ахмедов И.Р. , Какагасанов М.Г. , Алиев З.А. , Гафуров М.М. , Рабаданов К.Ш. , Амиров А.М.
Published: April 2017

Методами спектроскопии комбинационного рассеяния изучены процессы молекулярной релаксации в твeрдых бинарных системах нитрат-перхлорат: LiNO3-LiClO4, NaNO3-NaClO4 и KNO3-KClO4. Обнаружено, что время релаксации колебания nu1(A) аниона NO3- в бинарной системе меньше, чем в индивидуальном нитрате. Показано, что увеличение скорости релаксации объясняется наличием в системе дополнительного механизма релаксации колебательно-возбужденных состояний нитрат-иона. Этот механизм связан с возбуждением колебания другого аниона (ClO4-) и "рождением" решeточного фонона. Установлено, что условием реализации такого релаксационного механизма является то, что разность частот указанных колебаний должна соответствовать области достаточно высокой плотности состояний фононного спектра. КШР благодарит за поддержку РФФИ (проект N 16-33-60057\_мол\_а\_дк).) DOI: 10.21883/FTT.2017.04.44276.316
Равновесные структуры из углеродных алмазоподобных кластеров и их упругие свойства
Authors: Лисовенко Д.С. , Баимова Ю.А. , Рысаева Л.Х. , Городцов В.А. , Дмитриев С.В.
Published: April 2017

Методом молекулярно-динамического моделирования изучены трехмерные углеродные алмазоподобные фазы, состоящие из s-1ptp3-гибридизированных атомов, полученные сшивкой каркасов фуллереноподобных молекул. Для восьми кубических и одной гексагональной алмазоподобных фаз на основе фуллереноподобных молекул четырех типов найдены равновесные конфигурации и рассчитаны упругие константы. Результаты, полученные методом молекулярной динамики, использованы для аналитических расчетов упругих характеристик исследованных алмазоподобных фаз с кубической и гексагональной анизотропией. Найдено, что три из рассмотренных фаз при определенном выборе оси растяжения имеют отрицательный коэффициент Пуассона, т. е. являются частичными ауксетиками. Проанализирована изменчивость технических коэффициентов упругости (модуля Юнга, коэффициента Пуассона, модуля сдвига и объемного модуля). С.В. Дмитриев благодарит за финансовую поддержку РНФ (грант N 14-13-00982). Ю.А. Баимова выражает благодарность за стипендию Президента РФ молодым ученым и аспирантам (СП-4037.2015.1). Л.Х. Рысаева благодарит за финансовую поддержку РФФИ (грант N 16-32-00483-мол\_а). Анализ упругих свойств структур с кубической анизотропией из углеродных алмазоподобных кластеров проведен Д.С. Лисовенко и В.А. Городцовым в рамках гранта РФФИ N 16-01-00325. DOI: 10.21883/FTT.2017.04.44286.100
Влияние легирования атомами цезия и калия многостенных углеродных нанотрубок, выращенных в электрической	дуге, на их эмиссионные характеристики
Authors: Израэльянц К.Р. , Орлов А.П. , Ормонт А.Б. , Чиркова Е.Г.
Published: April 2017

Исследовано влияние атомов цезия и калия, нанесенных на многостенные углеродные нанотрубки, выращенные в электрической дуге, на их эмиссионные характеристики. Обнаружено, что вольт-амперные характеристики автоэлектронной эмиссии образцов с многостенными углеродными нанотрубками данного типа, легированных цезием или калием, сохраняют свою прямолинейность в координатах Фаулера-Нордгейма в пределах нескольких порядков изменения эмиссионного тока. Показано, что нанесение атомов цезия и калия приводит к значительному увеличению эмиссионного тока и уменьшению работы выхода varphi исследуемых эмиттеров с многостенными нанотрубками. Установлено, что работа выхода уменьшается при оптимальной толщине покрытия атомами цезия до varphi~3.1 eV, а в случае легирования калием --- до varphi~2.9 eV. Найдены оптимальные условия нанесения цезия и калия для достижения максимального эмиссионного тока. DOI: 10.21883/FTT.2017.04.44289.344
Акустодесорбция щелочных металлов и галогенов с однослойного графена: простые оценки
Authors: Давыдов С.Ю.
Published: April 2017

Для адсорбции атомов щелочных металлов и галогенов на однослойном графене проведены оценки увеличения вероятности термодесорбции под действием волны деформации, или акустодесорбции. Для этого, во-первых, предложено простое аналитическое выражение для энергии адсорбции. Во-вторых, с использованием разработанной ранее M-модели адсорбции рассмотрено влияние переменного во времени гидростатического сжатия-растяжения листа графена на заряд адатома и энергию адсорбции. Показано, что для галогенов значения производной энергии адсорбции по деформации на порядок больше, чем для щелочных металлов, а поток десорбируемых атомов максимален при десорбции иода. Для исследования зависимости заряда адатома от деформации использовалось также низкоэнергетическое приближение (НЭП). При этом оценки для щелочных металлов в рамках НЭП показали удовлетворительное согласие с результатами M-модели. В рамках НЭП продемонстрировано, что одноосная и гидростатическая деформации приводят к одинаковым по порядку величины эффектам. DOI: 10.21883/FTT.2017.04.44290.356
Метод выделения характерных фаз поведения в сложных сетях, находящихся в режиме перемежающейся обобщенной синхронизации
Authors: Короновский А.А. , Москаленко О.И. , Пивоваров А.А. , Храмов А.Е.
Published: April 2017

Предложен метод выделения фаз синхронных и асинхронных интервалов во временных реализациях взаимодействующих хаотических систем, представляющих собой элементы сети со сложной топологией связей и находящихся в состоянии перехода к режиму обобщенной синхронизации. Данный метод позволяет определять продолжительность фаз синхронной и асинхронной динамики, что потенциально дает возможность проанализировать статистические характеристики перемежающегося поведения рассматриваемых систем. DOI: 10.21883/PJTF.2017.07.44463.16523
Оценка времени существования уловленного вихря в круговой каверне на обтекаемом при нулевом угле атаки полукруговом профиле после отключения щелевого отсоса
Authors: Исаев С.А. , Баранов П.А. , Судаков А.Г. , Попов И.А. , Усачов А.Е.
Published: April 2017

Выполнен расчет перестройки периодической структуры турбулентного обтекания полукругового профиля под нулевым углом атаки при отключении системы щелевого отсоса воздуха из круговой каверны. Используются многоблочные вычислительные технологии решения осредненных по Рейнольдсу нестационарных уравнений Навье-Стокса с замыканием по модифицированной с учетом кривизны линий тока модели переноса сдвиговых напряжений. Оценено время существования уловленного вихря в круговой каверне. DOI: 10.21883/PJTF.2017.07.44466.16578
Ионизация молекул глицина alpha-частицами keV-энергий
Authors: Афросимов В.В. , Басалаев А.А. , Кузьмичев В.В. , Панов М.Н. , Смирнов О.В.
Published: April 2017

Методом "многостоповой" времяпролетной масс-спектрометрии исследован механизм радиационных повреждений молекул глицина, находящихся в газовой фазе, при взаимодействии с ионами He2+ с энергией Ep = 4 keV/a.m.u. Впервые измерены относительные сечения различных элементарных процессов, происходящих при однократных столкновениях молекул глицина с ионами. Обнаружено различие в фрагментации промежуточных двухзарядных ионов, формирующихся в процессах захвата одного электрона с ионизацией и двухэлектронного захвата, что объясняется разницей в энергии возбуждения молекулярных ионов. DOI: 10.21883/PJTF.2017.07.44470.16531
Мегаваттный генератор низкотемпературной плазмы постоянного тока с расширяющимися каналами газоразрядного тракта
Authors: Гаджиев М.Х. , Исакаев Э.Х. , Тюфтяев А.С. , Юсупов Д.И. , Саргсян М.А.
Published: April 2017

Разработан и исследован эффективный мегаваттный двухузловой генератор низкотемпературной плазмы аргона, состоящий из катодного и анодного узлов с расширяющимися каналами газоразрядных трактов и относящийся к классу плазмотронов постоянного тока, с КПД~80-85% и высоким ресурсом работы при силе тока до 4000 A. DOI: 10.21883/PJTF.2017.08.44529.16592
Влияние типа проводимости кремниевой подложки на эффективность метода фотостимулированной адсорбции полиэлектролитов
Authors: Стецюра С.В. , Козловский А.В. , Маляр И.В.
Published: April 2017

Исследованы изменения работы выхода электронов из кремния с разным типом проводимости при освещении и после осаждения на его поверхность слоя полиэтиленимина методом фотостимулированной адсорбции. Показано, что фотостимулированная адсорбция полиэтиленимина приводит к электрической пассивации, а ее эффективность коррелирует с величиной изменения работы выхода электронов при освещении. DOI: 10.21883/PJTF.2017.08.44531.16545
Эволюция структуры и механических свойств при отжиге сплава FeNi после мегапластической деформации
Authors: Глезер А.М. , Томчук А.А. , Бетехтин В.И. , Дунсюэ Би
Published: April 2017

Методами просвечивающей электронной микроскопии, дифракции обратно рассеянных электронов и измерения микротвердости проанализирована эволюция структурных параметров и механических свойств сплава FeNi в процессе отжига после мегапластической деформации при комнатной температуре в камере Бриджмена. Показано, что процесс первичной рекристаллизации сопровождается ростом ранее возникших при деформации рекристаллизованных зерен. В то же время деформационные фрагменты не способны к росту, поскольку их границы обладают крайне низкой подвижностью. DOI: 10.21883/PJTF.2017.08.44538.16484
Стабилизация спектра генерации твердотельного импульсного Nd-YAG-лазера с многопетлевым резонатором
Authors: Погода А.П. , Сергеев А.А. , Федин А.В. , Иванов А.С. , Никоноров Н.В.
Published: April 2017

Предложен способ стабилизации частоты и сужения ширины полосы генерации импульсного твердотельного Nd-YAG-лазера с динамическим самоадаптивным многопетлевым резонатором путем введения внутрирезонаторной стационарной объемной брэгговской решетки. Это позволяет зафиксировать частоту и уменьшить ширину спектральной линии генерации с 18 до 4 pm. DOI: 10.21883/PJTF.2017.08.44539.16571
Сравнение плазменного и теплового воздействий на сверхзвуковое обтекание аэродинамического тела
Authors: Азарова О.А. , Ерофеев А.В. , Лапушкина Т.А.
Published: April 2017

Рассмотрена задача изменения параметров сверхзвукового обтекания полуцилиндрического тела. Экспериментально исследовано плазменное воздействие на процесс обтекания путем газоразрядного увеличения степени неравновесности набегающего потока. Для параметров потока, принятых в эксперименте, проведено численное моделирование теплового воздействия на ударный слой однородной нагретой области с температурой газа, равной температуре электронов, измеренной в эксперименте. Сравнение полученных экспериментальных и расчетных данных позволило сделать вывод о возможном новом механизме управления сверхзвуковым потоком, связанном с повышением степени неравновесности газа в источнике энергии. DOI: 10.21883/PJTF.2017.08.44540.16598
Internet Addiction Through the Phase of Adolescence: A Questionnaire Study
Authors: Karacic Silvana , Oreskovic Stjepan
Published: April 2017

Background

Adolescents increasingly use the Internet for communication, education, entertainment, and other purposes in varying degrees. Given their vulnerable age, they may be prone to Internet addiction.

Objective

Our aim was to identify possible differences in the purpose of Internet use among adolescents with respect to age subgroup, country of residence, and gender and the distribution of Internet addiction across age subgroups. Another aim was to determine if there is a correlation between the purpose of Internet use and age and if this interaction influences the level of addiction to the Internet.

Methods

The study included a simple random sample of 1078 adolescents—534 boys and 525 girls—aged 11-18 years attending elementary and grammar schools in Croatia, Finland, and Poland. Adolescents were asked to complete an anonymous questionnaire and provide data on age, gender, country of residence, and purpose of Internet use (ie, school/work or entertainment). Collected data were analyzed with the chi-square test for correlations.

Results

Adolescents mostly used the Internet for entertainment (905/1078, 84.00%). More female than male adolescents used it for school/work (105/525, 20.0% vs 64/534, 12.0%, respectively). Internet for the purpose of school/work was mostly used by Polish adolescents (71/296, 24.0%), followed by Croatian (78/486, 16.0%) and Finnish (24/296, 8.0%) adolescents. The level of Internet addiction was the highest among the 15-16-year-old age subgroup and was lowest in the 11-12-year-old age subgroup. There was a weak but positive correlation between Internet addiction and age subgroup (P=.004). Male adolescents mostly contributed to the correlation between the age subgroup and level of addiction to the Internet (P=.001).

Conclusions

Adolescents aged 15-16 years, especially male adolescents, are the most prone to the development of Internet addiction, whereas adolescents aged 11-12 years show the lowest level of Internet addiction.
Persepsi ibu tentang makanan obesogenis sebagai faktor risiko obesitas pada anak sekolah dasar
Authors: Sulistyaningrum Elisa , Hadi Hamam , Julia Madarina
Published: April 2017

Background: Prevalence of children with over nutrition is a global problem that continues to increase every year. Obesity in children have  an obese risk in adulthood. The high prevalence of obesity in children due to poor nutrition. Parents, especially mothers have a great role in determining the chilrdren nutritional intake so mothers understanding to the type of food that causes obesity is very important.Objective: To determine the mother's perception of obesogenic food and its relation to the risk of obesity in elementary school children of Yogyakarta and Bantul.Method: This study was a case-control study. Mothers who have an obese child  (≥ 95 th percentile) as a case and mothers of children with nonobese (<95th percentile) as a control. Primary research locations in the city of Yogyakarta and Bantul district. The samples was selected by using the random sampling method. The minimum sample of cases and controls was 63 people 63 people (1: 1). Data analysis were using Chi-Square statistical tests and conditional logistic regression.Results: Subjects of the study consisted of 244 cases and 244 controls. Chi-Square test showed that mother's perception of the obesogenis food can not be used as a predictor for the occurrence of obesity in children (p>0.05). Children of mothers who have a wrong perception about sweet drinks have a obesity risk 1.85 times greater than children of mothers who have a right perception to sweet drinks. So did for the children of mothers who have a wrong perception of fast food have an obesity risk 1.76 times greater than children who had mothers with the correct perception of the traditional fast food. Then the children of mothers who had a wrong perception of full cream milk and other dairy products have a risk of obesity 3.3 times smaller than the mother who has the correct perception to the full cream milk and other dairy products. Mother's perception about obesogenic foods as risk factor of obesity in children is not influenced by the level of education, household expenditure and maternal work status (p>0.05).Conclusion: Perception mother of obesogenic foods can not be used as a predictor for the occurrence of obesity in children (p>0.05). The level of maternal education, maternal work status and household expenses rather than as a factor does not affect the mother's perception of the food obesogenis.
Bandera
Authors: Gómez Marin Jorge Enrique
Published: April 2017

Bandera
Evaluación de la herramienta SaTScanWhonet para la detección precoz de brotes en infecciones bacterianas en una institución de tercer nivel de atención en Colombia
Authors: Meneses-Ríos Andrés , Monsalve-Londoño José , Leal Castro Aura Lucía , Gamboa Óscar , Valderrama-Beltrán Sandra , Linares-Miranda Claudia Janeth
Published: April 2017

Introducción: Las infecciones asociadas al cuidado de la salud representan un problema de salud pública y la transmisión horizontal supone un incremento en la morbimortalidad y los costos en la atención. La vigilancia activa es costosa y tiene alto riesgo de omitir la detección de brotes, mientras que la virtual (modelos matemáticos) permite la búsqueda sistemática de alertas de brotes. El objetivo de este estudio es evaluar la relación costo-efectividad del uso de la herramienta SaTScan-Whonet para la detección temprana de infecciones bacterianas, comparada con la vigilancia tradicional en una institución de alta complejidad de Colombia. Metodología: En un hospital universitario de alta complejidad se realizó un estudio retrospectivo, se identificó un brote bacteriano, se caracterizó clínicamente y por biología molecular. Se extrajeron las bases de datos de los sistemas automatizados de identificación y susceptibilidad microbiológica. Se realizaron análisis retrospectivos de SaTScan-Whonet, así como simulaciones diarias para el primer semestre de 2011 de manera prospectiva; también se identificó la fecha para la alerta de detección de brote, tanto en la vigilancia activa como en la virtual. Resultados: Se aislaron 4.584 microorganismos en los servicios de hospitalización tanto UCI como no UCI entre 2010 y 2011 (2.288 y 2.296 respectivamente). Por vigilancia activa se notificó un brote por Enterococcus faecium el 28 de marzo de 2011, que fue caracterizado por biología molecular con la presencia del gen Van A, que confiere resistencia a glucopéptidos. Se identificó de manera retrospectiva una manifestación de Enterococcus faecium entre el 14 de marzo y el 10 de mayo de 2011 con un intervalo de recurrencia de 609.384. En los análisis prospectivos simulados se identificó la primera alerta de brote de esta bacteria el 13 de abril de 2011 con un intervalo de recurrencia de 3.897 (p = 0,0002655). Conclusión: La utilización de dicha herramienta de manera prospectiva no fue superior a la vigilancia activa en cuanto a oportunidad en la detección. Los análisis retrospectivos tuvieron un alto rendimiento diagnóstico y podrían ser de utilidad para los sistemas de vigilancia y control de los entes reguladores.
Respuesta a la carta de Faccini et al.
Authors: Cortés Jorge A. , Cuervo Sonia I.
Published: April 2017

Respuesta a la carta de Faccini et al.
An analytical approach to the HEMT noise wave model parameter determination
Authors: Djordjevic Vladica , Marinkovic Zlatica , Pronic-Rancic Olivera , Markovic Vera
Published: April 2017

This paper presents an analytical approach to determination of the noise wave
model parameters for a high electron-mobility transistor working under
different temperature and frequency conditions. The presented approach is
composed of two steps and provides more efficient determination of these
parameters than in the case of optimization procedures commonly applied for
that purpose in circuit simulators. The first step is extraction of the noise
parameters of transistor intrinsic circuit from the measured noise parameters
of whole transistor using an analytical noise de-embedding procedure. The
second step is calculation of the noise wave model parameters from the
de-embedded intrinsic noise parameters using existing formulas. The accuracy
of the presented approach is validated in a wide frequency and temperature
range by comparison of the transistor noise parameters simulated for the
determined noise wave model parameters with the measured noise parameters.
Measurement of definite integral of sinusoidal signal absolute value third power using digital stochastic method
Authors: Beljic Zeljko , Licina Boris , Sovilj Platon , Pejic Dragan , Vujicic Vladimir , Vujicic Bojan
Published: April 2017

In this paper a special case of digital stochastic measurement of the third
power of definite integral of sinusoidal signal?s absolute value, using 2-bit
AD converters is presented. This case of digital stochastic method had
emerged from the need to measure power and energy of the wind. Power and
energy are proportional to the third power of wind speed. Anemometer output
signal is sinusoidal. Therefore an integral of the third power of sinusoidal
signal is zero. Two approaches are proposed for the third power calculation
of the wind speed signal. One approach is to use absolute value of sinusoidal
signal (before AD conversion) for which there is no need of multiplier
hardware change. The second approach requires small multiplier hardware
change, but input signal remains unchanged. For the second approach proposed
minimal hardware change was made to calculate absolute value of the result
after AD conversion. Simulations have confirmed theoretical analysis.
Expected precision of wind energy measurement of proposed device is better
than 0,00051% of full scale.
Evaluation of different sunshine-based models for predicting global solar radiation – case study: New Borg El-Arab city, Egypt
Authors: Hassan Gasser , Youssef Elsayed , Ali Mohamed , Mohamed Zahraa , Hanafy Ahmed
Published: April 2017

The unavailability of the solar radiation measurements for different locations around the world leads to develop various empirical models to estimate the global solar radiation. In this consider, this study aims to investigate the performance of different solar radiation models to predict the monthly average daily global solar radiation on a horizontal surface. To achieve this, the measured global solar radiation data for a case study location are used. The model predictions are compared with the measured data to introduce the most accurate model for estimating the global solar radiation. The performance of each model is evaluated based on the different statistical indicators. The results show that the Robaa model has the best performance among the other models. Consequently, it can be used for estimating global solar radiation on a horizontal surface in the location under consideration. The accurate estimations of the global solar radiation using this approach can be used in the design and evaluation of performance for different solar applications.
Numerical study on heat transfer characteristics of nanofluid based natural circulation loop
Authors: Bejjam Ramesh , Kumar Kiran
Published: April 2017

In this paper the steady-state analysis has been carried out on single phase natural circulation loop with water and water based Al2O3 (Al2O3-water) nanofluid at 1%, 3%, 5%, and 6% particle volume concentrations. For this study, a 3-D geometry of natural circulation loop is developed and simulated by using the software, ANSYS (FLUENT) 14.5. Based on the Stokes number, mixture model is adopted to simulate the nanofluid based natural circulation loop. For the simulations, the imposed thermal boundary conditions are: constant heat input over the range of 200-1000 W with step size of 200 W at the heat source and isothermal wall temperature of 293 K at the heat sink. Adiabatic boundary condition is imposed to the riser and down-comer. The heat transfer characteristics and fluid-flow behavior of the loop fluid in natural circulation loop for different heat inputs and particle concentrations are presented. The result shows that the mass-flow rate of loop fluid in natural circulation loop is enhanced by 26% and effectiveness of the natural circulation loop is improved by 15% with Al2O3-water nanofluid when compared with water. All the simulation results are validated with the open literature in terms of Reynolds number and modified Grashof number. These comparisons confidently say that the present 3-D numerical model could be useful to estimate the performance of natural circulation loop.
Importance of on-time decision making in energy sector based on perspectives: Case study new Stavalj project
Authors: Zlatanovic Dragan , Pezo Lato , Sedmak Aleksandar , Kirin Snezana
Published: April 2017

Expression "Development conditions and perspectives" became important for numerous analyses in various industrial and social areas. Several strategic documents and studies in last two decades analysed projects with topics on perspectives of future development in Serbia. Various tools are used for development of such documents, based on recent scientific and numerical solutions, thus providing reliable assessment for strategic decision making. Almost all analyses tried to implement the theories and practical experiences through the prism of "sustainable development", which included establishment of most important sustainability parameters. Analysis and ranking presented in this paper considered the potential of the Stavalj coal deposit, near city of Sjenica in Serbia, and feasibility of construction project of new mine and thermal power plant. Basis for analysis was a hybrid assessment model which takes into account principles of sustainable development. The model incorporates quantified SWOT analysis, which applies to active underground mines in Serbia. Special attention was given to the parameters describing potential for development.
Optimized design for heavy mound venturi
Authors: Xing Futang , Li Yuheng , Mei Dan , Gui Shunfeng , Wang Liya
Published: April 2017

The venturi scrubber is one of the most efficient gas cleaning devices for removal of contaminating particles in industrial flue-gas purification processes. The velocity of the gas entering the scrubber is one of the key factors influencing its dust-removal efficiency. In this study, the shapes of the heavy mound and tube wall are optimized, allowing the girth area to become linearly adjustable. The resulting uniformity of velocity distribution is verified numerically.
Large-Eddy-Simulation of turbulent magnetohydrodynamic flows
Authors: Woelck Johannes , Brenner Gunther
Published: April 2017

A magnetohydrodynamic turbulent channel flow under the influence of a wallnormal magnetic field is investigated using the Large-Eddy-Simulation technique and k-equation subgrid-scale-model. Therefore, the new solver MHDpisoFoam is implemented in the OpenFOAM CFD-Code. The temporal decay of an initial turbulent field for different magnetic parameters is investigated. The rms values of the averaged velocity fluctuations show a similar, trend for each coordinate direction. 80% of the fluctuations are damped out in the range between 0 < Ha < < 75 at Re = 6675. The trend can be approximated via an exponential of the form exp(?a?Ha), where a is a scaling parameter. At higher Hartmann numbers the fluctuations decrease in an almost linear way. Therefore, the results of this study show that it may be possible to construct a general law for the turbulence damping due to action of magnetic fields.
Mathematical modelling of the sorption isotherms of quince
Authors: Mitrevski Vangelce , Mitrevska Cvetanka , Mijakovski Vladimir , Pavkov Ivan , Geramitcioski Tale
Published: April 2017

The moisture adsorption isotherms of quince were determined at four temperatures 15, 30, 45, and 60?C over a range of water activity from 0.110 to 0.920 using the standard static gravimetric method. The experimental data were fitted with generated three parameter sorption isotherm models on Mitrevski et al., and the referent Anderson model known in the scientific and engineering literature as Guggenheim- Anderson-de Boer model. In order to find which models give the best results, large number of numerical experiments was performed. After that, several statistical criteria for estimation and selection of the best sorption isotherm model was used. The performed statistical analysis shows that the generated three parameter model M11 gave the best fit to the sorption data of quince than the referent three parameter Anderson model.
Auditoria Médica y docencia en Medicina Familiar, un estudio antes y después en el Hospital de Pedro Vicente Maldonado.
Authors: Torres Fausto Gady , Troya Carlos , Carrasco Sergio
Published: April 2017

OBJETIVO:

Evaluar la intervención de Auditoria Medica en un grupo residentes de posgrado de Medicina Familiar.

MATERIALES Y MÉTODOS:

Se realizó un estudio exploratorio, en donde se incluyó una cohorte de médicos y fueron evaluados en un periodo de 6 meses. Se incluyeron 1060 revisiones de actuaciones clínicas y se aplicó el formulario de auditoria medica de terreno validado en Ecuador. La inclusión de casos fue aleatoria inicialmente y posteriormente intencionada, de acuerdo a los procesos de reauditoría, esto para garantizar mayor efectividad.

RESULTADOS Y DISCUSIÓN

Se revisaron cuentes principalmente ambulatorias, el nivel de conflictividad fue prácticamente nulo, existió aceptación del proceso de auditoria médica en un ambiente docente, el porcentaje de apelaciones fue bajo (menos del 0,5%) y la presentación de casos de interés genero reuniones proactivas, con alta madurez profesional y de discusión científica.

En la evaluación clínica, se inicia con un puntaje promedio de calidad de 70% y se finaliza con 88%. Se lograron mejoras en casi todos los campos, especialmente en manejo no farmacológico y Captación activa del riesgo de los pacientes. En el manejo legal de la información clínica, se parte de un puntaje alto (más del 90%) debido a que los formularios son electrónicos y tienen controles de registro.

CONCLUSIONES:

La tendencia observada es de mejoramiento, gracias a la personalización de las intervenciones por la administración del hospital, los residentes y Auditoria.

la aceptación del proceso por parte de los auditados es buena, gracias al enfoque cooperativo y no punitivo en un contexto académico.

Estos resultados son alentadores y confirman la validez, efectividad y eficiencia de los procesos de evaluación y monitoreo de la Calidad a través de Auditoria Medica integral en un medio docente. Es importante resaltar que el proceso debe ser continuo para lograr efectividad de la intervención.

PALABRAS CLAVE:

Auditoría médica, docencia, mejoramiento continuo, calidad
Cross-layer performance control of wireless channels using active local profiles
Authors: Moltchanov D.
Published: April 2017

To optimize performance of applications running over wireless channels state-of-the-art wireless access technologies incorporate a number of channel adaptation mechanisms. While these mechanisms are expected to operate jointly providing the best possible performance for current wireless channel and traffic conditions, their joint effect is often difficult to predict. To control functionality of various channel adaptation mechanisms a new cross-layer performance optimization system is sought. This system should be responsible for exchange of control informationbetween different layers and further optimization of wireless channel performance. In this paper design of the cross-layer performance control system for wireless access technologies with dynamic adaptation of protocol parameters at different layers of the protocol stack is proposed. Functionalities of components of the system are isolated and described in detail. To determine the range of protocol parameters providing the best possible performance for a wide range of channel and arrival statistics the proposed system is analytically analyzed. Particularly, probability distribution functions of the number of lost frames and delay of a frame as functions of first- and second-order wireless channel and arrival statistics, automatic repeat request, forward error correction functionality, protocol data unit size at different layers are derived. Numerical examples illustrating performance of the whole system and its elements are provided. Obtainedresults demonstrate that the proposed system provide significant performance gains compared to static configuration of protocols.
HWN* Mobility Management Considering QoS, Optimisation and Cross Layer Issues
Authors: Shen Chong
Published: April 2017

In this paper, we address mobility management for 4th generation heterogeneous networks from a quality of service (QoS), optimisation and cross layer design perspective. Users are classified as high profile, normal profile and low profile according to their differentiated service requirements. Congestion avoidance control and adaptive handover mechanisms are implemented for efficient cooperation within the mobile heterogeneous network environment consisting of a TDMA network, ad hoc network and relay nodes. A previous proposed routing algorithm is also revised to include mobility management.
On the Scalability of Addressing in Private Networks Using RPX
Authors: Rattananon Sanchai , Zhou Zhe Guang , Landfeldt Björn , Seneviratne Aruna
Published: April 2017

In recent times, the imminent lack of public IPv4 addresses has attracted the attention of both research community and industry. The cellular industry has decided to combat thisproblem by using IPv6 for all new terminals. However, thesuccess of 3G network deployment will depend on the services offered to end users. Currently, almost all services reside in the public IPv4 address space, making them inaccessible to users in IPv6 networks. Thus, an intermediate translation mechanism is required. Previous studies on network address translation methods have shown that REBEKAH-IP with Port Extension (RPX) supports all types of services that can be offered to IPv6 terminals from the public IPv4 based Internet, and provides excellent scalability. However, this method suffers from an ambiguity problem which may lead to call blocking. In this paper, we present an improvement to RPX scheme in which the side effect is removed and fully scalable system. Wefirstly show the expected number of public IPv4 addressesutilization to the DNS of RPX server. This utilization is computed in terms of the probability of socket open requests from mobile terminals, the probability of call blocking and the estimated number of mobile terminals at the network initialization phase. The mathematical model is also provided as a guideline to determine the range of public IPv4 addresses allocated to an RPX gateway in a cellular network. In addition, the results are presented through a set of simulations. However, we proposed theRPX scheme to use a simple round robin scheduling algorithm is sub-optimal in terms of call blocking probability and further propose to use a priority queue algorithm to improve the scalability. In addition, we present extensive simulation results on the practical scalability of RPX with different traffic compositions to provide a guideline of the expected scalability in large-scale networks such as 3G networks.
O Dilema de emissões de carbono: soluções podem vir de mercado ou de mudanças comportamentais?
Authors: Da Silva Luciano Ferreira , Guevara Arnoldo Jose De Hoyos , Fernandes Karina Ribeiro , De Oliveira Paulo Sergio Gonçalves , Saad Pedro Fernandes
Published: April 2017

This article aims to promote a discussion on environmental issues from the perspective of Evolutionary Theory (Nelson & Winter, 2005; Hodgson, 2007). Some evidence regarding carbon Market has been used, which is a common proposal for the reduction of Greenhouse Gases. An interdisciplinary and systemic perspective was developed based on areas of production, administration and economy as a background for the discussion of production and consumption conventional processes that seems to show that market solutions are not effective. Moreover, it is emphasized that the issues that motivate evolutionary theorists may help in the search for solutions closer to reality presented in this early twenty-first century. Thus, the forms and organizational routines are focused to understand the reasons to keep on a behavior harmful to the environment.
Competitividade da Indústria de Couro e Calçados de Sri Lanka
Authors: Kusum P.P. Ajith , Yinghua Song
Published: April 2017

This research paper explores the relationship among skills of entrepreneurs of leather  products and footwear industry in Sri Lanka and entrepreneurs’ involvement of innovations in product, process, raw material and market in the industry. Further, the survey investigates firms’ competitiveness and innovativeness in the industry. Database of firms in the industry available in Sri Lanka Industrial Development Board was used to administer an expert reviewed and piloted questionnaire among the population of firms. Personal interviews and a mail survey were undertaken which jointly brought above-average response rate of completed questionnaires used for analysis. The research has found that there is a strong link between skills of entrepreneurs and their involvement in innovations. Research has found that entrepreneur focus on product innovations rather than process, raw material and market innovations due to their low level of general education and the main mode of acquiring skills remains on-the-job-training. Usage of technology has been found to be lower level which has a negative effect on innovations. However, the entrepreneurs have a positive attitude towards innovations the relevant agencies can capitalize-on for expansion of the industry and increase competitiveness. The research unearths an intelligent view that in an efficiency-driven economy, what matters is productivity where skilling of entrepreneurs will yield enormous results for harnessing the potential of this ever growing industry.
Barreiras e dificuldades que podem ser encontradas no processo de implementação da governança corporativa nas empresass: um estudo do processo de gerenciamento e da divulgação das informações
Authors: Argentino Luiz Gustavo , Sousa José Luis de Medeiros , Nose Enio Tadashi , Petraglia Izabel Cristina , Rosini Alessandro Marco
Published: April 2017

This paper seeks to analyze the barriers and difficulties faced in the implementation and enforcement the best practices of Corporate Governance using the communication and dissemination of information identified in the researched articles that may confront the items in NVIVO 11 to find convergences that lead to relevance of the study. The comparison method used in NVIVO 11 was by analyzing the frequency of key words discussed in the article, to identify the strong presence of barriers and difficulties in the process of implementation Corporate Governance in companies, making a convergence with reasoned points on article. Based on data researched the article concluded that Corporate Governance is to use a number of practices in the organization to assimilate the relationship between directors, independent auditors, shareholders and board members, to direct the participation of all to achieve good results. We conclude that the barrier and communication within the Corporate Governance are issues that should be better exploited, as recommended in the best practices of Corporate Governance.
INTENSITAS KERJA AKTIVITAS NELAYAN PADA PENGOPERASIAN SOMA PAJEKO (MINI PURSE SEINE) DI BITUNG
Authors: Handayani Suci n , Wisudo Sugeng H , Iskandar Budhi H , Haluan John
Published: April 2017

There are factors of accident at sea in fishing activities which 80% caused by human errors (FAO 2009). The number of fishing vessel accidents within 7 years (January 2007-November 2013) in PPS Bitung occurred 40 times and tends to increase. There were accidents of six types of fishing vessels which majority soma pajeko (mini purse seine) that not recorded within 2010-2013 in Bitung. It is necessary to study fishermen safety on soma pajeko fishing operations because the number of fishermen is quite a lot. The research objectives are to identify and determine the work intensity of fishermen activity in soma pajeko operation which potentially cause work accident at sea. This research method is a numerical descriptive. Data were analyzed by identifying activities with Hierarchical Task Analysis (HTA). Study result shows that stages of soma pajeko activities at PPS Bitung sorted into 8 phases with total 58 activities. Number of crew on soma pajeko fishing vessel examined as 28 persons with the greatest portion of responsibility burdens is Captain. Total work intensity to perform all activities (beginning to end) on soma pajeko operation requires crew involvement/ power forces equivalent to 563 OA (men activity). The greatest primary work intensity is on the 5th stage (bauling) which showed the biggest activity level with primary work intensity index of 0.29. Involvement crew on bauling was the biggest intensity (139 OA) which potentially occurs the risk possibility of work accidents caused by human error that bigger than other activities.
KONSTRUKSI DAN PRODUKTIVITAS RUMPON PORTABLE DI PERAIRAN PALABUHANRATU, JAWA BARAT
Authors: Yusfiandayani Roza , Jaya Indra , Baskoro Mulyono S
Published: April 2017

Fish Aggregating Device (FAD) usually used by small and large scale fishermen in Indonesia are FAD shallow and deep sea water which fix in the water. Effectiveness and efficiency research activity about portable FAD in the water to catch Thunnus spp. and skipjack have never been done in Indonesia. This research divided into two stages : portable FAD design, fishing trial with portable FAD used handline and troll line in Palabuhanratu waters. The purpose of this research was to make portable FAD design, fishing trial used Electric Fish Attractor (EFA) with different frequency and to compared effectiveness of catch composition with handline and troll line. The result of this study were design FAD portable with length and width 1 m, the material is manglid wood, the attractors are raffia line and attractor and sinker line used PE with diameter 4 mm and tin sinker, EFA with frequency 10-1.000 Hz catch Caranx fasciatus and Trichiurus sp., whereas EFA with frequency 1.000-20.000 Hz catch 2 fish of Thunnus albacares with length 30 cm and weight 40 kg, catch composition used handline was Trichiurus sp. 63%, Nemiptarus sp. 10%, Caesio cuning 7%, Euthynnus spp. and semar 4%, Lutjanus spp. and Thunnus albacares 2%, whereas catch composition with troll line was Rastrelliger spp, Caesio cuning, and Selaroides spp. 1%.
DETEKSI SCHOOLING IKAN PELAGIS DENGAN METODE HIDROAKUSTIK DI PERAIRAN TELUK PALU, SULAWESI TENGAH
Authors: Achmadi Andi , Hestirianoto Totok , Manik Henry M
Published: April 2017

Yield and catch data obtained from statistic and fisheries commercial data are incomplete and inaccurate. Effort to increase the accurate data and survey method become necessary to estimate the yield potential in Indonesia. The aim of this study was to detect the pelagic schooling (target strength/TS approach) by using hydroacoustic. Those detection were used to describe insitu condition of pelagic fishes in Palu Bay, Central Sulawesi. Result of this study on depth strata, dominant schooling (12 schools) found in 100 to 150 m, then followed by 9 schools in 0 to 50 m and 2 schools in 50 to 100 m. Fish caught in Palu Bay that landed in Labuan Bajo fishing port dominated by large pelagic. Those information were relevant with the TS data. The longest size of skipjack was 74 cm in depth of 142 m. Medium size of the smallest value of 5 cm was in depth 57 m with an average size of 27.80 cm.
DAMPAK PEMUTIHAN KARANG TERHADAP EKOSISTEM TERUMBU KARANG PADA TAHUN 2010 DI PERAIRAN UTARA ACEH
Authors: Muttaqin Efin , Kamal Mohammad Mukhlis , Hariyadi Sigid , Pardede Shinta , Tarigan Sukmaraharja , Campbell Stuart J
Published: April 2017

A drastic increasing in Sea Surface Temperature (SST) was happened in Andaman Sea including in Aceh region from April through end of May 2010. The recent escalations of SST have caused mass coral bleaching event in many places in the world including northern Aceh water of Indonesia. Bleaching survey was conducted in Northern Aceh to measure ecological impact of bleaching including bleaching index, coral cover and reef fish abundance. More than 35% bleached coral were died, with tremendous mortality of susceptible genera such as Acropora and Pocillopora. Coral bleaching has impact in declining coral cover in Northern Aceh significantly after coral bleaching and the evidence of loss Acropora in some area. Coral bleaching also impact to coral fishes, where fishes abundance especially coralivorous fishes has declining significantly betwen 2009 and 2011 also 2013. The 2010 bleaching event is one of the most severe events reported for Indonesia including in Northern Aceh.
STRATEGI SISTEM PENANGANAN IKAN TUNA SEGAR YANG BAIK DI KAPAL NELAYAN HAND LINE PPI DONGGALA
Authors: Mboto Normawati K , Nurani Tri Wiji , Wisodo Sugeng Hari , Mustaruddin Mustaruddin
Published: April 2017

There is increasing demand for high quality products at a competitive price. Tuna is a prime commodity with strict quality standards. The research question addressed is whether the tuna handling system used by hand line fishermen operating out of Donggala fishing port (PPI Donggala) is still poor, affecting quality and thus lowering the market value of the fish they catch. The goal of this research was to contribute towards improvements in tuna handling by hand line fishermen from the Donggala fishing port. Thus the main benefit should be an improvement in the quality of the fish landed. The research was carried out during April-May 2014 at the Donggala fishing port in Central Sulawesi. Data were collected through observation and interviews. Data were collected from representative individuals through purposive sampling. Both primary and secondary data were collected. Analysis of data was undertaken with the approach strengths weaknesses opportunities threats (SWOT) analysis it of a training strategies the handling of the good fish on board. Based on of the analysis (SWOT) produced four strategies. The strategy was SO, ST, WO and the strategy WT. The fourth strategy is good to be applied, but see the position of the system is in a quadrant five (v), then the most appropriate strategy is WO and ST. The combination strategy WO are increased knowledge about the quality and skill handler’s tuna fish. Another thing that needs to be done that is the addition of the tools like ring tuna dan killing spike. Ring the functioning to hold the movement of the process of hauling and killing spike to deadly fish tuna. Combination strategy that is making ST it self standard operating prosedure (SOP) handling of good; as well as improving work competence.
LAMPU LED BAWAH AIR SEBAGAI ALAT BANTU PEMIKAT IKAN PADA BAGAN APUNG
Authors: Sulkhani Eko , Purbayanto Ari , Wisodo Sugeng Hari , Mawardi Wazir
Published: April 2017

Study on LED underwater lamp as fish aggregating device was conducted todesign and construct the LED underwater lights, to analyze strength of materials used, to analyze the light illumination value and distribution generated from the lamp, and to describe and analyze the test results of the underwater LED lights constructed. This study was divided into three stages, the material testing activities, designing and constructing the LED activities, and the field trials. Based on the results showed that the value of the maximum load that can be retained by the resin ranged from 914.27 to 1177.34 kgf/cm2. The value of the maximum load that can be held by acrylic ranges from 1238.65 to 1539.30 kgf/cm2. Design of instrument built for use in the water, with the material and acrylic resin as a protection/ waterproof. Designof the lamps weremade integrated with a CCTV camera system to facilitate the detection of fish. The LED lights used were a type of RGB High Power LED of 10 watt connected with waterproof driver adjustable step down CC-CV (QSKJ) led driver IN: DC.7-35V OUT: DC.2-30V. The number of drivers used were as many as 9 pieces, where the top of the lamp every 6 pieces of light connected with 1 driver for each color, while for the bottom of every 3 pieces of light connected with 1 pieces driver for each color. The results of measurements of the intensity of light at air showed medium that emits blue light, the most high intensity light than red and white. Type of fish caught during the 5 timesfishing trip was as much as 8 species, consisting of Auxis sp., Loligo sp., Rastrelliger sp., Trichiurus sp., Sardinella sp., Decapterus sp., and Leiognathus sp. The results of tests performed during 5 times fishing trip showed dominant catch of Leiognathus sp. as much as 288 species, and Loligo sp. as much as 266 species.