bluuebunny/crossref_metadata_2025 huggingface dataset:
Efecto de la Corriente y Longitud de Arco en Soldaduras con Arco Eléctrico Asistido por Modelado Matemático
Authors: Delgado J. A. , Argáez M. A. Ramírez , Mendez P. F.
Published: March 2018

A 2D mathematical model was developed for the GTAW arc welding process (Gas Tungsten Arc Welding). Computational simulations were performed by using the commercial software PHOENICS based on mass and momentum conservation equations as well as on Maxwell equations. The model predicts the electric characteristics of the arc column, flow patterns, temperature profiles, heat flux, total heat flow and the electrical potential, by varying the arc length and the applied current. By increasing the current the arc jet is stronger, hotter and provides more heat to the weld pool, while by increasing the arc length the maximum temperature, maximum velocity and heat flow are unchanged, although a short arc focuses the heat in a small area and a long arc spreads the heat in a wider area of the work piece.Keywords: Electric arc, heat transfer, fluid flow, mathematical modeling.
Estudio del Flujo Vehicular Mediante un Modelo de Lighthill-Whitham-Richards
Authors: Vasquéz Yolanda Maria , Laguardia Dr. José Javier
Published: March 2018

El tránsito vehicular tanto en carreteras como en redes urbanas ha representado un problema a resolver desde el segundo cuarto del siglo pasado debido al aumento del número de usuarios. Por esto, resulta sumamente importante crear modelos que permitan entender los fenómenos de tráfico.En este artículo se presenta como establecer un modelo macroscópico del flujo vehicular para simular el tráfico de forma que se disponga de una herramienta para la toma de decisiones. Finalmente se muestran los resultados obtenidos al aplicar el modelo sobre un caso de estudio como es el problema del semáforo.Palabras claves: Flujo vehicular, Modelo Macroscópico, Esquema de Lax-Friedrichs, Simulación Numérica
Data Processing on Large Interdependent Networks: An Application for Infrastructure Preparedness, and Restoration
Authors: Sianca Aniela Garay , Nurre Sarah G. , Salas Carlos L. Castro , Alvarez A. Humberto R.
Published: March 2018

This paper presents a method for validating and transforming data for use in interdependent infrastructure network analysis. Critical infrastructure are interdependent on each other for delivery of services and execution of restoration activities.  These interdependencies make infrastructure systems vulnerable to extreme events and highlights the needs for preparedness and response plans.  Optimization models have been used to create effective plans using interdependent infrastructure networks.  These models require accurate input data.  However, many data sources have inconsistencies or errors which inhibit the ability to use such optimization models.   This work identifies common errors in input network data and provides a method for processing and correcting these errors.  We demonstrate the effectiveness of this method on data representing the transportation network in Juan Diaz town, in Panama. Keywords: Data processing, network, infrastructure, interdependence.
Modelamiento Cinemático Aproximado de un Prototipo de Robot Equino de 6 Grados de Libertad Para un Simulador de Tiro
Authors: Ramírez Jaime Eduardo Andrade , Rubio Yeison Andrey Gómez , Rivera Diego Andrés Carranza
Published: March 2018

This article shows the design, analysis and manufacturing of one equine robot prototype with six degrees of freedom along with the development and implementation of control software. This software has the purpose to drive and to calculate the robot kinematics. All of this allows studding the elements necessaries to make a simulator of shots for riders that can be used in education areas as a tool of didactic support in the courses in the police national of Colombia, ensuring that the riders do not suffer physical and psychological injuries during their formation and avoiding hurting the horses in the training of that courses. In addition, the riders can interact and experiment of safety way every situation that they could find in real practice. The system is based on the kinematic study according to the Denavit-Hartenberg algorithm, approximate simulation using Kinematic-ARM® and the mathematic medeling in the Matlab® programming environment. All tecniques give aproximate results of location of the manipulator tool.    Finally, it is possible to validate and analising the results comparing the practical and theoric values to determine the TCP error estimated in each movement.Keywords: Direct kinematics, equine robot, Denavit-Hartenberg (D-H), Degrees of Freedom (DOF), Tool Center Point (TCP).
Finding Chemical Pathways Toward the Valorization of Automobile-Service-Station Wastes
Authors: Chauca Janina , Rosales María , Muñoz Diego , Banchón Carlos
Published: March 2018

Automobile-service-station wastes make for an acute environmental concern because they contain polyaromatic hydrocarbons, heavy metals, surfactants, and other harmful elements. An eco-friendly way to treat and take advantage of these wastes is embodied in the concept called "valorization". In the present work, valorization is described as a chemical process to remove solids from contaminated water and to stabilize oily sludge into a saponified product. Electrocoagulation and coagulation with aluminum were applied to separate oil-water emulsions and removed 99.7% of turbidity. Both coagulation processes obtained approximately 0.85 kg of treated water and 0.027 kg of dried oily sludge per kg of wastewater. A saponification process with dosages of 10% NaOH stabilized the dried oily sludge. In hopes of finding pathways to valorize wastes, chemical treatments with aluminum and NaOH obtained a product that can be used as a surfactant or as an energy source.Keywords: sludge, electrocoagulation, saponification, oil, wastewater
Método de RBF Aplicado a la Simulación de Transporte de Carga en CSO
Authors: Lucero Eric , Arrocha Idulfo
Published: March 2018

La búsqueda y el mejoramiento de fuentes alternas de energía es uno de los retos más importantes que actualmente enfrenta la humanidad. Dentro de las fuentes renovables, las celdas solares basadas en materiales inorgánicos han mostrado un gran desarrollo en los últimos años. Sin embargo, todavía es una tecnología que se encuentra en desarrollo, de ahí que el conocimiento de los procesos dinámicos de cargas es de gran importancia para su desarrollo. En este artículo nos proponemos estudiar los procesos de transporte de carga en dispositivos de celdas solares orgánicas mediante el modelado y la simulación numérica. Se presenta en este caso a las Funciones de Base Radial como un método eficiente para resolver las ecuaciones del modelo de Drift-Diffusion, el cual está formado con un sistema de ecuaciones diferenciales en derivadas parciales acopladas y con condiciones de contorno que conducen a discontinuidades que no son difíciles de modelar con otros métodos tradicionales. Palabras claves: Celdas solares orgánicas, Simulación numérica, Funciones de Base Radial, Modelo de Drift-Diffusion.
Monitoreo de Condición en Motores de Combustión Interna Monocilíndricos con Base en Adquisición y Procesamiento de Señales Experimentales
Authors: Torres M Daniela , Quintero R Héctor F. , López L Juan F. , Orozco G Álvaro A.
Published: March 2018

In recent years, condition monitoring based on signal analysis has become a valuable tool for the diagnosis of internal combustion engines. In this paper the experimental design for the ICE monitoring condition, based on signal analysis, is presented. The experimental configuration was development for the analysis of signals from ICE in order to monitor their condition. The conduced case study consists on the monitoring condition of a single-cylinder engine, operating under regular conditions and different speeds. The instrumentation, the adquisition systems as well as the signals analysis are also presented. The adquired signals were: engine block vibration, in-cylinder pressure and crankshaft speed. The mentioned signals were analyzed and processed by FFT and Rigid Regression. It was possible to obtain the frequency spectrum of the vibration signal and reconstruct the in-cylinder pressure of the single-cylinder engine. The presented configuration can be taken as a basis for the evaluation of others engines and for improving the schemes of monitoring condition.Keywords: Internal combustion engines, condition monitoring, signal acquisition, signal processing.
Automatic OSPF Topology map generation using information of the OSPF database
Authors: Navarro Manuel , Rangel José Carlos , Cruz Edmanuel
Published: March 2018

Nowadays, different technologies provide support to different areas of our diverse lifestyles around the world. Highly reputable companies are doing important research on the connectivity of multiple devices to the different types of network. The open Short Path First Protocol (OSPF) is one of the most widespread routing protocols in communications. Through experience, it has been demonstrated that this protocol usually has flaws, either by causes outside the protocol or by configuration, so network administrators should monitor and revise the operation of that protocol. Generally, when you start tracking a network already deployed that uses the OSPF routing protocol, there is very little documented information or even, none of the existing topology, not only because of the dynamism of this connectivity protocol, but also because of the lack of documentation of the installation itself. This project proposes the development of a tool for the generation of a map of the topology of a simple area of the OSPF routing protocol, which will facilitate the establishment of an OSPF area's topology documentation.Keywords: Network logical topology, OSPF, network modelling and mapping.
Ensino de Química em diferentes contextos sociais
Authors: Santos Bruno Ferreira dos
Published: March 2018

Este artigo apresenta o desenvolvimento de um programa de pesquisa sobre o ensino de Química orientado por um marco teórico da Sociologia da Educação, e discute seus principais resultados. Sob uma perspectiva de análise comparativa, as práticas pedagógicas de professores de Química que ensinam em escolas de diferentes contextos sociais foram caracterizadas por um conjunto de indicadores relacionados com as regras do discurso pedagógico e associadas às questões macros sociais de poder e de controle, de acordo com a teoria de Basil Bernstein. O artigo apresenta os resultados mais relevantes obtidos, destacando as características menos favoráveis à aquisição dos conhecimentos e competências científicas e que, muitas vezes, constituem as práticas observadas nas escolas onde estudam os estudantes mais carenciados do espectro social. Por outro lado, alguns resultados também demonstram que, ao alterar algumas dessas características, professores conseguem elevar o desempenho dos estudantes. Estes resultados trazem implicações para a formação de professores de Química e para as políticas públicas. Na parte final, discutem-se os desdobramentos e direções para pesquisas futuras relacionadas com este programa.
The use of two different vaccines in the treatment of Anatolian buffaloes with trichophytosis
Authors: Birdane F. M. , Kabu M.
Published: March 2018

The aim of this study is to compare the treatment effectiveness of two different fungal vaccines on Anatolian buffaloes with trichophytosis. 40 Anatolian buffaloes with ranging ages from 4 months to 4 years were divided into two groups after being clinically and microbiologically diagnosed as trichophytosis. 10 cc of intra muscular (IM) Trichoben (Bioveta) was applied to Group I (n=20) while 10 cc of IM LTF 130 (Stavropolskaya Biofabrika) was applied to Group II (n=20). In group I, improvement started after the vaccine was applied twice in every 14 days, and in group II, the improvement started after the vaccine was applied 4 times in every 14 days. Following the vaccine application in group I, the lesions on the skin disappeared and hairing started on the 40th day, however, in group II this happened on the 65th day. While both vaccines cured this disease in Anatolian buffaloes with trichophytosis, the improvement in group I happened faster than group II. As a result, we think that vaccination will be beneficial for the treatment of Anatolian buffaloes with Trichophytosis.
Molecular characterization of universal Mycoplasma and Acholeplasma laidlawii from buffaloes (Bubalus bubalis) at Karachi, Pakistan.
Authors: Fareed Syed Khurram , Muhammad Faiz , Muhammad Javed , Rabbani Masood , Khan Taseer Ahmed , Kachiwal Allah Bux , Khan Shakeel Ahmed , Ahmad Aqeel
Published: March 2018

The present study was conducted to identify and characterize the bovine Acholeplasma laidlawii from 1120 clinically ill buffaloes and 470 lungs collected from buffaloes at abattoir of Karachi. All buffaloes were clinically examined and around 467 (13.48%) buffaloes had signs of respiratory distress including sticky nasal discharge, sunken eyes, dyspnea and fever. All the culture positive samples were further evaluated by PCR using specific primers of A. laidlawii and the amplified product to re-validate the sequence of the specie. This revealed that suspected buffaloes, 92 (2.66%) from nasal discharge and 44 (4.03%) from lung tissue samples respectively were positive for A. laidlawii. Rests of the samples were still under investigation. However it is first time proclaimed on research basis that A. laidlawii was infecting the buffaloes in Pakistan and precautionary measures should be taken to prevent losses from this specie in the months of October and April.
Los Apuntes de los alumnos: estilos, usos y sentidos en la construcción del conocimiento
Authors: Pérez Ana M. del Pilar
Published: March 2018

El presente artículo, síntesis sobre la investigación realizada en el marco de la tesis de Maestría en Educación, pretende posibilitar una visión más amplia de la toma de apuntes -note taking-, a nivel terciario, reconocido soporte en el acercamiento al conocimiento. La dinámica de los apuntes es explorada en profundidad abordando: estilos, modelos, usos, y esencialmente, la implicancia que podrían tener en la construcción del conocimiento, promoviendo conceptualizaciones, o beneficiando su adquisición. Comprendemos que, las categorías reconocidas que hacen a la “sustantividad y claves” ubicadas en la dimensión “Contenidos” entre otras, no se agotan en su contexto. Reconocemos la vinculación de los apuntes con diferentes aspectos del contexto anotador, e identificamos como central su relación con ”estrategias de fondo” y "pausa reflexiva". Aspiramos fecunden en una toma de apuntes que canalicen la elaboración de constructos genuinos en nuestros jóvenes. Finalmente, nos cuestionamos respecto al lugar que les correspondería en la agenda didáctica, empeñados en optimizar las prácticas de los estudiantes.
Exploring the Experiences and Perceptions of Women About Childbirth at Birthing Centers in Karachi, Pakistan
Authors: Akhtar Nasim , Shahid Shahnaz , Jan Rafat , Lakhani Arusa
Published: March 2018

Objective:

The purpose of this study was to explore the perceptions of women about childbirth experiences at the birthing centers (BCs) in Karachi, Pakistan.

Design:

A qualitative descriptive exploratory approach was employed using semistructured interviews.

Participants:

A purposive sample of eight women who had used BCs was enrolled from each site.

Findings:

Five themes emerged from content analysis including: (a) satisfaction with BC, (b) provision of homely environment, (c) promotion of normalcy, (d) facilitation of family support, and (e) protection of privacy.

Key Conclusions:

Overall, the findings of the study revealed that women who used BCs were satisfied with the services and the environment provided to them by the midwives during the antenatal, intranatal, and postnatal periods. Most of the women appreciated the privacy offered at the BCs. They considered BCs as a safe, accessible, and affordable option for childbirth and encouraged others in the community to opt for it.

Implications for Practice:

The findings of this study may help to advocate for births at BCs and provide women-friendly maternity care, by giving choice and control to women during childbirth, providing comfort to women by using fewer medical interventions, and promoting normalcy by attending spontaneous vaginal delivery.
A Research On Practical Significance Of Productivity Theory In Consumption Society
Authors: Wang Jifu , Diao Yuzhu , Li Xisheng , Lybolt Liza
Published: March 2018

This paper systematically elaborates the theory of productivity in consumption society, the mainstay theory in Dr. Bingxin Wu’s (Wu, 1997, 2008, 2011, 2013, 2015 & 2017) comprehensive consumption theoretical system.  An analysis on history and current academic situation of the western consumption theory is employed to explore the defects and shortages of the existing consumption theory.  The emphasis of the paper is on the academic significance and practical significance of the consumption society productivity.  The paper also explains in detail the practical importance of productivity theory in guiding consumption society and provides evidences discovered from the continuous rapid development of the Chinese economy.
Institutional Monitoring Of Sticky CEO Compensation
Authors: Yang Daecheon , Mo Kyoungwon
Published: March 2018

This study examines the monitoring role of institutional investors in both mitigating the degree of downward-sticky CEO compensation and alleviating the undesirable effects of the sticky compensation on shareholder wealth. Particularly, we parallel the literature on “pay for performance” and institutional monitoring role to critically examine the measure of fluctuating pay-for-performance sensitivity, re-characterize the asymmetric compensation-performance link, and then capture managerial rent extraction. We find that sticky CEO compensation is significantly and negatively associated with firm value. Further, we find that institutional ownership decreases the compensation stickiness in underperforming firms and ameliorates its value-deteriorating effect.
PENGARUH FAKTOR FUNDAMENTAL TERHADAP HARGA SAHAM PERUSAHAAN YANG TERDAFTAR DI LQ 45 BURSA EFEK INDONESIA
Authors: Firmansyah Farid
Published: March 2018

Regression based estimation  or prediction on the stock price can be done traditionally and in a modern way. In this research it is done traditionallywith regard to instrinsic/ fundamental values of the company. Traditionallysome literature uses PER as a model of estimation, but this model have weaknesses if the Analyst or the share owners do not know how to read the financial report or they just trust the numbers on the report. The alternative way to use a model of estimation in this research considered the DER, ROA and ROE variables. This research used a quantitative research. The population of this research is 45 companies. The kind of data used is secondary data.  The data analysis used is Double Linier Regression Analysis. The result of the research is the validity  test show that the Communality number is higher than Rule of Thumbs in the point of 0,5 (table 4.4) which identifies that the regression equation made do not have multikoliniarity and the regression is able to estimate correctly (table 4.5). it has F-test and it is significant in 0,000, so that   it can be concluded that the model made does not have independent variable which influence the dependent one. In this research, the researcher deleted the free variable DER. This is because the researcher wants a model with estimation that can predict as exact as possible. Therefore, the regression equation is: the stock price = 1097.090 + 1141.427 ROA + 5407.516 ROE. The conclusions of this research are, (1) the result of F test shows that the regression model can be used to predict the stock price. In another word, the independent variable consists of ROA and ROE, some or all of its independent variables influence their dependent variable which is the stock price. (2) t Test of ROA and ROE have a positive effect on the ROE stock price. (3) ROA and ROE can explain 86, 7% effect on the stock share.
FENOMENA SURROGATE MOTHER (IBU PENGGANTI) DALAM PERSPEKTIF ISLAM DITINJAU DARI HADIS
Authors: Rahmawati Nurul Alifah , Susilawati Hirma
Published: March 2018

In this modern era, there is a finding in technology in the field of genetically changes which try to help the married couple with no children for a long time of marriage. This change can be seen in the existence of an infant with infitro fertilization, sperm banks, or magic box that can save sperm and ovum as they are in the real womb. As the time is gone, the practice of infant with  infitro fertilization and artificial insemination have developed in some forms of activity which are forbidden in Islam. One of the forbidden forms is infitro insemination or artificial insemination which uses the sperm and ovum from a marriage couple and put it in another woman’s womb. This practice is called as Surrogate Mother. Actually there is no verses in the al-Qur’an which strictly stated about the prohibition on the practice of infitro infant using another woman’s womb (Surrogate mother). But it does not mean that al-Qur’an does not give any solution and also guidance in solving the law of this problem. There are some syar’i theorems that can be used as references in the issue of surrogate mother, for example Q.S Maryam verse 3-5 which give us command to keep praying and trying to get descendents, Q.S al-Baqarah verse 223 which states that a wife is the best place for farming and also hadith of the prophet Muhammad SAW which forbid a man to give his sperm to another woman who is not their wife. Moreover, the practice of this surrogate mother is also contradictory with with al-maqasid al-shariah because it can cause a mixed Nasab. Based on those reasons, the writer is interested in analyzing how is the surrogate mother phenomenon in the view of hadith and its contextualization dealing with the children’s position in the law of Waris (inheritance). Based on the literature analysis done by the writer, it can be concluded that the practice of surrogate mother is forbidden according to Ulama because it gives more mudharat (negative effects) than Manfaat (Positive effect). The hadith used belongs to Hasan hadith with 48,9% percentage. While talking about the child’s position born through surrogate mother, they will be called as adopted children who substitute the position of their own children although they get the sperm and ovum from the real parents.
PENERAPAN METODE INTERACTIVE DEVELOPMENT DALAM PEMBELAJARAN KETERAMPILAN BERBICARA DI MERCURY EDUCATION CENTRE (MEC) PAMEKASAN
Authors: Ayuanita Kristanti
Published: March 2018

The purpose of this study is to know how is the application of Interactive development method in teaching speaking skill in Mercury Education Centre (MEC) Pamekasan, what are the difficulties in applying interactive development method in teaching speaking skill in Mercury Education Centre (MEC) Pamekasan. The researcher uses qualitative approach with descriptive kind of research. The data collection means are observation, interview, field notes and data documentation. To check the validity of the data, the researcher uses the techniques of  longer observation, triangulation. The research result show that the interactive development method started with giving motivation in the beginning and the end of the class. After that the students are given some minutes to pronounce vocabulary and to make sentences to do debate or presentation. While the difficulties faced are the different ability to memorize words, the large amount of the students in a class, the students’ condition, and also the different atmosphere between the school and Mercury. The effort done by the teacher coping these difficulties are giving more motivation, giving reward or appreciation, making the target system arranging to send the mentor to go on seminar on it.
Positive and Negative Emotions and Nonattachment in Vietnamese Buddhists
Authors: Nguyen Hang T. M. , Nguyen Hoang V.
Published: March 2018

Several research has shown that nonattachment, a Buddhist practice, could reduce negative emotions and improve positive emotions (Sahdra & Shaver, 2013; Sahdra, Shaver, & Brown, 2010; Wang, Wong, & Yeh, 2016; Wendling, 2012). We aimed to explore such influences in a sample of Vietnamese Buddhists (N = 472). Our methods included the State Trait Anxiety Inventory (STAI; Spielberger et al., 1983), the Nonattachment Scale (NAS; Sahdra et al., 2010), and a demographic and religious questionnaire. Results showed that positive emotion scores (M = 2.89, SD = .502) of participants were significantly higher than that of their negative emotion scores (M = 2.10, SD = .587, p < .001). People with strong religious commitment such as monks, lay-people who practiced at pagoda, and lay-people who practiced with sangha had higher positive emotion scores and less negative emotion scores than those whose religious commitment were weak. Nonattachment was positively correlated with positive emotions (r = .47, p < .01) and negatively correlated with negative emotions (r = -.37, p < .01). Nonattachment could also explain 21.7% positive emotions variance (p < .001) and 12.4% negative emotions variance (p < .001). Nonattachment and religious commitment could, therefore, influence greatly positive emotions in Buddhists. This result suggested a discussion about applying nonattachment to prevent emotional problems and improve psychological well-being.
Shaping Light in Backward-Wave Nonlinear Hyperbolic Metamaterials
Authors: Popov Alexander K. , Myslivets Sergey A. , Slabko Vitaly V. , Tkachenko Victor A. , George Thomas F.
Published: March 2018

Backward electromagnetic waves are extraordinary waves with contra-directed phase velocity and energy flux. Unusual properties of the coherent nonlinear optical coupling of the phase-matched ordinary and backward electromagnetic waves with contra-directed energy fluxes are described which enable greatly-enhanced frequency and propagation direction conversion, parametrical amplification, as well as control of shape of the light pulses. Extraordinary transient processes that emerge in such metamaterials in pulsed regimes are described. The results of the numerical simulation of particular plasmonic metamaterials with hyperbolic dispersion are presented, which prove the possibility to match phases of such coupled guided ordinary and backward electromagnetic waves. Particular properties of the outlined processes in the proposed metamaterial are demonstrated through numerical simulations. Potential applications include ultra-miniature amplifiers, frequency changing reflectors, modulators, pulse shapers, and remotely actuated sensors.
The Effect of Environmental Conditions on the Physiological Response during a Stand-Up Paddle Surfing Session
Authors: Suari Yair , Schram Ben , Ashkenazi Adva , Gann-Perkal Hadas , Berger Lev , Reznikov Meshi , Shomrat Shmuel , Kodesh Einat
Published: March 2018

Stand Up Paddleboard (SUP) surfing entails riding breaking waves and maneuvering the board on the wave face in a similar manner to traditional surfing. Despite some scientific investigations on SUP, little is known about SUP surfing. The aim of this study was to investigate the physiological response during SUP surfing sessions and to determine how various environmental conditions can influence this response. Heart rate (HR) of an experienced male SUP surfer aged 43 was recorded for 14.9 hours during ten surfing session and synced with on board video footage to enable the examination of the effect of different surfing modes and weather conditions on exercise intensity. Results indicated the SUP surfer's HR was above 70% of HRmax during 85% of each session, with the greatest heart rates were found during falls off the board (~85%HRmax) and while paddling back to the peak (~83%HRmax). Total time surfing a wave was less than 5% with the majority of time spend paddling back into position. Wind speed positively correlated with HR (r2 = 0.062, p = 0.012) and wave height negatively correlated wave caching frequency (r2 = 0.54, p = 0.025). The results highlight the aerobic fitness for SUP surfing, that wave riding, paddling back to the peak and falls appear to be associated with the greatest cardiovascular demand and that environmental conditions can have an effect of physiological response during SUP surfing sessions.
On the Expansion of Space and How to Measure It
Authors: Oliveira Firmin J.
Published: March 2018

We describe the effect of the expansion of space on the wavelength of the light beam in a Fabry-Pérot interferometer. For an instrument such as the Laser Interferometer Gravitational-Wave Observatory (LIGO), which has high sensitivity and a long period of light storage, the wavelength λ L of laser photons are redshifted due to the expansion of space in each cavity by an amount δ λ given by δ λ / λ L = H 0 τ s ≈ 8 . 8 × 10 - 21 , where H 0 ≈ 2 . 2 × 10 - 18 s - 1 is the Hubble constant and τ s ≈ 4 ms is the light storage time for the cavity. Since τ s is based on the cavity finesse F which depends on the laser beam full width at half maximum (FWHM) δ ω of each cavity, we show that a difference in finesses between the LIGO arm cavities produces a signal h H ( t ) at the anti-symmetric output port given by h H t = 2 a 1 H 0 1 δ ω X t - 1 δ ω Y t , where δ ω X ( t ) and δ ω Y ( t ) are the beam FWHM at time t, respectively, for the X and Y arm cavities and a 1 is a beam proportionality constant to be determined expermentally. Assuming a 1 ≈ 1 , then for cavity beams FWHM of δ ω ( t ) ≈ ( 523 . 2 ± 31 ) rad . s - 1 the output signal has the range ∣ h H ( t ) ∣ ≤ 1 × 10 - 21 , which is detectable by advanced LIGO.
Performance Evaluation of Dimoro Irrigation Area Based on Rating Scale Methods
Authors: Anugrah Dian Retno , Sobriyah Sobriyah , Handayani Dewi
Published: March 2018

Sustainable operation and maintenance activities determine durability and success level of irrigation infrastructure. Success indicator of irrigation such as increasing of water usage efficiency, increasing of plant intensity, decreasing of water distribution conflict, increasing of agricultural production result and decreasing of dryness of plant. Therefore, it is necessary to have research to determine the performance of irrigation operation that had been carried out from 2013 – 2106 at Dimoro Irrigation Area. The Dimoro operational data records 2013 - 2016 were analyzed by simple weighting for each indicator, then analyzed to obtain performance for each year. The results showed that the operation irrigation at Dimoro Irrigation Area tend to succeed if seen from its performance that rises.
Feasibility analysis of micro hydro plant at nawangan village of pacitan district
Authors: Bayu Diana Dellariam , Hadiani Rintis , Solichin Solichin
Published: March 2018

Nawangan Village of Pacitan District utilizes Kedung Pasang Micro Hydro Plant (MHP) as a power source, but the existing electricity power unable suffice the demand so it needs revitalization by calculating the new unit price and debit because of the previous reference already invalid. The problem is that the investment required for the construction of the MHP must provide benefits for a certain period. This study analyzed the ratio of power and energy potential of MHP with changes in pipe diameter and speed of existing turbines, and calculated the cost. The available power is currently at 112.5 kW and energy is 82150.66 kWh. The results of the analysis show that the power increase can be done up to 142,95 kW a year or equivalent 218%, the energy can be done up to 139.427 kWh a year, meanwhile the benefit is Rp44.566.169, increase Rp26.604.588,- from existing condition or equivalent 148,1% which is done by changing the diameter of penstock and the turbine. Economic analysis of Kedung Pasang MHP development plan shows NPV of Rp6.717.110,- that is greater than 0, the value of IRR is 11% greater than the interest rate set by Bank Negara Indonesia 46 of 10,25% and BCR value of 1,19 is greater than 1, thus the revitalization of Kedung Pasang MHP feasible to be implemented.
Teaching Style and Mental Representation of Teachers in Biology Learning Using Convention Picture
Authors: Ramadhan F , Rahmat A , Nuraeni E
Published: March 2018

Activities of teacher’s working memory in representing a picture are important in the teaching and learning process. This study aimed to reveal the tendency of teacher’s mental representation and teacher’s teaching styles in biology class using convention pictures. This research used descriptive method. The research was conducted by involving four high school biology volunteer teachers of grade XI from four schools in Lebak, Banten, Indonesia. Teacher’s teaching styles were measured by questionnaires and rubrics adapted from Grasha and teacher’s mental representations were measured using worksheets and rubrics developed based on the Causal Network Elicitation Technique (CNET) model. The data obtained were analyzed qualitatively. The results showed two dominant teacher teaching styles; there were expert style and facilitator style. The mental representation of teachers when reading convention picture was in the category of good (2 teachers), adequate (1 teacher) and inadequate (1 teacher). A teacher with expert teaching style tends to have a good mental representation compared to a teacher with facilitator teaching style.
Improving ability mathematic literacy, self-efficacy and reducing mathematical anxiety with learning Treffinger model at senior high school students
Authors: Nizham Hafizh , Suhendra Suhendra , P. Bambang Avip
Published: March 2018

This study is a Quasi Experimental study with the design of The Pretest-Post-Test Non-Equivalent Group Design. Population in this research is all student of class X SHS in South Jakarta. Sampling is done by purposive sampling, to obtain an experimental class and control class. In the experimental class, students learn with Treffinger learning model and control, class learning with conventional learning. This study is also to examine the differences of self-efficacy improvement and students literacy skills, and decreased students' mathematical anxiety. Also, this study also examines the relevance of early mathematical abilities (high, medium, low) with improving students' math literacy skills. The instrument used in this research is literacy skill test, self-efficacy scale, mathematical anxiety scale, observation sheet, and student interview. Data were analyzed by t-test, one-way ANOVA, and two lines. From the results of the data, it is found that: (1) The improvement of literacy ability of students who are learned with Treffinger model learning is not significantly higher than students who learn with conventional. (2) The self-efficacy of students who learning with the Treffinger model learning  is better than the student that is learning by conventional. (3) The mathematical anxiety of students learning with Treffinger model learning reduces better than students learning with conventional. (4) There is a difference in the improvement of students' mathematical literacy skills learning by learning the Treffinger model and students learning with conventional learning based on early mathematical abilities. (5) Student response to Treffinger model learning is better than students learning with conventional learning. Therefore, learning model Treffinger can be an alternative model of learning to improve students' mathematical literacy skills, and self-efficacy students, and able to reduce mathematical anxiety.
The Effect of WhatsApp Messenger As Mobile Learning Integrated with Group Investigation Method of Learning Achievement
Authors: Pratama Hendrik , Kartikawati Sulistyaning
Published: March 2018

The purpose of this research was determined the effect of application WhatsApp Messenger in the Group Investigation (GI) method on learning achievement. The methods used experimental research with control group pretest-postest design. The sampling procedure used the purposive sampling technique that consists of 17 students as a control group and 17 students as an experimental group. The sample in this research is students in Electrical Engineering Education Study Program. The experimental group used the GI method that integrated with WhatsApp Messenger. The control group used lecture method without social media integration. The collecting data used observation, documentation, interview, questionnaire, and test. The researcher used a t-test for compared the control group and the experimental group’s learning outcomes at an alpha level of 0,05. The results showed differences between the experiment group and the control group. The study result of the experimental higher than the control groups. This learning was designed with start, grouping, planning, presenting, organizing, investigating, evaluating, ending’s stage. Integration of WhatsApp with group investigation method could cause the positive communication between student and lecturer. Discussion in this learning was well done, the student’s knowledge could appear in a group and the information could spread evenly and quickly.
Anti-hypercholesterolemia effects and quality of eel (Anguilla bicolor) oil
Authors: Sasongko Heru , Sugiyarto Sugiyarto , Budiharjo Agung , Efendi Nur Rohman
Published: March 2018

Eel (Anguilla bicolor) is a general fish consumption in many countries. Besides its vitamin rich, eel oil is also known to contain fatty acids like oleic acid and palmitic acid.  That is necessary for traditional medicine and as food a supplement. It is known that polyunsaturated fatty acids are recognized to lower blood cholesterol. In this study, fresh eels were extracted using reflux methods. The study was conducted on rat test animals given high-fat diet and PTU (Propylthiouracil). Treatment was given eel fish oil with dose 0.5 ml / kg BW; 1 ml / KgBW and 2 ml / KgBW. The results of eel extraction showed that the metal content is undetectable except Zn metal 11.72 ppm. Eel fish oil affects the total cholesterol decrease at each dose (h <0.05). Known percent increase in total cholesterol after 14 days at a dose of 0.5 ml / kg body weight (-14.10%); 1 ml / kg BW (2.12%) and 2 ml / kg BW (11.37%).
Descriptive study of the kinds of questions asked by novice teacher on mathematics learning process
Authors: Zahra Labiba , Kusmayadi Tri Atmojo , Usodo Budi
Published: March 2018

This study described the kinds of a question asked by novice teacher on mathematics learning process of senior high school. The data were collected by passive participation observation and a semi-structured interview. The validity of data was obtained through the triangulation of method, triangulation of time and member check. The data analysis technique used in this study is descriptive analysis. The result of this study showed that at the preliminary activity, the question asked by the novice teacher based on objective only compliance question. At the main activity, the novice teacher asked compliance question, prompting question, probing question and sometimes rhetorical question. The kind of questions based on the cognitive dimension of Revised Bloom’s Taxonomy that was asked by novice teacher only remembering question. At the main activity, the novice teacher asked the question of remember, understand, apply, analyse and evaluate. At the closing activity, the teacher does not ask the question based on objective and Revised Bloom’s Taxonomy. 
Maintenance and Rehabilitation Prioritization of School Buildings Using Knapsack Problem
Authors: Thohir Muhammad Abu , Sangadji Senot , As'ad Sholihin
Published: March 2018

Many of the public buildings are in conditions of distress due to deterioration and damage and require maintenance and rehabilitation to be able to function appropriately. On the contrary the government funding and budget allocated is limited. A systematic approach to overcome the problem is using setting up priority and optimize the resources allocation. Within a budget ceiling the what buildings components should be prioritized to achieve maximum profit and or surpass threshold is the ultimate goal of the decision maker and stakeholders. In this study, optimizing budget allocated for maintenance and rehabilitation of building components may be carried out by implementing knapsack algorithm within dynamic programming framework. The public junior high school 4 (SMPN 4) building was chosen as case study to apply the algorithm and determine the priority scale. The building is in Salatiga and suffers from some material deterioration as well as structural component degradation. The school building consists of three main sections namely, building itself, school yard, and school fence. To assess and evaluate damage based on the criteria set by Ministry of National Education, the building is divide into structures, architecture, and utilities. These components were divided into elements and sub elements. The structure was divided into the roof structure, super structure above the ground, and substructure (foundation). The damage condition of components and sub components of the building was then tabulated by assigning weights according to criteria set by office of education of Salatiga (Dinas Pendidikan Kota Salatiga, 2017)
The Use of BBC (Box, Board, and Comics) Media in The Systems of Linear Equation
Authors: Widyastuti P D , Mardiyana M , Saputro D R S
Published: March 2018

Mathematics is one of the lessons in school. Starting from elementary school, junior high school, senior high school, even college. Mathematics is abstract and identic with numbers, so the author guessed that maybe this is the reason why students consider that mathematics is a difficult lesson. In fact, the learners deliver the material step by step. First, the teacher introduced something concrete to the students (related to the surrounding environment). After that, teacher introduced something more abstract to the students. Sometimes, the transition from concrete to abstract become the problem in the learning process. One of the materials that convert concrete to abstract is systems of linear equations in 8th grade because in this stage students are introduced to more coefficients and variables. This article will discuss how to use media in the form of BBC (Box, Board, and Comics) on systems of linear equations. This research is about Research and Development (R &D). The procedures of comics followed the ADDIE model which included analysis, design, development, implementation, and evaluation. This research aims to create a valid media based on the validation by the and students’ responses which can be proven that BBC (Box, Board, and Comics) media are interesting and worthy to use in the classroom.
Allocation Priority Determination System for Provincial Bridge Maintenance Fund in Special Region of Yogyakarta By Examining Physical Conditions, Operational Cost and Volume of Traffic
Authors: Abdillah Rifqi Aulia , As’ad Sholihin , Sangadji Senot
Published: March 2018

The maintenance of bridges is relatively expensive. Those may lead the maintenance program into a classical problem which is limited of the fund. Therefore, the priority level of bridges maintenance is needed in order to attain an effective and efficient fund usage toward prevalent condition of every bridges in Special Region of Yogyakarta. The objective of this research was to provide the maintenance fund for provincial bridges in Special Region of Yogyakarta. The research covered 10 bridges in Special Region of Yogyakarta. The Assessments method for bridge physical condition was based on guide of Bridge Management System (BMS). As the bridge physical condition was known, the maintenance measure and its needed maintenance cost can be determined. The allocation of fund for each bridge was calculated based on Dynamic Programming Method. The result can be draw that by 5 million rupiah the maintenance fund for each of those 10 bridge of Yogyakarta Special Region is 5 million rupiah for Demak Ijo Bridge, 13 million rupiah for Bedingin Bridge, 10 million rupiah for Denggung Bridge, 5 million rupiah for Ngentak Bridge, 5 million rupiah for Karang Semut Bridge, 8 million rupiah for 2rd Kronggahan Bridge, 7 million rupiah for Besi Bridge, 8 million rupiah for Cebongan Bridge, 2 million rupiah for Kembang Songo Bridge, 2 million rupiah for 1st Kronggahan Bridge. Those allocation system provide 78,7% an average percentage on provincial bridges in Special Region of Yogyakarta. 
Integer 1/0 Knapsack Problem Dynamic Programming Approach in Building Maintenance Optimization
Authors: Fawzy Viska Dewi , Sangadji Senot , As’ad Sholihin
Published: March 2018

The most common problem in urban areas is the high public demand and the limited provision of housing. In meeting the needs of affordable housing for low income communities, the Government of Indonesia implements Rusunawa Project. Object of this research is Pandanarang Rusunawa. Rusunawa Pandanarang is one of the vertical housing in Cilacap that is facing deterioration issue and needs good maintenance management. This study aims at insetting priority and optimizing maintenance plan due to limited funds (limited budget) and the amount of damage that must be repaired.This study uses one of the optimization methods of Dynamic Programing on the application of Integer 1/0 Knapsack Problem, to determine an schedule the maintenance activities. The Criteria that are used such as: the level of building components damage and the level of occupants participation. In the first criterion, the benefit (p) is the percentage of damage that is fixed with the cost (w). While on the second criterion, the benefit (p) is the percentage of occupant participation rate on the maintenance activities with the cost (w). For the budget of Rp 125.000.000, 00, it was obtained from the simulation that the value of the optimum solution on the first criterion at the 7th stage of 71.88% with total cost Rp 106.000.000, 00. At the second criterion, the value of the optimum solution at the 7th stage of 89.29% with total cost Rp 124.000.000, 00.
Analysis of students’ quantitative literacy in human coordination system concept
Authors: Harianto Yuda , Saefudin Saefudin , Nuraeni Eni
Published: March 2018

This study aimed to measure and analyze students’ quantitative literacy (QL) in human coordination system concept. It involved 76 participants (16-17 years old) from the second grade of senior high school at two national schools in Subang, West Java, Indonesia. These participants consisted of 39 males and 37 female students. Their QL was assessed by four essay tests to examine their QL indicators including interpretation, representation, calculation, and analysis through coordination system in human issue. Their answers were analyzed by a QL rubric according to Association of American Colleges and University (AACU) assessment. QL achievement for each indicator was categorized into four levels. The analysis result showed that students’ interpretation, representation, calculation, and analysis were at level 3, 2, 3, and 1, respectively. Based on data analysis, students’ achievement in calculation, interpretation, and representation were categorized as the milestone (mediocre). Meanwhile, their analysis skill was classified as a benchmark or the lowest QL level.