bluuebunny/crossref_metadata_2025 huggingface dataset:
The Impact of Independency in Lesson Study Based Mathematic Learning in Junior High School
Authors: Sutama Sutama , Narimo Sabar , Sari Diana Purwita
Published: March 2018

This correlational quantitative research aims to testify students’ independency in lesson study based mathematic learning based on the parent’s economical status, environment, and learning facilities. Research population was 256 seventh grade students of State Junior High School 1 Salatiga Academic Year 2016/2017. 165 research sample students were determined by using Slovin formula (alpha 5%). Proportional random sampling technique was used by using a lottery. Documentation and questionnaire were used to collect the data and analyzed by using multiple linear regression. Research results are: students’ independency supported by parent’s economical status, environment, and learning facilities is 87.70% (significance 0.000); 20.01% (significance 0.008) parent’s economical status; 28,13% (significance 0.000) environment; and 39.56% (significance 0.000) facility supports students’ independency. Thus, good parent’s economical status, environment, and learning facilities increase students’ independency in lesson study based mathematic learning.
Profile of Students Communication Skills on Global Warming and Pollution Subject Using Conference Assessment
Authors: Gustiani T. , Ratna W. Ana , Solihat R.
Published: March 2018

This research purpose is to analyze the student’s communication skills using the conference assessment and student response of conference assessment implementation on global warming and pollution subject. The method used is descriptive. Participants included 34 students 11th grade in senior high school. Conference assessment applied through project based learning on global warming and pollution subject. Conference assessment consists of written conference using online access and oral conference in face-to-face classrooms. The conference was held in three sessions (project planning, project work, and project reflection). Students communication skills consist of five indicators based on 21st skills. The indicator was 1) articulate thoughts and ideas effectively; 2) listen effectively; 3) use communication for a range of purposes; 4) utilize multiple media and technologies; and 5) communicate effectively in diverse environments. The average score of communication skill skills categorized into three groups: high, medium and low. The data showed that three indicators in high categorized (83.09% in the second indicator during oral conference,  77.94% in the fourth indicator and 88.97% in the fifth indicator). And three indicators in medium categorized (64,71% in the first indicator, 56.62% in second indicator during written conference and 69.85% in the third indicator). Students showed a positive response to the implementation and results of conference assessment.
Brain based learning with contextual approach to mathematics achievement
Authors: Kartikaningtyas V , Kusmayadi T A , Riyadi Riyadi
Published: March 2018

The aim of this study was to know the effect of Brain Based Learning (BBL) with a contextual approach to mathematics achievement. BBL-contextual is the learning model that designed to develop and optimize the brain ability for getting a new concept and solving the real life problem. This study method was a quasi-experiment. The population was the junior high school students. The sample chosen by using stratified cluster random sampling. The sample was 109 students. The data collected through a mathematics achievement test that was given after the treatment. The data analyzed by using one way ANOVA. The results of the study showed that BBL-contextual is better than direct learning on mathematics achievement. It means BBL-contextual could be an effective and innovative model.
Surface Planarization with Gas Cluster Ion Beams and Application to Wide-Bandgap Semiconductors
Authors: Toyoda Noriaki ,   Graduate School of Engineering, University of Hyogo 2167 Shosha, Himeji, Hyogo 671-2280, Japan
Published: March 2018

In this study, the fundamental sputtering effects of gas cluster ion beams (GCIBs), especially for surface planarization, are reported. Because gas cluster ions are aggregates of thousands of gas atoms, the collision process for a GCIB, with dense and multiple collisions, differs from that of atomic ions via collision cascading; thus, GCIBs have many unique irradiation effects. Among them, the low-damage and surface smoothing effects are beneficial for the planarization of wide-bandgap semiconductor wafers. The planarization of SiC, diamond, and GaN has been demonstrated using GCIB irradiation.
Patterned Sapphire Substrates for III-Nitride Epitaxial Growth
Authors: Omiya Natsuko , Aida Hideo , Kimura Yutaka , Kawamata Yuki , Kim Seong-Woo , Uneda Michio ,   Namiki Precision Jewel Co. Ltd. 3-8-22 Shinden, Adachi-ku, Tokyo 123-8511, Japan,   Kanazawa Institute of Technology, Nonoichi, Japan
Published: March 2018

GaN-based light emitting diodes (LEDs) were epitaxially grown on patterned sapphire substrates (PSSs) to investigate the effectiveness of PSSs for improving the internal quantum efficiency (IQE) and light extraction efficiency (LEE) of the LEDs. Using X-ray diffraction (XRD) and light output measurements, it was observed that the PSSs improved the crystal quality of the LED films and enhanced the LED light intensity. Based on these experimental results, we discuss whether the enhanced light intensity can be attributed to improvements in the IQE or the LEE. The contribution of the IQE improvement to the light intensity was estimated through a comparison of the calculated light emitting area of the LED chip and the measured light output. As a result, it was revealed that the IQE improvement is not the main cause of the increase in the light intensity, indicating that the PSSs mainly improve the LEE. A comparison of the calculated number of bumps on the PSSs and the measured light output of the LEDs suggests that an increase in the number of bumps could affect the improvement in the LEE.
New Method Based on Improved Double Ball Bar for Measuring Geometric Motion Errors of Coordinate Measuring Machine
Authors: Yang Ping ,   Department of Mechanical and Electrical Engineering, School of Aerospace Engineering, Xiamen University No.422, Siming South Road, Xiamen, Fujian 361005, China, Wu Yue , Yu Hui , Guo Yinbiao
Published: March 2018

In this paper, an optimized method of measuring the geometric motion errors of a coordinate measuring machine (CMM) is proposed. The method is based on an improved double ball bar (DBB) that acquires the motion and link errors of the CMM and its actual rotation angles through simultaneous circular tests. The improved DBB has embedded a ring encoder system to the bottom of a commercial DBB on an auxiliary platform. In addition, an improved motion and link error separation algorithm is established by considering the difference angle Δθ between the actual rotation angle and the theoretical rotation angle of the DBB. Both influential factors of the center offset of the DBB and Δθ are discussed through simulations. When geometric motion errors are compensated for and measured on a 400 mm × 400 mm × 150 mm CMM, the standard deviations of the roundness errors decrease to 1.9 μm and 1.5 μm on the XY and ZX planes, respectively.
Control Strategy of Screw Motion During Plasticizing Phase for All-Electric Injection Molding Machine
Authors: Yu Shengrui , Zeng Lanyu ,   School of Mechanical and Electronic Engineering, Jingdezhen Ceramic Institute Jingdezhen 333403, China,   Office of Academic Affairs, Jingdezhen Ceramic Institute, Jingdezhen, China
Published: March 2018

This work studies a control strategy of screw motion to improve the plasticizing precision for an all-electric injection molding machine (AIMM) based on a biaxial simultaneous motion system. In the standard plasticizing process, a screw retraction before or after the metering phase is proposed to link up with the traditional metering process for reducing the residual pressure at the end of holding and metering, respectively. The modified incomplete plasticizing process is then applied to prevent the potential over-travel of the screw. The incomplete plasticizing process uses a control strategy to obtain a fixed start point for the screw at injection in each cycle. Experimental results showed that both the standard and incomplete plasticizing process improve the visual quality and molded precision of parts.
Wheel Working Surface Topography and Grinding Force Distributions in Creep Feed Grinding
Authors: Fujimoto Masakazu , Ohishi Susumu , Hinaga Ryosuke , Kubo Yuki ,   Department of Mechanical Engineering, Aoyama Gakuin University 5-10-1 Fuchinobe, Chuo-ku, Sagamihara-shi, Kanagawa 252-5258, Japan,   NEC Solution Innovators, Ltd., Tokyo, Japan,   Kubo Kenzaiseisakusyo Corp., Tokyo, Japan
Published: March 2018

This paper discusses the topographic features of wheel working surfaces and the grinding force distributions in wheel-work contact zones of creep feed grinding. Grain cutting edge wear is observed by a Scanning Electron Microscope (SEM) and quantitatively evaluated in terms of attritious wear flat percentage, which is able to characterize the wear behavior. By measuring the normal and tangential grinding force distribution in the grinding zone, the distribution form of grinding forces can be approximated to be triangular and the grinding forces increased rapidly due to workpiece burn. It is shown that the variation of the grinding force and the distribution are closely related to cutting edge wear characteristics.
Geometric Error Compensation of Five-Axis Machining Centers Based on On-Machine Workpiece Measurement
Authors: Sato Ryuta ,   Department of Mechanical Engineering, Kobe University 1-1 Rokko-dai, Nada, Kobe 657-8501, Japan, Shirase Keiichi
Published: March 2018

This study proposes an identification and compensation method for the geometric errors of the rotary axes in five-axis machining centers, based on the on-machine measurement results of the machined workpiece. Geometric errors can be identified from the shape geometry of the workpiece machined by five-axis motions because the influence of the errors appears on the shape geometry. An observation equation can be obtained based on the geometric error model and machined shape. The actual geometric errors can be identified by the least square matching of the measured and simulated machined shapes. In order to confirm the effectiveness of the proposed method, an actual cutting test and a simulation are performed. Based on their results, it is confirmed that the proposed method can successfully identify the geometric errors in the simulation. However, these errors cannot be identified in the experiments because a few of them do not have sufficient influences onto the machined shape. On the other hand, although the geometric errors cannot be correctly identified, it is confirmed that the they can be adequately compensated for based on the identified errors in both the simulation and experiment.
Aiding of Micro End-Milling Condition Decision Using Data-Mining from Tool Catalog Data
Authors: Kodama Hiroyuki , Okuda Koichi , Tanaka Kazuhiro ,   Okayama University 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan,   University of Hyogo, Hyogo, Japan
Published: March 2018

When the minor diameter of an end-mill is 1.0 mm or less, handling of tools becomes difficult because of the influence of the characteristic size effect and bending of the cutting edge. Furthermore, it is hard for engineers to derive the cutting conditions that can serve as indexes in the early stage of micro end-milling. In this study, a system that can make instantaneous decisions was developed, on the basis of workpiece material-characteristics and tool shape parameters, by applying data mining techniques together with non-hierarchical and hierarchical clustering methods on micro end-mill catalog data. Slotting experiments using cemented carbide square micro end-mill were carried out to investigate the practicability of derived mining conditions under slotting of A7075 (JIS). We found that catalog mining can be used to derive the guidelines for deciding the micro end-milling conditions.
Carcass Quality, Non-Carcass Component and Meat Cholesterol of Kacang Goat Fed with Fermented Cocoa Shell
Authors: Suryanto Edi , Bulkaini Bulkaini , Soeparno Soeparno , Mastur Mastur
Published: March 2018

The experiment was conducted to investigate carcass quality, non-carcass component and meat cholesterol content of Kacang goat fed with fermented cocoa shell (FCS). Materials used in the experiment consisted of 9 male Kacang goat (6 - 9 months of age and ± 18,67 kg of body weight), corn straw, rice bran and FCS using three types of starters. The goat was divided into 3 groups of FCS fermentation of cocoa shell were carried out using 3 types of starters, i.e. cocoa shell fermentation 1) without additional starter (WAS FCS), 2) with Bioplus (Bioplus FCS, 3) with burger feed sauce (BFS FCS). All goats were fed corn straw and rice bran amounting to 70% and FCS amounting to 30% for 2 months. They were then slaughtered at Majeluk Slaughterhouse, Lombok. The data of carcass quality, non-carcass component, cholesterol content, and marbling were collected. The results showed that the carcass quality and non carcass component of Kacang goat were not significantly different among the feed treatments. However, the cholesterol content of meat was significantly different among the feed treatments (P<0.05). The average of carcass percentage, backfat thickness, rib eye area, fleshing index, cholesterol content and marbling of Kacang goat fed WAS FCS were 47.69%, 1.68 mm, 29.01cm2, 0.85%, 30.13 mg/100g, and 0.16%; fed Bioplus FCS were 48.67%, 1.80 mm, 30.79 cm2, 0.91%, 34.96 mg/100g and 0.05%; fed BFS FCS were 48.02%, 1.74 mm, 29.90 cm2, 0.77%, 31.88 mg/100g, and 0.11%, respectively. Non-carcass component of Kacang goat was not significantly different among the feed treatments, it was 42.41±0.064% in average. Cholesterol content of meat of Kacang goat differed among the feed treatments (P<0.05). Kacang goat fed WAS FCS had the lowest cholesterol content (30.13 mg/100 g). It could be concluded that Kacang goat fed ration containing fermented cocoa shell with several starters produced similar carcass quality and non carcass component. However, FCS without additional starter resulted in lower cholesterol content of meat.
Utilization of Jack Bean (Canavalia ensiformis) Meal as a Substitute for Soybean Meal in Diet for Broiler Reared for 35 Days
Authors: Sudarman Asep , Jayanti Anggun Marsiz , Mutia Rita
Published: March 2018

This study was aimed to evaluate the utilization of jack bean meal as a substitution of soybean meal in the diets and the effect on broiler performance. A total number of two hundred Lohmann MB 202 Platinum broiler chickens were kept in five weeks rearing period, consisted of three weeks of starter phase (0-3 weeks) and two weeks of finisher phase (3-5 weeks). This study used a completely randomized design with four treatments and five replicates. The dietary treatments were: JB0-0 (control ration: basal diet without jack bean meal substitution in starter and in finisher phase), JB50-0 (basal diet with jack bean meal substitution in starter phase only), JB50-50 (basal diet with jack  bean meal substitution in starter and in finisher phase), JB0-50 (basal diet with jack  bean meal substitution in the finisher phase only). The data obtained were statistically analyzed using analysis of variance and followed with Duncan's multiple-range test for the data with significant difference. The variables measured were: growth performance, carcase yield, visceral organ weight and immune organ. Results showed that the dietary treatment had no effect on performance, carcass yield and commercial cut, visceral organ or immune organs of 35 days old broiler chickens, except for the thymus (P<0.05). It can be concluded that as a source of protein, soybean meal can be replaced by jack bean meal up to 50%.  Jack bean meal can be given either in starter phase only, in finisher phase only, or in both starter and in finisher phase.
The Type of Honeybees Forages in District of Pakem Sleman and Nglipar Gunungkidul Yogyakarta
Authors: Agussalim Agussalim , Agus Ali , Umami Nafiatul , Budisatria I Gede Suparta
Published: March 2018

This research aimed to investigate the type of plants for honeybees forages in Pakem Sleman and Nglipar Gunungkidul. This research was conducted from 16 March to 12 May 2016. The method used was direct observation in the plantations, fields, and forests. The type of plants observed were dominant plants, so can be developed beekeeping, honey. To determine the type of plants that produce nectar and pollen, one or two samples of flower in each plant were taken, then the availability of nectar and pollen was checked. The data of honeybees forage types were analyzed descriptively. The results showed that the type of honeybees forages in Pakem Sleman consisted of coconut, coffee, banana, calliandra, avocado, rice, albizia, chili, tomato, long beans, mustard green, maize, cucumber, melinjo, mahogany, cassava, and cherry. Honeybees forages in Nglipar Gunungkidul consisted of coconut, albizia, acacia, banana, peanuts, tamarind, eucalyptus, rambutan, sorghum, cacao, soybeans, cassava, maize, rice, rose wood, mahogany, and cherry. Thus, Pakem Sleman and Nglipar Gunungkidul have great potential for development of beekeeping honey.
Modeling How the Leader Power Affecting Performances of the Smallholder Beef Farming
Authors: Setianto Novie Andri , Hidayat Nunung Noor , Yuwono Pambudi
Published: March 2018

This study aimed to explore how the leader power is affecting the performance of beef farmer group. The research was undertaken in two farmers group in Kabupaten Banjarnegara, Central Java Province involving 35 farmers and two beef traders. Systems thinking the approach was chosen about its capability to capture the complexity of the beef farming systems. A combination of semi-structured interviews, in-depth interviews, and workshop have been conducted to finalize this study. The discussion were focused on three aspects; (1) daily activities; (2) resources used and affected by those activities; and (3) pressures that are directly affected the resources and activities. The result was presented in a Causal Loop Diagram (CLD) which generated using Vensim® software. The CLD showed that leader power affects the group performance in two reinforcing loops. Firstly, leader power positively linked to the decision for allocating profit to group reinvestment. Secondly, for allocating proportion for breeding. Farmer’s actual income become the leverage of the power dimension. Income will enforce the power thus makes the loop virtuous, whereas a loss will reduce power and makes the power loop vicious.
Manajemen Rantai Pasok Komoditas Ternak dan Daging Sapi
Authors: Saptana NFN , Ilham Nyak
Published: March 2018

Beef products demand keeps increasing and its domestic supply is insufficient. Domestic beef production to meet domestic demand is one of priorities in the 2015-2019 Strategic Plan of the Ministry of Agriculture. This study aims to examine feasibility of cattle business, channel supply chain, and supply chain management performance of cattle and beef commodities. The method of analysis using approaches of feasibility cattle business, supply chain channels of cattle and beef commodities, and cattle supply chain management at farmers’ level. Analysis results show that small-scale cattle fattening business on cash costs was still profitable, but its profit was lower or incurring loss if based on the total costs. Medium and large business scales were profitable and depending on the race types of cattle business. Supply channels were diverse and quite long controlled by middlemen, slaughters, and inter-regional traders/distributors. Supply chain management performance of cattle commodity was relatively well structured with low to moderate market integration. To improve the supply chain management performance, it is necessary to implement a horizontally-integrated business. In addition, it is urgent to involve small and medium-large business involvement, as well as partial vertical integration.

 

Abstrak

Produk daging sapi permintaannya terus meningkat dan belum mampu dipenuhi dari produksi domestik. Pemerintah memutuskan bahwa pemenuhan kebutuhan daging sapi menjadi salah satu prioritas utama yang tercantum dalam Renstra Kementerian Pertanian 2015-2019. Penelitian ini bertujuan untuk mengkaji kelayakan usaha ternak sapi pada berbagai skala usaha, saluran rantai pasok, dan kinerja manajemen rantai pasok komoditas ternak sapi dan daging sapi. Metode analisis menggunakan analisis kelayakan usaha ternak sapi, saluran rantai pasok komoditas ternak dan daging sapi, serta manajemen rantai pasok ternak sapi di tingkat peternak. Hasil kajian menunjukkan bahwa usaha penggemukan sapi skala kecil atas biaya tunai masih menguntungkan, namun jika berdasarkan atas biaya total keuntungannya menjadi turun bahkan merugi. Pada usaha skala menengah dan besar memberikan keuntungan yang bervariasi dari moderat hingga tinggi tergantung pada ras sapi yang diusahakan. Saluran rantai pasok sangat beragam dan cukup panjang dengan peran utama pedagang pengumpul antar desa/kecamatan dan pedagang pemotong/pejagal, dan pedagang antar daerah/distributor. Kinerja manajemen rantai pasok komoditas ternak sapi menunjukkan bahwa  tipe struktur pengelolaan rantai pasok ternak dan daging sapi tergolong kategori “keterkaitan pasar” dengan tingkat kinerja pada level rendah hingga moderat. Implikasi kebijakan untuk meningkatkan kinerja manajemen rantai pasok dapat dilakukan melalui usaha yang terintegrasi secara horizontal, meningkatkan kinerja penerapan manajemen rantai pasok dengan melibatkan usaha skala kecil dan menengah/besar, dan meningkatkan integrasi vertikal secara parsial ke arah lebih holistik. 
The Effect of Base Catalyst in the Citronellal Purification of Kaffir Lime Oil Precipitated by NaHSO3 and Na2SO3
Authors: Hafidloh Dewi , Warsito NFN , Utomo Edi Priyo
Published: March 2018

Citronellal is the main component in kaffir lime oil that has great potential utilization in industrial and pharmaceutical field. Citronellal purification using conventional method, such as destillation, requires lots of solven, special equipment and lots of time. Alternatively, purification method using base catalyst NaHSO3 and Na2SO3 as reagent  could be more simple. This research aimed to evaluate the effect of the base catalyst used for hydrolysis in the purification process of citronella using salt reaction with NaHSO3 and Na2SO3 reagents. The experiments was conducted in the Laboratory of Organic Chemistry, Brawijaya University, Malang, from August 2015 to February 2016. The research was arranged a randomized block design with factorial treatments. The first treatments was two types of reagents, NaHSO3 and Na2SO3. The second one was the variations of base catalyst used for hydrolyzing NaHCO3, Na2CO3 and NaOH. The purity of hydrolyzed citronellal was measured by gas chromatography-mass spectrometry. The highest purity of citronella 89,29 % was obtained with the used of Na2SO3 reagent at the mole  ratio 1:2, hydrolyzed by Na2CO3 (pH 10.98). Thus the method, can be recommended in purifying citronellal from kaffir lime oil.
Fumigant and Repellent Effects of Essential Oil Fractions of Mentha piperita against Tribolium castaneum (Coleoptera: Tenebrionidae)
Authors: Syam Sunaryo , Harahap Idham Sakti , Dadang NFN
Published: March 2018

Tribolium castaneum is one of the important stored-product pests in tropical countries. Fumigation with phosphine is the most commonly method to control T. castaneum. However, long-term application of phosphine will cause resistance. The aims of this research were to study the effects of fumigant and repellent of peppermint oil Mentha piperita fraction against T. castaneum, and to identify the compounds contained in the active fraction. This research was conducted in Entomology Laboratory Seameo Biotrop and Forensic Laboratory of Indonesian Police Headquarters Jakarta, from January to October 2016. Peppermint oil was extracted by distillation from the leaves of M. piperita. Peppermint oil was fractionated by counter-current distribution method using three solvents: n-hexane, ethyl acetate, and methanol. Then, the three fractions were tested as fumigant and repellent against T. castaneum. The active fraction of essential oils were identified by GC-MS. The n-hexane fraction of peppermint (HFP) was the active fraction caused mortality on larvae and adults of  T. castaneum at 72 hours after fumigation. The LC95 values for the adults and  larvae was 1.9 % and 9.43 % , respectively. Sublethal concentration of HFP showed inhibitory activity on larvae development. Percentage of pupae transformed from treated larvae was 48.67-74.91 % and percentage of adults emerged was 9.12-16.59 %. The repellent activity of HFP on adults of T. castaneum was 86.7 % at 72 hours after treatment. The dominant compounds of HFP was β-pinene, limonene, isopulegol, menthone, isomenthon, menthol, pulegone, and trans-carane. The HFP or its compounds was potential to be develoved as botanical insecticides.
Persistence of Botanical Insecticide Residue of Pyrethrum and Neem in Rice Plant
Authors: Kardinan Agus , Wahyono Tri Eko , Tarigan Nurbetti
Published: March 2018

Brown planthopper is still a major problem in rice. Control using botanical insecticides is considered less effective, since its persistence in rice plantation is short. Research on the persistence of botanical insecticide residues of pyrethrum and neem in rice has been conducted in green house of Entomology, Indonesian Spices and Medicinal Crops Research Institute, Bogor from January to December 2016. The research was aimed to determine the persistence of botanical insecticide residue on rice by testing it to brown planthopper mortality. The study was arranged in complete randomized design with six treatments and four replications. The treatment consisted of two pyrethrum formulas (EC); two neem formulas (EC); positive controls of synthetic insecticides (a.i. carbosulfan) and negative control (water). The method used was Leaf Residue Method, by spraying the formula into one month-old rice plants, then 10 brown planthopper nymphs of forth instar were introduced into each plant in the first, second, third and fourth day after spraying.  The planthopper mortality was observed in the first, third, sixth, 24th and 48th hours after introduction. The residuals of all insecticides tested were still affecting the  mortality of brown planthopper until the fourth day after spraying, although the effectiveness decreased by the time. The average mortality on the first day introduction after spraying ranged between 53-73 % and in the fourth day after spraying was 18-25 %.
Perilaku Harga dan Integrasi Pasar Bawang Merah di Indonesia
Authors: Kustiari Reni
Published: March 2018

English
Shallot is the main spice widely used in the Indonesian food cooking and servings that makes its demand continues increasing although its price highly fluctuates. This study is intended to analyze price behavior and shallot market integration in Indonesia. This study uses monthly producer and consumer prices data for 2011-2016. The price fluctuation was analyzed with the coefficient of variation. The market integration was analyzed with Johansen's cointegration approach using the Vector Error Correction Model (VECM). The study shows that both producer and consumer prices fluctuations increase after the introduction of Horticultural Product Import Recommendation policy. The Engle-Granger causality test shows that there is no causal relationship between the consumer and producer price of the shallot in Indonesia. The market power and market failure are attributed to the absence of causality. The results of forecast errors variance decomposition analysis indicate that the market in Central Java is the dominant market and can be used as a reference market in predicting the dynamics of consumers’ shallot price in Indonesia. Managing shallot production level and amount of shallot supplies in the Central Java markets is the keys for ensuring shallot price stability at national level.

Indonesian
Bawang merah merupakan bumbu masak yang utama bagi masyarakat Indonesia sehingga permintaan bawang merah meningkat terus, walaupun harganya berfluktuasi. Studi ini bertujuan untuk menganalisis perilaku harga dan integrasi pasar bawang merah di Indonesia. Studi ini menggunakan data harga produsen dan harga konsumen bulanan tahun 2011–2016. Fluktuasi harga dianalisis dengan koefisien variasi. Integrasi pasar bawang merah dianalisis dengan pendekatan kointegrasi Johansen menggunakan Vector Error Correction Model (VECM). Penelitian menunjukkan bahwa fluktuasi harga produsen dan harga konsumen meningkat sesudah kebijakan Rekomendasi Impor Produk Hortikultura diberlakukan. Uji kausalitas Engle-Granger menunjukkan bahwa antara harga konsumen dan harga produsen bawang merah di Indonesia tidak terdapat hubungan kausalitas. Hal ini dapat disebabkan oleh adanya market power dan terjadinya kegagalan pasar. Analisis dekomposisi varian kesalahan menunjukkan bahwa pasar Jawa Tengah adalah pasar dominan dan dapat menjadi acuan memprakirakan dinamika harga konsumen bawang merah di Indonesia. Pengelolaan tingkat produksi dan jumlah pasokan bawang merah di pasar Jawa Tengah termasuk sebagai kunci dalam menjaga stabilitas harga bawang merah secara nasional.
A Comparison of Nursing Maths Support Approaches
Authors: Little John
Published: March 2018

This article compares interventions for improvement of students’ numeracy and drug calculations skills respectively; numeracy test / re-test with maths support versus a numeracy workshop and a calculations drop-in.  In the first intervention supported students increased their mean score from 19 out of 40 to 30 out of 40 and their peers increased from 27 out of 40 to 30 out of 40, both statistically significant increases.   In the second intervention the highest scoring group of students made use of both the workshop and the drop-in.  Whilst there was no statistically significant difference in mean scores across the four identified groups of students there were no low scoring outliers amongst the students who made use of the support offered.  Although there is stronger evidence for the first intervention having impact, the second intervention is more aligned to drug calculations skills development.  However, the latter would need a larger scale sample to confirm efficacy.
Editorial
Authors: Bradshaw Noel-Ann
Published: March 2018

Editorial
Appendix: Overview of Stats Tests
Authors: Mitchell Peter
Published: March 2018

Handout  to accompany Teaching statistical appreciation in quantitative methods
Controversias sobre la necesidad del crecimiento económico para garantizar el bienestar social
Authors: Artur Raus Daniel
Published: March 2018

En el actual debate acerca de si necesitamos el crecimiento para garantizar el bienestar social participa un considerable número de científicos de renombre sin haber llegado, hasta la fecha, a un denominador común. Tras ofrecer una posible definición de los términos bienestar y economía ecológica, este trabajo se centra en las controversias actuales de la temática, ofreciendo un resumen acerca de algunas de las posturas más discutidas y sus argumentaciones. En el transcurso de este estudio se revisa, entre otros, la influencia que ejercen medidas para la mitigación del cambio climático en el crecimiento económico abarcando, además, la función del consumo en relación al bienestar, y se describen algunas soluciones propuestas por distintos científicos que sugieren la necesidad de un cambio de los paradigmas económicos abordando factores ecológicos con el fin de determinar el bienestar social. Finalmente se ofrece una posible respuesta a la pregunta central, si el crecimiento económico es condición necesaria para garantizar el bienestar.
Análisis espacial de los inmuebles dañados por el sismo 19S-2017 en la Ciudad de México
Authors: Garrocho Carlos , Campos-Alanís Juan , Chávez-Soto Tania
Published: March 2018

Los sentidos humanos tienen una importante capacidad para detectar patrones  espaciales, pero sus limitaciones son enormes, como lo han demostrado la psicología cognitiva y la Gestalt desde hace mucho tiempo. Por tanto, se requieren instrumentos más precisos y confiables para identificar patrones y actuar en consecuencia. El análisis espacial ofrece diversas alternativas para identificar patrones territoriales estimando su significancia estadística, con lo que se minimiza la posibilidad de percibir patrones ilusorios. Este trabajo utiliza desarrollos de punta en materia conceptual, metodológica yde tecnología para: a) Identificar con estadística espacial los clusters de inmuebles dañados por el sismo del 19S-2017 en la CDMX. La estrategia se basa en una secuencia de zooms a diversas escalas geográficas: desde la escala global para toda la CDMX, pasando por las escalas de delegación, colonia y manzanas, hasta llegar a la escala mínima de inmueble; b) localizar Unidades Móviles de Emergencia mediante modelos delocalización-asignación, y c) comparar los patrones espaciales de inmuebles colapsados y dañados por los grandes sismos de 1985 y 2017. Los resultados de este trabajo podrán orientar los esfuerzos de reconstrucción, atención e investigación hacia zonas prioritarias espacial y estadísticamente significativas.
Terremoto en México: la respuesta en salud del gobierno de la Ciudad de México
Authors: Ahued-Ortega Armando
Published: March 2018

Ante el evento telúrico del 19 de septiembre de 2017, la Secretaría de Salud de la Ciudad de México (Sedesa) y las instituciones sectorizadas a ella instrumentaron intervenciones en lo inmediato: cada unidad en la red hospitalaria de la Sedesa se preparó para la recepción masiva de pacientes. Se suspendieron las cirugías programadas, se trasladó a los pacientes de urgencias a hospitalización o terapia intensiva y se egresó a aquéllos que pudieran continuar en sus casas, para recibir pacientes con prioridad roja y amarilla. Con la declaratoria de emergencia publicada por el jefe de gobierno la Sedesa, en coordinación con otras dependencias del gobierno de la CDMX, instituciones federales, paraestatales, organizaciones de la sociedad civil e instituciones privadas se instrumentaron los planes, protocolos y acciones definidos exprofeso.
Nuestros terremotos
Authors: Viveros-Wacher Paula , Kraus-Weisman Arnoldo
Published: March 2018

El terremoto de septiembre de 2017 sirvió para mostrar el rostro de la sociedad y la cara del Estado. El terremoto dividió en dos a México; uno de ellos, el de la ciudadanía, mostró su solidaridad; el del poder, rezagado e inoperante, quedó relegado ante la fuerza y entrega de la gente. La estructura social permite a las personas crear redes y difundir informa­ción que puede ser útil para manejar y confrontar desastres. Las bondades del capital social son vastas. Las experiencias previas y la nuestra enaltecen el papel de la comunidad y la trascendencia de la solidaridad, la empatía y del compromiso de quienes la ejercen.
Impacto de los sismos de septiembre de 2017 en la salud mental de la población y acciones recomendadas
Authors: Álvarez-Icaza Dení , Medina-Mora María Elena
Published: March 2018

Los desastres naturales son un factor de riesgo para el desarrollo de trastornos mentales, por lo que la atención a la salud mental de los afectados es prioritaria. Este texto tiene por objetivo describir la prestación de servicios de salud mental a los afectados por los sismos de septiembre de 2017 y las necesidades de la población. A partir de estas observaciones se concluye que es esencial que el país cuente con un Programa Nacional de Atención a la Salud Mental en Situaciones Críticas y Desastres, cuyas líneas de acción básica se describen en este artículo.
Terremotos, salud y sociedad: lecciones aprendidas
Authors: Lazcano-Ponce Eduardo , Oropeza-Abúndez Carlos
Published: March 2018

La revista Salud Pública de México, atenta a los fenómenos que inciden en la salud de la población, presenta un número monográfico titulado Terremotos, salud y sociedad: lecciones aprendidas. Esta iniciativa reúne, con pertinencia y oportunidad, la respuesta expedita de diversos grupos de investigación intersectorial en el ámbito nacional e internacional, para documentar la experiencia y describir las lecciones aprendidas, desde la perspectiva multidisciplinaria e intersectorial, de los terremotos ocurridos en México en septiembre de 2017.
Safe Drilling in Chemically Active and Naturally Fractured Source Rocks: Analytical Solution and Case Study
Authors: Liu Chao , Han Yanhui , Abousleiman Younane
Published: March 2018

The recently formulated theory of dual-porosity dual-permeability porochemoelectroelasticity is applied to derive the analytical solutions for an inclined wellbore drilled through a shale formation, accounting for the effects of natural fractures and shale chemical activity (Liu et al. 2018). With the fully coupling of water, anions, cations flow, stresses, and pore pressure in between shale matrix and fractures, the newly-derived solutions are able to evaluate the relevant stresses and pore pressure around the wellbore.

The analytical solution is applied to study two field cases. The Hoek-Brown failure criterion is employed to evaluate wellbore collapse and mud densities. The two case studies indicate that the analytical solution explains the wellbore failure and is capable of predicting the used safe drilling mudweight. Back analysis on the field data with a sensitivity study is able to estimate the range of the fracture permeability once the matrix permeability is defined.
Strategic capacities in US universities – the role of business schools as institutional builders
Authors: Carton Guillaume , McMillan Charles , Overall Jeffrey
Published: March 2018

The global expansion of the higher education and professional faculties like business schools offers a case study in the strategic capabilities of universities and professional schools like business to build academic strength, reputation, and legitimacy. The expansion of business schools reflects novel strategies like ecosystems collaboration and network advantages, presenting new challenges for quality, relevance, and competitive threats from the consulting industry, corporate universities, MOOCs, and highly-specialized business schools. The paper concludes with recommendations for business education.
Online Marketing Enterprise of Jombang Culinary from TAM and VEM Perspective on Social Media
Authors: Purwanto Nuri , Juwita Kristin
Published: March 2018

The purpose of this research was to develop, evaluate, and test antecedent model with trust as an intermediary variable of Technology Acceptances Model (TAM) and Virtual Experiential Marketing (VEM) for buying intention. It used purposive sampling technique with 300 respondents. The questionnaire results were evaluated and analyzed using Structural Equation Model (SEM) method with the analysis tools (the third version of SmartPLS). The research result shows that there is no effect between TAM and trust. In addition, there is a direct and positive influence of VEM on trust. The trust and TAM have a positive effect on buying intention. However, VEM does not affect buying intention. The results indicate that the trust cannot mediate TAM and buying intention. Meanwhile, trust can mediate between VEM and buying intention.
The Effect of Corporate Governance and Firm Performance on Stock Price: An Empirical Study on Indonesia Stock Exchange
Authors: Mulyono Mulyono , Suprapto Adi Teguh , Prihandoko Danang
Published: March 2018

This research aimed to determine the effect of corporate governance and firm performance on stock prices. It was shown by Corporate Governance Perception Index (CGPI), Return on Assets (ROA), Total Asset Turnover (TATO), and firm size (SIZE) in the Indonesia Stock Exchange (IDX). Data sample used in this research was company listed on IDX during 2009-2012 and participated in CGPI of that period. Financial statement data and stock prices could be obtained from the IDX website and CGPI data were from the Indonesian Institute for Corporate Governance. Hypothesis test used in this research was a multiple linear regression analysis. As a result, the application of corporate governance and ROA give positive but insignificant effect on stock prices. Meanwhile, TATO and SIZE have a positive and significant effect on stock prices. Both variables of corporate governance and firm performance influence stock prices significantly.
Rasch Model for Validation a User Acceptance Instrument for Evaluating E-learning System
Authors: Rachman Taufiq , Napitupulu Darmawan Baginda
Published: March 2018

Advances in science and technology, especially Information and Communication Technology (ICT), has great impacts on the present education management.It allows the development of the e-learning system to facilitate the teaching and learning processes. As a result, many modern universities have developed and utilized the system. For that reason, there is a great need to develop an instrument in which the elearning management system can be evaluated from various aspects such as the system performance, user acceptance, and utilization. The level of the user acceptance is the central focus of this study, known to be strongly related to the level of utilization, and is widely studied by using the famous framework of Davis’ Technology Acceptance Model (TAM). The framework is also adopted in the current study and the required data to analyze quantitatively the model are selectively obtained from a sample of 73 respondents. The validity and reliability of the data are evaluated by using the Rasch model. The results suggest that the all 16 items in the questionnaire are valid and reliable to measure the acceptance of thee-learning system.
Feature Image Watermarking Based on Bicubic Interpolation of Wavelet Coefficients Using CRT
Authors: Adi Prajanto Wahyu , Astuti Yani Parti , Subhiyakto Egia Rosi
Published: March 2018

The main objective of watermarking method is to improve the robustness and imperceptibility. This paper introduces an improved CRT watermarking method using absolute value of interpolated wavelet coefficients aiming to improve the imperceptibility and robustness. The standard CRT method embeds the watermark bits on the blocks of pixels evenly. Hence, it can significantly reduce the quality of watermarked images when the watermark lies on the homogeneous area. Otherwise, the proposed method is embedding the watermark bits on the heterogeneous area by sorting the absolute magnitude of wavelet coefficients descending. The waveletcoefficients are selected from high frequency wavelet sub band HH. This scheme is able to determine the appropriate embedding location in certain range of value. The watermark bits are then embedding on the selectedpixel value using CRT scheme. The result shows that the average imperceptibility value the CRT is 0.9980 while the proposed method has average value of 0.9993. On robustness against compression, the proposed method achieves better result compared to the CRT with the average NC values of 0.7916 higher than the CRT value of 0.7530. These prove that the proposed method has better performance in term of imperceptibility and robustness against compression than the CRT method.
Design of Distribution Optimization Application using Firefly Algorithm
Authors: Manik Ngarap Imanuel , Nursalim Yunggih , Suhartono Derwin
Published: March 2018

The goal of this research was to optimize the distribution of goods and computerize. The method consisted of problem identification, analysis, implementation, and evaluation. Firefly algorithm was used as a method for optimizing the distribution of goods. The results achieved are the shortest distribution route of goods in accordance with the existing constraints and low cost of distribution. It can be concluded that the research can beused too ptimizethe distribution of goods and tominimize distributioncost.
Improving Reliability of Wireless Sensor Network (WSN) Using Network Coding Multipath Routing
Authors: Abdurohman Maman
Published: March 2018

This research proposed new method to improve performance of WSN. It used network coding on transmission scheme. The researcher had modified the existing network coding multipath routing for a novel node selection to own residual power node in network coding routing mechanism and to improve reliability of a WSN. This routing mechanism was placed in router for routing purpose. Then, Software network simulation method was done by using OMNET++ platform and MiXiM Framework library. The result shows that proposed method to select nodes and execute network coding succeeds on improving performance of WSN like the reliability compared to the previous method.
Cloud Computing Impelementation Using Model Roadmap for Cloud Computing Adoption (ROCCA) on IT Consultant Industry
Authors: Perdana Panji Arief , Suharjito Suharjito
Published: March 2018

The purpose of this research was to build cloud computing referring to Roadmap for Cloud Computing Adoption (ROCCA) model so that the best strategy could be implemented in PT Matrica Consulting Service. The implementation of cloud computing had five stages modifications ROCCA adoption model. Those stages were analysis, design, adoption, migration, and management. Data were taken from distributing questionnaires and conducted interviews with R&D Manager and analyzed using SWOT analysis. The result is the implementation of cloud computing models, and implementation of private cloud and Software as a Service (SaaS) needs to be modified so it can be implemented properly. The implementation canincrease the performance PT Matrica Consulting Service based on the characteristics of the cloud which is flexible and secure to be accessed as long as it is connected to the Internet and maintained properly.
Development of Mobile Learning in Faculty of Economics, Bina Nusantara University
Authors: Darmadi Herru , Liawatimena Suryadiputra
Published: March 2018

The research wanted to find the workflow and solution by developing m-learning object for Android and iOS-based smartphone and tablet that supported interactive multimedia. The research began with analysis, design, implementation, and evaluation. Currently, the learning objects were not compatible with mobile devices. To overcome this problem, the research focused on designing the instructional design for m-learning and the development of interactive multimedia. Instructional design was created by the collaboration of the subject matter expert and instructional designer. M-learning was designed using UML and developed using Adobe AIR technology. The implementation of this research was a prototype of m-learning for concept of cost in Faculty of Economics, Bina Nusantara University. Then, the evaluation was conducted by distributing m-learning object to 32 selected students by simple random sampling in their first week of lectures in February 2014. The observation was conducted during m-learning object installation and initial learning process. At the end of the second week of the experiment, summative assessment and questionnaire were given to students. The results show that m-learning object is compatible with mobile devices. The students also say that m-learning is easy to use and helpful for their learning.
Filtering and Wavelet Transform Algorithm for Old Document Image Restoration
Authors: Samosir Ridha Sefina
Published: March 2018

The aim of this research was to develop image restoration system using filtering and wavelet transform algorithm. Data collection was through observation and system was developed using prototyping model. Result of this research is a computer based on system to restore image containing noise. Based on the research process, filtering and wavelet transform algorithm can used to restore old document image from interferences (noise).