bluuebunny/crossref_metadata_2025 huggingface dataset:
SIFAT MEKANIK BAHAN KOMPOSIT KAMPAS REM BERBAHAN DASAR SERBUK ARANG KULIT BUAH MAHONI
Authors: Prabowo Herwidhi Tri , Sulhadi Sulhadi , Aji Mahardika Prasetya , Darsono Teguh
Published: October 2017

Mahogany bark is one of natural material which not used optimally in society. The overabundance of mahogany bark appearing new problem of garbage which charges an alternative solution creatively and innovatively becomes a new efficient and effective product. An alternative solution of mahogany bark utilization is as organic composite material of disk brake. The making of organic composite material of brake disk firstly is reducing the mahogany bark becomes a homogeneous carbon powder. The mahogany bark was smoked being of carbon and mixed with coconut shell and resin polyester as an adhesive. The organic composite material was produced, tested by Brinell Hardness test and attrition test by varied of composition percentage. There are five kinds of composite material composition had been tested. The result is obtainable of the most precise composition percentage 60% mahogany bark carbon, 15% coconut shell carbon, and 25% resin polyester which has brinell hardness number and attrition massa identically with Standar Nasional Indonesia (SNI).

Keywords: mahogany bark, composite material, disk brake, Brinell hardness test, attrition test
DISTRIBUSI SPASIAL DENSITAS CAKRAM BERUKURAN SAMA DALAM PEMODELAN PEMBENTUKAN ASTEROID
Authors: Viridi Sparisoma , Dermawan Budi
Published: October 2017

Several two-dimension particles in the form of a disk, which only interact through gravitational force and normal force, are simulated. Assumed that there are only two values of particle density (same diameter but different mass). Simulation are conducted until particles position are slightly constant. It is obtained that density is varied radially, decreasing with an increase of radial position, and nearly isotropic angularly in final condition. It has been simulated N = 64 particles with mass ratio mA/mB = 0.25 for 944 s simulation time.

Keywords: asteroid forming, granular material, density distribution, binary mixture
Influence of velocity slip and temperature jump conditions on the peristaltic flow of a Jeffrey fluid in contact with a Newtonian fluid
Authors: Vajravelu K. , Sreenadh S. , Saravana R.
Published: October 2017

In this paper, we investigate the peristaltic transport of a two layered fluid model consisting of a Jeffrey fluid in the core region and a Newtonian fluid in the peripheral region. The channel is bounded by permeable heat conducting walls. The analysis is carried out in the wave reference frame under the assumptions of long wave length and low Reynolds number. The analytical expressions for stream function, temperature field, pressure-rise and the frictional force per wavelength in both the regions are obtained. The effects of the physical parameters associated with the flow and heat transfer are presented graphically and analyzed. It is noticed that the pressure rise decrease with increasing slip parameter β in the pumping region (ΔP > 0). The temperature field decreases with increasing Jeffrey number and the velocity slip parameter; whereas the temperature field increases with increasing thermal slip parameter. Furthermore, the size of the trapped bolus increases with increasing Jeffrey number and decreases with increasing slip parameter. We believe that this model can help in understanding the behavior of two immiscible physiological fluids in living objects.
Can Telemedicine Be Used for Adolescent Postoperative Knee Arthroscopy Follow-up?
Authors: Abel Kathy Chilutti , Baldwin Keith , Chuo John , Ganley Theodore , Kim Albert , Wells Lawrence , Giordano Terri
Published: October 2017

Approximately 350 adolescents have arthroscopic orthopaedic knee surgery at our institution per year. This study evaluated the efficacy of a telehealth (virtual) visit in clients between the ages of 10 and 20 years following this type of procedure performed at an outpatient surgery center. The study compared in-office visits to telemedicine visits done within 24 hours of each other, and demonstrated that home telemedicine visits have similar results when range of motion, incision color, and effusion size are evaluated. Additionally, this study demonstrated the preference for postoperative telemedicine appointments and established the feasibility of the telemedicine visit as a first postoperative follow-up in a clinic staffed by nurse practitioners or physician assistants.
The management of business or the business of management?
Authors: Ainley Patrick
Published: October 2017

Business is a large and diffuse activity that is growing larger with the expansion of the new market-state in which virtually all former-state services are contracted out to be run as businesses, if not yet directly for profit, then in heightened competition for customers.
Service quality of household toilets in rural settlements of India: an assessment from the users' perspective
Authors: Rashid Mohammad , Pandit Debapratim
Published: October 2017

User satisfaction with the perceived service quality of household toilets and its attributes is one of the important factors that affect users' attitudes towards toilet use. In this study, the perceived service quality of household toilets is assessed using data on users' satisfaction with individual service quality attributes and overall service quality in Gaya district of Bihar, India. The data collected from 723 households are analyzed using factor analysis and structural equation modeling (SEM). Then, an ordered logistic regression is applied to establish the relationship between the latent parameters and user satisfaction with the overall service quality of toilets. The latent factor, ‘toilet structure’ is found to be more important in users' assessment of the overall satisfaction followed by ‘availability of water’ and ‘toilet maintenance’. The identified latent factors are further analyzed in terms of their variation across socioeconomic groups, which showed that households belonging to socioeconomically marginalized sections of society are dissatisfied with their toilets. The service quality of household toilets constructed using subsidies mostly by the socioeconomically marginalized households is perceived as poor. The study highlights the importance of different dimensions of household toilets which would help policy makers in designing more effective policies on rural sanitation.
Fuzzy Logic in Carbonate Reservoir Quality Assessment: A Case Study from Tarim Basin, China
Authors: Liu Weifu
Published: October 2017

Introduction:

To address reservoir quality assessment in highly complex and heterogeneous carbonate reservoirs, a methodology utilizing fuzzy logic is developed and presented in this paper. Based on carbonate reservoir characteristics, three parameters reflecting the macroscopic and microscopic of storage abundance, permeability, and median of pore throat radius were selected to establish the factor set and the evaluation criteria. After analysis of core and test data, a membership function is constructed by semi-drop trapezoid method and the weight formula is also determined by reservoir factor sub-index. The developed method then is used to evaluate a carbonate reservoir in the Tarim Basin in China. Based on the result of single well evaluation, the plane classification map of the carbonate reservoir quality is constructed. Results obtained from reservoir quality assessment in the K32 well show that I-level, II-level, and III-level reservoir qualities account for 58%, 37%, 5% of the reservoir, respectively. The results are consistent with the actual production data demonstrating reliability of the proposed method for reservoir quality assessment practices in usually very complex and heterogeneous carbonate reservoirs.

Background:

Carbonate reservoirs are complex and heterogeneous and this makes their evaluation a difficult task.

Objective:

To overcome the uncertainties associated with evaluation of complex carbonate reservoirs a reliable method to accurately evaluate carbonate reservoirs is presented.

Methods:

Fuzzy logic is used to evaluate a carbonate reservoir from Tarim Basin in China. Based on carbonate reservoir characteristics, three parameters reflecting the macroscopic and microscopic of storage abundance, permeability, and median of pore throat radius are selected to establish the factor set and to evaluate the criteria of carbonate reservoir. After the analysis of core and test data, a membership function is reasonably constructed by semi-drop trapezoid method and the weight formula is also determined by reservoir factor sub-index.

Results:

An effective methodology for the evaluation of reservoir quality in carbonate reservoirs is established by using fuzzy logic. In addition, an example reservoir from China is used to demonstrate the applicability of the developed method.

Conclusion:

Based on the result of single well evaluation, the plane classification map of the carbonate reservoir is constructed. Favorable zones in the reservoir are also delineated. Evaluation results are consistent with the actual production data of gas and oil which proves that the proposed method is instrumental in reservoir quality assessment.
Penerapan TGT-Chempuzzle pada pembelajaran hidrokarbon untuk meningkatkan prestasi belajar kimia peserta didik
Authors: Pertiwi Yuliyanti Hana , Masykuri Mohammad
Published: October 2017

Penelitian ini bertujuan untuk meningkatkan prestasi belajar kimia peserta didik pada pembelajaran hidrokarbon dengan penerapan model pembelajaran Teams Games Tournament (TGT) menggunakan Chempuzzle. Penelitian ini merupakan Penelitian Tindakan Kelas yang terdiri atas dua siklus. Setiap siklus terdiri atas tahap perencanaan, pelaksanaan, observasi, dan refleksi. Pada siklus I diterapkan model pembelajaran Teams Games Tournament (TGT) menggunakan Chempuzzle pada materi hidrokarbon, sedangkan siklus II diterapkan model pembelajaran yang sama tetapi hanya pada indikator materi yang belum tuntas pada siklus I. Teknik pengumpulan data diperoleh melalui wawancara, observasi, angket, dan tes. Teknik analisis data yang digunakan adalah analisis deskriptif kualitatif. Hasil penelitian menunjukkan bahwa penerapan model pembelajaran Teams Games Tournament (TGT) menggunakan Chempuzzle dapat meningkatkan prestasi belajar kimia peserta didik pada pembelajaran hidrokarbon. Peningkatan prestasi belajar aspek kognitif meningkat dari 42,9% pada siklus I menjadi 77,1% pada siklus II. Persentase aspek afektif pada siklus I adalah 100%, sehingga pada siklus II tidak dilanjutkan karena semua indikator sudah tercapai.Kata Kunci: Teams Games Tournament (TGT), chempuzzle, hidrokarbon, prestasi belajar The Implementation Tgt-Chempuzzle Of Hydrocarbon To Improve Student’s Chemistry Learning Achievement AbstractThis research aims to improve student’s chemistry learning achievement of Hydrocarbon with the implementation of Teams Games Tournament (TGT) learning model using Chempuzzle. This research was a Classrom Action Research which consist two cycles. Each cycles consist of planning, action, observation, dan reflection phases. Both use Teams Games Tournament (TGT) learning model using Chempuzzle in hydrocarbon material, but on the second cycle only use unfinished indicators in the first cycle. Data were collected through interview, observation, questionnaire, and test. Data were analyzed by technique of qualitative descriptive. The result of the research showed that the implementation of Teams Games Tournament (TGT) learning model using Chempuzzle could improve student’s chemistry learning achievement of hydrocarbon. The improvement of student’s learning achievement cognitive aspect increase from 42,9% in the first cycle to 77,1% in the second cycle. The affective aspect percentage in the first cycle was 100%, so the second cycle is discontinued because all indicators have been achieved.Keywords: Teams Games Tournament (TGT), chempuzzle, hydrocarbon, learning achievement
Developing PBL kit by utilizing blog in order to improve scientific process and problem solving skills in physics learning
Authors: Ulva Siti Maria
Published: October 2017

The study aimed at generating PBL-based learning kit product by utilizing blog, at meeting the criteria of learning kit feasibility, at testing the effectiveness of learning kit that the researcher had developed and at identifying the learning participants’ scientific process and problem solving skills. In conducting the study, the researcher implemented the 4-D Model. The learning kit development started involved preliminary study, product design, expert and practitioner test, limited experiment and field experiment. The instruments that had been deployed in conducting the study consisted of validation sheet, learning management observation sheet, student response sheet, teacher interview sheet and learning results test. This study generated a product that consisted of lesson plan, teacher’s book, student’s book, student’s working sheet, blog and learning results assessment. The validation results showed that the learning kit that had been developed were feasible for implementation. Then, the experiment results showed that the learning kit that the researcher had developed met the criteria of effectiveness. Based on the pretest and the posttest results that was administered during the field experiment, students’ physics learning has increased approximately 17.10 point from the pretest average score, namely 58.20, and from the posttest average score, namely 75.30.
Studi kinerja guru lulusan Program Studi Pendidikan Kimia Universitas Negeri Yogyakarta di Daerah Istimewa Yogyakarta
Authors: Jayanti Kresni Dwi , Senam Senam
Published: October 2017

Penelitian ini merupakan penelitian survei yang bertujuan untuk:(1) mengetahui kinerja guru lulusan program studi pendidikan kimia FMIPA UNY yang mengajar di SMA dan SMK di Daerah Istimewa Yogyakarta ditinjau dari kompetensi pedagogik, kepribadian, sosial dan profesional dan (2) mengetahui kinerja guru lulusan program studi pendidikan kimia FMIPA UNY dalam perencanaan, pelaksanaan dan penilaian pembelajaran di SMA dan SMK di Daerah Istimewa Yogyakarta (DIY). Penelitian ini merupakan penelitian survei dengan populasi penelitian guru kimia di 3 SMA dan 14 SMK di DIY. Pengumpulan data dilakukan dengan observasi, angket dan wawancara. Hasil penelitian menunjukkan bahwa (1) kinerja guru kimia pada kompetensi pedagogik, kepribadian, sosial dan profesional memiliki kriteria baik. (2) kinerja guru kimia hasil observasi mengenai perencanaan, pelaksanaan dan penilaian pembelajaran memiliki kriteria baik. Hasil tersebut menunjukkan bahwa kinerja guru kimia lulusan program studi pendidikan kimia UNY di SMA dan SMK di DIY secara umum adalah baik.Kata Kunci: kinerja guru, kompetensi guru A Performance Study of the Teachers Graduating from the Chemistry Educational Program of the State University of Yogyakarta Special Region AbstractThis study is a survey which aims to: (1) determine the performance of the teachers in secondary school in Yogyakarta Special Region who graduated from UNY Chemistry Educational Program Faculty of Mathematics and Science, in term of the pedagogic, personality, social and professional competences. (2) determine the performance of the teachers in secondary school in Yogyakarta Special Region who graduated from UNY Chemistry Educational Program Faculty of Mathematics and Science, in term of planning, implementation, and assessment of teaching The population of this survey was chemistry teachers at some of high school and vocational school in Yogyakarta Special Region. Data collection instruments are observations, questionnaires, and interviews. The results of this study showed that (1) the performance of chemistry teachers on pedagogical, personality, social and professional has a good criteria.(2) the performance of chemistry teacher in planning, implementation, and assessment of learning has good criteria. This result showed that the performance of the teachers in secondary school in Yogyakarta Special Region who graduated from UNY Chemistry Educational Program Faculty of Mathematics and Science generally is good.Keywords: teacher's performance, teacher's competence
Pengembangan perangkat penilaian hasil belajar dalam pembelajaran tematik integratif kelas V SD
Authors: Prasetyo Teguh
Published: October 2017

Penelitian ini bertujuan untuk: (1) menghasilkan perangkat penilaian yang layak untuk pembelajaran tematik-integratif kelas V SD, (2) mengetahui kepraktisan perangkat penilaian yang dikembangkan, dan (3) mengetahui keefektifan perangkat penilaian di kelas V SD pada subtema Komponen Ekosistem. Penelitian pengembangan ini mengacu pada model pengembangan 4-D dari Thiagarajan, Semmel, & Semmel yang telah dimodifikasi menjadi tiga prosedur pengembangan, yaitu: (1) define, (2) design, dan (3) develop. Subjek uji coba pengembangan terdiri dari SDN Godean 1, SDN Cebongan 1, dan SDN Purwomartani. Hasil penelitian menunjukkan bahwa perangkat penilaian hasil belajar dalam pembelajaran tematik-integratif di kelas V SD pada subtema Komponen Ekosistem layak digunakan, praktis, dan efektif. Selain itu produk juga dapat mengukur ketuntasan prestasi belajar peserta didik.Kata Kunci: perangkat penilaian; pembelajaran tematik-integratif; sekolah dasar Developing assessment kits of learning outcomes  on thematic integrative learning in class V SDAbstractThis study aims to: (1) produce a feasible assessment kits for thematic integrative learning in class V SD, (2) determine the practicality of assessment kits developed, and (3) determine the effectiveness of assessment kits in class V SD in subtheme Ecosystem Components. The research refers to the 4-D model of the development of Thiagarajan, Semmel, & Semmel which has been modified into three procedures of development, namely: (1) define, (2) design, and (3) develop. The trial development subject consists of SDN Godean 1, SDN Cebongan 1, and SDN Purwomartani. The results showed that the assessment kits of learning outcomes in thematic-integrative learning in class V SD in subtema Ecosystem Components fit for use, practical, and effective. In addition, the product can also measure mastery learning achievements of learners.Keywords: assessment kits, thematic-integrative learning.
Peningkatan berpikir kritis dan prestasi belajar melalui metode inquiry pada siswa kelas IV SD
Authors: Lastriningsih Lastriningsih
Published: October 2017

Penelitian ini bertujuan meningkatkan kemampuan berpikir kritis dan prestasi belajar pada ranah pengetahuan, sikap, dan keterampilan melalui metode inquiry pada pembelajaran tematik integratif siswa kelas IV SD Kasongan Bantul. Penelitian ini adalah penelitian tindakan kelas (PTK) yang dilaksanakan dalam tiga siklus. Setiap siklus terdiri dari dua pertemuan. Subjek penelitian adalah siswa kelas IV SD Kasongan Bantul sebanyak 20 siswa. Teknik pengumpulan data yang digunakan adalah tes, dan observasi. Instrumen yang digunakan adalah soal tes uraian, pilihan ganda, dan rating scale. Hasil penelitian menunjukkan bahwa penerapan metode inquiry pada pembelajaran tematik integratif dapat meningkatkan kemampuan berpikir kritis dan prestasi belajar dalam ranah pengetahuan, sikap, dan keterampilan.Kata kunci: berpikir kritis, prestasi belajar, metode inquiry. Improving critical thinking and learning achievementthrough inquiry method on grade IV elementary schoolAbstract This study aims to improve the ability of critical thinking and learning achievement in terms of knowledge, attitudes, and skills through inquiry method on integrated thematic learning of the fourth grade students of Elementary School Kasongan Bantul. This research was classroom action research (CAR) which was implemented in three cycles. Each cycle consisted of two meetings. The subjects were 20 grade IV students of Elementary School Kasongan Bantul. Data collection techniques used were tests, and observations. The instruments used were an essay test, multiple choice test, and rating scale. The results show that the application of the inquiry method on thematic integrative learning can improve critical thinking skills and learning achievement in terms of knowledge, attitudes, and skills.Keywords: critical thinking, learning achievement, inquiry method.
The influence of open-ended and STAD method on the mathematical problem-solving skills in terms of learning achievement
Authors: Alman Alman
Published: October 2017

This study is a quasi-experimental research using factorial design. This study aimed at finding the facts that had been resulted from the different influence caused by the use of Open-Ended method and that of STAD method on the students’ mathematical problem-solving skills in terms of learning achievement. The learning achievement was categorized into two types namely the high achievement and the low achievement. The population in this study was Grade V students from SD Negeri Serayu. The data were analyzed by ANAVA univariate test. The results of the study were as follows. First, there have been differences in the mathematical problem-solving skills of the students who had been taught using Open-Ended method and those who had been taught using the STAD method. Second, there were also differences on the students’ score. For the students who had been taught using the Open-Ended method, the highest posttest average score of their learning achievement was 95.71 while the lowest post-test average score of their learning achievement was 63.92. These students’ total average score of learning achievement was 81.04. On the other hand, for the students who had been taught using STAD the highest posttest average score of their learning achievement was 95.50 while the lowest posttest average score of their learning achievement was 70.00. These students’ total average score of learning achievement was 89.13. Third, there has not been any differences between the Open-Ended method and the STAD method.
The implementation of school-based lesson study at elementary school
Authors: Purnomo Purnomo
Published: October 2017

This study aims to describe and interpret the implementation of school-based lesson study in SDN I Kretek. This study uses the qualitative research. The data were collected through in-depth interviews, participant observation, field notes, and documentation. The data validity was determined through sources and techniques triangulation. The data were analyzed using the Interactive Analysis Model from Miles and Huberman. The results show: (1) the planning of school-based lesson study program at SDN 1 Kretek has been implemented from the beginning of the school year 2014/2015 by establishing school-based lesson study team. This team is responsible for planning, managing, and evaluating school-based lesson study program at SDN 1 Kretek, (2) school-based lesson study at SDN 1 Kretek is implemented in three phases, namely planning, implementation, and reflection, and (3) The evaluation of lesson study is conducted by each teacher who has conducted the open class and conducted thoroughly with a meeting by a team of school-based lesson study SDN 1 Kretek at the end of the school year.
Developing a thematic-integrative instructional kit based on PBL model for fourth graders
Authors: Helmon Arnoldus
Published: October 2017

This study aims at producing a suitable and effective thematic-integrative instructional kit based on the PBL model to improve the critical thinking ability and care-for-environment character of the fourth graders of SDN Serayu. It used the R&D design of Borg and Gall. The subjects were teachers and students of grade four of SDN Serayu, Yogyakarta City. The data were obtained through interviews, a questionnaire, observation, and a test. The product effectiveness was tested by using a quasi-experiment. The data were analyzed qualitatively and quantitatively through t-test at 95% confidence interval. The results showed that the product is suitable for use, which is evidenced by the mean score of syllabi at 44.5, lesson plan at 74, the instructional textbook at 56.5, students worksheet at 33.5, and the assessment instrument at 21, all of which are in a very good category. The product could improve the students’ critical thinking ability which is evidenced by the significance value standing at 0.000 for t-test of two experimental groups (IVA and IVC) with the control group  (IVB). The product was effective in improving the care-for-environment character of students which is evidenced by the significance value standing at 0.000 for t-test of two experimental groups with the control group.
A content analysis of thematic-integrative, scientific approach, and authentic assessment in the second grade of elementary school textbook theme 6
Authors: Adi Yogi Kuncoro
Published: October 2017

The study was detailing: (1) the thematic-integrative content; (2) the scientific approach content; and (3) the authentic assessment content in teacher’s book and student’s book. The study was a content analysis using a qualitative approach. The 2013 Curriculum textbooks for Grade 2 students on the theme of water, earth, and sun which consisted of teacher’s book and student’s book that had been the subject in this study, the thematic-integrative content, the scientific approach content, and the authentic assessment content were the objects in this study. The data analysis technique that had been implemented consisted of unit selection, sample selection, data recording, data reduction, conclusion drawing, and narrative. The results of the study show that: (1) the thematic-integrative contains the aspect of integration and centers on the students’ integration; (2) the use of scientific approach is not always in sequence so that not all indicators in each aspect of scientific approach has been found in each sub-theme; and (3) in terms of authentic assessment content, not all indicators have been found.
Kinetic Degradation of Myristicin, Elemicin, and Safrole in Encapsulated Banda Nutmeg (Myristica fragrans Houtt) Oleoresin
Authors: Amrih Dewi , Hidayat Chusnul , Hastuti Pudji
Published: October 2017

Spices, in the form of oleoresin, have advantages as a flavoring agent. Nutmeg oleoresin compounds that play an important role in the formation of nutmeg flavor are myristicin, elemicin, and safrole. These compounds are not stable, so that the quality of oleoresin decreased easily. An alternative to overcome this problem is the encapsulation of oleoresin using spray drying techniques. The objective of this research was to evaluate the physicochemical properties of oleoresin with respect to the degradation of myristicin, elemicin, and safrole of nutmeg oleoresin. Microencapsulated nutmeg oleoresin was prepared using 12% WPC and 88% maltodextrin as encapsulate materials. It was stored in dark glass bottles at a various temperature, namely 30°C, 40°C, 50°C, 60°C, and 70°C, for 0, 4, 7, 10, 14, 21, 28, 35, 42, 49, 56 and 63 days. The content of myristicin, elemicin, and safrole were analysed. The results showed that myristicin, elemicin, and safrole in the encapsulated nutmeg oleoresin decreased during the storage until 28 days of storage and then they were relatively stable until 63 days. The activation energy of myristicin, elemicin, and safrole were 2.21 kJ/mol.K, 2.71 kJ/mol.K and 3.22 kJ/mol.K, respectively.
Extract Corn Silk with Variation of Solvents on Yield, Total Phenolics, Total Flavonoids and Antioxidant Activity
Authors: Haslina Haslina , Eva Murtiari
Published: October 2017

Corn silk is a by product or waste that is commonly used as a traditional medicine that contain bioactive compounds such as volatile oils, steroids, alkaloids, tannins, flavonoids, chlorogenic acid and phenolic compounds, containing protein, carbohydrates, minerals (Ca, Mg, Cu , Zn, Fe and Mn), higher crude fiber, vitamin B, vitamin C, vitamin K, steroids such as sitosterol and stigmasterol, alkaloids, saponins, tannins, flavonoids, anthocyanins, protokatekin, vanilic acid, derivatives hasperidin and quersetin, phenols, terpenoids and glycosides, maysin, β-carotene, beta-sitosterol, geraniol, hordenin, limonene, menthol and viteskin also a good source of poliphenol as antioksidan. Solvent used for the extraction of flavonoid compounds are methanol, ethanol, acetone and ethyl acetate. Basic separation by solvent extraction is the difference in the solubility of each composition in compaction with solvent. Solubility is influenced temperature, stirring speed, the extraction time, comprehensive tangent plane solids by solvent extraction and frequency.This study aims to extract corn silk by using a variation of solvent type in terms of yield, total phenols, flavonoids and antioxidant activity.The experimental design used in this study is completely randomized design (CRD) 1 factor with 5 replications. Solvent: methanol: water (85:15) (v/v) ethanol: water (85:15) (v/ v), ethyl acetate: water (85:15) (v/v), acetone: water (85 : 15) (v/v). Furthermore, the data obtained were analyzed variants and if there is a difference between treatments continued by Duncan Multiple Range Test (DMRT) at 5% level.Variations in the type of solvent significant (p <0.05) to the yield, total phenol, total flavonoids and antioxidant activity. Variations in the type of solvent with the highest yield at a ratio (methanol: water), and the ratio (ethanol: water), then the ratio (acetone: water) and the lowest ratio of (ethyl acetate: water). At ratio (methanol: water) obtained yield is 65.8%, total phenol ie 45350.27 mg / kg GAE, total flavonoids 291.28 mg QE / kg and activities of antioxidant that is 92.1%.
Potential of Liquid Smoke from Palm Kernel Shell as Biopreservative to Tuna (Thunnus sp) Fish Protein
Authors: Lasindrang Musrowati
Published: October 2017

The purpose of this research was to evaluate the role of liquid smoke of oil palm kernel as “ biopreservative” on the fish during storage toward chemistry/biochemical or microbiological change at to tuna (thunnus sp) fish.This research was carried out in three steps that is: 1) Making liquid smoke with temperature pirolysis 4000C during 90 minutes and liquid smoke fractionation in rank: F1 : liquid temperature 1000C; F2: 101 - 1250C; F3: 126 – 1500C; F4: 151 – 2000C. 2) Proximate analysis of liquid smoke FO and Fraction F2 to  tuna fish that analysed with TVB, Total Bacterium, total protein content . The result indicates that the phenol and acid content was more increase with higher fractionation temperature while the carbonyl content was more reduced with higher fractionation temperature.  The TVB value for Tuna fish muscle without soaking higher liquid smoke (38.93 mg N/100g and 36.27 mg N/100g) compared to tuna fish muscle of liquid smoke soaking (F0) that is 13.87 mg N/100g and 11.73 mg N/100g and also soaking with F2 fraction muscle tuna 12.27 mg N/100g.  Total bacterium (2.67 x 109 cfu/g and 2.10 x 109 cfu / g) compare without soaking liquid smoke (F0) and F2 fraction that is (8.43 x 105cfu/g and 6.23 x 105 cfu /g) and (8.57 x 105 cfu/g and 6.50 x 105 cfu/g).
Performance of the PV Subsystems in Smart Micro Grid Sumba
Authors: Akhmad Kholid , Nurdiana Eka , Aryanto Aryono Nur , Hilal Hamzah
Published: October 2017

Smart Micro Grid (SMG) Sumba is inaugurated in 2012. The SMG consists of sub-system PV of a-Si/μc-Si with capasity 500 kWp, smart generator of 2x135 kVA, VRB of 2x240 kWh, and sub-system control and data communication. The output of the SMG is connected to the grid at 20 kV. Sub-system PV is connected to the 5 unit’s inverter of PV-grid type with each power capacity of 100 kW.At the beginning of operation, sub-system PV is operated at maximum level (100%). Electrical power is about 400 kW-500 kW supplied to the grid in clear daytime continuously from 10:00-15:00. When it is cloudy, the electrical energy supplied to the grid varies according to fluctuations in the intensity of light on the surface of PV arrays. Base load during the daytime in Southwest Sumba Regency at the time is about 1.5 MW, meaning that the contribution of electric energy of PV array is almost 30%. The change of cloud abruptly causes the output of PV to drop significantly, which could lead to black out at the local grid because the generators of PLN are not able to cover the power loss immediately. These restrictions result in Sumba SMG can not be operated optimally. Local power company can not tolerate frequent black outs due to the fluctuating of power injection from PV array.Over time some of the components of VRB are damaged so that the VRB is not enabled. Then, the SMG is applied to the extent of PV-grid connections, with the restriction of the power output of PV array at a rate of 30%, or power supplies 150 kW continuously during the daytime. As the SMG has been operated for about four years, the performance of the PV array has degraded about 20%-30%. The changes evidenced in the form of an electric current-voltage curves of PV module are measured by Sun-Simulator.In this paper, it is also discussed general information about the SMG system built in Southwest Sumba Regency, and specifically reviewing the performance of the sub-systems PV since it was built until now.
Pluriempleo/pluriactividad: factor y consecuencia del cambio de ocupación del suelo en san Bernardino, Texcoco, México
Authors: Galán-Caballero Margarita , Escalona-Maurice Miguel J. , Vivar-Miranda Rufino , Espinosa-Hernández Vicente , Jiménez-Moreno M. Josefa
Published: October 2017

El cambio de ocupación del suelo agrícola por urbano genera la pérdida de importantes zonas agrícolas, aumento de predios irregulares y la modificación de las actividades económicoproductivas. El objetivo del estudio fue analizar el cambio de ocupación de suelo, de agrícola por urbano, en San Bernardino, Texcoco, y su relación con la pluriactividad (diversidad de actividades). La metodología contempla la observación etnográfica y la aplicación de encuestas a ejidatarios de la localidad. La detección de cambio espacial de uso de suelo del periodo 1996-2007 se realizó con las metodologías de Bosque y García (2001), Eastman (2001) y Martínez Vega (1989). El artículo presenta: 1) un análisis sociodemográfico, así como la pluriactividad encontrada; y 2)análisis territorial del cambio de Ocupación del suelo. Se concluye con una reflexión sobre los resultados encontrados, acerca de la relación que hay entre la pluriactividad y el cambio de ocupación del suelo; para el caso de la localidad de San Bernardino la relación es cíclica, donde la primera está actuando como factor y consecuencia; por otro lado se encuentra que la pluriactividad está dirigida al sector terciario y la zona agrícola presenta una pérdida de 4.41 ha por año.
Convergencia regional en México considerando la participación del PIB agropecuario (1940-2010)
Authors: Kido-Cruz Antonio , Kido-Cruz María Teresa
Published: October 2017

En México se debate si el proceso de apertura comercial, iniciado a fines de la década de los ochenta y principios de la de los noventa, ha generado un proceso de divergencia regional. El objetivo de este estudio fue evaluar la evolución del ingreso per cápita en los estados de la República Mexicana, usando el modelo de crecimiento neoclásico y considerando dos criterios de participación agropecuaria. El primero es la inclusión de una variable de cambio estructural del Producto Interno Bruto del sector primario y el segundo es una clasificación de los estados por su participación del producto interno agropecuario y su nivel de empleo en relación con el nivel nacional. Para este estudio se usó un modelo de regresión lineal por mínimos cuadrados ordinarios y datos del período 1940-2010. Los principales resultados muestran un proceso de convergencia absoluta entre los estados cuando se utilizan variables ficticias regionales y de perturbaciones aleatorias. Se concluye que no es posible evidenciar un proceso de divergencia económica, pero sí uno no estable en el tiempo de convergencia económica.
Comprender las fuentes de adquisición de información sobre las prácticas de producción de pollo de traspatio entre las mujeres mayas rurales en Yucatán, México
Authors: Salah-Elkashef Ola Mamdouh , Sarmiento-Franco Luis Armando , Torres-Acosta Juan Felipe de Jesús , Fernández-Souza Lilia
Published: October 2017

Este estudio se llevó a cabo para identificar las fuentes de adquisición de información sobre las prácticas de producción de pollo entre las mujeres rurales en Yucatán. Se utilizaron discusiones en grupos de foco (DGF) y entrevistas individuales frente a frente con un cuestionario prediseñado para recolectar datos de dos pueblos rurales. Dentro de cada pueblo, se realizaron tres sesiones de grupo de foco con mujeres mayas, involucrando a 10-12 participantes en cada una. Las participantes se seleccionaron con base en su nivel de habilidad en las prácticas de producción de pollo de traspatio. Los resultados revelaron que la familia, los amigos/vecinos, su propia experiencia personal y los proveedores de alimento fueron las fuentes de información más importantes utilizadas por las mujeres rurales. Respecto a las fuentes preferidas por las participantes, los agentes de extensión, los capacitadores/especialistas, la familia, los métodos de demostración, los veterinarios y los amigos/ vecinos fueron las fuentes más preferidas, significativamente. Las áreas técnicas de producción de pollo de traspatio sobre las que las mujeres recibieron información fueron alimentos y alimentación, sistemas de alojamiento, control de enfermedades, mercadotecnia y reproducción. Los resultados también mostraron que la poca disponibilidad de los agentes de extensión y el costo de los servicios veterinarios fueron los limitantes más importantes que afectaron la adquisición de información. Las recomendaciones más importantes fueron la necesidad de servicios de extensión y de programas de capacitación como fuentes de información modernas para mejorar sus habilidades de gestión y su conocimiento sobre las prácticas de producción de pollo de traspatio.
An examination of the predictive factors of cyberbullying in adolescents
Authors: Beyazit Utku , Şimşek Şükran , Ayhan Aynur Bütün
Published: October 2017

We examined the factors related to predicting cyberbullying behavior in adolescents, specifically demographics and the use of information and communication technologies. The study participants were 417 adolescents attending high school in Kırşehir, Turkey. We used an individual
information form and a cyberbullying scale to collect information and found that 149 (35.7%) of the adolescents had cyberbullied others at least once. Hierarchical regression analysis showed in Step 1 that age, gender, grade, father's age, and family income were significant factors predictive
of cyberbullying, and in Step 2 that owning a computer rather than just having access to one in a public library or Internet cafe, parental control of use of the Internet, and previously being bullied on the Internet were significant predictive factors. Based on these findings, we propose
that effective strategies for the prevention of cyberbullying are parental supervision of adolescent use of information and communication technologies, education for parents and teachers, and offering information technology communication (media) literacy courses in schools.
Efecto de la Reforma Integral de la Educación Media Superior en los profesores de matemáticas en México: estudio de caso
Authors: García-Rodríguez Martha Leticia , Benítez-Pérez Alma Alicia , Vela-Herrera Fabiola
Published: October 2017

Las reformas educativas iniciadas en Europa, influyeron en un gran número de países en el mundo incluido México; estos hechos se relacionan con las reformas curriculares del bachillerato en México. La Dirección General de Bachillerato (DGB), de México fue la encargada de impulsar estas para responder a los requerimientos de la sociedad del conocimiento y del desarrollo sustentable. En 2011 en el Instituto Nacional de Evaluación Educativa (INEE, 2011) se realizó un diagnóstico sobre la situación en que se encontraba la educación media superior en México y se encontró que una cantidad importante de estudiantes no lograba adquirir los aprendizajes previstos en la educación básica. Estos antecedentes fueron el origen de una investigación que tuvo como propósito analizar, mediante un estudio de caso, los elementos de la Reforma Integral de la Educación Media Superior (RIEMS) que han adoptado los profesores del nivel medio superior del Instituto Politécnico Nacional, como parte de sus conocimientos, de su práctica en el aula y de sus criterios de selección de libros de texto y materiales didácticos. Se diseñó un cuestionario de 32 ítems organizados en cuatro dimensiones; los ítems recaban información de la formación de los profesores; de su conocimiento de la reforma; de su actividad en el aula, y de los libros de texto que utilizan para su labor docente. Se concluye que el programa de estudios de Álgebra no se ha constituido como una herramienta de apoyo para que el docente trabaje conforme los lineamientos de la Reforma Integral de la Educación Media Superior en México. La principal debilidad identificada en el programa de la UA Álgebra fue la falta de información sobre materiales o libros de textos elaborados de acuerdo con los lineamientos de la RIEMS y que sean accesibles para los profesores.
Planes padrino en instituciones como mecanismo de deserción
Authors: Portilla-Peña Gladys Amanda , Agudelo-González Yuleima
Published: October 2017

La investigación se desarrolló en el marco de la investigación cuantitativa, correlacional, explicativa. Su objetivo fue analizar el proyecto “plan padrino” con el sector productivo de la región para estimular el apoyo económico a estudiantes en riesgo de deserción. Resultados: un 50% de los jóvenes que ingresan por primera vez y son apadrinados desertan por otras causas. La deserción disminuyó por año apoyada de factores académicos. Conclusión: El plan padrino permitió estudiar entre 1 y 4 jóvenes por semestre, no tuvo relevancia significativa en la deserción de las instituciones de educación superior.
La motivación y las matemáticas
Authors: Pacheco-Carrascal Norfelino
Published: October 2017

Se presenta un breve punto de opinión con respecto a la importancia de la motivación, en el aprendizaje en esta ocasión de las matemáticas, teniendo como punto de partida la falta de entusiasmo y deseo de aprender de los estudiantes con los que en el transcurso de mi labor académica y de la observación he visto evidenciada en los estudiante a los cuales durante varios años les he orientado esta asignatura, y que generalmente han mostrado poco interés por desarrollar su aprendizaje de manera al menos básica para salir adelante en sus cursos respectivos. Analizaremos, algunos aspectos como: ¿qué estar motivado?, ¿qué me motiva a realizar las cosas?, ¿de qué manera me han motivado a estudiar?¿cómo me han motivado a estudiar matemáticas?, a través de los cuales trataremos de entender y comprender como la motivación resulta ser un aspecto importante en el proceso de aprendizaje desde el punto de vista intrínseco y extrínseco en el estudiante. Además algunos aspectos de como motivar a nuestros estudiantes desde nuestra perspectiva de docentes.
Estudio correlacional entre la modalidad de educación pública o privada y el estilo de aprendizaje
Authors: Rincón-Álvarez Gerson Adriano , Villamizar-Jaimes Daniel , Pabón-Galán Carlos Antonio
Published: October 2017

Siempre ha existido una gran discusión sobre, la diferencia entre la educación pública y privada, referente a muchos tópicos de enseñanza aprendizaje como: la metodología, la filosofía, la preparación de los estudiantes, y en lo referente a este artículo, las diferentes estrategias que emplean los estudiantes para adquirir y fortalecer sus aprendizaje. La identificación de los estilos de aprendizaje y el cómo se desenvuelve el estudiante en el medio universitario es de gran importancia para la adecuación de las prácticaspedagógicas del docente y la construcción de los micro-currículos de las asignaturas, que conforman el pensum académico del programa. Con el fin de generar un mejor ambiente de aprendizaje, esta investigación identifica los estilos de aprendizaje de los estudiantes del programa académico de Licenciatura en Matemáticas de la Facultad de Educación, Artes y Humanidades de la UFPS, enmarcado en la teoría del modelo de Kold. Se concluye que el estilo predominantes en la población objeto de estudio fue el reflexivo  seguido del pragmático y por último el activo y el teórico respectivamente. Se finaliza con la aplicación de las pruebas de independencia y correlación de Spearman, hallando alta relación entre los estilos reflexivo y pragmático dentro del modelo de Kold, pero ninguna relación entre el estrato social y los estilos de aprendizaje.
Análisis epidemiológico de la diarrea en Santander y Norte de Santander
Authors: Gallardo-Lizarazo María del Pilar
Published: October 2017

La enfermedad diarreica aguda (EDA), a nivel mundial, se encuentra establecida como la segunda causa de muerte, afectando principalmente a los menores de 5 años sin desconocer los demás grupos cronológicos y sin distinguir características étnicas. En Colombia ocupa el segundo lugar de morbi-mortalidad en la población menor de cinco años, especialmente en los municipios con mayor porcentaje de necesidades básicas insatisfechas; por ello se han identificado estrategias para educar a las madres o cuidadores sobre el manejo adecuado en casa y centros de salud de primer nivel buscando la oportuna atención y realización de las convenientes prácticas de hidratación, para lo cual se creó la estrategia de Atención Integrada de las Enfermedades Prevalentes de la Infancia (AIEPI) que está encaminada en disminuir la mortalidad por las enfermedades prevalentes de la infancia específicamente en menores de 5 años. En el presente artículo se pretende describir la situación epidemiológica de EDA en los departamentos de Santander y Norte de Santander así como de las creencias, costumbres y conocimientos en madres y cuidadores sobre los signos de alarma en EDA en niños menores de 5 años de edad.
La violencia en la escuela
Authors: Villamizar-Ibarra Jesús
Published: October 2017

El problema de violencia en las aulas es un tema muy generalizado en los ambientes de enseñanza. Las situaciones de acoso en el ámbito escolar incluyen tanto al alumnado como a los propios docentes, con quienes se debe trabajar para comprender y reducir el problema que tanto afecta la convivencia pacífica. El objetivo del presente artículo de revisión fue analizar elementos estructurales en materia de violencia en la escuela, teniendo en cuenta los elementos culturales y educativos del mundo actual, que involucran diversos aspectos como la pedagogía violenta relacionada con la burocratización de la organización educativa y el gremialismo socio económico. Se aplicó el método de selección de información de carácter explicativo y analítico de investigación documental, según fuentes secundarias de información, con el objeto de familiarizar al investigador con el tema objeto del conocimiento de tipo cualitativo. El documento resalta los principios de participación, la corresponsabilidad, la autonomía, la diversidad y la integralidad, reconocimiento a los niños, niñas y adolescentes como sujetos de derechos y a la comunidad educativa como la responsable de formas para el ejercicio de los mismos, promulgados por el Sistema Nacional de Convivencia Escolar y recientemente por la Ley 1732 de Septiembre de 2014, por la cual se establece la cátedra de la paz en todas las instituciones educativas del país, con la finalidad de garantizar la creación y el fortalecimiento de una cultura de pazen Colombia.