bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Different Adhesive Systems Used for Immediate Dentin Sealing on Bond Strength of a Self-Adhesive Resin Cement to Dentin
Authors: Ferreira-Filho RC , Ely C , Amaral RC , Rodrigues JA , Roulet J-F , Cassoni A , Reis AF
Published: April 2018

Objective:

The purpose of this study was to investigate the immediate and three-month water storage behavior of adhesives when used for immediate dentin sealing (IDS).

Methods and Materials:

Four adhesive systems were used to perform IDS: a one-step self-etch (Xeno V), a two-step self-etch (Clearfil SE Bond), a two-step etch-and-rinse (XP Bond), and a three-step etch-and-rinse (Optibond FL). For the control group, IDS was not performed. The self-adhesive resin cement RelyX Unicem was used for the luting procedures. After seven days of water storage, specimens (n=6) were sectioned into beams (n=5) with an approximately 1-mm2 cross-sectional area. Half of the specimens were tested in tension after seven days of water storage at 37°C, while the other half was stored for three months prior to testing in tension using a universal testing machine (1 mm/min). The failure pattern was determined using a stereomicroscope and scanning electron microscopy. Microtensile bond strength (μTBS) data were statistically analyzed by two-way analysis of variance and Tukey post hoc test (α=0.05).

Results:

After seven days, the control group presented the lowest μTBS but did not differ from XP Bond and Clearfil SE Bond. After three months, there was no μTBS difference between the IDS groups and the control.

Conclusions:

After seven days of water storage, the groups with IDS presented higher μTBS values than the control group, although XP Bond and Clearfil SE Bond did not present significant differences. However, after three months of storage in water, IDS groups did not differ significantly from control group, which did not receive IDS.
Clinical Follow-up of a Fissure Sealant Placed Using Different Adhesive Protocols: A 24-month Split-mouth Study
Authors: Yazici AR , Bayazit E Ozturk , Kutuk ZB , Ozgunaltay G , Ergin E , Berber A
Published: April 2018

The purpose of this study was to evaluate the retention rates of a fissure sealant placed using different adhesive protocols over 24 months. Twenty-four subjects with no restorations or caries received fissure sealants (Clinpro Sealant, 3M ESPE) placed using different adhesive protocols. A total of 292 sealants were placed as follows by two previously calibrated dentists using a table of random numbers (n=73): group I, acid-etch/without adhesive; group II, with a self-etch adhesive (Adper Easy Bond, 3M ESPE); group III, with an etch-and-rinse adhesive (Adper Single Bond 2, 3M ESPE); group IV, with acid + self-etch adhesive (Adper Easy Bond). Two other calibrated examiners independently evaluated the sealants at baseline and at six-, 12-, 18-, and 24-month recalls. Each sealant was evaluated in terms of caries formation being present or absent and retention using the following criteria: 1 = total retention, 2 = partial loss, and 3 = total loss. Pearson's χ2 test was used to evaluate differences in retention rates among the sealants for each evaluation period. At the end of 24 months, total retention rates were 57.5%, 27.4%, 84.9%, and 76.7% in the acid-etch, self-etch adhesive, etch-and-rinse adhesive, and acid + self-etch adhesive groups, respectively. Although there were no statistically significant differences between the retention rates among the adhesive protocols at 6 months (p=0.684), significant differences were observed at the 12-, 18-, and 24-month evaluations. At 24 months, the lowest retention rates were observed in the self-etch group (p<0.05). No caries development was observed in any of the groups. The retention rate of sealants placed using self-etch adhesive was poor compared with the other groups.
Properties of a New Nanofiber Restorative Composite
Authors: Yancey EM , Lien W , Nuttall CS , Brewster JA , Roberts HW , Vandewalle KS
Published: April 2018

A new nanofiber-reinforced hybrid composite (NovaPro Fill, Nanova) was recently introduced with reportedly improved mechanical properties. The purpose of this study was to compare the properties (flexural strength/modulus, degree of conversion [DC], depth of cure, and polymerization shrinkage) of the nanofiber composite to those of traditional hybrid composites (Filtek Z250, 3M ESPE; Esthet-X HD, Dentsply). To determine flexural strength and modulus, composite was placed in a rectangular mold, light-cured, stored for 24 hours, and then fractured in a universal testing machine. For degree of conversion, composite was placed in a cylindrical mold, light-cured, and stored for 24 hours. Measurements were made at the top and bottom surfaces using Fourier Transform Infrared Spectroscopy. To determine depth of cure, composite was placed in a cylindrical mold and light-cured. Uncured composite was scraped until polymerized resin was reached. Remaining composite was measured and divided by two. Polymerization shrinkage was determined by placing the composite material on a pedestal in a video-imaging device while light-curing. Shrinkage was determined after 10 minutes. Data were analyzed with one-way analysis of variance and Tukey post hoc test per property (α=0.05). Compared to Filtek Z250, NovaPro Fill had significantly lower flexural strength and modulus, greater volumetric shrinkage, and similar depth of cure, but greater top and bottom DC. Compared to Esthet-X HD, NovaPro Fill had similar flexural strength, shrinkage, and top and bottom DC, but significantly greater depth of cure and flexural modulus.
LKPD Development On MEAs Based-Approach to Improve the Mathematical Representation Ability of Grade X Students
Authors: Rostari Riren , Irwan Irwan , Yulkifli Yulkifli
Published: April 2018

LKPD used in school had not been optimal in helping students to improve the mathematical representation ability. It happened because the used LKPD was giving a less opportunity to the students to solve the mathematical representation problems. One of the solutions to do about that problem is to develop LKPD-Modeling Eliciting Activities (MEAs) based approach. The purpose of this study is to produce a valid, practical and effective LKPD-MEAs based approach to improve the students’ mathematical representation. This study is a development research using Plomp model which consists of Preliminary Research, Development or Prototyping and Assessment Phase. The subjects of this study were X grade students of SMAN 3 Padang. The instruments used were LKPD validation sheets, teacher’s response questionnaires, students’ response questionnaires and test. The result of this study is a valid, practical and effective LKPD-MEAs based approach with an average of each is 0,728,  85,39 and 82,41.
The Effectiveness of Group Guidance with Modelling in Increasing The Maturity of Career Choice
Authors: Wahyuni Sisri , Yusuf A. Muri , Efendi Z. Mawardi
Published: April 2018

The maturity of the career choice direction becomes a central idea in the career development of the students. There are still many students who are less thorough in understanding career information. Therefore, the purpose of this study is to look at the effectiveness of group counseling services with modelling in improving student career choices. The research used quasi experimental approach through the design of non equivalent control group. Research subjects seven students experimental group and seven students control group. This research used career maturity choice with reliability 0.86. Then the data were analyzed using Wilcoxon Signed Ranks Test and Kolmogorov Smirnov 2 Independent Samples and Normalized Gain Scores. The result shows that group counseling service with modelling effective for increase the career maturity choices
Development of Stoichiometry Module Based on Problem Solving for 10th Grade of High School Students
Authors: Sholihah Annisa Ush , Dj. Latisma , Efendi Jon
Published: April 2018

One of the learning materials which can be used to enhance student’s understanding of stoichiometry is module based on problem solving. The background of this study is based on interviews to some students who have studied stoichiometry. They stated that the teaching materials used were less interesting and less involved students actively in understanding concept. The aim of this study is to produce learning module and then tested the validity, practicality, and effectiveness so that it can be used in chemistry learning. The type of this research is Research and Development (R&D). Development model used is 4-D model (define, design, develop and disseminate). This module was validated by 4 experts and then was tested to 2 chemistry teachers and 31 students of X Science Grade of SMA N 5 Padang. The data show that this problem solving based module on stoichiometry which has been produced are valid, practical, and effective.
Developing Social Science-History’s Comics- Based Learning Media for the Fifth Grade of Primary School In Pekanbaru City
Authors: Daulay Musnar Indra
Published: April 2018

The purpose of this study was, therefore, to describe the processes and the results of developing the comic-based learning media on the subjects of Social Science-History for the fifth grade of primary school in Pekanbaru City. Research and Development (R&D) and Instructional Systems Design (ISD) of ADDIE was used to develop the media. Validity, practicality, and effectiveness tests were used to qualify the developed product. The developed comic-based learning media was stated “valid” by two media experts (63.33% and 90.83% respectively); by two material experts (77.92% and 96.67% respectively); whilst media validation was 83.33% and materials’ validation was 93.75%. The results of One-to One, Small Group and Field Trials were 88,54%, 93,23%, and 92,20% respectively. In conclusion, the research findings indicated that the developed comic-based learning media were stated valid and can be used in the intended context for the Fifth Grade of Primary Schools in Pekanbaru City.
Correlation of Fasting Blood Glucose With IL-6 Levels in Type-2 Diabetes Mellitus Ethnic Minangkabau
Authors: Yuniarti Elsa , Syamsurizal Syam , Ahda Yuni , Sonata Puja Delfi
Published: April 2018

Diabetes Mellitus (DM) Type 2 is a metabolic disorder disease characterized by an increase in blood sugar (hyperglycemia) due to decreased insulin secretion by pancreatic beta cells or intrusion of insulin function. Hyperglycemia tends to cause oxidative stress where free radical formation exceeds the body's antioxidant defense system resulting in microvascular and macrovascular disorders. Some ethnic groups have a tendency to develop type 2 diabetes mellitus because of differences in diet, lifestyle and physical activity. In addition, ethnicity is also suspected to affect the levels of IL-6. This study aims to determine the correlation of fasting blood sugar levels with IL-6 levels in type 2 diabetes mellitus ethnic Minangkabau. This research is cross sectional comparative research design. The subjects of two groups: DM type 2 and control group (non-DM) who went to the Polyclinic of State University of Padang, Minangkabau ethnic and each consisted of 35 people. Blood glucometer examination with blood sample and IL-6 measurement using ELISA technique with serum sample. Fasting blood sugar levels in patients with Type 2 DM Minangkabau ethnic average 286.2 ± 80.46 mg / dl while non DM 101.26 ± 9.70 mg / dl. Mean IL-6 levels in type 2 DM patients were 16.23 ± 30.12 pg / ml while non-DM of 3.41 ± 1.91 pg / ml was an increase of about 4.7 in patients with type 2 DM Compared to non-ethnic minority of Minangkabau with p value <0,05. The result of research that have been done there is a positive correlation between fasting blood sugar level with IL -6 in patients with Type 2 DM Minangkabau ethnic with r value = 0,44 at p <0.05 which means interpretation of medium correlation strength. Keywords: Type 2 DM, IL-6, ethnic Minangkabau
Coliform Contaminant Analysis at Dug Well in Ungga Village, Central Lombok District, West Nusa Tenggara
Authors: Supardan Dadan
Published: April 2018

Dug well water generally is a daily source of domestic water used by most households in Indonesia. However, the well water excavation does not meet the quality of health standards. Contamination of microorganism in dug well water occurs due to the distance of wells with septic tank, household waste disposal and animal husbandry. One of the bioindicators of contaminated groundwater is the presence of Coliform bacteria in large quantities, such as Escherichia coli, which potentially cause various diseases in human. The objective of this study was to determine the biological contamination of dug wells water in Ungga, Iting Bengkel Village, Central Lombok. This study was observational study and sampling method used purposive sampling with the number of samples was 6 dug wells. The biological contamination indicator was determined by calculating the index of Most Probable Number (MPN) Coliform. The laboratory analysis included the analysis Escherichia coli by MPN. The result showed that a total of 6 wells with distance 3.45 meters and 4.70 meters against septic tank has MPN coliform value 1898 per 100 ml. The result of water samples from 2 dug wells has contaminated by Escherichia Coli and has reached amount 14 per 100 ml (A3) and 16 per 100 ml (B3).
Pengaruh Media (Campuran Beras Dan Ampas Tebu) terhadap Pertumbuhan Trichoderma harzianum dan Daya Hambatnya terhadap Fusarium oxysporum secara In vitro
Authors: Chatri Moralita
Published: April 2018

Jamur Fusarium oxysporum merupakan jamur patogen umumnya ditemukan pada tanaman holtikultura. Jamur ini menyebabkan penyakit layu fusarium. Fungisida sintetis merupakan pilihan yang sering digunakan petani untuk menghambat penyebaran jamur ini. Namun penggunaannya menimbulkan banyak dampak negatif bagi lingkungan. Trichoderma harzianum memiliki sifat antagonis yang dapat menggantikan fungisida sintetis dalam menghambat pertumbuhan F. oxysporum. T. harzianum membutuhkan media pembawa seperti beras. Namun membutuhkan biaya yang cukup tinggi dan bersaing dengan kebutuhan manusia. Untuk itu dilakukan campuran antara beras dan ampas tebu untuk mencari media alternatif. Tujuannya agar mendapatkan media tumbuh yang lebih efektif dan efisien.Penelitian ini menggunakan Rancangan Acak Lengkap dengan 5 perlakuan dan 3 ulangan. Perlakuanya terdiri dari A. Media beras 100%, B. Media ampas tebu 100%, C. Media beras dan ampas tebu (1:1), D. Media beras dan ampas tebu (2:1), dan E. Media beras dan ampas tebu (1:2). Paremeter yang diamati yaitu pertumbuhan T. harzianum, kepadatan konidia, dan persentase hambatan terhadap  F. oxysporum.Hasil penelitian ini menunjukkan bahwa T. harzianum dapat tumbuh pada campuran media beras dengan ampas tebu. Media tumbuh mempengaruhi pertumbuhan, kepadatan konidia, serta daya hambatnya terhadap F. oxysporum Pertumbuhan yang terbaik yaitu pada media ampas tebu 100 %, kepadatan konidia tertinggi pada media beras 100% (11,6 x 109/ mL) dan persentase daya hambat tertinggi pada media ampas tebu 100% (60%). Hal ini menunjukkan bahwa media alternatif terbaik yaitu media ampas tebu 100%. Keywork : Fusarium oxysporum, layu fusarium, media, Trichoderma harzianum
PENGEMBANGAN MODUL PEMBELAJARAN KIMIA BERBASIS MODEL PERUBAHAN KONSEPTUAL ED3U (EXPLORE, DIAGNOSE, DESIGN, DISCUSS, USE) TERINTEGRASI MULTI REPRESENTASI PADA MATERI STRUKTUR ATOM
Authors: Fitriza Zonalia , Gazali Fauzana
Published: April 2018

This research aims to produce a valid chemistry module based conceptual change model Explore, Diagnose, Design, Discuss and Use (ED3U). The steps of this model are align with scientific approach which is an approach used in current curriculum. This model make the student find their own conception and considering their prior conception will resist or they need alternative conception so that they can have scientific conception. In order to optimalize this, the module is presented using three level chemistry representations that are macroscopic, submicroscopic and symbolic. Developments of this module used 4-D model (define, design, develop, disseminate) with check list as a non test instrument for observation in define step. Beside, it also use questioner to determine whether the module is valid or not. The data was analyzed by Kappa Cohen Formula. Based on the three validators who are the chemistry education lecturers and two validators who are lecturers of Design Communication Visual found that the value of k is 0,829 for content validation and 0,69 for graphics validation. It means the module is valid in high category.
PERSEPSI MAHASISWA TERHADAP E-MODUL PEMBELAJARAN MATA KULIAH FISIKA ATOM DAN INTI
Authors: Pathoni Haerul , Jufrida Jufrida , Saputri Ika , Sari Wulan
Published: April 2018

Based on observations in atomic physics and nuclear learning, there are some problems see during two semester of the course such as less using of instructional materials and instructional media in the process of learning. In addition, content of book used are books published in the 1990s years and never have been updated. The quantity of books of atomic physics and nuclear in the library is still very little. Therefore developed electronic modul (E-modul). This research used descriptif research. E-module is made using 3D software pageflip professional. E-Module has been validated by experts for media and content of e-module. The result was perception of students on average 83.5% on core structure module and 89 % on radioactivity module with very good category.
PENGEMBANGAN MODEL REKONSTRUKSI PENDIDIKAN PADA BAHAN AJAR SEL ELEKTROKIMIA BERBASIS GREEN CHEMISTRY
Authors: Yusmaita Eka , Mudzakir Ahmad , Hernani Hernani
Published: April 2018

This study aimed to analyze the construction of teaching materials which are relevant to daily life using the theme of green batteries. The method used the model of educational reconstruction as a framework. This model consisted of three components, which are: analysis of content structure, re-search on teaching and learning, and development of learning settings. The discussion in this study was focused only on the analysis of content structure which required three stages, they are: analysis of literature, clarification of basic context, and modification of the text. First stage would produce indi-cators and learning objectives for cognitive and affective domains, which were based on the content of electrochemistry cells, the context of Li-ion batteries, and the scientific literacy. Second stage was the elementarization process of elektrokimiaic cell content and Li-ion batteries context. Third stage was the process of insertion and abolition of original text to become basic text. Validation through expert judgments was conducted for indicators and learning objectives of cognitive and affective domains based on the Standard of Competence, Basic Competence and competencies in PISA 2009.
EFEKTIVITAS PENERAPAN MEDIA PEMBELAJARAN INTERAKTIF DENGAN SOFTWARE AUTORUN UNTUK MENINGKATKAN KOMPETENSI FISIKA SISWA SMK NEGERI 1 PADANG
Authors: Usmeldi Usmeldi
Published: April 2018

Physics is one of the adaptive subjects in Vocational High School (SMK). Preliminary surveys of the implementation of learning physics at SMK Negeri 1 Padang shows that many students have not mastered the abstract concepts of physics, so students find it difficult to apply them in relevant pro-ductive subjects. Therefore, it is implemented physics learning with interactive learning media. This study aims to determine the effectiveness of interactive learning media to improve the student compe-tence. The study used a quasi experimental method with a pretest-posttest control group design. The subjects of the research were students of eleventh grade in electrical engineering expertise program at SMK Negeri 1 Padang. Data were collected by using observation sheet, achievement test, and ques-tionnaire of student responses to the implementation of learning. The result of the research shows that physics learning with interactive learning media is effective to improve the students’ competence, in terms of (1) students' learning mastered has been achieved, (2) improvement of physics concept of ex-perimental class in medium category, (3) The average score of mastery of the physics concept of the experimental class is higher than the control class, (4) most of the experimental class students stated that the implementation of physics learning with interactive learning media is good. Suggestion to physics teacher to conduct the computer assisted learning with interactive media.
FAKTOR-FAKTOR YANG MEMPENGARUHI HASIL BELAJAR MATEMATIKA SISWA UNTUK PENERAPAN BAHAN AJAR KONTEKSTUAL MENGINTEGRASIKAN PENGETAHUAN TERKAIT DAN REALISTIK
Authors: Helma Helma , Edizon Edizon
Published: April 2018

Mathematics learning on high school should be associated with other sciences and everyday life. In this way, the mathematics learning is more realistic, interesting and meaningful. However, re-ality shows that mathematics learning materials has not been associated with other sciences and eve-ryday life. Initial research find that needs to be develop contextual mathematics material. Before the learning materials are prepared, it is important to know the characteristics of learners in following the learning of mathematics that affect the learning outcomes. There are five factors that influence the learning outcomes, namely background, interest, attitude, motivation and learning styles The purpose of research is to determine the factors that influence learning outcomes. Type of this research is de-scriptive research. The instruments are assessment sheets for learners characteristics and test. The results is factors that influence the learning outcomes of learners directly for the development needs of contextual mathematics teaching materials to integrate related knowledge and realistic approach is the learning style.
PENGUASAAN KETERAMPILAN TATA RIAS PENGANTIN MODIFIKASI BAGI ANGGOTA KARANGTARUNA MELALUI PELATIHAN DENGAN HAND OUT
Authors: Maspiyah Maspiyah Maspiyah
Published: April 2018

Tujuan penelitian ini adalah untuk mengetahui 1) penguasaan keterampilan peserta pelatihan dalam merias pengantin modifikasi bagi karangtaruna Kelurahan Magersari KabupatenSidoarjo, dan 2) respon peserta pelatihan dalam merias pengantin modifikasi bagi karangtaruna Kelurahan Magersari KabupatenSidoarjo. Jenis penelitian ini adalah pre-eksperimen, dengan menggunakan desain one shot case study. Jumlah peserta pelatihan sebanyak 20 orang. Metode pengumpulan data yang digunakan adalah tes praktik, dan angket. Teknik analisis data yang digunakan adalah persentase untuk mengetahuan hasil keterampilan, serta nilai rata-rata (mean) untuk mengetahui respon peserta pelatihan. Hasil pelatihan menunjukkan 1) nilai keterampilan 75-84 sebanyak 15%, nilai 85-94 sebanyak 85%. 2) respon peserta merasa senang mengikuti pelatihan sebanyak 90%, peserta mudah mendapatkan alat dan bahan pelatihan sebanyak 85%, biaya terjangkau sebanyak 85%, penyampaian materi jelas dan mudah dipraktikkan sebanyak 90%, penggunaan hand out membantu memahami materi sebanyak 95%, dan hand out yang digunakan mudah difahami sebanyak 95%.
TINGKAT POPULARITAS DAN PROFITABILITAS MENU MELALUI METODE MENU ENGINEERING DI 3RDCAFE PADANG
Authors: Pasaribu Pasaribu
Published: April 2018

Penelitian ini berujuan untuk mengetahui tingkat popularitas dan profitabilitas menu yang ditawarkan melalui analisis four box. Penelitian ini merupakan penelitian deskriptif dengan data kuantitatif, dengan sampel penelitian ini adalah total populasi yaitu seluruh populasi dijadikan sampel. Jenis data yang akan dipergunakan dalam penelitian adalah data sekunder. Teknik pengumpulan data yang digunakan adalah dokumentasi, observasi dan wawancara. Data dianalisis dengan menggunakan metode menu engineering yang dikelompokkan berdasarkan analisis four box. Hasil penelitian ini menunjukkan bahwa menu yang termasuk pada kelompok star yaitu menu makanan: nasi goreng dan menu minuman: teh es, jus mangga, millo, milkshake, dan fanta. Menu yang termasuk ke dalam kelompok puzzles pada menu makanan: mie goreng, siomay, mie rebus, kentang goreng, nuget dan menu minuman : jus pisang dan kopi. Menu yang termasuk kedalam kelompok plowhorse yaitu menu makanan: tempe medoan dan tahu medoan, sedangkan menu minuman: jus jeruk dan float. Tidak terdapat menu makanan maupun menu minuman pada kelompok dog. Saran bagi pihak 3rd cafe perlunya tindakan akan menu yang termasuk kedalam four box analysis seperti kelompok star cita rasa dan kualitas makanan dipertahankan, pada kelompok puzzle melakukan perubahan akan penampilan menu agar lebih menarik, sedangkan kelompok plowhorse dapat dipaketkan dengan kelompok menu star dengan harga yang relatif murah namun tidak merugikan.
PENGARUH PENAMBAHAN BAWANG PUTIH TERHADAP KUALITAS TELUR ASIN
Authors: Faridah Anni
Published: April 2018

Peningkatan kualitas telur asin dilakukan dengan menciptakan varian baru, salah satunya dengan penambahan bawang putih. Penelitian ini bertujuan menganalisis pengaruh penambahan bawang putih sebanyak 0%, 15%, 30% dan 45% terhadap kualitas warna, aroma, tekstur, dan rasa telur asin. Jenis penlitian yang dilakukan adalah eksperimen murni dengan metode RAL. Variabel yang digunakan yaitu variabel X (penambahan bawang putih) dan variabel Y (kualitas telur asin). Data yang digunakan diperoleh langsung dari 30 panelis semi terlatih. Data dianalisa dengan menggunakan ANAVA, jika berbeda nyata dilanjutkan dengan Uji Duncan. Hasil penelitian menunjukkan terdapat pengaruh penambahan bawang putih terhadap kualitas aroma tidak amis, aroma khas bawang putih, rasa asin, rasa gurih, hedonik aroma serta hedonik rasa. Tidak terdapat pengaruh nyata terhadap kualitas warna orange, tekstur kenyal pada putih telur, tekstur masir pada kuning telur, hedonik warna serta hedonik tekstur telur asin. Kualitas telur asin terbaik menggunakan bawang putih sebanyak 45% (X3).
PENINGKATAN KETERAMPILAN GURU SEKOLAH DASAR MENGGUNAKAN MEDIA INTERAKTIF UNTUK MATERI GEOMETRI DAN PECAHAN
Authors: Sriningsih Riry , Murni Dewi , Helma Helma
Published: April 2018

Based on observations, questionnaires and discussions with some of teacher of elementary school found many problems geometric and fraction material. The problems are: 1. In general, teachers have not used interactive media in explaining mathematic materials, so students are difficult to understand the subject, 2. Teachers have not yet facilitated various learning styles of students, 3. Students' assumptions on difficult mathematical subjects (full of numbers and symbols), so they are phobic with math, 4. Teachers urgently need the consolidation of geometrical and fraction materials through the creation of interactive media that match the material and characteristics of students, 5. Teachers desperately need training on how to design and create interactive media that can interest students to learn on geometry and fraction materials, so that students are no longer fobs with math and can easily understand the material well, 6. Teachers desperately need training on the use / utilization of interactive media that has been created in teaching the geometry and fraction materials. To solve the problem, team try to provide solutions to these problems by providing training on how to design, create and use interactive media especially plane geometry and fraction. The result of training, teachers are already able to design and make interactive media. They can explain plane geometry and fraction material easily, especially how to find the formula of area for instance rectangle, triangle, trapezium, etc. Further impact, students more easily understand the material well.
Fitoremediasi Logam Timbal (Pb) Menggunakan Kiambang (Salvinia molesta) pada Ambang Batas, Kualitas Air Irigasi
Authors: Diliarosta Skunda
Published: April 2018

Sumber daya alam yang begitu dekat dengan manusia adalah air, khususnya air sungai. Peningkatan beban pencemaran terhadap air sungai yang terus menerus akan menjadi penyebab utama menurunnya kualitas air sungai saat ini. Gangguan fisik, kimia dan biologi akan menimpa masyarakat bila mengkonsumsi air sungai yang sudah tercemar oleh limbah industri dan pemukiman baik secara langsung maupun tidak langsung dan perlu adanya upaya-upaya pengendalian pencemaran lingkungan. Logam berat, seperti merkuri (Hg), timbal (Pb), arsenik (As), kadmium (Cd), kromium (Cr), seng (Zn), dan nikel (Ni), merupakan salah satu bentuk materi anorganik yang sering menimbulkan berbagai permasalahan yang cukup serius pada perairan khususnya limbah timbal (Pb) yang masuk ke perairan yang dimanfaatkan untuk aktivitas pertanian. Kiambang juga mempunyai kemampuan hidup yang luar biasa karena dapat tumbuh hidup baik pada media air manapun walaupun media tersebut memiliki sedikit nutrient untuk pertumbuhannya. Keistimewaan ini menyebabkan kiambang dijadikan sebagai filter biologis yang dapat menyerap logam berat
Proposal to Evaluate the Potential of Biogas and Lifetime of Landfills for the Production of Electrical Energy
Authors: Mariana Nalesso Gonçalves  , Matheus Ribeiro Martins  , José Roberto Camacho
Published: April 2018

A study is presented to evaluate the biogas potential of landfills for the production of electric energy. Based on the mathematical method suggested by the Intergovernmental Panel on Climate Change (IPCC) for calculating methane emissions, a program developed in the GNU Octave software that measures these emissions and the energy potential presented by the landfill under study. This is a very important issue on energy production from human waste, and under the topic of Earth environment conservation and cleaning. Through the software developed, a case study was carried out at the Uberlândia-MG-Brasil landfill, presenting the potential for biogas generation and electric energy, as well as the estimation of its useful life. Thus, a comparison was made of the results presented by the program and the actual data of the plant already in operation in the aforementioned landfill. This study showed that the methodology implemented in the software to quantify the potential of biogas and energy in landfills is valid, presenting approximation between real and estimated data during simulation. These are important aspects because they allow the investor in renewable energy, whether it is from the private sector or from the public sector, to have the true dimension of the financial gains and the enormous advantages for the environment.
Improvement of the performance stability of power grid with wind farms using static synchronous compensator
Authors: Shazly A. Mohamed  , N. Luo  , T. Pujol
Published: April 2018

The technological advancements in wind energy conversion have led to increased wind power generation in recent years. Static synchronous compensator (STATCOM) is used extensively in power systems due to its ability of providing the flexible power flow control. The main motivation for choosing STATCOM in wind farms is that it can provide bus bar system voltage support either by supplying or absorbing reactive power into the system, thereby can improve the steadystate stability limits of the network. This paper deals with the impact of STATCOM on the wind farm performance. The wind turbines considered are fixed speed ones with squirrel cage induction generator. In this work the performance of wind farm with and without STATCOM is investigated under fault conditions.
A Comparative Study of Motor Stator Current Analysis and Instantaneous Power Analysis Techniques for the Diagnosis of Gear Faults under Medium Load Conditions
Authors: Alwadie. A
Published: April 2018

Gears are used in the machines to transfer rotational mechanical power. The excessive vibration is produced due to malfunction of the gear which eventually causes machine breakdowns. Conventional vibration analysis method could reliably diagnose the gear faults but high cost of the vibration transducers is the main limitation of this technique. The non-intrusive stator current analysis has been the best alternative to vibration analysis technique. But the capability of the stator current analysis has been reported only on the full load conditions of the motor. This paper presents an alternative nonintrusive condition monitoring technique which utilize the both stator current and voltage to analyze the gear faults in instantaneous power spectra. The experimental test rig has been designed to compare the amplitude sensitivity of the stator current spectra and instantaneous power spectra for gear operating under medium load condition.
Smart Grid Operation with Hybrid Renewable Resources and Electric Vehicle
Authors: Mohamed Ahmed Hassan El-Sayed
Published: April 2018

The utilization of renewable energy resources will significantly increase to achieve clean and sustainable electricity generation. The management of the continuous growth share of variable renewable resources, integration of electric vehicles (EVs) and regulation of grid frequency require effective communication facilities of recent smart grids. In this respect, smart converters can provide efficient power conditioning devices to extract maximum power from renewable resources. In addition, the batteries of EVs could be used as distributed storage and discharge power back into the grid to compensate power deficit and flactuation. Modeling and controlling of the hybrid resources within smart grid were carried out in this paper. The smart converter is switched to track the maximum power point MPPT of the solar panels. In addition, the pitch angle control and DFIG regulation are used to extracte the maximum power under different wind speed and tidal stream velocities. The deployment of EVs can compensate power fluctuations and regulate the frequency deviations in the grid based on the proposed PID controller. In this paper, the integral minimization of time-weighted absolute error (ITAE) is used for on-line tuning of the PID controller parameters. Using Matlab/Simulink package, the smart grid is modeled and simulated using the weather data of Kuwait and then the grid performance is assessed under system disturbances and load excursions.
A First Approach on the Impact of Distributed Generation and network topology on Studies of Voltage Sags
Authors: A. C. L. Ramos  , A. J. Batista  , R. C. Leborgne  , W. P. Calixto
Published: April 2018

An analysis of the distributed generation (DG) and network topology impact on studies of voltage sags caused by system faults is presented. The simulation of 62 case studies of phase-to-ground faults on 13.8, 69, 138 and 230 kV transmission lines were performed and the voltage of a 380 V sensitive industrial busbar client was monitored. These lines are part of the electrical system of the city of Goiania, Brazil. For each case study, different fault positions were simulated by considering different DG levels connected to the consumer busbar. Long-term simulation scenarios were obtained by the Monte Carlo method and analyzed based on their cumulative distribution functions and probability density curves of voltage sags. This is one major contribution of this work.
Smart Datacenter Electrical Load Model for Renewable Sources Management
Authors: Stephane Caux  , Gustavo Rostirolla  , Patricia Stolf
Published: April 2018

Abstract. Nowadays, datacenters are one of the most con-suming devices due to the increase in cloud, web-services andhigh performance computing demands all over the world. To beclean and without connection to the grid, datacenters projectstempt to feed electricity with renewable energy sources andstorage elements. This power production needs an energymanagement providing power envelopes as a constraint to thedatacenter management system. This paper presents an opti-mization module that optimizes the IT load under renewableenergy constraints and outputs the power consumed by thecomputing resources of a datacenter. We are able to obtain areduction of up to 73% in the tasks violations while respectinga given power envelope.
Energy Optimization from raw materials and evaluate hemicelluloses. García.M.T*. García, J.C., Loaiza, J.M., Blanco, J., López, F.
Authors: García.M.T  , García, J.C.  , Loaiza, J.M  , J., López, F
Published: April 2018

The aim of this study was to optimize the energetic use and extraction of hemicelluloses by hydrolysis with dilute acid of three different lignocellulosics materials from rapid growth biomass using a factorial experimental design and multiple regression models. For that, calorific power value and chemical composition of solid phases after acid hydrolysis of three different lignocellulosic materials were determined (Chamaecytisus proliferus or tagasaste-, Leucaena leucocephala, and a dihybrid of Paulownia (fortunei and elongata). These solid phases were assessed for obtainment of energy, sugars and other by product. Superior calorific value at constant volume over dry basis and lower calorific value at constant pressure was determinated for energy purposes. The proposed acid hydrolysis process allows increased yield and xylan under more selective extraction conditions. Also higher values of superior calorifc power values that raw materials are reported. The operational ranges are especially suitable for the extraction of xylose, which was virtually quantitative at 170 ºC The selective extraction of hemicelulloses alows to have a solid part with a high content in glucan a lignin and the value of superior calorimetric is suitable for obtain energy.
Can green policies be trusted and will they lead to practical results? Evidence from the U.S. electric power sector
Authors: Ardalan Irani  , Zahra Tavassoli Hojati  , S.F.Ghaderi
Published: April 2018

From Kyoto to Paris, treaties and protocols have been devised and ratified unanimously in order to prevent the well-known phenomenon “climate change”. But has global warming been practically deferred or prevented? If so, then why should we experience warmer seasons each year or even behold water level rise due to the melting of arctic ice mountains? These are serious questions that could expose the future of green energies and green policies to jeopardy, if not answered to scientifically. Hence, we decided to provide a proof to clarify whether the practice of green policies could lead to actual results or the enacted protocols and policies are just fantasies. As a case, the U.S. electricity sector was selected and by providing an econometric framework, the dynamics between the carbon dioxide and coal as the main culprit of global warming and total amount of exploited renewable energy in power generation was studied.
Influence of fault impedance on voltage quality in radial distribution systems with distributed synchronous generator: a sensitivity analysis
Authors: A. J. T. S. Filho  , A. O. Camargo  , E. G. Domingues
Published: April 2018

The power quality delivered to final consumers has deserved special attention on the part of the scientific community due to the increasing deterioration of voltage and current waveforms as a result of use of non-linear loads. Deployment of Distributed Generation Power is expected to have a range of effects (positive or negative) on the distribution grid. This paper presents a sensitivity analysis of voltage quality of a radial distribution system located in Guarulhos, Brazil, in a presence of a distributed synchronous generator in one of its bars. The sensitive analysis is done by varying the resistive fault impedance by considering the occurrence of different types of faults due to atmospheric discharging. The system is modelled and simulated in time domain through ATP software. It was verified that the impacts caused by the symmetrical and asymmetric faults on voltage levels are attenuated as the resistive fault impedance increases.
PEMANFAATAN SERBUK BATU PECAH UNTUK CAMPURAN PAVING BLOCK DENGAN MENGGUNAKAN VARIASI BERAT TUMBUKAN (Ditinjau Dari Kuat Tekan Dan Daya Serap Air)
Authors: Adh Goesthi Kusuma Atmaja , Deshariyanto Dwi
Published: April 2018

Sumenep memiliki sumber daya alam berupa material bangunan (batuan) cukup banyak. Pemanfaatan sumber daya alam yang ada masih belum dimanfaatkan secara maksimal. Tidak jarang pekerjaan konstruksi masih menggunakan material dari luar daerah termasuk bahan material batu pecah untuk pengaspalan jalan. Perkembangan penggunaan perkerasan jalan dewasa ini semakin banyak dilakukan, khususnya perkerasan kaku dengan menggunakan paving block, namun tidak sedikit proyek konstruksi yang menggunakan paving block masih mendatangkan dari luar daerah karena pertimbangan kualitasnya yang lebih baik. Penelitian ini bertujuan untuk mengetahui pengaruh variasi berat tumbukan pada paving block dengan penambahan serbuk batu pecah ditinjau dari kuat tekan dan penyerapan air. Metode penelitian yang digunakan adalah metode experimental dengan rancangan penelitian 4 perlakuan. Komposisi agregat yang digunakan 1Pc:4Ps dengan 30% pasir hitam dan 70% serbuk batu pecah dan tumbukan dengan variasi berat 4kg, 8kg, 12kg, dan 16kg. Jumlah sampel disetiap perlakuan sebanyak 5 buah untuk uji kuat tekan dan 3 buah untuk uji penyerapan air. Data hasil penelitian dianalisis untuk mengetahui pengaruh variasi berat tumbukan (X) terhadap kuat tekan dan penyerapan air (Y) menggunakan analisis regresi linier sederhana dengan bantuan program SPSS for windows. Hasil penelitian menunjukkan bahwa variasi berat tumbukan berpengaruh positif dan signifikan terhadap kuat tekan dan berpengaruh negatif terhadap penyarapan air, artinya semakin berat tumbukan semakin menurun penyerapan air. Hasil penelitian menunjukkan kuat tekan rata-rata maksimal sebesar 40,49 Mpa diperoleh dari berat tumbukan 16kg, berdasarkan SNI-03-0691-1996 tergolong mutu A. Penyerapan air rata-rata minimum sebesar 6,797% yang diperoleh dari berat tumbukan 16kg, berdasarkan SNI-03-0691-1996 tergolong mutu C.
IbM PEMBANGUNAN DESA WISATA MELALUI KONSEP LOCAL COMMUNITY BASED
Authors: Harun Mohammad , Diana Anita Intan Nura , Haris Rillia Aisyah
Published: April 2018

Pariwisata merupakan salah satu sektor yang diandalkan pemerintah untuk memperoleh devisa dan penghasilan non migas. Desa Semaan, Kecamatan Dasuk dan Desa Belluk Ares, Kecamatan Ambunten, Kabupaten Sumenep merupakan dua Desa yang sangat berpotensi untuk dikembangkan menjadi tempat tujuan pariwisata yang berbasi masyarakat lokal (local community based). Di Desa Semaandan Desa Belluk Ares banyak kegiatan wisata yang dapat dinikmati misalnya, menikmati indahnya pantai slopeng dan pantai tanerros, rokat tase’(petik laut), tari muang sangkal, saronen Madura, dan batu cenneng.

Beberapa permasalahan diantaranya : 1)Kurangnya kesadaran dan respon masyarakat lokal terhadap pembangunan desa wisata sebagai upaya peningkatan perekonomian masyarakat, 2) Belum adanya komunitas atau masyarakat lokal yang secara resmi membentuk kelompok sadar wisata (POKDARWIS), 3) Belum tersedianya sarana penunjang (tempat) bagi komunitas masyarakat untuk berdiskusi dan menuangkan ide-ide pembangunan desa wisata, 4) Belum banyaknya jumlah masyarakat yang memiliki pengetahuan dan kemampuan mengoperasikan komputer dan internet, 5) Kurangnya media informasi dan promosi wisata terkait keberadaan tempat-tempat wisata di Desa Semaan dan Desa Belluk Ares, Kabupaten Sumenep, 6) Kurangnya pengetahuan tentang sistem manajemen dan strategi promosi desa wisata.

Hasil kegiatan meliputi kegiatan sosialisasi pentingnya desa wisata, pembentukan pokdarwis, pendampingan penyusunan program kerja, pembuatan gazebo, serah terima gazebo, sosialisasi pengelolaan website, sosialisasi manajemen dan strategi promosi, serta serah terima Laptop. Setelah dilakukan evaluasi dan monitoring terhadap kedua desa mitra, Desa Semaan memiliki rasa tanggung jawab yang lebih tinggi untuk mengembangkan desa wisata dibandingkan dengan Desa Belluk Ares.
IbM PENANGGULANGAN SISTEM DISTRIBUSI AIR BERSIH DESA BANMALENG DAN DESA JATE KEPULAUAN GILI RAJA
Authors: Deshariyanto Dwi , Fansuri Subaidillah , Resdiana Enza
Published: April 2018

Permasalahan yang ada di Desa Banmaleng dan Desa Jate ini adalah sistem pendistribusian air bersih. Jika musim kemarau semua sumber mata air di Kepulauan Gili Raja mengalami kekeringan, sehingga suplai air bersih kerumah-rumah warga menjadi terhambat. Krisis air ini akan melumpuhkan semua aktivitas warga misalnya aktivitas pertanian, buah-buahan dan sayuran akan mengering (Hartono, 2008). Mitra IbM adalah masyarakat Dusun Sokaramme dan Dusun Beddhi Lanjang. Tujuan dari pelaksanaan program IbM adalah meningkatkan pengetahuan dan keterampilan masyarakat dalam membuat dan menciptakan sistem distribusi air bersih tanpa harus ketergantungan kepada pihak pemerintah, meningkatkan pengetahuan dan keterampilan dalam mengelola manajemen distribusi air bersih serta dapat mengurangi terjadinya krisis air bersih pada musim kemarau dengan harapan nantinya dapat berdampak pada peningkatkan perekonomian masyarakat.

Pengetahuan masyarakat tentang sistem distribusi air bersih mengalami peningkatan sebesar 46 % untuk desa Banmaleng dan 52 % untuk desa Jate. Jumlah penduduk sasaran untuk desa Jate 179 jiwa dan desa Banmaleng 92 jiwa, kecepatan aliran telah memenuhi kecepatan aliran minimum sebesar 0,3-0,6 m/s dan biaya yang harus dikeluarkan masyarakat desa Jate sebesar Rp. 9.600,- bulan/jiwa, desa Banmaleng sebesar Rp. 16.500,- bulan/jiwa. Pembangunan sistem distribusi air bersih dilakukan dengan swadaya masyarakat dan mengelolaannya dilakukan secara mandiri baik di desa Jate maupun desa Banmaleng dan masyarakat telah mempunyai sistem distribusi air bersih dan mampu mengelola distribusi air bersih secara mandiri.
Effect of inorganic salt solutions on consistency limits of kaolinite
Authors: VARANK Gamze , DEMİR Ahmet , YAZICI GÜVENÇ Senem , ÖZÇOBAN Mehmet Şükrü
Published: April 2018

This study presents the effect of different inorganic salt solutions

(KCl, BaCl2, MgCl2, KNO3, Na2SO4

and MgSO4) at different concentrations on geotechnical properties

(Atterberg Limits) of kaolinite material which can be used as impermeable

bottom liner in barrier systems. Since the use of distilled water or tap water

is far from being representative of the in-situ conditions in landfills, salt

solutions were used to investigate the leachate effect on liner materials.

Additionally, the mineralogical characterization of kaolinite was studied.  Atterberg limits, specifically the liquid

limit (LL) and plastic limit (PL) that were used for classifying the clayey

soil samples according to the Unified Soil Classification System were

determined whereas mineralogical studies performed included XRD, BET and FT-IR

analyses. Results indicated that all salt solutions have a considerable effect

on the consistency limits of kaolinite. The liquid limit values of kaolinite

decreased with increasing chemical concentration whereas plastic limit values

increased. It is observed that the effects of the divalent and trivalent

cations on kaolinite were more apparent than those of monovalent cations. As a

result chemical solutions decrease liquid limit values of high plasticity

kaolinite materials,  tend to reduce the

thickness of the DDL and flocculate the kaolinite particles, resulting in

reduction of swelling and increasing of hydraulic conductivity.
JUSTIÇA SOCIAL NA ORDEM ECONÔMICA BRASILEIRA E A BUSCA PELA EFETIVAÇÃO DO ESTADO DEMOCRÁTICO
Authors: Beijato Junior Roberto , Trevisam Elisaide
Published: April 2018

O Brasil, cuja Constituição da República tem como fundamento a dignidade da pessoa humana, tem por dever promover os valores sociais para e efetivação da democracia como forma de justiça. O objetivo dessa reflexão é demonstrar que, diante da ordem econômica, deve estar assegurado os valores supremos de toda a sociedade. Isso implica em um Estado que busca trazer políticas públicas asseguradoras que efetivem a vivência de uma cidadania justa e igualitária. Para alcançar um melhor resultado da reflexão, por meio da pesquisa bibliográfica, esse trabalho utilizou-se do método hipotético-dedutivo.
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Authors:   -
Published: April 2018

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