bluuebunny/crossref_metadata_2025_split huggingface dataset:
The research of polishing nozzle quality based on discrete element method
Authors: Li Junye , Hu Jinglei , Zhang Xinming , Zhao Weihong 
Published: March 2017

In order to get further study for the effect of abrasive grains to the wall of the workpiece during polishing process, a new method of discrete element that carry out the numerical simulation with DEM is put forward, and the visual calculation is performed for the abrasive grain movement in the nozzle. The interaction of particles-particles or particles-workpiece wall during the polishing process and the tracks of single grain in the workpiece are analyzed by observing the distribution of abrasive grain in the workpiece at different time. The surface removal mechanism of abrasive grains to the workpiece material is discussed by analyzing the collision process of particles to the workpiece wall. The wear level of the abrasive grains to the inner surface of the workpiece is studied through the force of abrasive grain to the workpiece wall consumption, and finally explore the cutting effect of particles to workpiece wall. As a consequence, the abrasive flow processing experiment is carried out. The surface roughness of the large hole and small hole of the nozzle are detected by stylus measurement. The conclusion shows that the surface roughness for the large hole and the small hole before the experiment is1.741 μm and 1.201 μm, its 0.801 μm, 0.651 μm after it. Further roughness tests are performed on the surface of the pores by means of a grating surface measuring instrument. The result indicates that the surface roughness reduces from 2.67 μm to 0.697 μm, 0.728 μm, 0.782 μm. Apparently, the surface roughness of the hole is sharply reduced, which has a smooth and flat inner surface, the effectiveness and reliability of the abrasive flow are verified.
APPLICATON OF MYCORRIZA ON PLANTING MEDIA OF TWO TOMATO VARIETIES TO INCREASEVEGETABLE PRODUCTIVITY IN DROUGHT CONDITION
Authors: Kuswandi Paramita Cahyaningrum , Sugiyarto Lili 
Published: March 2017

A method used for the development of dry areas/marginal lands is the improvement of soil structure and addition to the media to support the growth and development of crops. Tomatoes have the potential to be developed in marginal lands due to its high nutrition, high in demand and easy to be cultivated. One of the method used to improve planting media is the addition of microorganism such as mycorrhiza which can help the absorbtion of water and nutrition for plants. The interval of irrigation is used as a simulation of drought. This research aim was to observe the effect of mycorrhiza in the soil on the growth and development of tomato with several treatments of irrigation. The method used was the addition of 4 g of mycorrhiza per polybag (size 30x30 cm2), using Complete Randomized Design. There were 6 combinations of treatments. The treatments were : 3 interval of irrigation (every day, every 7 days and every 14 days), and 2 treatments of mycorrhiza (0 g and 4 g). There were 3 repetition for each combination of treatments. The results showed that the addition of mycorrhiza can increase significantly plant fresh and dry weight and also root length. The difference in plant height, number of branches, number of leaves, plant growth rate and percentage of infection were caused by the difference in irrigation interval. The difference in the varieties used also contribute to a difference in the percentage of infection. Further research must be made on the effect of mycorrhiza with addition of inorganic fertilizer to increase the growth and development of tomato plants in water stressed condition. Keywords: mycorriza, tomato, draught simulation
VISCOSITY TEST OF VEHICLE ENGINE OILS
Authors: Prasetyowati Rita 
Published: March 2017

This study aims to determine the value of the kinematic viscosity lubricants motorcycle that has been used at various temperatures and the use of distance. This study also aims to remedy mengtahui how the value of the kinematic viscosity of the lubricant car that has been used in a wide range of temperature variation and distance usage. Viscosity liquid, in this case is the lubricants, can be determined using the Redwood viscometer By using Redwood viscometer, can be measured flow time required by 50 ml of the sample at a constant temperature. Time measurement result is known as the Redwood's sec or conventional viscosity. Conventional viscosity can be determined from the kinematic viscosity values. For motorcycle lubricant viscosity measured at a temperature of 30ͦ C, 50ͦ C, 65ͦ C and 100ͦ C, with the use of distance variation 0 Km, 5 Km, 10 Km, 15 Km and 20 Km. For car lubricant viscosity measured at a temperature of 30ͦ C, 50ͦ C, 65ͦ C and 100ͦ C, with variations in the use of distance 0 km, 1000 km, 5000 km, and 10000 Km. Motorcycle lubricant viscosity values at a temperature of 100ͦ C is 9.54 m2 / s (new lubricant), 1.15 m2 / s (use 5 Km), 5.86 m2 / s (use of 10 Km), 8.02 m2 / s (use of 15 Km), and 9.11 m2 / s (use of 20 Km). Lubricant viscosity values at a temperature of 1000C car is 6.73 m 2 / s (new lubricant), 7.89 m2 / s (use 1,000 km), 6.0 m2 / s (use 5000 Km), and 7.55 m2 / s (use 10000 Km). Keywords: viscosity, oil, temperature
FACTORS INFLUENCING JOB FATIGUE AND STRESS AMONG EMPLOYEES OF YOGYAKARTA STATE UNIVERSITY ION COLUMN TECHNIC WITH LOCAL ZEOLITE AND ACTIVE CARBON
Authors: Mariyam Siti , Pertiwi Kartika Ratna 
Published: March 2017

Stress and fatigue related to workplace may interrupt with the effectivity and productivity workers, including the employees who work in the office. This research aims to determine the level of stress and fatigue related to workplace and to describe determinant factors invloved in job stress and musculosceletal fatigue. It is designed as an analytical survey, designed as cross sectional approach. Population were the employees of Yogyakarta State University, samples were taken with purposive sampling technique. The respondents were they who fulfilled the inclusion criteria. Job stress and fatigue were taken with observation and structured intervie, using adapted instrument from Berutu Soetopo (2010) and Andininsari (2009). Musculosceletal fatigue were measured with nordic body map method. Other paramater included anthropometry and ergonometry measurement and individual characteristics. The finding shows that most respondents (95%) suffered mild job stress and more than half of respondents (73%) had mild musculosceletal fatigue. About 60% of workplace facilities were not suitable according to ergonomic requirement. Determinant factors for job stress such as age, employment status and workplace ergonometry, while determinant factors for musculosceletal fatigue includes age body mass index and also ergonometry. Keywords: workplace, stress, fatigue, musculosceletal
OPTIMIZATION OF CONDITION ION Cu2+ ELECTRODEPOSITION IN ELECTROPLATING LIQUID WASTE WITH FORMALDEHYDE AS REDUCING AGENT
Authors: Marwati Siti , Padmaningrum Regina Tutik 
Published: March 2017

Abstract The aims of this research to determine of the optimum of formaldehyde concentration, teh optimum of electrodeposition time and the optimum pH of solution. In addition, this research also aims to determine the character Cu deposite at optimum operational. The sample in this research was used real electroplating liquid waste from Kotagede Yogyakarta.done at various formaldehyde concentration Electrodeposition was done at various formaldehyde concentration, electrodeposition time and varoius of pH. The optimum conditions could be seen the maximum efficiency. It could be obtained by measuring the final concentration of Cu2+ after electrodeposition process by Atomic absorption spectrophotometry. The character of deposit could be seen by visual and X-ray Diffraction. The result of this research showed that the optimum of formaldehyde concentration as reducing agent was 0.3 M. the optimum time was 4 hours and the optimum of pH 9. The character of deposte was contained Cu deposite and more subtle than deposite which electrodeposited without formaldehyde. Keywords: electrodeposition, formaldehyde, reducing agent
“Maybe They Don't Even Know That I Exist”: Challenges Faced by Family Members and Friends of Patients with Advanced Kidney Disease
Authors: O’Hare Ann M. , Szarka Jackie , McFarland Lynne V. , Vig Elizabeth K. , Sudore Rebecca L. , Crowley Susan , Reinke Lynn F. , Trivedi Ranak , Taylor Janelle S. 
Published: March 2017

Background and objectives
Family members and friends of patients with advanced chronic illness are increasingly called on to assist with ever more complex medical care and treatment decisions arising late in the course of illness. Our goal was to learn about the experiences of family members and friends of patients with advanced kidney disease.

Design, setting, participants, & measurements
As part of a study intended to identify opportunities to enhance advance care planning, we conducted semistructured interviews at the Veterans Affairs Puget Sound Health Care System with 17 family members and friends of patients with advanced kidney disease. Interviews were conducted between April of 2014 and May of 2016 and were audiotaped, transcribed, and analyzed inductively using grounded theory to identify emergent themes.

Results
The following three themes emerged from interviews with patients’ family members and friends: (1) their roles in care and planning were fluid over the course of the patient’s illness, shaped by the patients’ changing needs and their readiness to involve those close to them; (2) their involvement in patients’ care was strongly shaped by health care system needs. Family and friends described filling gaps left by the health care system and how their involvement in care and decision-making was at times constrained and at other times expected by providers, depending on system needs; and (3) they described multiple sources of tension and conflict in their interactions with patients and the health care system, including instances of being pitted against the patient.

Conclusions
Interviews with family members and friends of patients with advanced kidney disease provide a window on the complex dynamics shaping their engagement in patients’ care, and highlight the potential value of offering opportunities for engagement throughout the course of illness.
ANALISA PEMILIHAN KUALITAS ANDROID JELLY BEAN DENGAN MENGGUNAKAN METODE AHP PENDEKATAN MCDM
Authors: Gustina Dian , Siahaan Rendi Haposan 
Published: March 2017

Android merupakan sistem operasi pada telepon seluler yang terus mengalami perkembangan. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh variable Processor, RAM dan Kamera terhadap kualitas android dalam melakukan pemilihan android. Penelitian ini dilatarbelakangi oleh banyaknya bermunculan vendor smartphone yang mengusung handphone pintar, setelah system operasi android mulai dikenal oleh masyarakat. Sehingga yang menjadi obyek penelitian adalah para pengguna Smartphone Android. Teknik pengumpulan data pada penelitian ini dilakukan dengan kuisioner. Sedangkan alat analisis data pada penelitian ini dilakukan dengan menggunakan metode Analycital Hierarchy Process (AHP) pendekatan Multi Criteria Decision Making (MCDM). Dari penelitian yang telah dilakukan didapat hasil bahwa variable Processor, RAM dan Kamera memiliki pengaruh yang signifikan terhadap pemilihan kualitas android.
MENINGKATKAN HASIL BELAJAR SISWA DENGAN MENGGUNAKAN MODEL PEMBELAJARAN PROBLEM SOLVING BERBASIS EKSPERIMEN DALAM PEMBELAJARAN FISIKA
Authors: . Suherman 
Published: March 2017

The objective in this study to improve students learning outcomes by using learning model problem solving based experiments in learningphysics. The subjects were students of class XI IA-1 SMAN 1 Stabat totaling 38 people, consisting of 10 men and 28 women. Student learning outcomes inthe cognitive domain in the first cycle the average values posttest obtained 72.95 with N-gain of 37% including the category, the second cycle increasedto 77.30 with N-gain of 43% including the medium category. The number ofstudents who pass the study increased from 63.16% to 86.84% first cycle tothe second cycle. Student learning outcomes in the psychomotor domain ofthe first cycle obtained an average value of 72.11 including sufficient criteriaand the second cycle becomes 77.54 including both criteria. Classicalcompleteness in the first cycle of 52.63% and the second cycle becomes 89.47%. Student learning outcomes in the affective domain, the averagevalues obtained 64.47 including sufficient criterion in the first cycle and thesecond cycle becomes 75.09 including both criteria. Completeness in the firstcycle of 44.74% and the second cycle becomes 94.74%. Conclusion: there isan increase in student learning outcomes in the cognitive, psychomotordomain and affective domain by using learning problem solving basedexperiment.
EFEK MODEL PEMBELAJARAN PROBLEM SOLVING DAN MOTIVASI TERHADAP HASIL BELAJAR FISIKA SISWA SMA
Authors: Hutabarat Grace Dennys , , Sahyar 
Published: March 2017

The Objectives of this research are (1) find out the difference oflearning outcomes Physic by Problem solving and Expository (2) differenceof students the learning outcomes with high learning motivation comparedlow learning motivation, (3) interaction between motivation and learningoutcomes of Problem solving and Expository. This study is a quasiexperimentresearchwith2x2factorialdesigns.Thepopulationin this studyis 320 students from eight classes of grade X at SMA N 1 Sidamanik, NorthSumatra. The samples of this research were two classes, consisted of 75students determined by random cluster sampling. Data were analyzed usingtwo ways ANAVA at significant level of 0.05. Research shows that (1)students learning outcomes of problem solving class is better then expositoryclass. (2) students learning outcomes with high learning motivation is better then low learning motivation (3) interaction of motivation and learningoutcomes is available in the problem solving and expository.
THE EFFECTS OF INQUIRY LEARNING MODEL TRAINING AND CRITICAL THINKING TOWARDS SMA STUDENT LEARNING OUTCOMES
Authors: Saura Ella Lady , Turnip Betty M. 
Published: March 2017

The purposes of the research are: (1) To determine differences in learning outcomes of students with Inquiry Training models and Direct Instruction teaching models, (2) to determine differences in physics learning outcomes of students who have high critical thinking and low critical thinking, (3) to determine the interaction between learning models with the level of critical thinking in improving student Physics learning outcomes. The sample in this study conducted in a cluster random sampling of two classes, where the first class as a class experiment applied Inquiry Training models as a class and the second class of controls implemented Direct Instruction models. The instrument is used in this study is physics learning outcomes tests in narrative form as many as 7 questions and critical thinking test in narrative form as 7 questions that have been declared valid and reliable. The results were found: (1) there are differences in physical students learning outcomes are taught by Inquiry Training models and Direct Instruction teaching models. Learning outcomes of students who are taught by Inquiry Learning Model Training better than student learning outcomes are taught with Direct Instruction Model Learning. (2) There is a difference in student's learning outcomes that have high critical thinking and low critical thinking. Student learning outcomes that have a high critical thinking better than student learning outcomes that have a low critical thinking. (3) There is interaction between learning and mastery of material Model Physics prerequisite to student learning outcomes. Learning outcomes of students who are taught by the model is influenced also by the Inquiry Training critical thinking, while learning outcomes of students who are taught with Direct Instruction models are not affected by the students' critical thinking.
EFEK MODEL PEMBELAJARAN INQUIRY TRAINING BERBASIS MULTIMEDIA LECTORA DAN KEMAMPUAN BERPIKIR FORMAL TERHADAP HASIL BELAJAR FISIKA SISWA
Authors: Hidayat Muhammad Iman , Harahap Mara Bangun 
Published: March 2017

Penelitian ini bertujuan: (1) untuk menjelaskan hasil belajar siswayang diterapkan model pembelajaran inquiry training berbasis multimedialectora lebih baik dibandingkan dengan model pembelajaran konvensional,(2) untuk menjelaskan hasil belajar siswa yang memiliki kemampuanberpikir formal tinggi adalah lebih baik dari siswa yang memilikikemampuan berpikir formal rendah, (3) untuk menjelaskan hubungan antaramodel pembelajaran inquiry training berbasis multimedia lectora dankemampuan berpikir formal terhadap hasil belajar fisika siswa. Sampel diambil dengan menggunakan cluster random sampling dimana kelas pertama sebagai kelas eksperimen diterapkan model pembelajaran inquirytraining berbasis multimedia lectora dan kelas kedua sebagai kelas kontrolditerapkan model pembelajaran konvensional. Instrumen yang digunakandalam penelitian ini adalah instrumen kemampuan berpikir formal terdiridari 10 pertanyaan dan instrumen hasil belajar fisika terdiri dari 20pertanyaan yang dinyatakan valid dan reliabel. Hasil penelitianmenunjukkanbahwa: (1) hasil belajar siswa yang diterapkan model pembelajaran inquirytraining berbasis multimedia lectora lebih baik dibandingkan modelpembelajaran konvensional; (2) hasil belajar siswa yang memilikikemampuan berpikir formal tinggi lebih baik dibandingkan siswa yangmemiliki kemampuan berpikir formal rendah; (3) terdapat interaksi antaramodel pembelajaran inquiry training berbasis multimedia lectora dankemampuan berpikir formal terhadap hasil belajar fisika siswa.Kata kunci: inquiry training, berpikir formal, hasil belajar siswa
ANALISIS PENGARUH MODEL PEMBELAJARAN BERBASIS MASALAH DENGAN MENGGUNAKAN MEDIA FLASH DAN SIKAP ILMIAH TERHADAP KEMAMPUAN BERPIKIR TINGKAT TINGGI FISIKA SISWA SMA
Authors: Peranginangin Despaleri , . Sahyar 
Published: March 2017

Penelitian ini bertujuan untuk menganalisis (1) perbedaankemampuan berpikir tingkat tinggi fisika siswa pada model pembelajaranberbasis masalah dengan menggunakan media flash dan pembelajarankonvensional, (2) perbedaan kemampuan berpikir tingkat tinggi siswa yangmemiliki sikap ilmiah di atas rata-rata dan di bawah rata-rata, serta (3)interaksi antara model pembelajaran dengan tingkat sikap ilmiah dalam mempengaruhi kemampuan berpikir tingkat tinggi siswa. Penelitian ini merupakan penelitian quasi eksperimen. Pemilihan sampel dilakukandengan teknik cluster random sampling sebanyak dua kelas, dimana kelaspertama diajarkan dengan model pembelajaran berbasis masalah denganmenggunakan media flash dan kelas kedua dengan pembelajarankonvensional. Instrumen yang digunakan terdiri dari tes kemampuan berpikir tingkat tinggi dan angket sikap ilmiah. Data dalam penelitian ini dianalisisdengan menggunakan anova dua jalur. Hasil penelitian menunjukkan bahwakemampuan berpikir tingkat tinggi fisika menggunakan model pembelajaranberbasis masalah dengan menggunakan media flash lebih baik dibandingkandengan pembelajaran konvensional, kemampuan berpikir tingkat tinggisiswa dengan sikap ilmiah di atas rata-rata lebih baik dibandingkan dengansiswa yang sikap ilmiah di bawah rata-rata, serta terdapat interaksi antaramodel pembelajaran berbasis masalah dengan menggunakan media flashdan sikap ilmiah dalam mempengaruhi kemampuan berpikir tingkat tinggi siswa. Kata kunci: model pembelajaran berbasis masalah, media flash, sikap ilmiah, kemampuan berpikir tingkat tinggi
PENGEMBANGAN BAHAN AJAR FISIKA SMA BERBASIS INVESTIGASI PADA MATERI FLUIDA DINAMIS UNTUK MENINGKATKAN HASIL BELAJAR SISWA
Authors: Maulida Rizki , Simanjuntak Mariati Purnama 
Published: March 2017

Penelitian ini bertujuan untuk menganalisis apakah bahan ajaryang dikembangkan dapat meningkatkan respon, aktivitas dan hasil belajarsiswa dengan menggunakan pengembangan bahan ajar SMA berbasisinvestigasi pada materi fluida dinamis berbasis investigasi. Metode yangdilakukan dalam penelitian ini menggunakan penelitian pengembanganResearch and Development (R&D). Sampel penelitian ini adalah satu kelasyaitu kelas XI IPA2. Instrumen yang digunakan untuk mengumulkan data ada tiga yaitu dengan menggunakan lembar validasi bahan ajar berupa angket dan kemudian di validkan oleh tim ahli, untuk menilai respon siswapada bahan ajar instrumen yang digunakan berupa angket yang dibagikanpada setiap pertemuan dan untuk melihat aktivitas siswa menggunakanangket yang dinilai oleh teman sejawat peneliti dalam mengukur aktivitassiswa pada setiap pertemuan serta untuk melihat hasil belajar siswadigunakan penilaian evaluasi berupa 10 pertanyaan dalam bentuk pilihanberganda yang diberikan pada setiap akhir pertemuan. Hasil penelitiandiperoleh: Bahan ajar fisika SMA berbasis investigasi yang dikembangkandapat meningkatakan respon, aktivitas dan hasil belajar siswa padapertemuan I, II, III yaitu: respon rata-rata pada pertemuan pertama sebesar76,42. pada pertemuan kedua sebesar 79,77 dan pada pertemuan ketiga87,36. Aktivitas rata-rata pada pertemuan pertama sebesar 67,01. padapertemuan kedua sebesar 71,00 dan pada pertemuan ketiga 79,00. Hasilbelajar rata-rata pada pertemuan pertama sebesar 40,36. pada pertemuankedua sebesar 60,71 dan pada pertemuan ketiga 81,07.Kata kunci: hahan ajar, investigasi, hasil belajar
Prótesis electrónicas: Una nueva esperanza para mejorar la calidad de vida de las personas
Authors: Díaz Montealegre Leidy Catherine 
Published: March 2017

El presente artículo tiene como fin mostrar cómo las prótesis de miembros inferiores y superiores se convirtieron en una posibilidad de mejorar la calidad de vida de la población con capacidad diferente, brindando productos con grandes avances tecnológicos y teniendo encuenta la extracción de patrones para la creación de cada prótesis con las características propias que definen a una persona. Teniendo en cuenta lo anterior, para mejorar esacalidad de vida se hablará de: ¿cómo las prótesis deben verse en sus cuerpos para que se sientan nuevamente incorporados en la sociedad y activos en sus funciones cotidianas?. Finalmente, el autor muestra cómo realizan experimentación en ciencias como la bioingeniería,mecánica, electrónica, robótica y electromecánica con nuevos diseños y creaciones de prótesis electrónicas que poco a poco perfeccionan con base en investigaciones alternas, criterios científicos y las observaciones de cada una de las personas que las utilizarán diariamente.
PENGARUH VARIASI MEDIA QUENCHING TERHADAP SIFAT MEKANIS RANTAI ELEVATOR FRUIT KELAPA SAWIT
Authors: Luthfianto Saufik , Suprayogi Zulfiqar Andhika , Samyono Drajat 
Published: March 2017

Tujuan yang ingin dicapai dalam penelitian ini adalah mengetahui pengaruh proses heat treatment dengan media pendingin air+garam terhadap sifat mekanis rantai elevator,Â mengetahui pengaruh proses heat treatment dengan media pendingin oli 20w â€“ 50w terhadap sifat mekanis rantai elevator, mengetahui pengaruh proses heat treatment dengan media pendingin air laut terhadap sifat mekanis rantai elevator. Metode yang digunakan dalam penelitian ini adalah metode eksperimen murni. Berdasarkan hasil penelitian diketahui Hasil uji one way ANOVA yang telah dilakukan mengindikasikan bawa Fhitung uji kuat tarik sebesar 2,046, yang lebih kecil daripada Ftabel (2,6) sebesar 5,14 (Fhitung< Ftabel), artinya uji kuat tarik pada ketiga jenis media tidak signifikan berbeda atau terdapat kesamaan kuat tarik yang signifikan diantara ketiga jenis penggunaan media. Hasil uji one way ANOVA yang telah dilakukan mengindikasikan bawa Fhitung uji kekerasan (Quenching) sebesar 16,471, yang lebih besar daripada Ftabel (2,24) sebesar 3,40 (Fhitung> Ftabel), artinya uji kekerasan (Quenching) pada ketiga jenis media signifikan berbeda atau terdapat perbedaan kekerasan yang signifikan diantara ketiga jenis penggunaan media