bluuebunny/crossref_metadata_2025_split huggingface dataset:
MAGNETICALLY INDUCED PIEZOELECTRIC ENERGY HARVESTER VIA HYBRID KINETIC MOTION
Authors: Azam Huda , Mohamad Hanif Noor Hazrin Hany , Md Ralib Aliza Aini 
Published: June 2019

ABSTRACT: Piezoelectric energy harvesting is a possible breakthrough to reduce the global issue of electronic waste as they can efficiently convert the ambient vibration to the electrical energy without any additional power. This work presents the design and development of a piezoelectric energy harvester that is capable of transforming vibration from ambient sources into electricity. It focuses on a magnetically plucked piezoelectric beam as an alternative to the mechanically induced harvesters, as the latter are subjected to wear and tear. A prototype comprising of a 40 mm PZT-5H piezoelectric beam with a permanent magnet mounted at one end of the beam, as well as a series of permanent magnets of same types attached on an eccentric rotor was developed along with a National Instruments® data acquisition device. Mean output voltages of 2.98 V, 1.76 V and 0.34 V were recorded when the eccentric rotors were slowly rotated at 8.4 rad/s with increasing distances of 5 mm, 7.5 mm and 10 mm respectively, between the magnets on the rotor and the beam. These results have proven that voltage could also be generated by magnetically plucking the piezoelectric beam, and by reducing the distance between magnets, the amount of voltage generated will be higher. The outcome of this work signifies the possibility for implementation of energy harvesters that are capable of powering electronic devices from hybrid kinetic motion, with a reduced risk of equipment fatigue.
ABSTRAK: Penjanaan tenaga melalui piezoelektrik adalah satu penemuan terbesar dalam mengurangkan isu global pengurusan sisa elektronik. Ini kerana ia berupaya mengubah getaran persekitaran kepada tenaga elektrik tanpa sebarang tambahan tenaga. Kajian ini berkenaan reka bentuk dan pembangunan penjana tenaga piezoelektrik yang mampu mengubah getaran persekitaran kepada elektrik. Fokus kajian adalah pada penjanaan tenaga secara magnetik dari bilah piezoelektrik sebagai alternatif kepada penjanaan mekanikal, kerana penjanaan tenaga secara mekanikal berisiko tinggi kepada kerosakan alat dalam jangkamasa panjang. Prototaip piezoelektrik PZT-5H yang berukuran 40 mm ini telah dilengkapi magnet kekal pada hujung bilah, serta satu siri magnet kekal jenis sama turut dipasang pada pemutar eksentrik bersama peranti pengambilan data National Instruments®. Secara purata, sebanyak 2.98 V, 1.76 V dan 0.34 V voltan output telah direkodkan ketika pemutar eksentrik berputar perlahan pada 8.4 rad/s dengan jarak tambahan antara magnet pemutar dan bilah piezoelektrik bersamaan 5 mm, 7.5 mm dan 10 mm, masing-masing. Keputusan menunjukkan tenaga dapat dihasilkan dengan cara pemacuan piezoelektrik secara magnetik, dan tenaga yang terhasil akan bertambah dengan pengurangan jarak antara magnet. Hasil kerja menunjukkan tenaga dapat dihasilkan daripada gerakan kinetik hibrid, dengan risiko rendah pada kerosakan alat.
Evaluation on the Effectiveness of Visual Learning Environment on Programming Course From Students’ Perspectives
Authors: Dina Nasa Zata , Wuryanto Eto , Marjianto Rachman Sinatriya 
Published: June 2019

ABSTRACT: This paper discusses the effectiveness of visual learning environment which is used to help students in university to study programming course. The visual learning environment which is used in this study is Greenfoot and Alice. The main goal of this article is to obtain the correlation between students‘ satisfaction level and their grades in studying programming course using visual learning environment tools. The participants were conducted on 110 students who took programming course during their first year. A survey was sent to students about their satisfaction level in learning programming course. Two-variable correlation analysis, significance test and descriptive analysis were conducted to find out the relationship between students' learning satisfaction level and their grades in programming course. This study discusses the student perspectives that are summarized in ten questions. There is a significant correlation between independent and dependent variables. The ? value is 2.09 which proves that the independent variable in the form of student's learning satisfaction level is useful to obtain better assessment of their grades. Based on their perspectives, it is found that visual learning environment tools have more significant influence in improving the students‘ grade than traditional learning method. Further research is needed to find out other impact factors.
ABSTRAK: Makalah ini membincangkan keberkesanan persekitaran pembelajaran visual yang digunakan untuk membantu pelajar di universiti untuk mempelajari kursus pengaturcaraan. Persekitaran pembelajaran visual yang digunakan dalam kajian ini ialah Greenfoot dan Alice. Matlamat utama artikel ini adalah untuk mendapatkan korelasi antara tahap kepuasan pelajar dan gred mereka dalam mengkaji kursus pengaturcaraan menggunakan alat-alat persekitaran pembelajaran visual. Para peserta telah diadakan pada 110 orang pelajar yang mengambil kursus pengaturcaraan pada tahun pertama mereka. Satu tinjauan telah dihantar kepada pelajar tentang tahap kepuasan mereka dalam pembelajaran kursus pengaturcaraan. Analisis korelasi dua-pembolehubah, ujian penting dan analisis deskriptif telah dijalankan untuk mengetahui hubungan antara tahap kepuasan belajar pelajar dan gred mereka dalam kursus pengaturcaraan. Kajian ini membincangkan perspektif pelajar yang diringkaskan dalam sepuluh soalan. Terdapat korelasi yang signifikan antara pembolehubah bebas dan bergantung. Nilai ? ialah 2.09 yang membuktikan bahawa pemboleh ubah bebas dalam bentuk tahap kepuasan pembelajaran pelajar adalah berguna untuk mendapatkan penilaian yang lebih baik dari gred mereka. Berdasarkan perspektif mereka, didapati alat persekitaran pembelajaran visual mempunyai pengaruh yang lebih besar dalam meningkatkan gred pelajar daripada kaedah pembelajaran tradisional. Kajian lanjut diperlukan untuk mengetahui faktor-faktor kesan yang lain.
Grease Quality Issues on Middle Voltage Switchgear: Corrosivity, Resistivity, Safety and Ageing
Authors: Mahmud Mohd Sabri , Ishak Sanuri , Razali Mohd Najib , Abdul Aziz Mohd Aizudin , Musa Musfafikri 
Published: June 2019

Grease products recommended by OEM for conventional 11kV switchgears are generally trusted. Some disadvantages might however exist among them or their supply could be insufficient and lead to use of non-OEM-recommended grease. This paper reports analysis methods to evaluate both types of grease that were recently used in the switchgears at local electrical distribution stations owned by Tenaga Nasional Berhad. Hardened, greenish and severely irritating greases probably caused by incompatible compounding, electrochemical reaction, and hazardous components, respectively, were among common problems faced by workers. Eight physical tests and four chemical tests were conducted on 10 grease samples using thermogravimetry, switchgear rig, gas chromatography and infrared spectroscopy besides other equipment and standard methods. Grease stability, oil bleeding, flammability of grease droplet and dropping point were among the characteristics determined in the analyses. The results reveal copper corrosion, chemical change, instable and inconsistent grease, and toxics in grease, which surprisingly included the OEM-recommended one.
ABSTRAK: Produk gris yang disyorkan oleh Pengeluar Peralatan Asal (OEM) bagi gear-suis konvensional 11 kV secara umumnya dipercayai ramai. Kemungkinan terdapat kekurangan pada produk-produk tersebut ataupun bekalan gris mereka yang tidak mencukupi telah mendorong kepada penggunaan gris yang tidak disyorkan oleh OEM. Kaedah analisis kajian ini melaporkan tentang kedua-dua jenis gris yang kebelakangan ini digunakan oleh Tenaga Nasional Berhad pada gear-suis di stesen pencawang elektrik. Gris mengeras, berlumut dan menjengkelkan mungkin disebabkan oleh sebatian bahan yang tidak sesuai, tindak balas elektrokimia dan komponen yang tidak selamat, masing-masing adalah antara masalah yang dihadapi oleh para pekerja. Lapan ujian fizikal dan empat ujian kimia telah dijalankan pada 10 sampel gris menggunakan termogravimetri, pemakai gear-suis, kromatografi gas dan spektroskopi inframerah selain alatan lain dan kaedah-kaedah piawai. Antara ciri-ciri yang dikaji dalam analisis ini adalah kestabilan gris, sifat lelehan minyak, sifat mudah terbakar titisan gris dan takat rendah gris. Hasil kajian mendapati gris ini menyebabkan tembaga terhakis, sifat kimia berubah, sifat gris yang tidak stabil dan mudah berubah, dan juga beracun memberi kejutan kerana pihak OEM tetap mengesyorkan gris jenis ini.
Analisis Kemampuan Pemecahan Masalah dan Respon Peralihan Matematik dari SMP ke SMA pada Materi SPLTV
Authors: Zakiyah Siti , Hidayat Wahyu , Setiawan Wahyu 
Published: June 2019

AbstrakPemecahan masalah merupakan suatu kemampuan yang sangat kompleks di mata siswa. Tujuan dari penelitian ini untuk mengetahui dan menganalisis kemampuan pemecahan masalah matematik siswa SMA kelas X dan respon peralihan matematika SMP ke SMA terhadap materi SPLTV. Penelitian ini berbentuk deskriptif kualitatif dengan objek penelitian siswa kelas X di salah satu SMA di Bandung Barat. Instrumen dalam penelitian ini adalah uji soal kemampuan pemecahan masalah dan angket kemampuan matematika siswa apabila ditinjau dari peralihan SMP ke SMA terhadap materi SPLTV. Jumlah soal yang digunakan dalam penelitian ini adalah sebanyak empat dari enam butir soal yang disediakan dengan angket yang berisikan sepuluh pertanyaan, yang terdiri dari empat pertanyaan tertutup dan enam pertanyaan terbuka. Penelitian ini dilaksanakan pada tanggal 10 September 2018 dan 8 Oktober 2018. Kemampuan pemecahan masalah matematik siswa kelas X di Bandung Barat terhadap materi SPLTV tergolong tinggi, dengan persentase sebesar 79,868%. Siswa yang memiliki latar belakang pemahaman SPLDV yang baik cenderung mudah memahami SPLTV dengan baik pula. Analysis of Problem Solving Ability and Respons of Transition from Junior to Senior High School in SPLTV MaterialAbstractProblem-solving is problem-solving in the eyes of students. The purpose of this study was to study and analyze the mathematical problem solving of high school students in class X and the response of the transition of junior high school to high school to SPLTV material. This research is in the form of qualitative descriptive research with class X objects in one of the high schools in West Bandung. The instruments in this study were problem-solving questions and mathematical ability questionnaires which were reviewed from the transition of junior high school to high school to SPLTV material. The number of questions used in this study amounted to four of the six items provided with a questionnaire containing questions, which consisted of four closed questions and six open questions. This research was conducted on September 10, 2018, and October 8, 2018. The ability to solve the problems of grade X students in West Bandung on SPLTV material was high, with a contribution of 79.868%. Students who have a background in understanding SPLDV can easily consider SPLTV well too.
Kemampuan Berpikir Relasional Abstrak Calon Guru Matematika dalam Menyelesaikan Soal-Soal Non-Rutin pada Topik Geometri Non-Euclid
Authors: Sundawan Mohammad Dadan , Irmawan Wawan , Sulaiman Herri 
Published: June 2019

AbstrakBagi calon guru matematika, kemampuan berpikir relasional abstrak sangat mutlak diperlukan untuk menunjang kompetensinya sebagai calon guru yang profesional di masa mendatang, sehingga untuk mengetahuinya dapat dilakukan uji dengan memberikan soal-soal non-rutin geometri non Euclid. Penelitian ini bertujuan untuk mengetahui dan mendeteksi kemampuan berpikir relasional abstrak calon guru matematika dalam menyelesaikan soal-soal non-rutin. Metode kualitatif digunakan pada penelitian ini. Subjeknya ialah tiga orang mahasiswa tingkat akhir di Keguruan Universitas Swadaya Gunung Jati (UGJ) yang dipilih berdasarkan hasil dari nilai kemampuan akademik tinggi. Teknik untuk menganalisis suatu data dilakukan dengan cara mereduksi data terlebih dahulu, kemudian data disajikan, selanjutnya ditarik sebuah kesimpulan, dan tahap akhir yaitu dapat diverifikasi hasil penelitian tersebut. Penelitian ini dapat mengetahui bahwa subjek telah memenuhi kemampuan berpikir relasional abstrak dengan fungsi kognitifnya. Sehingga secara umum dapat disimpulkan bahwa kemampuan berpikir relasional abstrak bagi calon guru matematika program studi pendidikan matematika Universitas Swadaya Gunung Jati sudah beberapa yang memiliki dan terdeteksi sesuai dengan fungsi kognitif yang ada. Relational Abstract Thinking Ability of Prospective Mathematics Teacher Solved Non-Routine Problems on Non-Euclid Geometry Topic AbstractFor prospective mathematics teachers, abstract relational thinking skills are necessary to support their competencies as future professional teachers, so that they can be tested by giving non-Euclid geometry non-routine questions. This study aims to determine and detect the ability of relational thinking abstract of prospective mathematics teachers in solving non-routine questions. Qualitative methods are used in this study. The subjects were three final-level students at the Swadaya Gunung Jati University Teacher Training (UGJ) who were selected based on the results of high academic ability scores. The technique for analyzing a data is done by reducing the data first, then the data is presented, then a conclusion is drawn, and the final step is to verify the results of the research. This research can find out that the subject has fulfilled the ability of abstract relational thinking with cognitive functions. So, in general, it can be concluded that abstract relational thinking skills for prospective mathematics teachers of the mathematics education program at Swadaya Gunung Jati University have some that have and are detected according to existing cognitive functions.
Penalaran Statistis Siswa dalam Menyelesaikan Masalah Case Study
Authors: Febrilia Baiq Rika Ayu 
Published: June 2019

AbstrakPenalaran siswa secara statistika belum begitu baik, kebanyakan siswa menggunakan terminologi yang tidak sesuai dengan maksud dari terminologi yang seharusnya. Penelitian ini bertujuan untuk mendapatkan gambaran mengenai penalaran statistis melalui permasalahan case study. Jenis penelitian ini adalah deskriptif kualitatif dan melibatkan 9 orang mahasiswa Program Studi Pendidikan Matematika, di mana 3 diantaranya berjenis kelamin laki-laki dan yang lainnya adalah perempuan. Instrumen yang digunakan berupa permasalahan case study yang relevan dengan permasalahan nyata di dunia dengan fokus materi pada hal-hal yang berhubungan dengan konsep dasar statistika dan bentuk penyajian data. Hasil penelitian menunjukkan bahwa hampir sebagian besar subjek memiliki kemampuan penalaran statistis pada level penalaran idiosinkratik dan penalaran verbal berkaitan dengan konsep tertentu sedangkan level prosedural dan pengintegrasian proses muncul pada permasalahan terkait bentuk penyajian data. Agar level penalaran statistis siswa dapat meningkat, maka diperlukan adanya rancangan permasalahan yang tepat. Students’ Statistical Reasoning in Solving Case Study Problem AbstractStudent reasoning is statistically not so good; most students use terminology that is not by following the intended meaning of the terminology. This study aims to get an overview of statistical reasoning through a case study problem. This type of research is descriptive qualitative and involves 9 students of the Mathematics Education Department, which 3 are male and the others are female. The instrument used is a case study problem that is relevant to real problems in the world with a focus on material on the basic concepts of statistics and forms of data presentation. The results showed that most subjects had statistical reasoning abilities at the level of idiosyncratic reasoning and verbal reasoning was related to certain concepts, while procedural levels and process integration appeared on problems related to the form of data presentation. So that the level of students' statistical reasoning can increase, it is necessary to design appropriate problems.
Analisis Kemampuan Pemahaman Matematis Siswa pada Materi Bangun Ruang Sisi Lengkung
Authors: Yani Casmi Fitri , Maimunah Maimunah , Roza Yenita , Murni Atma , Daim Zuhri 
Published: June 2019

AbstrakSebagian besar guru tidak memperhatikan kemampuan pemahaman matematis tetapi hanya terfokus pada hasil belajar siswa. Penelitian ini bertujuan untuk mengetahui dan menganalisis kemampuan pemahaman matematis siswa. Penelitian ini adalah penelitian kualitatif. Subjek penelitian adalah 25 siswa kelas IX2 SMP Negeri 1 Kampar Timur. Teknik pengumpulan data yaitu tes dan wawancara. Hasil analisis menunjukkan bahwa kemampuan pemahaman matematis siswa berkemampuan sedang dan rendah masih kurang, sedangkan siswa berkemampuan tinggi sudah cukup baik. Hasil wawancara menunjukkan bahwa siswa mengalami kesulitan dalam memberikan contoh dan bukan contoh dari konsep serta kesulitan dalam mengaitkan berbagai konsep karena tidak memahami konsep dan hanya menghapal rumusnya. Untuk meningkatkan kemampuan pemahaman matematis siswa berkemampuan sedang dan rendah, dalam menyampaikan konsep guru sebaiknya menyertakan contoh dan bukan contoh dari konsep serta memberikan latihan soal-soal tentang mengaitkan berbagai konsep. Analysis of Students’ Ability Mathematical Understanding on the Topic of Curved Side SpaceAbstractMost teachers do not pay attention to the ability of mathematical understanding but only focus on student learning outcomes. This study aims to determine and analyze students' mathematical understanding abilities. This research is qualitative research. The research subjects were 25 IX2 students from East Kampar 1 Middle School. Data collection techniques are tests and interviews. The results of the analysis show that the ability of mathematical understanding of students with moderate and low abilities is still lacking, while high-ability students are good enough. The results of the interview indicate that students have difficulty in giving examples and not examples of concepts and difficulties in relating various concepts because they do not understand the concept and only memorize the formula. To improve the ability of mathematical understanding of students with moderate and low ability, in conveying the concept the teacher should include examples and not examples of concepts and provide training questions about linking various concepts.
ASSESSMENT OF KNOWLEDGE, ATTITUDE AND PRACTICE ON NUTRITIONAL AWARENESS AMONG HEALTH CARE PROFESSIONALS
Authors: Rajalakshmy A P , Lokeshmaran R A , Renuka Dr K 
Published: June 2019

Background: The importance of including Nutrition in the training of health care professionals remains low priority. However, many health care providers are not adequately trained to address lifestyle recommendations that include Nutrition and Physical activity behaviours. This study sought to assess the Knowledge, Attitude and Practice (KAP) on Nutritional Awareness among health care professionals. A descriptive study focuses on the group of Health Care Professionals which includes Physicians, Dentists and Nursing faculty. Interested 90 Participants who fulfilled the inclusion criteria have been chosen through purposive sampling technique. The KAP of Health Care Professional related to Nutritional aspects were collected using structural Questionnaire for assessing Knowledge, Rating Scale for assessing Attitude and checklist for assessing Practice used respectively. Results: Knowledge, Attitude and Practice of the Health Care Professionals likely Physicians, Dentists and Nurses were evaluated on Nutritional awareness. Out of 90 overall 15.5% of participants has inadequate, 43.3% has moderate and 41.1 % has adequate knowledge. All 100% of participants has positive attitude. In case of Practices 1% has fair, 42.2 % has good and 47.7% has excellent practices. There is a statistical Correlations found between KAP in all participants. This study concludes that even though many sources are available to gain Awareness on Nutrition. Since, the knowledge among health care professionals needs to be improved.
OSTEOPOROSIS – A HIDDEN DISEASE AND ITS MANAGEMENT
Authors: R Arun Chandran , R Yogananda , Reddy B Shankar 
Published: June 2019

With the increasing life expectancy, osteoporosis is becoming a serious health problem affecting the modern society especially among women of older age whose early detection can help in reducing the fracture rates and overall socio-economic burden.
Objectives: To assess the baseline knowledge regarding osteoporosis, to improve it by giving awareness, thereby creating a positive attitude among the individuals and to find the risk factors that can lead to this condition.
Materials and Methods: A prospective Interventional study carried out in a community setup by enrolling 204 women subjects between the age of 35 to 65 years, which began with a pre test to assess the knowledge and to find out the risk factors for osteoporosis aided by a self designed questionnaire among the subjects and they are educated by means of leaflets. After a gap, post test been done on the same subjects to assess their improvement of knowledge
Results: The mean pre and post scores are 8.50 and 10.87 respectively which indicates a significant improvement in knowledge with a p value of 0.001 (significant).The major risk factors identified were menopause as well as lack of dairy products in diet.
Conclusion: There is a great need for screening people for this disease and proper intervention as well as involvement of health care providers in community setup can make the people gain knowledge and also getting rid of risk factors.
Key words: Osteoporosis, Knowledge, Women, Interventional, Screening
Contribution of Job Nature on Leadership Style among Academia
Authors: Shrestha Milan 
Published: June 2019

Purpose- Effective leadership practices in schools are only possible while headmaster and teachers adopt suitable leadership styles. The main purpose of this study is to identify the leadership styles as well as determine the association of democratic, autocratic and laissez-faire leadership style with each other among school teachers.
Design/Methodology- This study is based on post-positivist research philosophy and cross-sectional survey as the research design which is confirmatory and explanatory in nature. It gathered the data via self-administer questionnaire from 345 school teachers and analyzed through descriptive statistics and parametric test.
Findings- The researcher derived that school teachers adopted a more democratic leadership style and gave least prefer to the laissez-faire leadership style in schools. Meanwhile, the lacking of equal facility and access to power exercise contributes to making significant differences in leadership styles across the job nature of school teachers. Furthermore, this study assess that there is no relationship between autocratic, democratic and laissez-faire leadership styles. These distinct styles of leadership may develop the differences in work performances of school teachers.
Practical Implications- This research provides the framework for another future researcher to investigate the input of job nature on leadership style among school teachers.