bluuebunny/crossref_metadata_2025 huggingface dataset:
Tingkat Kekasaran Permukaan Roda Gigi Lurus Baja St 37 Pada Kecepatan Putaran Spindel, Variasi Feeding, dan Depth of Cut
Authors: Fasesa Prasetio Dian , Suwarno Suwarno , Tuwoso Tuwoso
Published: June 2020

Di era modern saat ini sudah banyak orang yang bisa membuat sebuah roda gigi, tetapi hasilnya beraneka ragam mulai dari halus, kasar, dan ada pula yang tidak rapi. Perbedaan hasil tersebut dikarenakan proses produksi yang kurang teliti saat pengerjaannya. Karena bukan hanya mesin yang dapat mempengaruhi hasil kerja, namun proses pengoperasian mesin juga sangat berpengaruh terhadap hasil kerja. Tujuan penelitian ini adalah untuk mengetahui tingkat kekasaran permukaan roda gigi lurus baja st 37 pada kecepatan putaran spindle, variasi feeding, dan depth of cut.Penelitian ini menggunakan metode eksperimen untuk mengetahui pengaruh kecepatan putaran spindle, variasi feeding dan depth of cut pada proses milling pembuatan roda gigi lurus baja st 37. Penelitian ini mengamati akibat perubahan suatu metode dan kemudian hasilnya dibandingkan. Bentuk dalam eksperimen ini dijelaskan dalam desain penelitian dimana observasi dilakukan satu kali yaitu sesudah eksperimen. Kecepatan putaran spindle yang digunakan adalah 150 Rpm, 235 Rpm, dan 375 Rpm dengan kecepatan pemakanan (feeding) 22 mm/menit, 35 mm/menit, dan 56 mm/menit dengan kedalaman pemakanan (depth of cut) 0.20 mm, 0.35 mm, dan 0.50 mm. Penelitian dilakukan di Bengkel Mesin dan CNC VEDC Malang. Kemudian alat uji kekasaran permukaan menggunakan Surface Roughness Tester merek Mitutoyo milik Laboratorium Teknik Mesin, Jurusan Teknik Mesin, Fakultas Teknik, Universitas Negeri Malang. Pisau frais yang digunakan adalah pisau modul dengan diameter 2.5 inch. Teknik analisis data yang digunakan adalah deskriptif kuantitatif.Berdasarkan hasil penelitian dapat diartikan bahwa semakin tinggi kecepatan putaran spindle maka nilai kekasaran permukaan semakin rendah. Semakin tinggi feeding nilai kekasaran akan semakin tinggi. Begitu pula semakin tinggi depth of cut maka nilai kekasaran juga akan semakin tinggi. Nilai rata-rata kekasaran permukaan paling rendah adalah 0.17 µm pada kecepatan putaran spindel 375 rpm, depth of cut 0.20 mm, dan feeding 22mm/menit. Sedangkan nilai rata-rata kekasaran permukaan paling tinggi adalah 0.465 µm pada kecepatan putaran spindel 150 rpm, depth of cut 0.50 mm, dan feeding 56 mm/menit. Oleh karena itu tingkat kekasaran permukaan sangat dipengaruhi oleh kecepatan putaran spindle, kecepatan pemakanan (feeding), dan kedalaman pemakanan (depth of cut).
Studi Pengelolaan Uji Kompetensi Keahlian Berlisensi Lembaga Sertifikasi Profesi Pada Jurusan Teknik Mesin di Smkn 1 Blitar
Authors: Setiawan Andika , Widiyanti Widiyanti , Sunomo Sunomo
Published: June 2020

Uji kompetensi keahlian berlisesnsi LSP di SMKN 1 Blitar bertujuan untuk menyertifikasi peserta didiknya terhadap kompetensi yang dimiliki selema menempuh pembelajaran di sekolah. Sertifikat LSP diberikan oleh siswa yang berkompeten dan diterbitkan langsung oleh Badan Nasional Sertifikasi Profesi (BNSP). Dengan adanya sertifikat ini siswa akan mendapat pengakuan terhadap kompetensi yang dimilikinya. Pengelolaan uji kompetensi LSP ini terdiri dari beberapa tahap yaitu, persiapan, pelaksanaan, evaluasi dan penerbitan sertifikat. Selain seagai pengakuan sertifikat ini diharapakan bisa menjadi pertimbangan dalam penyerapan tenaga kerja di dunia usaha maupun dunia industri.
Evaluasi K-3 Dalam Pencegahan Kecelakaan dari Penyakit Nosokomial Tenaga Kerja Kesehatan
Authors: Santoso Gempur
Published: June 2020

Keadaan saat ini, kejadian terjakit nosokomial masih mewabah. Resiko paparan nosokomial terutama adalah pada tenaga kerja (petugas) kesehatan. Secara deskriptif angka kejadian infeksi nosokomial tercatat di berbagai negara sekitar 3,3%-9,2%. Dari analisis data deskriptif dapat disimpulkan bahwa dalam pencegahan penyakit nosokomial harus mengontrol pasien sebagai sumber penyakit, peralatan kesehatan, peralatan petugas kesehatan, dan mensterilisasi peralatan serta lingkungan tempat kerja.
Analisis Kecepatan Putar, Durasi Gesek dan Tekanan Terhadap Kekuatan Tarik Hasil Pengelasan Gesek (Friction Welding)
Authors: Gita Firmansyah Muhammad Rizka , Solichin Solichin , Poppy Puspitasari Rr
Published: June 2020

Pengelasan busur listrik elektroda terbungkus cocok digunakan untuk pelat-pelat datar. Namun untuk benda pejal sulit untuk dilakukan, apabila digunakan untuk benda pejal, maka, hasilnya kurang baik. Salah satu solusi untuk mengelas benda pejal yaitu menggunakan pengelasan gesek. Tujuan penelitian ini adalah untuk mengetahui kekuatan tarik hasil pengelasan gesek (friction welding) dengan variasi kecepatan putar, durasi gesek dan tekanan serta mengetahui bagaimana struktur mikro hasil pengelasan gesek (friction welding). Metode yang digunakan dalam penelitian ini menggunakan model one-shot case study dan analisis deskriptif. Analisis deskriptif meliputi hasil uji tarik dan struktur mikro hasil pengelasan gesek. Berdasarkan hasil penelitian yang dilakukan, nilai kekuatan tarik yang paling tinggi dihasilkan pada variasi kecepatan putar 2850 Rpm, durasi gesek 60 detik pada tekanan 8 Mpa. Sedangkan untuk hasil kekuatan tarik yang paling rendah yaitu dihasilkan pada variasi kecepatan putar 2850 Rpm, durasi gesek 80 detik pada tekanan 8 Mpa. Hasil foto mikro menunjukan bahwa tidak ada perubahan fase pada hasil pengelasan gesek hanya terjadi penghalusan partikel Mg2Si pada daerah Zpd dan Zpl, sedangkan pada daerah Zud memiliki bentuk partikel Mg2Si yang sama dengan spesimen tanpa perlakuan.
Prototype Arm Robotic 6 Axis Untuk Menyiapkan Kompetensi Pemrograman Matakuliah Mekatronika Mahasiswa Prodi D3 Teknik Mesin
Authors: Marsono Marsono , Elbaith Ilham Ari , Qolik Abdul
Published: June 2020

Abstrak: Seiring dengan pesatnya perkembangan teknologi pada akhir dekade ini, dunia industry mengubah sumber daya yang mereka miliki menggunakan bantuan teknologi robot. Penggunaan robot dipilih karena keakuratan dan kepresisian yang mampu dilakukan dalam melakukan pekerjaan. Selain itu, teknologi robot hanya memerlukan satu kali pemrograman untuk melakukan banyak hal. Dengan demikian banyak keuntungan yang diperoleh perusahaan dengan menggunakan teknologi robot dalam proses produksinya.Menyikapi kondisi tersebut, dunia pendidikan khususnya Universitas harus segera menyiapkan lulusannya yang memiliki kompetensi sesuai kebutuhan industry dalam pemrograman robot lengan. Program studi D3 Teknik Mesin sebagai salah satu program studi bidang teknik rekayasa sudah memberikan salah satu matakuliah untuk membekali lulusannya yaitu dalam matakuliah mekatronika. Akan tetapi, terdapat kekurangan dibidang sarana dan prasarana yaitu belum adanya lengan robot untuk pembelajarannya. Selama ini, mahasiswa belum diberikan materi ajar pemrograman robot lengan sehingga apabila lulusan bekerja di industry yang menggunakan robot lengan mereka akan mengalami kesulitan.Penelitian ini adalah penelitian pengembangan dengan merancang dan membangun Prototype Arm Robotic 6 Axis untuk mengajarkan bahasa pemrograman robot lengan. Hasil dari penelitian ini berupa prototype robot lengan dengan pemrograman berbasis Arduino. Harapannya dengan adanya protopype ini mahasiswa akan dapat dengan mudah dan terbiasa memprogram robot lengan khusunya untuk gerakan-gerakan pekerjaan yang sama dengan yang dikerjakan di dunia industry.
Pengelolaan Program Keahlian Ganda Guru KompetensiTeknik Kendaraan Ringan (TKR) dan Teknik Komputer Jaringan (TKJ) di SMKN 12 Malang
Authors: Ari Tahta Maulana
Published: June 2020

Keahlian ganda merupakan program yang dijalankan oleh Kementrian Pendidikan dan Kebudayaan dengan melibatkan berbagai pihak, yaitu Direktorat Jenderal GTK, PPPPTK, Dinas pendidikan kabupaten/kota, SMK, guru pembimbing, guru peserta Program Keahlian Ganda, program ini untuk terobosan kurangnya guru produktif di SMK. Tujuan Penelitian, untuk mengetahui persiapan, komponen pengelolaan, dan penilaian kegiatan keahlian ganda. Metode menggunakan pendekatan kualitatif dan menggunakan trianggulasi metode. Hasil penelitian diketahui peserta guru keahlian ganda umur harus dibawah 55 tahun, bukan guru honorer. Guru pendamping harus kompeten dengan keahlian tertentu dan mempunyai pengalaman mengajar minimal 5 tahun. Struktur progam yang digunakan dalam keahlian ganda semua sudah disusun oleh P4TK. Pelatihan menggunakan modul yang dijadikan acuan mengajar. Proses RPP dan belajar mengajar (ON) oleh peserta keahlia ganda menyesuaikan silabus sekolah. Dalam pembuatan RPP harus disesuaikan dengan KI/KD pada silabus. Penilainya meliputi ON-1, IN-1, ON-2, IN-2. Kriteria Capaian Minimal (KCM) memenuhi peserta keahlian ganda bisa melanjutkan ke tahap IN-1, dan seterusnya sampai IN-2. Untuk jadi peserta harus sesui syarat/kriteria yang telah ditentukan oleh Dirjen GTK, dan harus memilih guru yang berkometen di bidangnya untuk guru instruktur dan pendamping.
Pengaruh Kapabilitas Kerja, Bimbingan Karir, dan Nilai Praktikum Terhadap Kesiapan Kerja Kelas XII Program Keahlian Teknik Pemesinan di SMK PGRI 3 Malang
Authors: Zuhri Syaifudin
Published: June 2020

Penelitian ini bertujuan untuk mendeskripsikan pengaruh kapabilitas kerja, bimbingan karir, dan nilai praktikum kelas XII program keahlian teknik pemesinan di SMK PGRI 3 Malang. Penelitian ini menggunakan metode penelitian deskriptif dan pendekatan kuantitatif dengan menggunakan instrumen berupa kuesioner dan dokumentasi. Data penelitian berupa angket siswa dan hasil nilai rapot semester ganjil. Diolah dengan menggunakan analisis statistik, uji asumsi klasik dan uji hipotesis untuk membuktikan hipotesis adanya pengaruh kapabilitas kerja, bimbingan karir, dan nilai praktikum terhadap kesiapan kerja. Anggota populasi siswa kelas XII berjumlah 86 siswa. Sampel diambil dengan teknik simple random sampling sehingga setiap anggota populasi memiliki peluang yang sama untk menjadi sampel penelitian, berjumlah 71 siswa. Hasil penelitian disimpulkan bahwa ada pengaruh yang signifikan antara kapabilitas kerja, bimbingan karir, dan nilai praktikum terhadap kesiapan kerja kelas XII program keahlian teknik pemesinan di SMK PGRI 3 Malang.
Pengembangan Modul Berbasis Aplikasi Android untuk Mata Kuliah Ilmu Bahan Teknik pada Prodi D3 Teknik Mesin Universitas Negeri Malang
Authors: Rubianto Ahmad
Published: June 2020

Abstrak: Mata kuliah Ilmu Bahan Teknik merupakan mata kuliah wajib bagi mahasiswa Jurusan Teknik Mesin Fakultas Teknik Universitas Negeri Malang. Pembelajaran dengan sistem konvensional dalam proses pembelajaran Ilmu Bahan Teknik saat ini sudah bagus, namun dalam segi pemanfaatan dan penggunaan media pembelajaran masih kurang efektif, dan bisa dikembangkan lagi agar pembelajaran bisa lebih bervariasi dan mampu menjadikan mahasiswa dapat belajar secara mandiri. Tujuan penelitian dan pengembangan ini antara lain mengembangkan produk berupa modul berbasis aplikasi android untuk mata kuliah Ilmu Bahan Teknik serta mengetahui tingkat daya tarik mahasiswa terkait modul berbasis aplikasi android yang digunakan. Hasil validasi yang diperoleh adalah sebagai berikut: (1) validasi konstruk menunjukkan persentase 75%, (2) validasi konten menunjukkan persentase 79,41% (3) hasil face validity oleh kelompok kecil menunjukkan persentase 70,59%, (4) validasi ahli media menunjukkan persentase 90,63%, dan (5) ujicoba daya tarik oleh kelompok besar menunjukkan persentase 81,11%. Kata Kunci: pengembangan modul, android, ilmu bahan teknik.
Pengembangan Massive Open Online Courses (MOOCs) pada Materi Pengelasan
Authors: Suyetno Agus
Published: June 2020

Perkembangan dunia pendidikan saat ini tidak lepas dari perkembangan ilmu pengetahuan dan teknologi. Dunia pendidikan dituntut agar selalu bergerak seiring perkembangan teknologi global. Moodle merupakan salah satu jenis LMS (Learning Management System) yang memungkinkan komunikasi dua arah antara pendidik dan peserta didik. Matakuliah yang akan diimplementasikan dalam pengembangan inovasi sistem pembelajaran adalah matakuliah Pengelasan. Model yang digunakan dalam pengembangan MOOC pada matakuliah Pengelasan adalah model ADDIE. Tahapan dalam pengembangan model ADDIE yaitu (1) Analisis, (2) Desain/perencanaan, (3) Pengembangan, (4) Implementasi eksekusi, dan (5) Evaluasi/umpan balik. Model pengembangan ADDIE disusun secara terprogram dengan urutan-urutan kegiatan yang sistematis dalam upaya pemecahan masalah belajar yang berkaitan dengan media pembelajaran yang sesuai dengan kebutuhan dan karakteristik peserta didik. MOOC Pengelasan merupakan pengembangan dari Moodle yang disediakan oleh hosting UM, sehingga MOOC pengelasan diinstall pada domain http://mooc.um.ac.id/. MOOC Pengelasan memuat beberapa fitur dan dapat diakses oleh peserta didik, pendidik dan masyarakat umum. Fitur yang dapat diakses antara lain: (1) Rekaman aktivitas; (2) Daftar kompetensi; (3) Materi terdiri dari berbagai jenis media; (4) Forum diskusi; (5) Evaluasi dan analisis. MOOC Pengelasan yang dikembangkan terbukti dapat menunjang kegiatan praktikum, hal tersebut dapat dilihat dari angket yang disebar kepada mahasiswa. Berdasarkan angket yang disebar didapatkan hasil bahwa MOOC yang dikembangkan memiliki tingkat kelayakan yang tinggi dengan persentase 83,22%. Dengan tingkat kelayakan tersebut, maka MOOC Pengelasan yang dikembangkan dianggap layak untuk digunakan dalam praktikum Pengelasan dan memiliki tingkat kelayakan yang tinggi. Berdasarkan angket yang disebar didapatkan hasil bahwa MOOC yang dikembangkan memiliki kemudahan penggunaan yang tinggi dengan persentase 84,40%. Dengan tingkat kemudahan tersebut, maka MOOC Pengelasan yang dikembangkan dianggap layak untuk digunakan dalam penunjang praktikum dan mudah untuk digunakan. Kata kunci: Moodle, MOOC, Pengelasan, Media Pembelajaran
Pengaruh Variasi Arus Pengelasan dan Debit Aliran Gas Pelindung Terhadap Kekuatan Tarik Stainless Steel 304 pada Proses Las GTAW
Authors: Saefudin Ahmad
Published: June 2020

Tujuan dari penelitian ini untuk mengetahui kekuatan tarik stainless steel 304 dari pengelasan GTAW dengan variasi kuat arus dan debit aliran gas. Metode penelitian yang digunakan adalah penelitian eksperimental dengan variasi kuat arus 80A, 90A dan 100A dan debit aliran gas pelindung sebesar 8 L/menit dan 10 L/menit. Sampel untuk pengujian menggunakan standar uji ASTM E8/E8M-09. Hasil analisis statistik kuat arus menunjukkan  bahwa nilai signifikansi sebesar 0.032 lebih kecil dari 0,05, atau H0 ditolak artinya  penggunaan variasi kuat arus berpengaruh terhadap kekuatan tarik. Sedangkan analisis statistik untuk dabit aliran gas palindung menunjukkan  bahwa nilai signifikansi sebesar 0.144 lebih besar dari 0,05, atau H0 tidak ditolak artinya penggunaan variasi debit aliran gas pelindung tidak berpengaruh terhadap kekuatan tarik. Nilai kekuatan tarik tertinggi terdapat pada penggunaan arus 90A dengan debit aliran gas 8 L/menit sebesar 610,54 Mpa. Nilai kekuatan tarik terendah terdapat pada penggunaan arus 80A dengan debit aliran gas10 L/menit sebesar 560,89 Mpa.Kata Kunci: Stainless Steel, GTAW, Kua Tarik, Tungsten Inert Gas
Pengembangan Kartu Peminjaman Alat Bengkel Berbasis Aplikasi Personal Computer pada Bengkel Praktikum Program Keahlian Teknik Pengelasan di SMK Negeri 1 Singosari
Authors: Bagus Awang
Published: June 2020

Sekolah menengah kejuruan memiliki standar kompentesi lulusan agar penyelengara pendidikan melakukan kegiatan dengan baik sesuai aturan yang ada. Salah satu yang harus dipenuhi suatu bengkel untuk memenuhi standar sarana dan prasarana adalah bengkel harus memiliki kartu peminjaman alat bengkel. Dengan adanya kartu peminjaman alat bengkel ini pengelolaan manajemen bengkel akan dipermudah dari sisi pemantauan kondisi alat bengkel yang dipakai siswa. Tujuan dari penelitian dan pengembangan ini adalah membuat kartu peminjaman alat bengkel berbasis aplikasi personal computer, supaya mempermudah siswa dan laboran dalam proses peminajaman dan monitoring alat bengkel saat praktikum. Berdasarkan validasi ahli materi, uji coba kelompok kecil dan uji coba lapangan, maka didapatkan hasil kelayakan sebesar 88,3% dari ahli materi, 89,8% dari uji coba kelompok kecil, dan 92% dari uji coba lapangan dan dinyatakan layak sehingga aplikasi kartu peminjaman berbasis personal computer ini layak digunakan dengan revisi mempertimbangkan poin – poin yang kurang bagus. Kata kunci: alat bengkel,aplikasi, personal computer
Evaluación de la remoción de sulfuro de hidrógeno de biogás empleando arcilla ecuatoriana modificada con sodio, zinc y cobre y adaptada morfológicamente
Authors: Núñez Marlon Homero , García Berfon Luis Vicente , López de García Carmen Milena
Published: June 2020

The H2S removal capacity, of an Ecuadorian clay was studied. The clay was modified with Na, Cu, and Zn, and then morphologically adapted to the shape of extrudates.  The H2S removal capacity was evaluated, using a fixed bed filter that contained the extrudates, coupled to a biogas stream, with 2.2% H2S, and flow of 1mL/s, at a gauge pressure of 2 psig, and environment temperature of 30 °C. The biogas stream came from an anaerobic vinasse treatment bioreactor. The H2S concentration at the inlet and outlet of the filter was determined by means of GASTEC 4H and 4HH ampoules, using a GASTEC GV-100-S-TR aspiration pump. The best results were obtained with the solid ST15% Na15% Cu15% Zn, which maintained its sorption characteristics for 920 min before saturating, removing 2.84 mmol of H2S/g of sorbent while industrial activated carbon, used to reduce H2S concentration, had a removal capacity of 2.58 mmol of H2S/g of carbon and saturated at 540 min.
As Barreiras da Criatividade dos Egressos do Ensino Superior EAD e Presencial
Authors: Ramos Joseli Konig , Boeira Jeane Caroline , Kroenke Adriana , De Souza Domingues Maria Jose Carvalho
Published: June 2020

A criatividade está presente em nosso dia a dia. Ela se destaca tanto nosambientes pessoais, assim como nos escolares e profissionais. Com este artigo, tem-se o objetivo de verificar se há barreiras na criatividade dos egressos do ensinosuperior nas modalidades de ensino EAD (Ensino a distância) e presencial,pluricurriculares. Para isso, foi aplicado um questionário por escala likert de 7 pontospara 283 egressos do ensino superior. Realizou-se o embasamento teórico sobrecriatividade e o indivíduo, suas barreiras elencadas em quatro construtos,inibição/timidez; falta de tempo/oportunidade; repressão Social; falta de motivação.Os dados foram analisados através de correlação, obtendo, como resultado dasanálises dos dados, a indicação de que ambos os ensinos se correlacionam de formapositiva quanto às barreiras do desenvolvimento da criatividade para o EnsinoPresencial e Ensino EAD. Há de se considerar que o Ensino EAD ainda se mostra comresultados superiores, sendo possível encontrar fundamentos adicionais e explicaçõesmais detalhadas sobre o tema.
Palavras-chave: Criatividade. Ensino superior. Ensino a distância. Ensino presencial.
The Relationship between Norms and Risky Driving Behavior: A Systematic Review
Authors: HARITH Siti Hawa , MAHMUD Norashikin
Published: June 2020

Background: Road accident statistics has been seen increasing over the years despite numerous efforts made by the authorities. Human factors have contributed 90% of accident occurrence with risky driving behavior being one of the significant human factors that can be further explained through norms. This review paper aimed to investigate the relationship between norms and drivers’ risky driving behavior. Methods: A systematic review process was conducted through four academic databases namely Scopus, Wiley Online Library, Emerald and Web of Science of no limitation for date. Overall, 3443 titles were identified and after several screening and reviewing processes, only 27 studies were included. Results: The results of the review demonstrated mixed findings between subjective norm and risky driving behavior, whereas the relationship between group norm, moral norm, injunctive norm, descriptive norm and risky driving behavior were observed significant. Conclusion: Appropriate educational awareness is required to educate the society in practicing good norms for mutual benefit of the society. Parents also need to set a good example for their children by abiding the traffic rules and regulation.
Effects of Smoking, Drinking, and Urban Environment on Obesity in Seoul, Korea
Authors: CHUN Haejung
Published: June 2020

Background: The level of obesity is related to spatial characteristics around the individual. The objective of this study was to empirically analyze the effect of smoking, drinking, and urban environment on obesity in community residents. Methods: This study was conducted for empirical analysis using Ordinary Least Squares (OLS) model not considering time or space-effects, Temporal Autoregressive (TAR) model considering time-effect only, Spatial Autoregressive (SAR) model considering space-model only, and STAR model considering both time and space effects. This study covered 25 autonomous districts in Seoul City, South Korea in terms of space and from 2009 to 2014 in terms of time. Results: The STAR model yielded an adjusted R square higher than that from OLS, TAR, or SAR model. Empirical results from the STAR model showed significantly positive (+) effects of the ratio of dependent elders, ratio of smokers, ratio of drinkers, and areas of retail floor space on obesity. In contrast, effects of length of bicycle road and the amount of collected local tax on obesity were negative (-) with statistical significance. Conclusion: Smoking and drinking rate and the length of bicycle road can contribute to personal obesity.
Analysis of Mortality from Carcinomas Primary Localized in Region of Lip, Oral Cavity and Pharynx in Central Serbia, 1999-2015
Authors: STEPOVIC Milos M. , STAJIC Dalibor , SEKULIC Marija , RAJKOVIC Zlata , DJONOVIC Nela
Published: June 2020

Background: Lip, oral cavity, and pharyngeal cancers have been globally estimated to account for about 3.8% of all cancer cases and 3.6% of cancer deaths. Mortality of these cancers is generally higher in developing than in developed countries. Overall cancer mortality rate in Serbia is one of the highest in the world. The aim of this study was to determine the mortality rate trends and the most common localization of lip, oral and pharyngeal cancers in Serbia. Methods: The study was conducted in 2018 as descriptive epidemiological study and included years from 1999 to 2015. The differences in standardized mortality rates and number of deaths were analyzed with regard to age, gender, and tumor localization. Linear trend and regression were used to determine mortality rate trend. Results: There was statistically significant difference in the number of deaths between men and women in the ages of 40 and over (P < 0.01); male/female cancer mortality ratio was 4.56:1. Generally, the most common localization of this carcinoma was hypopharynx. There was no statistically significant increase of mortality rates from these cancers for both genders (males: y = 4.77 + 0.42x, P = 0.069 % change = +20.35; females: y = 1.03 + 0.01x, P = 0.40 % change = +4) during 17-year period. Conclusion: Promotion of healthy habits, life-styles and regular inspection of mouth by patients and health professionals should be better prioritized especially in developing countries where implementing and improving national health prevention programs are essential.
Mir-29c Expression in Glioma and Its Effects on Tumor Cell Proliferation and Apoptosis
Authors: HUI Peiquan , WANG Yuling , CHEN Bing , WANG Zengwu , QIN Shiqiang
Published: June 2020

Background: To investigate the expression of microRNA-29c (miR-29c) in glioma and its effects on cell proliferation and apoptosis. Methods: A retrospective analysis was performed on 76 glioma patients in People's Hospital of Weifang, Weifang, Shandong, China from May 2013 to June 2017 (experimental group) and 63 healthy subjects in the same period (control group). qRT-PCR was used to detect the miR-29c expression. Changes of serum miR-29c expression level and the correlation of miR-29c of glioma patients with the degree of tumor differentiation and pathological type were observed. Cells were grouped before transfection into blank group (no transfection), negative control group (transfected with miRNA NC) and experimental group (transfected with miR-29c mimics). CCK-8 assay was used to detect cell proliferation, flow cytometry to detect apoptosis. Results: Expression of miR-29c in serum was significantly lower in experimental group than that in control group (P<0.05). The expression level of miR-29c of glioma patients increased with the degree of tumor differentiation (P<0.05). miR-29c in serum was not significantly correlated with the pathological type. Conclusion: miR-29c could inhibit the proliferation of glioma cells and promote apoptosis. miR-29c is lowly expressed in glioma, and the overexpression of which in glioma cells can inhibit tumor cells proliferation and promote apoptosis. It may be a tumor suppressor miRNA of glioma, and the expression level of which can be used as reference for evaluating the grade of glioma. It is indicated that the abnormal expression of miR-29c may be a key factor in the occurrence and development of glioma.
Prevalence and Associated-Factors for Entamoeba gingivalis in Adolescents in Southeastern Iran by Culture and PCR, 2017
Authors: SHARIFI Maryam , JAHANIMOGHADAM Fatemeh , BABAEI Zahra , MOHAMMADI Mohammad Ali , SHARIFI Fatemeh , HATAMI Nima , DANESH Masumeh , POURESLAMI Parnian , POURESLAMI Hamidreza
Published: June 2020

Background: This study aimed to identify the prevalence and potential factors associated with Entamoeba gingivalis in adolescents in the city of Kerman, southeastern Iran, 2017. Methods: In this descriptive cross-sectional study, 315 adolescents (mean age; 15 yr) consisting of 189 males and 126 females were randomly selected. For each adolescent, two specimens were collected for culturing and examination by polymerase chain reaction (PCR). Univariate and multivariate logistic regression models were performed to explore any association with demographic and clinical variables. Results: The prevalence of E. gingivalis was 11.7%. Totally, 30 (15.9%) males and 7 (5.6%) females were infected with E. gingivalis. The rate of infection in males was 2.8 times higher than that in females (P<0.001). Statistical analysis identified 4 major factors including sex (OR=4.12, P<0.001), gingival index with severe inflammation (OR = 50, P<0.001), Candida spp. infection (OR=4.41, P<0.001) and decay-missing- filled teeth [DMFT (OR=3.27, P<0.001)]. In contrast to the aforementioned factors, adolescents with history of antibiotic consumption were significantly protected from E. gingivalis infection (OR= 3.24, P<0.001). Culture media detected 9.2% (n= 29), whilst PCR identified 11.4% (n= 36) of infection. Conclusion: The present findings clearly demonstrate a positive association between E. gingivalis and distinct demographic and clinical risk determinants. Therefore, dental practitioners and health surveillance personnel should be aware of these confounding factors to rigorously detect and critically manage oral health issues in school-age children in order to prevent or at least minimize the eventual periodontal complications in later life.
Prevalence of Abdominal Obesity and Metabolic Syndrome in Children and Adolescents: A Community Based Cross-Sectional Study
Authors: AHMADI Nastaran , SADR Seyed Mahmood , MOHAMMADI Mohammad Reza , MIRZAEI Masoud , MEHRPARVAR Amir Hooshang , YASSINI ARDEKANI Seyed Mojtaba , SAREBANHASSANABADI Mohammadtaghi , NILFOROSHAN Neda , MOSTAFAVI Seyed-Ali
Published: June 2020

Background: Although the prevalence of abdominal obesity and metabolic syndrome has been widely studied in the adult population, little is known about it in children and adolescents especially in developing countries. This study aimed to determine the prevalence of abdominal obesity and metabolic syndrome among children and adolescents in Yazd Greater Area, Iran; over the period of 2016-2017. Methods: This study was part of a larger national study with a cross-sectional design. Using multistage cluster random sampling method, 1035 children, and adolescents of both sexes aged 6-18 yr were randomly selected from rural and urban districts in Yazd Greater Area, Iran. Components of metabolic syndrome, and anthropometry measured in the standard situation. Results: The prevalence of abdominal obesity in children 6-10 yr old was 13.2% in boys versus 24.7% in girls. The overall prevalence of metabolic syndrome according to International Diabetes Federation (IDF) criteria in adolescents aged 10-18 yr old was 7.6% (9.4% in boys). The most prevalent metabolic syndrome components were low HDL-cholesterol (56.2%) and abdominal obesity (27.8%). Conclusion: Comparatively, the prevalence of metabolic syndrome in Yazd is high. Low HDL-cholesterol levels and abdominal obesity were the most common component, and family history of heart disease, BMI, and male gender were the main determinants of metabolic syndrome in adolescents.
Effect of Chitosan Nanoparticle from Penaeus semisulcatus Shrimp on Salmonella typhi and Listeria monocytogenes
Authors: ALEBOUYEH Sogol , ASSMAR Mehdi , MIRPOUR Mirsasan
Published: June 2020

Background: After cellulose, chitin is one of the most important polymers in crustaceans, insects, and fungi. Chitosan is one of the most important derivatives of chitin, which has important characteristics including degradability, non-toxicity, and biocompatibility antimicrobial and antioxidant properties. Methods: Chitosan was extracted from Penaeus semisulcatus shrimp using chemical methods and the degree of its austenitization was determined using a sub-red spectrophotometer and XRD. The nanoparticles were then synthesized using the ionic gelation method and analyzed through SEM. The antimicrobial effects of nanoparticles were also evaluated using antimicrobial tests on Listeria monocytogenes and Salmonella typhi. Results: Nanoparticles have antimicrobial activity and can inhibit bacterial growth at different concentrations. Conclusion: Chitosan nanoparticles have an inhibitory effect on Listeria monocytogenes, which is a gram-positive bacterium.
Increased Physical Activity Decreases Prevalence of Periodontitis: The Korean National Health and Nutrition Examination Survey (KNHANES Ⅵ) (2013-2015)
Authors: KIM Eun-Jeong , HAN Gyeong-Soon
Published: June 2020

The article's abstract is no available.
Ipsilateral Lumbosacral Dysfunction among Taxi Drivers of Left Side Steering Wheel
Authors: ARSLAN Syed Asadullah , OLYAEI Gholamreza , HADIAN Mohammad Reza , TALIBIAN Saeed , YEKANINEJAD Mir Saeed , MALMIR Kazem , NOOR Rabiya , BASHIR Muhammad Salman
Published: June 2020

The article's abstract is no available.
Changes in the Results of Periodic Occupational Examinations in Four Years: A longitudinal study in a steel industry
Authors: Rabiei Hadiseh , Akbari Hossein , Davoudi Niloufar , Bahrami Abbas
Published: June 2020

Introduction: Since occupational diseases are costly and have a direct impact on workers’ health, their identification and investigation are necessary. The purpose of this study was to investigate changes in the results of periodic occupational examinations and their effective factors over the last four years in Steel Industry of Kashan City.
Methods: This longitudinal study was conducted in a steel company in 2018. In order to investigate the changes, the results of periodic occupational examinations in this company were reviewed from 2014 to 2018. Blood pressure, blood glucose, audiometry, optometry, spirometry, and liver enzymes were evaluated. The results of medical records were analyzed by SPSS software version 21.
Results: The mean age, work experience, and body mass index of participants were 19.19 years, 9.45 years, and 27.58, respectively. The results showed that the most common disease was hearing loss. High levels of glucose and high cholesterol increased dramatically over the studied period. A significant difference was observed between AST and ALT in 2014 (P <0.05).
Conclusion: The results showed that some diseases were more prevalent among the staff due to the lack of attention to occupational health controls, the nature of work, and lack of proper control of occupational stress. Moreover, the results of this study can be used to improve the working conditions and choose the appropriate control measures for occupational diseases.
Identification and Evaluation of Human Error by Human Error Assessment and Reduction Technique Technique in Overhead Cranes Operators : A case study in a steel industy in Khuzestan
Authors: Nezamodini Zeinab Alsadat , Jafari Behnoush , Jazayeri Seyd Amin
Published: June 2020

Introduction: Studies in the field of industrial accidents show that human errors have the most important and main role in the occurrence of accidents. According to the literature, 60 to 90% of accidents occur due to the human errors and mistakes. Therefore, in this study, human errors among overhead cranes' operators working in steel industry were identified and analyzed by Human Error Assessment and Reduction Technique (HEART).
Methods and Materials: This cross-sectional study examined the operators of overhead cranes in a steel industry in Khuzestan for 5 months. In this study, the tasks of the operators of 18 cabin control overhead cranes were analyzed by HTA method. Later, using the HEART method, the probability of human error for each task was calculated quantitatively.
Results: The results showed that the most important contributors to human error in both types of cabin and pendant overhead cranes included failure to understand the risk, the operators' inadequate physical and mental conditions, and disruption of the normal sleep cycle.
 
Conclusion: Based on the results, it can be concluded that the HEART method was successful in ranking tasks due to the magnitude probability of errors. In order to reduce human error, the authorities are recommended to improve the employees' performance, prevent error caused by human factors, control strategies such as proper working guidelines, improve the quality of staff training, emphasize compliance with rules and regulations, plan regular work shifts, and develop programs to reduce the stress probability of error.
Risk Assessment of the Najmieh Hospital Electricity System using Energy Trace and Barrier Analysis Method
Authors: Sarvestani Kazem , Salem Mohammad
Published: June 2020

Introduction: Considering application of multiple electrical equipment, numerous occupational accidents occur in hospitals each year. Electrical accidents are severe and impose high costs on the individuals and organizations. The aim of this study was to assess the risk of electrical systems in one of the oldest hospitals under supervision of Baqiyatallah University using energy trace and barrier analysis method (ETBA).
Methods and Materials: All wall plugs, switches, stationary and portable equipment, and stationary and portable electrical panel were evaluated in terms of earthing and appearance. This was done using a simple voltmeter and a 100-watt bulb. All equipment and electrical panel were examined for the presence of Residual Current Device. The ETBA worksheets were completed for each equipment and workstation. The existing barriers were identified and initial risk reduction numbers were calculated. Barriers and solutions were suggested for the equipment or workstation that was at higher risk. Controlled risk was calculated by considering new barriers.
Results: The ETBA worksheets were completed for 71 devices and workstations. The initial and controlled risk was calculated. Surveys revealed that all sections of the main building and the departmental structures did not have a good status regarding the earth condition. Risk assessment of the equipment and stations by ETBA method indicated that 97% of the equipment were not at an acceptable level of risk, 52% were at the unacceptable risk level, 45% were at undesirable risk level, and only 3% were at the acceptable risk.
Conclusion: The results of this study can be used to prioritize resource allocation to eliminate hospital defects and reduce the risk of accidents up to an acceptable level.
Health and Safety Hazard Identification and Evaluation in Sun Air Reaserch Institiute of Ferdowsi University of Mashhad Using the FMEA Approach
Authors: Karami Javad
Published: June 2020

Introduction: Renewable energies, such as wind and solar energy have attracted the attention of scientific, research, and industrial communities due to its fewer threats to the environment and human health. The purpose of this study was to identify and assess the safety and health risks of the Sun Air research institute of Ferdowsi University of Mashhad.
Methods: In this descriptive cross-sectional study, the failure mode and effect analysis (FMEA) technique was used to identify and assess the risks of all Sun Air Research Institute of Ferdowsi University of Mashhad units in the second half of 2019. The HSE management team identified the risks of each unit separately and assessed the risks. All risks were prioritized following identification based on the range of priority numbers (RPN) method resulting from multiplication of the Occupancy, Severity, and Detectability components as well as the control measures.
Results: The RPN ranged from 18 cases related to repetitive work in inspection operations to RPN=180 related to electric current leakage. Among the risks, three potential risks had  higher priority, which included electric current leakage (RPN=180), inhalation of toxic substances (RPN=162), and falling from a height (RPN=150). Other risks were ranked next in priority.
Conclusion: The results showed that use  of FMEA technique was appropriate to identify and assess occupational risks in research and renewable energy production environments that lead to identification of risks at different levels. This helps the HSE team to eliminate or reduce the level of risks by providing control solutions with the priority of unacceptable risks.
Corona Pandemic, Earth Restart Button
Authors: Pakzad Behnoosh , Owlia Mohammad Bagher
Published: June 2020

Introduction: December 2019 marked the beginning of the outbreak of the coronavirus, a disease that began in China and the city of Wuhan, the capital of Hubei Province, and soon spread rapidly, involving individuals and health organizations. Finally, on March 11, the head of the World Health Organization identified coronavirus as a pandemic disease, and the world entered a new phase in the fight against the disease. In this article, we are going to discuss the changes in health behaviors, demographic and economic changes.
A Review on Commonly Used Scaffolds in Tissue Engineering for Bone Tissue Regeneration
Authors: Jalali Jahromi Azarmidokht , Mirhosseini Mahboubeh , Molla Hoseini Hosein , Nikukar Habib
Published: June 2020

Introduction: Bone is one of the tissues that have a true potential for regeneration. However, sometimes the bone defects are so outsized that there is no chance of bone self-repair and restoration or the damage is such that it is not possible to repair with medical or surgical interventions. In these situations, bone grafts are the treatment of choice, but due to several obstacles, including limitation in graft preparation and immunological incompatibility, bone grafts face some limitations. In these cases, with the help of regenerative medicine, the bone damages could be repaired. Regenerative medicine provides a new approach for large bone defects by cell therapy and tissue engineering. As, sometime the damaged tissues are so wide that there is no chance of self-repair, the engineered structures help to accelerate the tissue natural repairing. This review focuses on the importance of stem cells and scaffolding for bone tissue engineering. Also, the important characteristics of bone tissue engineered scaffolds like structure, porosity, stability, surface chemistry, bone induction and different met hods of scaffold fabrication are discussed. Up to now, various natural and synthet ic compounds were used for bone tissue engineering, including biopolymers, which are categorized to natural, synthet ic and ceramics. Bioceramics work as effective compound scaffolds in bone tissue engineering. From them bioglasses are one of the important materials which enhance the attachment, proliferation and differentiation of bone cells. Therefore, the current paper discussed biopolymers, as the effective compounds for regeneration of bone tissue.
Frequency of Stress, Anxiety and Depression in Patients with Alopecia Areata and Control Group Referring to Skin Clinics of Yazd City in 2017
Authors: Ebrahimzadeh Ardakani Mohammad , Dastjerdi Ghasem , Hasani Sepideh
Published: June 2020

Introduction: Alopecia areata is a fairly common disease characterized by patchy aria of hair loss. The role of psychological factors in the occurrence of alopecia areata has long been discussed. The present study was conducted to determine the frequency of stress and anxiety and depression in the patients with alopecia areata in Yazd City in 2017.
Methods: This study was a cross-sectional study and 50 patients with alopecia areata in Yazd were compared with 50 in the control group in the year 2016. Sampling method was a census and variables, including sex, age, education level, duration of lesion, frequency of relapse, and location of the disease were collected and recorded using a questionnaire. The depression anxiety stress-scale (DASS) (Dass11) questionnaire was used for scoring anxiety, stress and depression. For analyzing the collected data were entered into SPSS version 13.
Results: The results of the study showed that the mean age of the participants in the study was 30.27 ± 8.7, the mean duration of lesion was 23.5±53.52 months and the mean recurrence rate was 1.4±2.2. From 100 participants in the study, 36 (36%) were women and 64 (64%) were men. The mean score of depression (6.8 vs 4.6), anxiety score (6.08 vs 3.5) and stress score (10.06 vs 8.06) were found to be significantly different between the two groups. Also, in women and in the age range of 17-29 years, the mean of depression and anxiety scores was significantly different in the two groups (P-value <0.05).
Conclusion: According to results, it can be concluded that the frequency of depression, anxiety and stress in the patients with alopecia areata is significantly more than the control group.
Prescribers’ perceptions of benefits and limitations of direct acting oral anticoagulants in non-valvular atrial fibrillation
Authors: Generalova Daria , Cunningham Scott , Leslie Stephen J. , Rushworth Gordon F. , McIver Laura , Stewart Derek
Published: June 2020

Background: There is an acknowledged lack of robust and rigorous research focusing on the perspectives of those prescribing direct acting oral anticoagulants (DOACs) for non-valvular atrial fibrillation (AF).

Objective: The objective was to describe prescribers’ experiences of using DOACs in the management of non-valvular AF, including perceptions of benefits and limitations.

Methods: A cross-sectional survey of prescribers in a remote and rural area of Scotland. Among other items, the questionnaire invited free-text description of positive and negative experiences of DOACs, and benefits and limitations. Responses were independently analysed by two researchers using a summative content analysis approach. This involved counting and comparison, via keywords and content, followed by interpretation and coding of the underlying context into themes.

Results: One hundred and fifty-four responses were received, 120 (77.9%) from physicians, 18 (11.7%) from nurse prescribers and 10 (6.4%) from pharmacist prescribers (6 unidentified professions). Not having to monitor INR was the most cited benefit, particularly for prescribers and patients in remote and rural settings, followed by potentially improved patient adherence. These benefits were reflected in respondents’ descriptions of positive experiences and patient feedback. The main limitations were the lack of reversal agents, cost and inability to monitor anticoagulation status. Many described their experiences of adverse effects of DOACs including fatal and non-fatal bleeding, and upper gastrointestinal disturbances.

Conclusions: While prescribers have positive experiences and perceive benefits of DOACs, issues such as adverse effects and inability to monitor anticoagulation status merit further monitoring and investigation. These issues are particularly relevant given the trajectory of increased prescribing of DOACs.
More Than Words: Outlining Preconditions to Collaboration Among First Nations, the Federal Government, and the Provincial Government
Authors: Lachance Nathalie , Rose Teresa
Published: June 2020

Since 2015, there has been heightened interest in reconciliation and renewed relationships with Indigenous Peoples. Anchoring our work in the definition of reconciliation provided by the Truth and Reconciliation Commission of Canada, we, as practitioner-scholars, sought to better understand the preconditions to collaboration among First Nations, the federal government, and the provincial government in Alberta. This participatory action research was conducted with mid- to senior-level public servants, who were involved in the further development and implementation of the 2014 Joint Action Plan to Improve the Health of First Nations in Alberta, in either First Nations, the federal government, or the provincial government. This article concludes that collaboration must consider the negative legacy of relationships between First Nations and federal and provincial governments, as well as between First Nations and settlers.
A comprehensive study on electrospinning of poly (vinyl alcohol): effects of the TCD, applied voltage, flow rate, and solution concentration
Authors: ACİK Gokhan
Published: June 2020

In the present work, the electrospun fibers of poly (vinyl alcohol) (PVA) are fabricated from its solution in water under ambient conditions, and the effect of altered working parameters used such as tip‐to‐collector distance (TCD), applied voltage, flow rate and solution concentration on the average diameter and frequency distribution of them is deeply discussed. The mean electrospun PVA fiber diameters and its distributions are estimated by combination of Scanning electron microscope (SEM) and ImageJ analyzer program which is extensively utilized in respective sciences. The achieved results from the experiments indicate that higher both TCD and applied voltage used decrease the average electrospun PVA fiber diameter. Conversely, when the flow rate or solution concentration is increased, diameters of achieved fibers are soared. It is anticipated that this comprehensive study will be beneficial to academia and industry worked on potential PVA fiber applications.
EKSISTENSI BAHASA DALAM KOMUNIKASI INTERPERSONAL: SEBUAH PENDEKATAN INTERDISIPLINER [LANGUAGE EXISTENCE IN INTERPERSONAL COMMUNICATION: AN INTERDICIPLINARY APPROACH]
Authors: Purwanti Christina
Published: June 2020

Language is very important in communication since it is the main means to deliver a message. A message can be effectively communicated if both speakers and listeners use a comprensible language. The purpose of this paper is to describe the existence of language in communication by using an interdisciplinary approach. 

BAHASA INDONESIA ABSTRACT: Bahasa sangat penting dalam komunikasi karena merupakan alat utama untuk menyampaikan sebuah pesan. Pesan yang disampaikan dalam komunikasi akan efektif bila menggunakan bahasa yang dimengerti dan dipahami baik oleh komunikator maupun komunikan. Tujuan penulisan ini untuk mendeskripsikan eksistensi bahasa dalam komunikasi dengan menggunakan pendekatan interdisipliner.