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Perancangan Sistem Pemanas Bearing Menggunakan Kontrol Pi Berbasis Mikrokontroler Atmega 8535 Sumardi, Sumardi; Setiawan, Iwan; Purwanto, Sigit
TRANSMISI Vol 10, No 1 (2008): TRANSMISI
Publisher : TRANSMISI

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Abstract

Bearing is an important component of motor and generator, bearing is used as a buffer component of shaft rotor that has function to decrease the friction between shaft rotor and housing. The damaging on a bearing can make an increasing of power consumption and a big friction that can make many vibrations and uproar in the motor or generator.Based on SKF’s research, 16% of the bearing’s initial damage is caused by the wrong assembling method. For example the installation of the bearing in the shaft is forcefully, by hits or burns them use the asetelin weld. The heating of bearing uses assetelin, isen’t good. Because the heat is not be stread evenly. So in order to get  heating is average in bearing, we use induction heat.This making final assignment is to make a bearing heater which use induction method with  digital PI control induction method. With Microcontroller ATmega 8535 as a digital code’s processor and as their controller. This instrument can raise the increasing linear temperature and the average heat. Beside that, the temperature of the heated bearing also can be kept on interval 80° - 90°C. With this instrument, the diameter of the heated bearing can expand, the heating is average and the bearing temperature can be controlled, so the bearing can be installed in the shaft rotor easily.Key Words: Bearing heater, PI control,  Microcontroller ATmega 8535
THE EFFECTIVENESS OF USING BRAINSTORMING STRATEGY TO THE STUDENTS’ WRITING ABILITY AT SMKN 1 KARANGANYAR KEBUMEN GRADE X IN THE ACADEMIC YEAR OF 2012/2013 purwanto, sigit
SCRIPTA - Pendidikan Bahasa Inggris Vol 2, No 3 (2013): English Research Aritcles
Publisher : Pendidikan Bahasa Inggris

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Abstract

This study is aimed at using Brainstorming Strategy to the students’ writing ability. First, to know what stages the researcher undergoes to hold the brainstorming strategy in the classroom of vocational school students. Second, to know how effective the use of brainstorming strategy in teaching writing to vocational high school students. Brainstorming is an informal way of generating topics to write about, or points to make about a topic. It can be done at any time during the writing process. There are four stages to hold Brainstorming Strategy. The stages are making a topic, making a list of words, narrowing the list of words and using the words as supporting details. The result of pre-test is 66.31 and the result of post-test is 69.61. Moreover, the result of t-test value is -2.236. The t-test value is lower than t-table. It means that using Brainstorming Strategy is effective. Keyword: the effectiveness, brainstorming strategy, writing ability
KAJIAN POTENSI DAN DAYA DUKUNG TAMAN WISATA ALAM BUKIT KELAM UNTUK STRATEGI PENGEMBANGAN EKOWISATA Purwanto, Sigit; Syaufina, Lailan; Gunawan, Andi
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 4, No 2 (2014): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Graduate School Bogor Agricultural University (SPs IPB)

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Abstract

It is believed that ecotourism can increase community welfare and natural resource sustainability. Ecoutourism development in Bukit Kelam natural tourism park (TWABK) need to be based on the function and carrying capacity of the area, so that it must be discovered the object potential and tourism attraction. The study aimed to: (1) identify and analyze the object potential and natural tourism attraction in TWABK; (2) analyze carrying capacity of TWABK for ecotourism development, (3) identify and analyze the stakeholders of TWABK; and (4) formulate the strategies of ecotourism development in TWABK. Analysis guide of ADO-ODTWA Dirjen PHKA 2003 is used to analyze the object potential and natural tourism attraction. The criteria of Physical Carrying Capacity (PCC), Real Carrying Capacity (RCC) and Efective Carrying Capacity (ECC) is used to analyze the carrying capacity of TWABK. Stakeholder Grid is used to analyze the stakeholders and the ecotourism development strategies of TWABK which formulated by using SWOT analysis. Some objects in TWABK are feasible for ecotourism development, which are: bukit Kelam landscape, Kelam ring road, climbing transect, the hill peak, the foothills area, the hillside, spiritual tourism of Maria cave and agro tourism. The ECC of TWABK area for ecoutourism is 196 persons/day, with slope correction factor, soil erosion sensitivity, landsape potential, climate and wildlife disturbance (swallow birds spawn season). The stakeholders of TWABK is divided into four categories, which are: the key players (the ministry of forestry, the ministry of tourism and creative economy, the agency of cultural and tourism of Sintang district, the agency of forestry and plantation of Sintang district and the community),the context setters (the NGOs), the crowd (private sectors) and the subjects (visitors, academics, and refill drinking water company). The ecotourism development strategy formulation of TWABK results 9 strategies, which are: area stabilization, management plan formulation, ecotourism development according to the potency and carrying capacity of the area, publication and promotion, protection of the area, management collaboration, environmental education and counseling, community development,and ecotourism impacts monitoring and evaluation. Keywords: carrying capacity, ecotourism, strategy
KAJI EKSPERIMENTAL BIOMASA SEKAM PADI PADA CYCLONE BURNER Purwanto, Sigit; Rohmat, Tri Agung
Prosiding Semnastek PROSIDING SEMNASTEK 2015
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Cyclone burner berbahan bakar sekam padi (rice husk) merupakan teknologi pembakaran langsung dengan memanfaatkan aliran pusar. Desain unit cyclone burner yang digunakan pada penelitian ini adalah skala lab dengan bahan bakar sekam padi berbentuk serbuk. Penelitian ini juga mempelajari tentang pengaruh variasi ukuran partikel biomasa, laju aliran biomasa, dan laju aliran udara terhadap temperatur pembakaran di dalam ruang pembakaran cyclone burner. Proses persiapan bahan bakar sekam padi untuk mendapatkan variasi ukuran partikel di dalam penelitian ini meliputi beberapa tahap yaitu  proses pengeringan, reduksi ukuran partikel dan pengayakan. Proses pembakaran dan proses pencampuran antara bahan bakar dengan udara berlangsung secara bersamaan di dalam ruang pembakaran cyclone burner. Pengamatan distribusi temperatur pembakaran menggunakan termokopel yang dipasang sebanyak 3 (tiga) titik ke arah aksial dan radial. Hasil pengujian menunjukkan bahwa ukuran partikel bahan bakar yang semakin kecil menghasilkan temperatur pembakaran lebih optimum hingga mencapai temperatur 858 0C pada AFR 8,37. 
PROTOTYPE SEDERHANA ALAT MONITORING ALIRAN DARAH NAIK KE SELANG INFUS A SIMPLE PROTOTYPE BLOOD FLOW MONITORING TOOL GOES UP TO THE INFUSION HOSE Ulfa, Hartina; Purwanto, Sigit; Hikayati, Hikayati
Jurnal Keperawatan Sriwijaya Vol 6, No 1 (2019)
Publisher : Universitas Sriwijaya

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Abstract

Tujuan: Naiknya aliran darah ke selang infus masih menjadi masalah utama dalam pemantauan cairan infus. Darah tersebut akan membentuk bekuan darah (blood clotting) jika terlambat diketahui dan dapat berdampak serius bagi pasien dikemudian hari, sehingga sangat dibutuhkan suatu teknologi alat yang dapat membantu kerja perawat dalam memantau naiknya darah ke selang infus. Penelitian ini bertujuan untuk mengembangkan prototype sederhana alat monitoring aliran darah naik ke selang infus. Metode: Penelitian dilakukan dalam dua tahap pelaksanaan, yaitu tahap pembuatan alat dan pengujian alat. Alat ini dilengkapi dengan rangkaian sensor LDR sebagai pendeteksi naiknya darah ke selang infus. Hasil: Hasil baca sensor alat ini berupa tanda peringatan dengan adanya bunyi alarm dan lampu LED merah menyala. Alat ini terbukti efektif dalam membaca kondisi cairan infus dengan rata-rata waktu mendeteksi yaitu 0,77 detik saat darah naik ke selang infus. Kata kunci : Alat monitoring; darah; selang infus
Tumor Necrosis Factor-α sebagai Prediktor Terjadinya Anemia pada Ibu Hamil di Wilayah Endemis Malaria Flora, Rostika; Mukni, Mukni; Girsang, Bina Melvia; Purwanto, Sigit
Jurnal Kesehatan Masyarakat Nasional Vol. 9 No. 3 Februari 2015
Publisher : Faculty of Public Health Universitas Indonesia

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Abstract

Ibu hamil yang berada di daerah endemis malaria sangat rentan terhadap infeksi malaria selama kehamilan. Gejala malaria pada kelompok ini sering asimptomatik atau bahkan tidak terdeteksi sama sekali karena adanya efek imunitas protektif melalui infeksi yang berulang. Adanya peningkatan kadar tumor necrosis factor-alpha (TNF-α) dapat dijadikan indikator terjadinya infeksi malaria. TNF-α berperan penting dalam respons imun pada malaria akut yang menghambat terjadinya eritropoesis. Penelitian ini bertujuan untuk mengetahui hubungan antara kadar TNF-α dengan kejadian anemia pada ibu hamil didaerah endemik malaria vivax. Penelitian ini menggunakan desain potong lintang, dilakukan pada bulan Januari - Februari 2014 di lima wilayah kerja puskesmas Kota Bengkulu. Sampel penelitian adalah ibu hamil di daerah endemis malaria vivax yang diambil secara accidental sampling. Dilakukan pengambilan darah untuk pemeriksaan mikroskopis malaria, kadar TNF-α dan kadar hemoglobin (Hb). Hasil penelitian menunjukkan seluruh ibu hamil memiliki riwayat pernah terinfeksi malaria vivax, walaupun hasil pemeriksaan slide negatif. Terjadi peningkatan kadar TNF- α dengan rerata 6,90 ± 2,48 pg/mL dan penurunan kadar Hb dengan rerata 9,75 ± 0,88 g%. Uji korelasi Spearman didapatkan korelasi negatif yang kuat (r = -0,734) dan bermakna (nilai p < 0,05) antara Kadar TNF-α dengan kadar Hb. Terdapat hubungan yang bermakna antara kadar TNF-α dengan kejadian anemia.Tumor Necrosis Factor-α as Predictor of Anemia Occurrence among Pregnant Mothers in Malaria-Endemic AreasPregnant mothers living in malaria - endemic area are very susceptible to malaria infection during pregnancy. Malaria symptoms in this group are often asymptomatic or even not detected at all due to protective immunity effect through repeated infections. Any elevation of tumor necrosis factor-alpha (TNF-α) level can be used as indicator of malaria infection. TNF-α takes an important role in immune response on acute malaria that hinders occurence eritropoesis process. This study aimed to find out relations between TNF-α level and anemia occurrence among pregnant women living in malaria vivax - endemic areas. The study used cross-sectional design conducted on January to February 2014 in five working areas in Bengkulu city. Sample of study was pregnant mothers in malaria vivax - endemic areas which was taken through accidental sampling. Blood was taken for malaria-microscopic examination, TNF-α and haemoglobine (Hb) level. The results showed that all of pregnant mothers have malaria vivax - infected record, although slide examination showed negative result. Any TNF-α level elevation with average 6.90 ± 2.48 pg/mL and decrease of Hb level with average 9.75 ± 0.88 g%. Spearman correlation test showed strong negative correlation (r = -0.734) and significant (p value < 0.05) between TNF-α level and Hb level. There was significant relation between TNF-α level and anemia occurrence.
Uji Aktivitas Antibakteri Fraksi Aktif Ekstrak Daun Senggani (Melastoma malabathricum L) terhadap Escherichia coli Purwanto, Sigit
Jurnal Keperawatan Sriwijaya Vol 2, No 2 (2015)
Publisher : universitas sriwijaya

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Abstract

Tujuan: Daun Senggani (Melastoma malabathricum L.) merupakan salah satu dari tanaman obat yang dipergunakan untuk mengobati beberapa penyakit, salah satunya diare yang masih menjadi penyakit endemic di Indonesia.   Metode: Penelitian eksperimental secara in vitro yang dilakukan di Laboratorium Bersama Pasca Sarjana Universitas Sriwijaya untuk menginvestigasi kemampuan antibakteri dari daun senggani terhadap Escherichia coli ATCC 25922 dibandingkan dengan ciprofloxacin sebagai control positif.   Hasil: Fraksi Etil Asetat dan methanol dari daun senggani mempunyai aktivitas antibakteri terhadap Escherichia coli dengan masing-masing nilai Konsentrasi Hambat Minimum pada 250 µg/ml and 1000 µg/ml.   Simpulan: Fraksi aktif ekstrak daun senggani mempunyai kemampuan antibakteri terhadap Escherichia coli dalam media agar.   Kata Kunci: Ddaun senggani, Escherichia coli, antibakteri
DETERMINANT FACTORS CORRELATE TO MYOPIA Purwanto, Sigit
Jurnal Ilmu Kesehatan Masyarakat Vol 1, No 3 (2010): Jurnal Ilmu Kesehatan Masyarakat
Publisher : Faculty of Public Health Universitas Sriwijaya

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Abstract

Background: Myopia is the most common refractive error and easily correctable with optical devices. Myopia has been roughly classfied by degree of severity. Low myopia usually describes myopia of 3 diopters or less. Medium myopia usually describes myopia between >3 and 6 diopters. High myopia usually describes myopia of more than 6 diopters. The global prevalence of refractive errors has been estimated from 800 million to 2.3 billion. The incidence of myopia within sampled population often varies with age, country, sex, race, ethnicity, occupation, habits, environment, and other factors. The aim of this research is to know the correlation between determinant factors with myopia. This study used questionnaire of 14 questions as instruments. Method: This research is an cross sectional observational research with dependent variables are genetic, habits, environment, parents salary and the father’s educationr. The independent variable is the classification of myopia. The respondent in this research is 59 student of senior high school2 in Palembang. Univariat and bivariat analysis were performed by Chi-Square (X2). Result : There are a total of 59 students participated in this study. From the statistic experiment using Chi Square (α < 0,05 ), environment (p value=0.031), habits (p value= 0,018), have associated with students myopia. There aren’t correlation between genetic( p value:0,347), father’s education (p value= 0,088), and for parents income (p value: 0,145) with myopia. Conclussion: determinant factors correlate to myopia are environment factor and habits factor Key Word: Myopia, refractive, lens, cornea, glasses 
MONITORING INFUS BERDASARKAN WAKTU TETESAN Purwanto, Sigit; Mulya, Megah; Sembiring, Sumaryanta

Publisher : Seminar Nasional Keperawatan

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Abstract

Pentingnya kebutuhan cairan bagi tubuh memerlukan kemampuan perawat untuk menjaga akurasi dan keajegkannya.Upaya yang dapat dilakukan untuk mengeliminir hal tersebut dengan rekayasa alat untuk mendeteksi cairan infus. Tujuan penelitian ini adalah mengembangkan alat untuk memonitor laju tetesan infus secara real timeberdasarkan waktu dan berat cairan infus. Garis besar metode penelitian ini diawali dengan identifikasi masalah, perancangan hardware dan software, diakhiri dengan validasi dan analis data. Hasil penelitian ini berupa detektor infus yang mampu mendeteksi laju tetesan infus dari 10 hingga 90 tetes/menit dengan rata-rata error berkisar 1 – 6 %. Adapun volume tetesan infus setiap 0,05 ml untuk setiap variasi laju tetesan infus dari variasi percobaan mulai 10,8 sampai dengan 48,8 tetes/menit. Masih diperlukan penyempurnaan dan potensi terjadinya interkoneksi dengan komputer pusat di ruang rawat agar memudahkan dan mempecepat penanganan bila sewaktu-waktu terjadi masalah dalam pemberian terapi infus.
EXCESSIVE DAYTIME SLEEPINESS (EDS) PADA PASIEN DENGAN PENYAKIT KRONIS Andhini, Dhona; Y, Eka Yulia Fitri; Purwanto, Sigit
Proceeding Seminar Nasional Keperawatan Vol 3, No 1 (2017): Proceeding Seminar Nasional Keperawatan 2017
Publisher : Proceeding Seminar Nasional Keperawatan

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Abstract

Penyakit kronis adalah suatu penyakit menahun yang dapat berlangsung lama dan fatal, penyakit ini diasosiasikan dengan kerusakan atau penurunan fungsi fisik dan mental yang berkepanjangan dan jarang sembuh. Penyakit kronis akan menyebabkan berbagai masalah seperti masalah medis, sosial dan psikologis. Keluhan tentang gangguan tidur dan excessive daytime sleepiness adalah hal yang sering dialami dikalangan pasien dengan penyakit kronis dengan prevalensi yang cukup tinggi. Penelitian ini bertujuan untuk mengetahui kejadian excessive daytime sleepiness (EDS) pada pasien dengan penyakit kronis. Penelitian ini adalah penelitian cross sectional yang menggunakan metode deskriptif analitik dengan besar sampel 76 pasien dengan penyakit kronis. Sebanyak 31.6% pasien dengan penyakit kronis mengalami excessive daytime sleepiness (EDS). Angka kejadian excessive daytime sleepiness pada pasien dengan penyakit kronis tergolong cukup tinggi yaitu sebesar 31.6%.