cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Djoni Hatidja
Contact Email
dhatidja@unsrat.ac.id
Phone
+628124442829
Journal Mail Official
dhatidja@unsrat.ac.id
Editorial Address
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Sam Ratulangi Jl. Kampus Kleak Manado 95115
Location
Kota manado,
Sulawesi utara
INDONESIA
Jurnal Ilmiah Sains
Published by Universitas Sam Ratulangi
ISSN : 14123770     EISSN : 25409840     DOI : https://doi.org/10.35799/jis.v22i2.40961
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Mathematics Physics
Jurnal Ilmiah Sains (Journal of Scientific Sciences) is the Journals Published by Faculty of Mathematics and Natural Sciences, Sam Ratulangi University. Jurnal Ilmiah Sains Published Twice a Year, i.e April and October. Jurnal Ilmiah Sains  welcomes full research articles in the area of Mathematics and Natural Sciences from the following subject areas: Mathematics Statistics Computer Science Physics Chemistry Biology
Arjuna Subject : Umum - Umum
Articles 345 Documents
 1   2   3   4   5 
PEMODELAN PENYEBARAN POLUTAN DI UDARA DENGAN SOLUSI PERSAMAAN DIFUSI ADVEKTIF Handy I. R. Mosey
JURNAL ILMIAH SAINS Volume 11 Nomor 1, April 2011
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (339.611 KB) | DOI: 10.35799/jis.11.1.2011.43

Abstract

ABSTRAKTelah dimodelkan penyebaran konsentrasi polutan di udara akibat emisi pabrik melalui persamaan difusi advektif. Sebagai syarat batas, polutan dianggap berasal dari suatu sumber titik dan penyebaran konsentrasinya dipengaruhi oleh stabilitas atmosfir. Selanjtunya, model diselesaikan dengan bahasa pemrograman MATLAB. Pada kondisi atmosfir stabil, polutan terkonsentrasi pada daerah dengan jarak 27-28 kilometer dari sumber polutan dengan nilai konsentrasi sebesar 3,1 mg/m3. Sedangkan pada kondisi atmosfir netral, konsentrasi polutan maksimum berada pada jarak 2,1 kilometer dari sumber dengan nilai 11 mg/m3. Pada kondisi atmosfir labil, konsentrasi polutan berada pada daerah yang cukup dekat dengan sumber, yaitu 0,6 kilometer dengan nilai 14,55 mg/m3. MODELING OF AIRBORNE-POLLUTANT SPREADING USING THE SOLUTION OF ADVECTIVE-DIFFUSION EQUATIONABSTRACTThe spreading of airbone-pollutant concentration that was resulted from factory effluent was modelled using advective-diffusion equation. In this modelling, it was considered that airbone-pollutant was resulted from a stationary point source and its spreading was affected by atmospheric stability. Model was completed by MATLAB programming. When atmosphere was stable, the pollutant was concentrated at 27-28 km distance from the source concentration 3,1 mg/m3. The maximum concentration of pollutant was 11 mg/m3 at 2,1 km distance under neutral atmosphere condition. The pollutant was concentrated at 0,6 km with magnitude 14,55 mg/m3 if the atmosphere was unstable.
AN APPLICATION PROGRAM TO ANALYZE EQUILIBRIUM pH USING VB.NET Harry S. J. Koleangan
JURNAL ILMIAH SAINS Volume 11 Nomor 1, April 2011
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (364.977 KB) | DOI: 10.35799/jis.11.1.2011.44

Abstract

An application program to analyze equilibrium pH of an anaerobic waste solution model had been developed. The equilibrium pH was analyzed using bisection method written in VB.NET 2008 Express Edition program language. Application of the program on the secondary data showed that pH of an anaerobic waste solution was 6.56. PROGRAM APLIKASI UNTUK MENGANALISA KESEIMBANGANpH MENGGUNAKAN VB.NETABSTRAKTelah dilakukan penelitian untuk membuat sebuah program aplikasi dalam menganalisis keseimbangan pH dari model sampah anaerob. Keseimbangan pH dianalisis menggunakan metode biseksi dengan bahasa pemrograman VB.NET 2008. Penerapan program pada data sekunder menunjukkan bahwa pH dari sampah anaerob adalah 6,56.
PERHITUNGAN ALIRAN ANGIN PADA VENTILASI BANGUNAN MENGGUNAKAN SIMULASI NUMERIK Kussoy John Wailan
JURNAL ILMIAH SAINS Volume 11 Nomor 1, April 2011
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (286.88 KB) | DOI: 10.35799/jis.11.1.2011.45

Abstract

Studi ini membahas penggunaan teknik simulasi numerik untuk memprediksi pola aliran dan kecepatan angin serta kenyamanan penghuni dalam sebuah ruang pada bangunan type sederhana. Hipotesisi yang diuji ialah luas bukaan jendela pada bangunan yang berfungsi sebagi ventilasi aliran angin yang mempengaruhi kenyamanan manusia di dalam ruang. Metode perhitungan menggunakan simulasi piranti lunak “Ventila” dan “TRNSYS”. Hasil studi menunjukkan bahwa luas bukaan ventilasi sebesar 4 m2 pada ruangan 18 m2 menghasilkan kecepatan angin yang menurunkan kenyamanan penghuni. THE CALCULATION OF WIND FLOW ON BUILDING VENTILATIONUSING NUMERIC SIMULATIONABSTRACTNumeric simulation technique (Software “Ventila” and “TRSYS”) was used to predict the flow pattern and speed of the wind as well as occupant pleasure in a room of small house. It was hypothesized that the area of opened window whose function as ventilation of wind flow influenced occupant pleasure in a room. The result of study showed that 4 m2 ventilation in 18 m2 room resulted in wind speed that decreased occupant pleasure.
PENENTUAN LINTASAN TERPENDEK DARI FMIPA KE REKTORAT DAN FAKULTAS LAIN DI UNSRAT MANADO MENGGUNAKAN ALGORITMA DJIKSTRA Deiby T. Salaki
JURNAL ILMIAH SAINS Volume 11 Nomor 1, April 2011
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (542.093 KB) | DOI: 10.35799/jis.11.1.2011.46

Abstract

Universitas Sam Ratulangi Manado adalah salah satu perguruan tinggi di Sulawesi Utara yang terdiri atas 11 fakultas dan satu gedung rektorat. Setiap fakultas dan rektorat terhubung dengan fasilitas jalan raya. Secara matematis kondisi seperti ini dapat direpresentasikan sebagai sebuah graf yang bisa diterapkan untuk mencari lintasan terpendek. Pada penelitian ini akan dicari lintasan terpendek dari FMIPA ke rektorat dan fakultas lainnya. Dengan menggunakan algoritma Djikstra, lintasan terpendek dari FMIPA diperoleh dengan memilih minimum lokal atau akses dengan jarak terdekat dari setiap lokasi yang kemudian digabungkan menjadi sebuah kumpulan lintasan dari satu lokasi ke lokasi lainnya dengan jarak terpendek. DETERMINATION OF SHORTEST PATH FROM FMIPA TO RECTORATE AND OTHER FACULTIES AT SAM RATULANGI UNIVERSITY USING DJIKSTRA ALGORITHMABSTRACTSam Ratulangi University is one of the colleges in North Sulawesi consisting of 11 faculties and one rectorate building. Every faculty and rectorate connected by highway facilities. Mathemathically this condition can be represented as an undirected weighted graph that can be applied to find the shortest path. By using the Djikstra algorithm, the shortest paths are obtained by setting the FMIPA as the initial vertex and then select the local minimum or access to the closest distance from each location, then combined the collection of path from one location to another with the shortest distance.
AUTOREPORT SISTEM INFORMASI DOKUMEN EVALUASI DIRI PROGRAM STUDI PADA PERGURUAN TINGGI Yonatan Parassa
JURNAL ILMIAH SAINS Volume 11 Nomor 1, April 2011
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (407.736 KB) | DOI: 10.35799/jis.11.1.2011.47

Abstract

Penelitian ini bertujuan membangun sistem informasi dokumen evaluasi diri yang mampu menyajikan data/informasi mengenai dokumen evaluasi diri program studi pada perguruan tinggi secara cepat dan akurat. Metode yang digunakan untuk membangun Sistem informasi dokumentasi evaluasi diri perguruan tinggi adalah metode air terjun. Perangkat lunak yang digunakan untuk membangun sistem ini adalah bahasa pemograman Borland Delphi 7.0. Hasil peneltian menunjukkan bahwa Autoreport sistem Informasi penyusunan dokumen evaluasi diri perguruan tinggi yang dibangun dapat menghasilkan dokumen evaluasi diri program studi yang lebih cepat dari sistem yang digunakan selama. Dengan sistem ini dapat memberikan kemudahan bagi pengelola program studi dalam mengambil keputusan. AUTOREPORT INFORMATION SYSTEM OF SELF-EVALUATION DOCUMENTS OF STUDY PROGRAM IN HIGHER EDUCATIONABSTRACTThe objective of the research was to develop information system of self-evaluation documents of higher education which could present the information concerning self-evalution documents of study program in the higher education quickly and accurately. The method used to develop information System of Self-Evaluation Documents of Higher Education was a water fall method. The sofware used to develop the was the programming language of Borland Delphi 7.0, MySQL Server, ODBC-5.1.6, and Crystal Report 7.0. The result of the research revelas that Autoreport of the information System of Self-Evaluation Documents of Higher Education develop can produce the self-evaluation documents of the the study program faster than the system used, so that it gives easiness for the study program management in making decision.
MODEL COMPOUNDS DALAM MENGHITUNG AGGREGATE LOSS Tohap Manurung
JURNAL ILMIAH SAINS Volume 11 Nomor 1, April 2011
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (229.145 KB) | DOI: 10.35799/jis.11.1.2011.48

Abstract

Penelitian ini bertujuan untuk menentukan taksiran distribusi aggregate loss. Dalam hal ini, aggregate loss merupakan total kerugian dalam periode satu tahun yang dialami oleh pemegang polis yang ditanggung suatu perusahaan asuransi. Dalam menentukan taksiran fungsi peluang aggregate loss, akan dibentuk model distribusi compound. Untuk menyelesaikan distribusi compound, ada beberapa metode yang digunakan antara lain metode Panjer Recursion, Fourier Inversion, dan Fast Fourier Transform. COMPOUNDS MODEL TO DETERMINE AGGREGATE LOSSABSTRACTThis study aims to determine the estimated aggregate loss distribution. In this case, the aggregate loss is a total loss within one year period experienced by the policyholder who paid an insurance company. In determining the estimated aggregate loss function , will be established distribution model compound. To determine the compound distribution, there are several methods used, namely, Panjer Recursion, Fourier Inversion, dan Fast Fourier Transform.
DESKRIPSI IKAN FAMILI MUGILIDAE DI LIMA MUARA SUNGAI DI SULAWESI UTARA Deidy Y. Katili
JURNAL ILMIAH SAINS Volume 11 Nomor 1, April 2011
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (373.346 KB) | DOI: 10.35799/jis.11.1.2011.49

Abstract

Deskripsi beberapa spesies ikan anggota Famili Mugilidae telah dilakukan di lima muara sungai di Sulawesi Utara. Penelitian ini bertujuan untuk mendeskripsikan, membandingkan aspek morfometrik dan meristik serta mengidentifikasi beberapa spesies ikan tersebut. Sampel ikan diambil dengan metode “appliance catch”, yaitu “coastal-throw net”. Hasil penelitian menunjukkan adanya 138 ikan yang terbagi dalam 6 spesies dan 4 genus. Spesies ikan yang diidentifikasi ialah . Liza parmata, L. vaigensis, L. macrolepis, Mugil cephalus, Valamugil connesius and Oedalechilus labiosus. DESCRIPTION OF MUGILIDAE FISH IN FIVE RIVER EUSTUARIESOF NORTH SULAWESIABSTRACTSome fish of Mugilidae family in five river eustuaries of North Sulawesi were described. The aims of this research were describe, compare morphometric as well as meristic aspects, and identity these fish species. The appliance catch (coastal and throw net) was used in fish semples. The results showed there were 138 fish that were classofoed as 6 species and 4 genus,i.e. Liza parmata, L. vaigensis, L. macrolepis, Mugil cephalus, Valamugil connesius and Oedalechilus labiosus.
PENGARUH ARUS LISTRIK DAN WAKTU PROSES TERHADAP KETEBALAN DAN MASSA LAPISAN YANG TERBENTUK PADA PROSES ELEKTROPLATING PELAT BAJA Daud Topayung
JURNAL ILMIAH SAINS Volume 11 Nomor 1, April 2011
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (531.941 KB) | DOI: 10.35799/jis.11.1.2011.50

Abstract

Penelitian menggunakan hukum Faraday untuk analisis teoritis dan metode statistik untuk analisis hasil pengukuran. Hasil teoritis, Ketebalan: Tmaks = 0.116461 mm, Tmin = 0.028423 mm. Massa: Mmaks = 5.2100 gr, Mmin = 1.3025 gr. Hasil pengukuran, Ketebalan: Tmaks = 0.109 mm, Tmin = 0.026 mm. Massa: Mmaks = 4.8516 gr, Mmin = 1.1902 gr. Ketebalan dan massa lapisan teoritis lebih besar dari hasil pengukuran. Perbedaan keduanya: Tmaks = 0.007 mm (6.12%), Tmin = 0.002 mm (7.35%), Mmaks = 0.3564 gr (6.88%), Mmin = 0.1123 gr (8.62%). Untuk hasil teoritis dan hasil pengukuran: Tmaks and Mmaks diperoleh pada arus listrik = 8 Ampere dan waktu proses 60 menit, Tmin dan Mmin diperoleh pada arus listrik = 4 Ampere dan waktu proses 30 menit. EFFECT OF ELECTRIC CURRENT AND PROCESS TIME THE THICKNESS AND MASS LAYER FORMED ON ELECTROPLATING PROCESSSTEEL PLATESABSTRACTResearch using Faraday's law for the theoretical analysis and statistical methods to analyze the results of measurements. Theoretical results, Thickness: Tmaks = 0.116461 mm, Tmin = 0.028423 mm. Mass: Mmaks = 5.2100 gr, Mmin = 1.3025 gr. Results of measurement, Thickness: Tmaks = 0.109 mm, Tmin = 0.026 mm. Mass: Mmaks = 4.8516 gr, Mmin = 1.1902 gr. Layer thickness and mass is theoretically greater than the measurement results. Differences both: Tmaks = 0.007 mm (6.12%), Tmin = 0.002 mm (7.35%), Mmaks = 0.3564 gr (6.88%), Mmin = 0.1123 gr (8.62%). For the theoretical results and measurements: Tmaks and Mmaks obtained at an electric current = 8 Amperes and 60 minutes, Tmin and Mmin obtained = 4 Amperes of electric current and 30 minutes
El-NINO DAN PENGARUHNYA TERHADAP CURAH HUJAN DI MANADO SULAWESI UTARA Seni Herlina J. Tongkukut
JURNAL ILMIAH SAINS Volume 11 Nomor 1, April 2011
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (411.598 KB) | DOI: 10.35799/jis.11.1.2011.51

Abstract

Telah dilakukan analisis El-Nino dan pengaruhnya terhadap curah hujan di Manado Sulut dengan menggunakan data curah hujan bulanan dan Southern Oscillation Index SOI selama thn 1999-2009. Data curah hujan diperoleh dari BMKG Kayuwatu Manado Sulut dan data SOI diunduh dari website Biro Meteorologi Australia BoM. Analisis dilakukan dengan analisis regresi linear sederhana. Diperoleh hasil bahwa curah hujan kota Manado secara umum dari thn 1999-2008 dipengaruhi oleh SOI namun pada thn 2009 ketika terjadi El-nino, curah hujan bulanan Manado tidak dipengaruhi oleh efek El-nino. Hal ini karena pada saat yang sama suhu muka laut perairan Indonesia juga menghangat. EL-NINO AND ITS EFFECT ON RAINFALL IN MANADONORTH SULAWESIABSTRACTAnalysis of El-Nino and its effect on rainfall in Manado, North Sulawesi, using monthly rainfall data and the Southern Oscillation Index SOI during the years 1999-2009 has been carried out. Rainfall data obtained from BMKG Kayuwatu Manado and SOI data downloaded from the website of Australian Bureau of Meteorology (BoM). The analysis was performed with simple linear regression analysis. The results obtained indicate that rainfall in Manado , in general, was influenced by SOI from the years 1999-2008, but when there is an El-Nino in 2009, monthly rainfall in Manado is not affected by the El-Nino effect. This is due to, at the same time, sea surface temperature in Indonesian territory are also warm.
OPTIMISASI PEMBAGIAN TUGAS KARYAWAN MENGGUNAKAN METODE HUNGARIAN Marline Paendong; Jantje D. Prang
JURNAL ILMIAH SAINS Volume 11 Nomor 1, April 2011
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (372.176 KB) | DOI: 10.35799/jis.11.1.2011.52

Abstract

Hal penting yang perlu dipertimbangkan dalam penugasan karyawan pada “Lia Fashion Komo Luar” adalah bagaimana kondisi penugasan agar kelebihan biaya produksi minimum sedangkan pada “Man Taylor” adalah bagaimana kondisi penugasan agar waktu produksi minimum. Dengan menggunakan metode Hungarian diperoleh hasil sebagai berikut: penugasan karyawan pada “Lia Fashion Komo Luar” agar kelebihan biaya produksi minimum adalah karyawan A ditugaskan menjahit seragam pramuka putri, karyawan B ditugaskan menjahit seragam SMA putri, dan karyawan C menjahit baju pegawai sedangkan pada “Man Taylor” agar waktu produksi minimum adalah karyawan A ditugaskan menjahit baju kebaya, karyawan C ditugaskan menjahit rok kebaya, karyawan D ditugaskan menjahit celana panjang, karyawan E ditugaskan menjahit rok pendek, karyawan F ditugaskan mejahit pakaian dinas harian (PDH), dan karyawan G ditugaskan menjahit baju kemeja. OPTIMIZATION OF DISTRIBUTION WORKER ASSIGNMENTUSING HUNGARIAN METHODABSTRACTThe Important point to be observe the worker assignment on “Lia Fashion Komo Luar” is how to condition of the assignment for minimum production cost advantages. While in “Man Taylor” is how the condition of the assignment for minimum production time. To simplify the assignment of these worker, there is a operation research method is the Assignment Problem using the Hungarian method. Assignment Problem is one case in the business world relating to the optimal assignment in which the number of worker equal to number of tasks to be done. Hungarian method is one technique for solving assignment problem consider the observation and problem formulation analysis afterwords by modifying the assignment table to the matrix of effectiveness in order to obtain optimal conditions. The results obtained by assignment of the right worker on the “Lia Fashion Komo Luar” for a minimum production cost advantage the worker A was assigned to sew scout uniform girls, worker B was assigned to sew school uniform girls, and worker C was assigned to sew officer clothes. While in “Man Taylor” for minimum production time the worker A was asiigned to sew kebaya clothes, worker C was assigned to sew kebaya skirt, worker D was assigned to sew trousers, worker E was assigned to sew short dress, worker F was assigned to sew PDH clothes, and worker G was assigned to sew shirt clothes.

Page 2 of 35 | Total Record : 345

 1   2   3   4   5 

Filter by Year

2007 2025


Reset
Filter By Issues
All Issue Volume 25 Issue 2, October 2025 Volume 25 Issue 1, April 2025 Volume 24 Issue 2, October 2024 Volume 24 Issue 1, April 2024 Volume 23 Nomor 2, Oktober 2023 Volume 23 Nomor 1, April 2023 Volume 22 Nomor 2, Oktober 2022 Volume 22 Nomor 1, April 2022 Volume 21 Nomor 2, Oktober 2021 Volume 21 Nomor 1, April 2021 Volume 20 Nomor 2, Oktober 2020 Volume 20 Nomor 1, April 2020 Volume 19 Nomor 2, Oktober 2019 Volume 19 Nomor 1, April 2019 Volume 18 Nomor 2, Oktober 2018 Volume 18 Nomor 1, April 2018 Volume 17 Nomor 2, Oktober 2017 Volume 17 Nomor 1, April 2017 Volume 16 Nomor 2, Oktober 2016 Volume 16 Nomor 1, April 2016 Volume 15 Nomor 2, Oktober 2015 Volume 15 Nomor 1, April 2015 Volume 14 Nomor 2, Oktober 2014 Volume 14 Nomor 1, April 2014 Volume 13 Nomor 2, Oktober 2013 Volume 13 Nomor 1, April 2013 Volume 12 Nomor 2, Oktober 2012 Volume 12 Nomor 1, April 2012 Volume 11 Nomor 2, Oktober 2011 Volume 11 Nomor 1, April 2011 Volume 9 Nomor 1, April 2009 Volune 8 Nomor 1, April 2008 Volume 7 Nomor 1, April 2007 More Issue