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SCIENCE TECH: Jurnal Ilmiah Ilmu Pengetahuan dan Teknologi

sciencetech
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Published by Universitas Sarjanawiyata Tamansiswa

ISSN : 24606286 EISSN : 25793624 DOI : 10.30738/science tech.v2i1.396

Core Subject : Science, Agriculture, Engineering,

Agriculture, Biological Sciences & Forestry Chemistry Computer Science & IT Engineering Materials Science & Nanotechnology

Jurnal SCIENCE TECH adalah jurnal yang diterbitkan oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat (LP2M) Universitas Sarjanawiyata Tamansiswa (UST) Yogyakarta. Jurnal ini diharapkan sebagai media bagi dosen, peneliti, praktisi, mahasiswa dan masyarakat luas yang memiliki perhatian terhadap bidang dan perkembangan ilnu pengetahuan dan teknologi. Jurnal SCIENCE TECH terbit dua kali setahun yaitu Januari dan Agustus, setiap terbit 8 artikel.

Arjuna Subject : Umum - Umum

Articles 107 Documents

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GEOMETRI ANALITIK BIDANG PADA KOORDINAT MIRING Zainnur Wijayanto; Kusmanto kusmanto
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 2 No 2 (2016): Agustus
Publisher : Universitas Sarjanawiyata Tamansiswa

The aim of this study was to determine (1) the shape and properties of any of the lines in the coordinate oblique, (2) the shape and properties of any of the circles on the coordinate oblique, (3) the shape and properties of any of parabola in oblique coordinates, (4) the shape and properties of any of the ellipse in oblique coordinates, (5) the shape and properties of any of the hyperbole in oblique coordinates.The method to be used is a literature review to collaborate with existing theories.The results showed that the equation of the line through p1=(x1-y1)Â and Â p2=(x2-y2)Â at oblique coordinate Â a becomes = y-y1 =mr(x-x1) with mr=tan (180-a) B mr=(y2-y1)/(x2-x1)

PENGARUH VARIASI FRAKSI VOLUME KOMPOSIT SERAT E-GLASS Â±45Â° POLYESTER 157 BQTN TERHADAP KEKUATAN BENDING DAN GESER Istyawan Priyahapsara; Izza Rizky Assihhaly
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 3 No 2 (2017): Agustus
Publisher : Universitas Sarjanawiyata Tamansiswa

Demand of composite as aeronatics material is incresing. Itâ€™s light weight, high specific strength, are become a favour of research. Fiber volume Fraction (FVF) is one of important factor on making of composite. The volume ratio between FVF and the resin is affecting its mechanical properties. In this reaserach there were three ratio varation between fiber and the resin. Bending and shear test were conducted through out this research. Results show that, the ductility increased due to the increased of its ratio, but itâ€™s shear stressare decresed.

ANALISIS KEMAMPUAN PEMECAHAN MASALAH MATEMATIS SISWA TINGKAT SEKOLAH DASAR DI KOTAMADYA YOGYAKARTA Trisniawati Trisniawati
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 3 No 1 (2017): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

This study aims to describe the attainment of mathematical problem solving ability among elementary school students in Yogyakarta Municipality and to describe errors that they make in answering the items in the test of mathematical problem solving ability. This was a qualitative and case study research. The research population comprised all elementary school students in Yogyakarta Municipality. Then, 3 elementary schools in Yogyakarta Municipality were randomly selected based on upper, middle, and lower ranks, namely SD Negeri Ungaran Yogyakarta, SD Bina Anak Sholeh Yogyakarta, and SD Negeri Karanganyar Yogyakarta. The study was carried out in Grade V in November 2015. The research instruments were a test of mathematical problem solving ability and an interview guide. Based on the data from the test of mathematical problem solving ability, interviews were conducted by involving 5 students from each elementary school. The results of the study show that the mathematical problem solving ability among elementary school students in Yogyakarta Municipality is still low, namely less than 68. Their mathematical problem solving ability at the stage of understanding a problem is 52.37%, at the stage of planning to solve a problem it is 29.091%, at the stage of solving a problem it is 23.09%, and at finding out an alternative it is 8.88%. The results indicate that many students have not attained the stage of rechecking by finding out an alternative way (solution). The errors that the students often make include inaccurate data, inaccurate procedures, unavailable conclusions, skill hierarchy problems, and indirect manipulations

KUAT LENTUR PANEL PARTISI DARI LIMBAH STYROFOAM YANG DILAPISI KAWAT LOKET Dewi Sulistyorini
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 1 No 1 (2015): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

The room is one element in a building. So, we need a wall or divider as a separator between the room. Partition wall was designed as a temporary partition wall and without the loaded. Building materialsÂ must have some advantages such as light weight, durability, shape can suit the needs, the speed of the construction, low cost and environmental friendly. Such materials like Styrofoam or expanded polysterene (EPS), which is an insulator lightweight material, rigid and made from plastic materials. Partition panel research of styrofoam waste coated wiremeshÂ is an attempt to determine the potential use of styrofoam wasteÂ as a partition panel that reviewed material from the unit weight and flexural strength. Test specimen for 3 (three) pieces of panels with dimension 80 cm long, 30 cm wide, 1 cm thick, with compression 2 MPa and water-cement factor 0.45. The weight of used cement 250 kg / m3, wiremesh diameter of 0.6 mm with grid 6 mm x 6 mm. The test results obtained average unit weight for panel was 1081.9 kg / m3 and average flexural strength of 0.721 MPa. The pattern of the damage indicated by the curved wiremesh prior to the loading position, and then styrofoam concrete cracks

ANALISA PENGENDALIAN KUALITAS PRODUK COVER MOTOR PADA PT. ABC MENGGUNAKAN METODE BORDA DAN KAIZEN Elly Wuryaningtyas Yunitasari; Emmy Nurhayati
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 2 No 1 (2016): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

This research generally aims to describe the effects of civic learning in nurturing studentsâ€™ political literacy, and specifically aims to examine and discover the effects of civic components application that consist of civic learning and competences on the level of studentsâ€™ political literacy. This research used quantitative approach and descriptive method of survey technique. From the research results, it could be generally concluded that: (1) civic learning through various democratic learning methods strengthened the effects of civic education in nurturing studentsâ€™ political literacy, (2) the better quality of studentsâ€™ civic competences the higher their level of political literacy, and (3) an effective and meaningful civic competences could directly improve studentsâ€™ political literacy

PENDEKATAN LEAN SIX SIGMA DAN TAGUCHI UNTUK MENGATASI MASALAH PENGEMASAN DAN PEMASARAN PRODUK WEDANG UWUH INSTAN SRUPUT Elly Wuryaningtyas Yunitasari; Emmy Nurhayati
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 3 No 2 (2017): Agustus
Publisher : Universitas Sarjanawiyata Tamansiswa

Wedang Uwuh Instan Sruput is one of the business unit of Industrial Engineering Program, Faculty of Engineering, Universitas Sarjanawiyata Tamansiswa Yogyakarta. Wedang Uwuh Sruput is an innovative manufacture of wedang uwuh into instant from the original form of whole and raw spices. The resulting product results sometimes have different quality/taste in each production process. The purpose of this research is to improve product quality of Wedang Uwuh Instan Sruput, improve the composition of herb wedang uwuh product, improve the concept of packaging and improve the marketing of the wedang uwuh products. The object of this research is Wedang Uwuh Sruput Prodi Teknik Industri UST. The materials used are instant wedang uwuh maker such as ginger, clove leaf, cinnamon leaf, secang wood, cloves, lemongrass, sugar and water. Identification is done on factors that affect product quality in order to create the same product in the market. The experiment was conducted by performing several times of Wedang Uwuh Sruput production with several variations of composition/formula using Taguchi method to maintain product consistency and quality. In this experiment there are 4 factors(sugar,ginger,water and secang)with 3 level design,that is 2,8 kg;2.9 kg and 3.0 kg for sugar,1.0 kg;1.2 kg and 1.4 kg for ginger,water is 5.0 L;5.2 L and 5.4 L,while the secang is 200 gr,210 gr,220 gr. The difference of the output of Wedang Uwuh Sruput is caused by the difference of sugar content, the difference of ginger content, the difference of the amount of water and the difference of the number of secang used, the use of different raw material specification, the length of production process is not same and the production process is still manual. The result shows that Waste which has the highest weight is waiting with the value of 0.252 at rank 31. Then the calculation of sigma value at early check is at the level of 3,001 sigma and final check at 2,455 sigma level. From the calculation of sigma level can be seen that the level of quality in Business Unit Wedang Uwuh "Sruput" is still far from lean six sigma target. Therefore, the advice given to the Business Unit Wedang Uwuh "Sruput" in the form of corrective actions that have been analyzed in this study. It was found that the most appropriate composition based on consumer preferences was Sugar 2.9 kg;Ginger 1.4;Water 5 L; and Wood Secang 200 gr.

PERANCANGAN SISTEM PENDUKUNG KEPUTUSAN UNTUK PEMILIHAN PEMASOK NATA DE COCO DI PT. XZY Dian Eko Hari Purnomo
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 2 No 2 (2016): Agustus
Publisher : Universitas Sarjanawiyata Tamansiswa

PT. XYZ is a manufacturing company that produces nata de coco pieces. Consumers of the product nata de coco pieces of food businesses such as food PT.Garuda Sidoarjo, PT. Holy Sinar Mas, PT. Borobudur Semarang and others. PT. XYZ has two types of contract supplier and the supplier is not a contract. Currently, the company in the selection of suppliers do not contract into supplier contracts sometimes have trouble. Terebut difficulties occurred because of the detailed criteria that can be used for the selection of suppliers. So in this study will berusahaan find criteria that influence supplier selection. The data in this study using the method Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). In addition, models that have been made will be implemented into a Decision Support System (DSS). The criteria that can mempengeruhi supplier selection is the sum total, the number of total quality one, a total of two quality, the total number of nata broken, the number of deliveries the maximum, the maximum number of quality one, the maximum number of two qualities, the maximum amount is broken, the number of deliveries at a minimum, the number of minimum quality one, the minimum number two quality, the minimum amount is broken, regularity, quality price and the price of the quality of the two. In addition, based on test results Decision Support System (DSS), which has made the conclusion that the system that has been created can be used later by PT. XYZ.

PENINGKATAN PERFORMA SEPEDA MOTOR DENGAN VARIASI CDI PROGRAMMABLE THE IMPROVEMENT OF MOTORCYCLES PERFORMANCE USING CDI PROGRAMMABLE Ibnu Siswanto; Yosep Efendi
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 1 No 1 (2015): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

The study aims to determine the engine performance characteristics of motorcycle that use CDI genuine and CDI programmable, and differences in performance characteristics of motorcycle engine that uses the CDI genuine and CDIÂ programmable. The study method used was experimental. The object of study was motorcycle 1 cylinder 125 cc. The equipment used to perform power measurement was dynotest motorcycle vehicle. Experiments conducted with the motorcycle still conditions in accordance with standard factory (no modification). The results showed that (1) Motorcycles with CDI Genuine produces the highest power 8HP obtained at 6542 RPM and the highest was 10.12 NM torque at 5085. While the RPM after it was replaced with CDI Programmable, peak power of 8.2 at 6556 RPM and torque of 10.33 in 4670. (2) ThereÂ was a difference in engine performance using CDI genuine and CDI Programmable. The highest power achieved in almost all variations of CDI Programmable, amounting 8,2HP. The highest torque was obtained by advancing the CDI Programmable Timing 2 degrees, itÂ 10,33Nm at 4670 RPM

PENERAPAN TEOREMA BINOMIAL UNTUK MENENTUKAN PELUANG KEJADIAN (KASUS :PERCOBAAN PELEMPARAN KOIN TAK SEIMBANG) Istiqomah Istiqomah
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 2 No 2 (2016): Agustus
Publisher : Universitas Sarjanawiyata Tamansiswa

Study on trial coins and dice unbalanced still rare. This resulted in the students find it difficult when faced with the problem experiment coin toss and dice made in such a way that it becomes unbalanced. Actual trial coin toss and dice are balanced or unbalanced have the same pattern. For example in terms of determining the number of sample points, where the pattern is formulated as apn where p is the number of comparisons. Calculating the sample points and calculate the probability of the occurrence of an experiment throwing a coin or dice are balanced relatively easier than calculate the sample points and calculate the probability of occurrence of throwing a coin or dice experiment that is not balanced. Binomial Theorem extremely helpful in calculating pass up the opportunity of an event. However, due to the experimental throwing a coin or dice are balanced relatively easy then very rarely do calculations chance occurrence by using the Binomial Theorem.

ANALISIS OVERALL EQUIPMENT EFFECTIVENES (OEE) UNTUK MENENTUKAN EFEKTIFITAS MESIN SONNA WEB Agustinus Eko Susetyo
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 3 No 2 (2017): Agustus
Publisher : Universitas Sarjanawiyata Tamansiswa

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Trio Ardhian

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0247-387841

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Jalan Batikan No. 2, Tempel Wirogunan, Daerah Istimewa Yogyakarta

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Kota yogyakarta,

Daerah istimewa yogyakarta

INDONESIA