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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 141 Documents

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EKSPLORASI KEMAMPUAN PEMECAHAN MASALAH MATEMATIS MAHASISWA PENDIDIKAN GURU SEKOLAH DASAR Nelly Rhosyida
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 3 No 1 (2017): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

This study is aimed to explore the achievement of mathematical probem solving skill of student in PGSD Sarjanawiyata Tamansiswa University, and studentâ€™s mistake on mathematical problem solving test.This study is a qualitative research and case studies. The subjects were students of the University of Sarjanawiyata Tamansiswa PGSD Yogyakarta who have following courses Mathematics Learning Problems in Elementary School. Two classes were randomly selected two as a research subject, the classes C and G. The instrument in this research is a problem solving skill testand interview guidelines. Based on test data KPM then conducted interviews to 11 students.The results showed that the mathematical problem solving skill of students PGSD UST is low. It can be seen from the acquisition of the average class, class C and class G, both of them are in the category low (<68), ie 52.3261 and 55.2340. The percentage of the number of students who are in low category in class C is 95.65%, while class G is also quite large at 87.23%. Only a small proportion of students in the midle category. No one in the high category. Most of the student are in understanding of the problem level (65.12%), followed by the strategic planning (46.93%), carry out the completion strategy (32.08%), and the least is the stage of the re-examination (7.7%) , Mistakes made by students on problem solving skill test are incorrect data, the response level conflict, the problem of hierarchy of skills, the procedure is not appropriate, and the missing conclusion

PENGARUH DURASI SERANGAN GELOMBANG TERHADAP TINGKAT KERUSAKAN LAPIS LINDUNG PEMECAH GELOMBANG Ida Bagus Agung
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 1 No 1 (2015): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

this research tetrapodÂ have been utilized for breakwaterÂ cover layer or armour layer. The effect of wave duration on the armorÂ layer tetrapod stability wasÂ studied. The models were runÂ in the irregular wave flume, where Bretschneider spectrum may be generated attackingÂ the breakwater. The waves were set to break before reaching the breakwater. The test was conducted until the damage level of armour layer reached more than 5 %. The result of the research showed that waves duration and the highÂ of the wave attack affect the stability of armour layer, especially when the waveÂ was Rayleigh distributed. The effect of waves durationÂ reducedÂ as more and more waves broken before reaching the structure of the breakwater

ANALISIS KESTABILAN MODEL DUA PEMANGSA DAN SATU MANGSA DENGAN PENERAPAN RACUN Irham Taufiq
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 2 No 1 (2016): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

This research discussed prey and predator model showing the interaction between one prey and two predators by using poison. The interaction between prey and predator used response function of Holling type II. The growth of prey and predator used logistic function. From the model, it was found five equilibrium points. The local stability of each equilibrium point was analyzed. To make it easier in interpreting the dynamic between prey and two predators and the effect of giving poison, the numeric simulation was done by showing the change of parameter of the level of death due to poison and the efficiency of changing the prey consumption towards the birth of the first and second predators

PENENTUAN KOEFISIEN GESEKAN KINETIK KAYU PADA KAYU DENGAN METODE GRAFIS Puji Hariati Winingsih
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 2 No 2 (2016): Agustus
Publisher : Universitas Sarjanawiyata Tamansiswa

The aim of the reasearch is in order to determine the coefficient of kinetic friction in the wood by using graphical method through the experiment of friction force. To determine the coeeficient of wood kinetic friction by using variety of masses (12 x 10-1, 15 x 10-1, 22 x 10-1, 25 x 10-1, 27 x 10 1, 32 x 10-1, 36 x 10-1, 42 x 10-1, 46 x 10-1, 52 x 10-1) kg. The analysis of data used weighted linear regression with REGLIN which was written in Matlab language and run by the the Windows XP operation system. The outputs of regresion was obtained in the form of linear function coefficients are a0=0.0156 dan a1= 1.972, included the error (SÎ¼= 0.06). The results was revealed the coefficient of wood kinetic friction of the wood by using graphical method was Î¼k= (0.20 Â± 0.06). It was based on the theory that Î¼k= 0.20. The chisqure test showed that there were relationships between fk and m, with the value of probability P ( 2 Ã· 2 â‰¥ Ã· hit ) = 50.16 %, so that the data was accepted.

ANALISIS NUMERIK PENGGUNAAN GEOTEKSTIL DI LAPISAN TANAH DASAR PADA PROYEK PEMBANGUNAN JALAN PONCOSARI-GREGES (KABUPATEN BANTUL, PROPINSI D.I. YOGYAKARTA) Zainul Faizien Haza
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 3 No 1 (2017): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Geotextile is normally used in geotechnical and other civil engineering work. Geotextiles have been increasingly applied as reinforcement in road embankments. The purpose of this study is to develop the back calculation on safety factor of the use of geotextile as the reinforcement in road embankment considering the displacement in the Proyek Pembangunan Jalan Poncosari-Greges Kabupaten Bantul, D.I. Yogyakarta. The numerical analysis of the road embankment stability was analyzed by finite element method using PLAXIS. Plane strain model was used in this study to calculate the displacement of the road embankment. Analysis results showed that the safety factor obtained by analysis using PLAXIS on the embankment reinforced geotextile was 1.53, which was greater than the standard of safety factor of 1,2. This study concluded that the road embankment was a safe soil construction for the Project of Jalan Pocosari-Greges Yogyakarta.

PELUANG EKONOMI TANAMAN CIPLUKAN (Physalis angulata L) SEBAGAI ABATE ALAMI Wahyu Setya Ratri; M. Th. Darini
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 2 No 1 (2016): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Dengue shock system (DSS) is disease that is caused by virus and attacks the thrombosis of human being that may break the blood vessel and may cause death. This disease is caused by mosquito named Aedes aegypty whose cycle is five years and its proliferation is very quicklyÂ Â Â Â (7 days). Preventive efforts that have been done so far is by relying on chemical medicines by fogging and the use of Abate in which it may cause dependency on it and residue of mosquitoes. The content of Abate that kills mosquito larva is themephose, that is a compound organic phosphate which is the same as papain from papaya (Carica papaya L). TheÂ content of this compound kills the growth of mosquito larva by slowing down the rate of metabolism in their bodies. The content of compound in Ciplukan (Physalis angulata L) plants is chosen because it does not contain residue on the environments and, on the contrary, if is unintentionally drunk by people will minimize the effect of suffering from diabetes. This research used Ciplukan (Physalis angulata L) plant extract, particularly from its leaves and stems because its content of alkaloid is more than the content of themephose in Abate; that is 4.06 ppm and 1,56 ppm per 100 gram of the plant (Abate 1 ppm per 100 gram), so in term of activity it is proven that by using the leave extract can kill the mosquito larva in shorter time, less than 24 hours with concentration 100%. Meanwhile, in the stem solution, the percentage of the death of larva is almost the same as the papaya solution, in which it takes less than 78 hours with concentration 100%. It was supported by the result of test using CRD from which it was known that leave extract has larger coefficient than stem extract. It means that the capability of the leave extract (deviation standard 12.43s) is larger thanÂ the stem extract (deviation standard 7.2s). Compared to the use of Abate, the average death of mosquito larva by using leave extract is 26.9 larva per day and compared to the use of stem extract, the average death of mosquito larva is 3.93 larva per day. Economically, we can save Rp 11.350,00/pack if we take Ciplukan leaves and stem to be extracted in which it consists of 10 grams ofÂ Ciplukan leave and stem extract. If the extract or natural Abate is sold, it will cost Rp 650,00/pack; it is more economical than the price of chemical Abate in which price Rp 12.000,00/pack. From the calculation, it is so profitable if we run business on it. We can get back our capital for one year, in which the break event point (BEP) can be reached after selling 162 units which cost Rp 162.000,00 and the profit is more or less Rp 283.000,00/ each production

INSPIRASI FISIKA MISTERI SEBAGAI PROBLEM SOLVING PEMBELAJARAN SAINS DALAM MENYONGSONG MEA Handoyo Saputro
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 2 No 2 (2016): Agustus
Publisher : Universitas Sarjanawiyata Tamansiswa

The quality of education was the main condition to realize advanced, modern, and prosperous nationâ€™s life which was determined by the quality of human resources. The quality of human resources itself was determined by the quality education at the basic, intermediate or advanced level. The education plays a key role in the effort to educate the nation lifes. The physics of mystery was an inspiration and new inovation of problem solving on the physics science learning to respond the challanges in welcoming MEA. To produce inovation learning, all of the learning components that include teachers, students, teaching materials, the achievments of competency, and learning evaluation need to be innovated. The point was the innovative physics science learning was learning that could equip accompaniment effects learning that include higher level thinking and generic phiysics science skills. A wide variety of advanced technology was the result, such as the technology of tranportation which made the humans could travel from one place to another easily and quickly. The technology would not be possible to develop andcreate without the fundamental of knowladge that supports it. The fundamental of knowladge was none other than science, particularly physics. In this paper, it would be shown about the new inspiration of innovative of physics learning as the problem solving of physics concept. It was the physics of mystery. The secret behind this inspiration could be one of solution to overcome the student difficulties in undertanding of physics concepts easily and quickly and also to respond the challanges of global competition (MEA).

PENENTUAN BEBAN KERJA MENTAL PERAWAT BERDASARKAN SHIFT KERJA DAN JENIS KELAMIN MENGGUNAKAN METODE NATIONAL Retno Widiastuti; Dian Eko Hari Purnomo; Adhitya Nur I.M
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 3 No 2 (2017): Agustus
Publisher : Universitas Sarjanawiyata Tamansiswa

Instalasi Â Gawat Â Darurat Â merupakan Â salah Â satu Â unit Â lingkungan Â kerja, Â yang Â memiliki kecenderunganÂ tingkat bebanÂ kerjaÂ tinggi.Â HalÂ iniÂ dimungkinkan karena perawatÂ ruang Gawat Â Darurat Â dihadapkan Â pada Â pasien Â dengan Â kondisi Â jiwa Â yang Â terancam, Â sehingga membutuhkan perhatian, pengetahuan dan Â keterampilan khusus untuk dapat memberikan tindakan dengan cepat dan tepat. Instalasi Gawat Darurat Â memiliki peran sebagai gerbang utama jalan masuknya penderita gawat darurat. Perawat IGD harus selalu siap selama 24 jam karena pasien bisa datang kapanpun dan dengan kondisi yang berbeda.Penelitian Â ini Â bertujuan Â untuk Â mengetahui Â tingkat Â beban Â kerja Â mental Â yang Â dirasakan perawatÂ berdasarkanÂ shiftÂ kerjaÂ danÂ jenisÂ kelaminÂ perawatÂ diÂ InstalasiÂ GawatÂ Darurat Rumah Sakit Nur Hidayah Â Bantul. Metode yang digunakan dalam Â penelitian ini adalah NASA-TLX. Hasil penelitian dapat disimpulkan bahwa berdasarkan penelitian yang dilakukan di Rumah Sakit Nur Hidayah Bantul pada Instalasi Gawat Darurat, tingkat beban kerja mental yang dirasakan perawat berdasarkan Â shift kerja adalah 69,7% pada shift pagi, 76,7% pada shift sore, dan 83% pada shift malam. Sedangkan beban kerja mental perawat berdasarkan jenis kelamin adalah 77,7% untuk perawat laki-laki dan 75,9% untuk perawat perempuan

Perancangan Model Matematis Untuk Penentuan Jumlah Produksi di PT. XZY Dian Eko Hari Purnomo
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 3 No 1 (2017): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Determining the amount of production in an industry is a very important thing before starting the production process. Therefore we need a mathematical model that can help industry players in performing production planning. Mathematical model is a formula that helps industry players in PT. XYZ in solving semi-structured problems in the form of production planning. Many techniques are used to create a mathematical model, one of them with Fuzzy Logic. Fuzzy logic is one of the problem solving techniques where membership degrees are usually represented by values between 0 and 1, so they can be more balanced. One of the fuzzy methods that can be used in solving the problem is the Fuzzy Tsukamoto Method which applies weighted average to calculate the amount of production at PT. XYZ as the end result. The mathematical model of determining the amount of production using the Fuzzy Tsukamoto Method is able to produce a more optimal and balanced quantity of production compared to the calculation without using the method.

KELAYAKAN TEKNIS PENAMBANGAN EMAS PADA WILAYAH PERTAMBANGAN RAKYAT Studi Kasus: Desa Kalirejo, Kecamatan Kokap, Kabupaten Kulon Progo Dian Hudawan Santoso; Muammar Gomareuzzaman
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 4 No 1 (2018): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

The People's Mining Area is a mining area established by the government as a community managed mining area. The management of the mining by the people of gold mining in Kalirejo Village has largely not yet paid attention to the environmental order. It can lead to landform changes and potentially cause negative impact for the environment. The main purpose of this research is to know the technical feasibility of gold mining people. Methods used in this research are survey and mapping, rating, and descriptive analysis methods. Technical feasibility analysis of gold mining is done based on the priority level of security of mining activities in Kalirejo Village, Kecamatan Kokap. Based on the technical feasibility analysis, it can be concluded that the research location has 2 classes, namely: which declared "feasible" at the gold mining location in Plampang 1 sub-village and "less feasible" at the gold mining location at Plampang 2 and Papak sub-village

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