cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Gebhardus Djugian Gelyaman
Contact Email
dgelyaman@gmail.com
Phone
-
Journal Mail Official
lahankeringjsaintek@gmail.com
Editorial Address
Universitas Timor, Jln. KM 9 Kel. Sasi, Kefamenanu, Kab. TTU, Prov. NTT
Location
Kab. timor tengah utara,
Nusa tenggara timur
INDONESIA
Jurnal Saintek Lahan Kering
Published by Universitas Timor
ISSN : 26221020     EISSN : 26221020     DOI : https://doi.org/10.32938/slk.v
Core Subject : Health, Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Public Health
Journal of dryland sci-tech (JDLS) covering the field of science and technology in terms of chemistry, biology, mathematics, information technology, and public health and nursing, based on dryland.
Arjuna Subject : -
Articles 82 Documents
 4   5   6   7   8 
Optimalisasi Sistem Alokasi dan Penjadwalan pada Rantai Pasokan dengan Menggunakan Metode Karush-Khun-Tucker (KKT) Oktovianus R. Sikas; Eva Binsasi
Saintek Lahan Kering Vol 4 No 1 (2021): JSLK JUNI 2021
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v4i1.1405

Abstract

This study was conducted to estimate the company's optimal profit by considering the product supply chain in a company that receives orders from several distributors. If all orders cannot be fulfilled by the available production capacity, the company will offer a solution in allocating capacity to distributors by considering scheduling costs and other constraints. The main work in estimating the company's profit is modeling the scheduling costs and constraints in the capacity allocation problem in the company. That is, the company makes order scheduling to minimize costs to achieve maximum profit by applying the Karush-Kuhn-Tucker (KKT) method. Karush-Khun-Tucker can be used to find the optimal solution of the function formed from the allocation and scheduling problems whether linear or nonlinear. In the process, the KKT method basically involves the same steps as the Lagrange method to be able to calculate the critical point and find the optimum solution. It is suggested for further research to involve more varied variables with more interesting cases.
Akumulasi α-Tokoferol pada Organ Tanaman dan Kultur Suspensi Sel Jatropha gossypiifolia Dari Nusa Tenggara Timur Meri Helsiana Mata
Saintek Lahan Kering Vol 4 No 1 (2021): JSLK JUNI 2021
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v4i1.1411

Abstract

Jatropha gossypiifolia Linn. is a type of medicinal plant because it has bioactive compounds such as phenolic acids, flavonoids, saponins, tannins, alkaloids, coumarins, lignins, phenols, steroids, and terpenoids contained in leaves, bark, roots, seeds, fruit, and sap. In addition to these bioactive compounds, another bioactive compound was found, namely tocopherol which is known to have antioxidant activity and can be used to treat several diseases. This study aimed to measure α-tocopherol in plant organs and cell culture of J. gossypiifolia. Crumb callus was induced using Murashige and Skoog (MS) medium and Vitamin Gamborg with the addition of 1.35 x 10-5 2,4-Dichlorophenoxyacetate (2,4-D) and 4,4 x 10-6 M kinetin. Cell suspension cultures were produced by subculture of crumbled callus on MS medium with the addition of 1.35x10-5 2,4-D and 4.4 x 10-6 M kinetin and 30 g/L sucrose. Measurement of the content of -tocopherol seen in plant organs and culture age 0; 3; 6; 9; 12; 15; 18 days using High Performance Liquid Chromatography (HPLC) method using methanol:water (95:5) as mobile phase. The results showed that the callus formation of J. gossypiifolia was observed after the explants were incubated for one week. The content of α-tocopherol in cell suspension culture of J. gossypiifolia was detected at the beginning of the culture age and then decreased and increased again until the 9th day. The content of α-tocopherol on day 9 was 0.23%. After the 9th day, the α-tocopherol content began to decrease. In culture medium, α-tocopherol was also found since the beginning of culture and the percentage increased on the 9th day until it reached a maximum on the 12th day of 0.12%. The level of α-tocopherol in the plant organs of J. gossipiifolia was highest in the roots of 0.12%.
Penerapan Konsep Himpunan Dominasi pada Teori Graf untuk Optimalisasi Jumlah Kebocoran Pipa Air Minum di Desa Mausamang, Kabupaten Alor Landerius Maro; Orpa Herlovina Yoplib
Saintek Lahan Kering Vol 4 No 2 (2021): JSLK DESEMBER 2021
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v4i2.1481

Abstract

Regional development is one of the problems that are often faced by PDAM. The development of the area is the development of a water pipe distribution network. The more people there are, the more people will find it difficult to get optimal drinking water because they leak it without thinking about other peoples. As an example of the problem of regional development, there are several areas that have not received water from PDAM, this shows that the distribution of clean water isn’t optimal. In an effort to overcome these problems, an action is needed to optimize the pipe leaks. The purpose of this study is to minimize the leaks of the primary pipe by using the concept of applying the domination set of graph theory. The research steps carried out by researchers include data collection, determining the domination set, and distribution of drinking water pipelines. The comparison of the total initial primary pipe leaks points is 80 points that dominate 117 house points and by minimizing the primary pipe leaks by applying the concept of the domination set to 44 points that dominate 117 house points there is a reduction of 36 primary pipe leaks points that will be closed. The data concludes that the concept of the domination set on the graph can be used to find the optimal network in the PDAM water distribution network.
EFEKTIVITAS PEMBELAJARAN DARING PADA MAHASISWA PRODI BIOLOGI, MATEMATIKA DAN TEKNOLOGI INFORMASI UNIMOR DI BENTANG ALAM LAHAN KERING Willem Amu Blegur; Krisantus Jumarto Tey Seran; Fried Markus Allung Blegur
Saintek Lahan Kering Vol 4 No 2 (2021): JSLK DESEMBER 2021
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v4i2.1534

Abstract

Pandemic Covid-19 have changed so many aspects in our lives including educational activities. Universitas Timor located in land arid area then influenced by it, in Biology, Information Technology and Maths students in versa. The aims of these research were to study about effecitivity in online learning implementation according to the students and lecturers and to study more what is the barriers and / or supports for the apply in three study program. Data collected using quetionnaires by filling google forms and interview to our respondents. They were students from Biology: 24, Information Technology: 83, Maths: 31 and lecturers: 9. The results performed that our respondents agreed to this implementation while avoiding Covid-19 spread among students and lecturers (Biology: 23, IT: 81, Maths: 30 and lecturers 9 people). Our students spent their own money from their parents to buy intenet debt majority around Rp50.000 - Rp100.000 in a moth (Biology: 12, IT: 47, Maths: 15). The students chosen googleclassroom, googlemeeting, zoommeeing, WAG and combine among them, respectively. Our lecturers and students still could do practices using less resources of laboratory and tools (Biology: 23, IT: 75, Maths: 21). And then the process still gave more progress to the students for their marks and knowledge accoding to them (Biology: 14, IT: 45, Maths: 20). To honest that the students more like to study face to face in class especially Biology and Maths students but neither for IT students.
Pengembangan Program Linear Multi-Objektif Fuzzy Stokastik Model Simetris dan Penyelesaiannya dengan Menggunakan Teknik Chance Constrained Ernestina Lalian; Grandianus Seda Mada; Faustianus Luan; Eva Binsasi
Saintek Lahan Kering Vol 4 No 2 (2021): JSLK DESEMBER 2021
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v4i2.1535

Abstract

Linear programming is one method oto determine the optimum value of a problem. Problems of the linear program faced by the decision makers have various variations from time to time. A variety of problems that can be seen as a multi-objective fuzzy linear programming, muli-objective stochastic linear programming, or a combination of both. This study focus on Multi-Objective Fuzzy Stochastic Linear Programming (MOFSLP) with each objective function has a same level of importance for decision makers or name as symmetrical model. The objective function of the MOFSLP contains the fuzzy parameters and normally distributed random variables while the function of constraints contains the fuzzy parameters. The purpose of this research is to formulate MOFSLP and develop algorithms to transform MOFSLP be Single-Objective Deterministic Linear Programming (SODLP) which can be solve using the simplex method. In transforming MOFSLP to SODLP, symmetrical model and also the chance constrained technique are used. In the end of this research, a numerical example is provided to illustrate the algorithm that has been developed. The models and algorithms that have been formed are expected to help decision makers in solving a problem.
PEMODELAN MATEMATIKA PENYEBARAN PERILAKU MEROKOK BERDASARKAN FAKTOR EKONOMI DAN FAKTOR PSIKOLOGI Desi Marida Babis; Elinora Naikteas Bano; Sulasri Suddin; Leonardus Frengky Obe
Saintek Lahan Kering Vol 4 No 2 (2021): JSLK DESEMBER 2021
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v4i2.1541

Abstract

Smoking is the activity of burning tobacco then sucking the smoke and releasing it back through the mouth. This study examines the spread of smoking behavior based on economic factors and psychological factors. This model divides the population into 4 subpopulations, namely potential smoker , Beginner smoker , Smoker subpopulation and recovery subpopulation The stability of the smoking-free equilibrium point is obtained by linearizing the equation to obtain the Jacobian matrix and then the eigenvalues will be obtained. The basic reproduction number which is the threshold for the spread of smoking behavior where smoking behavior will disappear if Ro < 1 and will be endemic when Ro > 1.
PROYEKSI INDEKS PEMBANGUNAN MANUSIA (IPM) KABUPATEN ALOR TAHUN 2030 MENGGUNAKAN PENERAPAN MODEL EKPONENSIAL DAN MODEL LOGISTIK Melki Imamastri Puling Tang; Abraham Puling Tang
Saintek Lahan Kering Vol 4 No 2 (2021): JSLK DESEMBER 2021
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The population growth rate of Alor district continues to increase every year. To estimate the population for the following year, population estimates are usually used, which are used as the basis for economic and social planning to determine future needs. Population growth models with exponential and logistic models are well known in determining population growth. The research method used is a case study of the population in Alor Regency. The data in this study is population data obtained from the Central Statistics Agency (BPS) Alor from 2015-2019. The data that has been obtained is processed using Exponential and Logistics methods to obtain forecast data or projections of the population of Alor Regency in 2020 Alor. Based on the results of the discussion above, exponential and logistic models can be used to predict the population of Aor Regency in 2030. Based on the results of the above discussion, exponential and logistical models can be used to predict the number of Human Development Index of Alor Regency in 2030. Predicted number of Human Development Index of Alor Regency in 2030, based on the results of exponential model 1 is 64.12; exponential model 2 is 65.69; and the exponential model 3 is 65.72. Meanwhile, the prediction of the Human Development Index for Alor Regency in 2030 based on the logistics model is 64.98.
Penggunaan integer linier programming untuk meminimumkan ruang kuliah pada Mata Kuliah Dasar Umum (MKDU) Studi Kasus di Universitas Tribuana Kalabahi Damaris Lalang; Dewi Rosalina Alohaja
Saintek Lahan Kering Vol 4 No 2 (2021): JSLK DESEMBER 2021
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v4i2.1554

Abstract

Scheduling courses is one of the problems that are often experienced by a university. The same is true for Tribuana Kalabahi University (UNTRIB). The scheduling of courses at UNTRIB consists of two scheduling schemes, namely scheduling of Study Program courses and scheduling of General Basic Courses. Scheduling of Study Program Courses is arranged by the Study Program while for MKDU it is arranged by a team in the MKDU unit at the beginning of each semester. The scheduling process is done manually, by taking the schedule of courses in each Study Program at UNTRIB, after that MKDU begins to arrange course scheduling by adjusting the scheduling of courses from existing study programs. Integer linear programming (ILP) is a method that can model scheduling problems with various constraints that can be adapted to the needs of the University, and ILP can be used to make MKDU scheduling using Lingo 11.0 software. The purpose of this study is to minimize the lecture hall so that there are no clashes during lectures. From the results of this study, it was stated that initially using 20 lecture rooms, it could be converted into 5 lecture rooms with adjusted time slots
Inventarisasi Serangga pada Lahan Pertanian Hortikultura di Kelurahan Sasi Kecamatan Kota Kefamenanu Yunita T. S. Tneup; Maria Marselina Bay; Gonsianus Pakaenoni
Saintek Lahan Kering Vol 5 No 1 (2022): JSLK JUNI 2022
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v5i1.1643

Abstract

Horticulture is a science that studies the intensive cultivation of plants and products that are used by humans as food, fresheners or flavorings and as an alternative to protecting and protecting plants for the environment. The aims of this research are: to find out what types of insects are found in horticultural plants in Sasi Village, the grouping of insects on horticultural plants in Sasi Village and the influence of environmental conditions on the presence of insects on horticultural plants in Sasi Village. This research was conducted in Horticultural Agricultural Land, Sasi Village, Kefamenanu City District. The method used in this research is the pitfall trap, sweep net and yellow tray method. The results showed that on the horticultural agricultural land of Sasi Village there were 5 types of insects, namely: order Coleoptera, order Diptera, order Hymenoptera, order Ortoptera, order Lepidoptera and 12 insect families, namely: Family Scarabaidae, family Coccinelidae, family Chrysomelidae, family Curculinidae, family Muscidae , family Tephritidae, family Tehrididae, family Eulophidae, family Gryllidae, family Pieridae, family Bombylidae and family Noctuidae, with a total of 237 individuals.
ISOLASI DAN KARAKTERISASI BAKTERI PENGHASIL ANTIBIOTIK DARI TANAH SAWAH DI NAEN KABUPATEN TIMOR TENGAH UTARA Adelya Irawan Manalu; Lukas Pardosi
Saintek Lahan Kering Vol 5 No 1 (2022): JSLK JUNI 2022
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v5i1.1780

Abstract

Soil is a habitat for small animals and microorganisms. The most abundant microorganisms in soil are bacteria. The soil used in the study was soil obtained from paddy fields in Naen, North Central Timor Regency.The study aimed to characterize the bacterial isolates obtained from the paddy fields which are known to produce antibiotics. Rice soil samples were taken at a depth of about 15 cm from the soil surface and then cultured in Nutrient Agar media with graded dilutions. Characterization was carried out by macroscopic observation, namely direct observation, then a challenge test was carried out against S. aureus bacteria. The results showed that there were 6 bacterial isolates with macroscopic results mostly irregular in shape and 1 isolate fibrous. There were 4 bacterial isolates namely STS1, STS3, STS4, and STS6 which had inhibitory power against the growth of S. aureus.

Page 6 of 9 | Total Record : 82

 4   5   6   7   8 

Filter by Year

2018 2024


Reset
Filter By Issues
All Issue Vol 7 No 1 (2024): JSLK JUNI 2024 Vol 6 No 2 (2023): JSLK DESEMBER 2023 Vol 6 No 1 (2023): JSLK JUNI 2023 Vol 5 No 2 (2022): JSLK DESEMBER 2022 Vol 5 No 1 (2022): JSLK JUNI 2022 Vol 4 No 2 (2021): JSLK DESEMBER 2021 Vol 4 No 1 (2021): JSLK JUNI 2021 Vol 3 No 2 (2020): JSLK DESEMBER 2020 Vol 3 No 1 (2020): JSLK JUNI 2020 Vol 2 No 2 (2019): JSLK Desember 2019 Vol 2 No 1 (2019): JSLK Juni 2019 Vol 1 No 2 (2018): JSLK Desember 2018 Vol 1 No 1 (2018): JSLK Juni 2018 More Issue