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INDONESIA
Jurnal Visi Eksakta
Published by Universitas HKBP Nommensen
ISSN : 27233707     EISSN : 27467678     DOI : 10.51622
Core Subject : Health, Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology Neuroscience Public Health
Jurnal Visi Eksakta adalah jurnal dalam bidang IPA meliputi bidang: Kedokteran, Pertanian, Teknik dan bidang IPA lainnya yang diterbitkan 2 kali dalam setahun Juli dan Januari
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 71 Documents
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Disain Dan Implementasi Sistem Penyortir Botol Minuman Otomatis Menggunakan Sensor Berbasis Arduino Uno Sianturi, Libianko; Sitompul, Inra Ahui; Sihombing, Fiktor; Simanjuntak, Jamser; Hutauruk, Sindak
Jurnal Visi Eksakta Vol. 3 No. 1 (2022): Jurnal Visi Eksakta : Edisi Januari
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (416.1 KB) | DOI: 10.51622/eksakta.v3i1.439

Abstract

Currently, the goods sorting process in industry still uses a manual method. Therefore, it is necessary to propose an automatic sorting method using control technology. In order to realize the above issue, an automated method is proposed to separate plastic materials and metallic materials in a prototype of goods sorting process. In our study, a plastic bottle and metal bottle detector was designed using a TCRT5000 infrared sensor and an Arduino Uno-based Proximity sensor. The TCRT5000 sensor functions to detect nonmetallic materials while the proximity sensor detects metallic and nonmetallic materials. The sensors will provide logic output to the microcontroller so that the types of materials that enter the sorting system can be distinguished. After the material passes through the sensor, the LCD will automatically display the object value, then the servo motor will sort the objects by moving the actuator to sort the material. Based on the design and implementation of the prototype and based on testing, the plastic bottle material and metal bottle material can be separated properly
Pengaruh Penambahan Serat Ijuk Terhadap Kuat Tekan Beton Sidabutar, Ros Anita; Simanjuntak, Johan Oberlyn; Simangunsong, Josua Marganda
Jurnal Visi Eksakta Vol. 3 No. 1 (2022): Jurnal Visi Eksakta : Edisi Januari
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (251.872 KB) | DOI: 10.51622/eksakta.v3i1.570

Abstract

Concrete is one of the construction materials consisting of a mixture of coarse aggregate and fine aggregate as a filling material, as well as cement and water as a binder. With the addition of fiber as a partial replacement of ceme­nt to obtain a cheaper cost, for simple buildings. With partial replacement of cement with fiber in normal concrete, which aims to determine the effect of partial replacement of cement with fiber against the compressive strength of concrete. By comparing the length variation of fibers which are respectively 4 cm, 6 cm, 8 cm and fibers taken 2% of the weight of cement. Where the calculation analysis (mix desing) using SNI 7656-2012 (procedure for making normal concrete mix plan). Mix design is done in order to determine the proportion of the mixture is done with strong concrete quality planned. The test object is a cylinder with a diameter with a diameter of 15 cm and height of 30 cm. From the results obtained the replacemen of some of the cement with fibers. Where the test results of normal concrete slump of 10 cm, fiber concrete measuring 4 cm by 10 cm, fiber conrete measuring 6 cm byy 9.8 cm and fiber concrete measuring 8 cm by 9.7 cm. And the maximum compressive strength test results obtained decreased, the test value of cylindrical concrete without the addition of fiber of 27.08 MPa, where the compressive strength of concrete by using 2% fibers with a length of 4 cm of 26.70 MPa, concrete fiber 6 cm of 25.94 MPa, and for fiber 8 cm of 24.72 MPa. So that the compressive strength of concrete that occurs decreases from normal concrete without the addition of fibers.
Keselamatan, Kesehatan Kerja Dan Lingkungan Hidup (K3lh) Pada Proyek Supermarket Jl. Sisingamangaraja XII KM. 3,3 Lumban Gaol, Partahi; Saragih, Tiurma; Hasibuan, Peri Shandy
Jurnal Visi Eksakta Vol. 3 No. 1 (2022): Jurnal Visi Eksakta : Edisi Januari
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (516.115 KB) | DOI: 10.51622/eksakta.v3i1.571

Abstract

Occupational safety, health and environment are all activities to ensure and protect the safety and health of workers through efforts to prevent work accidents and occupational disease in construction work. The purpose of this study is to determine the completeness of supporting facilities for the implementation of Health, Safety and Environment (OHSE) in the supermarket construction project on Sisisngamangaraja XII Km 3,3 Road. And to find out the application of OHSE and the obstacles that occur in the application of OHSE. Based on the results of the analysis of the research that has been done by distributing questionnaires to 47 project workers, the resulth of the completeness of supporting facilities fot he implementation of OHSE got the first/highest rank on the questionnaire. With the results of the data analysis of the completeness of supporting facilities for the implementation of OHSE, the mean is 4.4 with a standard deviation of 0.7. The implementation of OHSE in the project is going quite well and the obstacles that occur in implementating OHSE are among the workers namely the lack of awarness of workers about their own safety.
Evaluasi Kinerja Simpang Tiga Tak Bersinyal (Studi Kasus : Jl. Cemara – Jl. Cemara Asri Booulevard Raya) Simanjuntak, Johan Oberlyn; Bartholomeus; Buulolo, Rizky M.
Jurnal Visi Eksakta Vol. 3 No. 1 (2022): Jurnal Visi Eksakta : Edisi Januari
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (722.468 KB) | DOI: 10.51622/eksakta.v3i1.580

Abstract

Along with population growth and the magnitude of development as well as increasing transportation, the number of vehicles or traffic volume on roads is increasing, including one intersection in Deli Serdang Regency which has traffic density every day with concomitant congestion and a decrease in speed in certain road segments. This study aims to analyze the performance of the unsignalized intersection of Cemara Road – Cemara Asri Boulevard Raya Road and find alternatives to solve the problems that exist at the intersection of Cemara Road – Cemara Asri Boulevard Raya Road. The data collection method is carried out within a certain time by studying primary and secondary data. In this study resulted in the conclution that the intersection of Cemara Road – Cemara Asri Boulevard Raya Road experienced the peak of traffic flow on Sunday at 04.00 – 05.00 PM with a traffic volume of 2,782 smp/hour. The actual capacity is 2,451.6 smp/hour. The degree of saturation is 1.134. Based on value of the degree of saturation, the level of service at the intersection into category F exceeds the saturation limit suggested by the Indonesia Road Capacity Manual, which is > 1.00. It is necessary to revisit the three-arm intersection on Cemara Road – Cemara Asri Boulevard Raya Road. An alternative solution that can be given to obstacles found is the need for widening the geometric of the road in order to increase the capacity of the intersection and based on the degree saturation value, it is necessary to install the tools provided (lights traffic).
Pengaruh Model Pembelajaran Problem Based Learning Berbasis Hypnoteaching Terhadap Hasil Belajar Siswa Pada Materi Cahaya Surbakti, Mariana; Laia, Indah Septa. A.
Jurnal Visi Eksakta Vol. 3 No. 2 (2022): Jurnal Visi Eksakta : Edisi Juli
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51622/eksakta.v3i2.423

Abstract

This study aims to determine the effect of Hypnoteaching-based or Problem Based Learning? (PBL) learning methods on student learning outcomes on the subject of light. This type of research is a pre-experimental study with the population of this study being all students of class X MIA I. The sample in this study consisted of one class that was selected directly with the purposive technique. The research instrument used was an observation sheet on student learning activities and an objective test in the form of multiple choice which had been tested for validity. Based on the results of observations of student learning outcomes, the average pretest score was 34.86 with a standard deviation of 1.33 and the post-test average value was 84.86 with a standard deviation of 1.17. From the results through the t-test of the two samples correlated for pretest and posttest data for = 0.05 and dk = 70, it is obtained that tcount = 24.72 and ttable = 1.67, which shows tcount > ttable, then Ha is accepted and Ho is rejected. Based on the results of this study, we can conclude that there is a significant effect of the Hypnoteaching-based PBL learning model on the learning outcomes of class X MIA I students. The relationship of each variable is indicated to have a significant effect through regression test analysis with the results obtained Y = 42.6 + 0.52 X Based on the results of the correlation test with the acquisition of the value of the correlation coefficient r = 0.73 which indicates that the relationship between the two variables is strong.
Pengaruh Pemberian Ampas Tahu Fermentasi Dalam Ransum Terhadap Karkas Ayam Broiler Pardosi, Untung
Jurnal Visi Eksakta Vol. 3 No. 1 (2022): Jurnal Visi Eksakta : Edisi Januari
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51622/eksakta.v3i1.527

Abstract

The study is aimed at knowing the impact the slag had on the ration against the 35-day broiler carols. This study is carried out in simalingkar, denser of lucky field. The study USES 100 broiler strain of cp 707. The rations used were a mixture of several food-prepared food items in Microsoft excel programs that guide the nutritional needs of the broiler. The method used in this study is a complete random design (ral) consisting of 5 treatments of p0 = 0% p1 = 5% p2 = 10% p3 = 15% p4 = 20% and each has 4 deuteronomy consisting of 5 broiler chickens. The parameters measured are cut weights, weight of cash, percentage of cash. The data obtained from the study was analyzed with (anova). Conclusions drawn from this study suggest that the wise men knew the fermentation in the ration of the 35-day broiler carburettor (p > 0.05) against the weight of the cut, the weight of the karkas, the percentage of the kas
Pengaruh Pemberian Tepung Daun Lamtoro (Leucaena Leucocephala) Dalam Ransum Terhadap Performan Burung Puyuh Jantan (Coturnix- Coturnix Japonica ) Sitorus, Tunggul Ferry; Malau, Ester Angriani
Jurnal Visi Eksakta Vol. 3 No. 2 (2022): Jurnal Visi Eksakta : Edisi Juli
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51622/eksakta.v3i2.1104

Abstract

This study aims to determine the effect of giving lamtoro leaf flour (Leucaena leucocephala) on the performance of male quail (Coturnix-coturnix japonica) aged 2-8 weeks. This research was conducted in the experimental field of the Faculty of Animal Husbandry, HKBP Nommensen University in Simalingkar A Village, Pancur Batu District, Deli Serdang Regency. The research data collection took place for 8 weeks starting from October to December 2021. The experimental design used in this study was a Completely Randomized Design (CRD) with 5 treatments, namely the level of giving lamtoro leaf flour in the ration P0(0%), P1( 1.5%), P2(3%), P3(4.5%), P4(6%), where each treatment was repeated four (4) times and each treatment consisted of 10 male quails. Parameters observed were ration consumption, daily body weight gain, and ration conversion. From the results of the study, it was found that the average consumption of quail rations fed with lamtoro leaf meal for 8 weeks of the study was 9.44 grams/head/day with a range of 9.32 – 9.70 grams/head/day. The average body weight gain of quail was 1.64 grams/head/day with a range of 1.53-1.75 grams/head/day. The average conversion rate for quail was 5.11 with a range of 4.75 -5.39. The results of the variance study (ANOVA) showed that the treatment of giving lamtoro leaf flour in male quail rations had a very significant effect (P<0.01) on daily body weight gain and ration conversion, but had a significant effect (P<0.05) on ration consumption. Based on the results of this study, it is suggested that the best lamtoro leaf flour can be given at the level of 1.5% to 3%.
Penerapan Bioteknologi Reproduksi Untuk Peningkatan Produktivitas Ternak Babi Di Sumatera Utara Silalahi, Parsaoran
Jurnal Visi Eksakta Vol. 3 No. 1 (2022): Jurnal Visi Eksakta : Edisi Januari
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51622/eksakta.v3i1.1105

Abstract

The outbreak of the African Swine Fever (ASF) virus in North Sumatra Province has had a major impact on the economy of hundreds of thousands of pig farmer households. The remaining pig population after the outbreak of only about 15% has resulted in a price increase that has doubled from before and the pork is hard to find too. Most pig farmers switch to other livestock or other professions because many are traumatized by this ASF virus outbreak. To return to being the province that produces the most pork, several reproductive biotechnology can be implemented to accelerate the increase in the population of pigs and at the same time improve the genetic quality of pigs produced by the farmer. Some of the biotechnology referred to are estrus synchronization, superovulation, artificial insemination and frozen semen. Some of the above techniques should also be carried out in conjunction with the concept of upgrading pigs on a regular basis to get a good genetic composition for North Sumatra Province. There are several technical issues that can become obstacles in developing this reproductive biotechnology, but with good assistance it will produce reliable pig farmers who have efficient pigs so that they provide good profits for the breeders.
Pengaruh Pemberian Tepung Maggot Bsf Terhadap Bobot Potong, Bobot Karkas, Dan Persentase Karkas Burung Puyuh Umur 8 Minggu Siregar, Magdalena; Tumanggor, Santa
Jurnal Visi Eksakta Vol. 3 No. 1 (2022): Jurnal Visi Eksakta : Edisi Januari
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51622/eksakta.v3i1.1106

Abstract

This study aims to determine the effect of BSF maggot flour on slaughter weight, carcass weight and carcass percentage of quail (Cortunix-cortunix japonica) aged 8 weeks. This research was conducted in Simalingkar A, Medan Tuntungan District. This study used 80 quails which were taken as many as 4 randomly from each treatment plot. At 8 weeks of age. The rations used were a mixture of several of feed prepared. The method used in this study was a Completely Randomized Design (CRD) which consisted of 5 treatments, namely P0 = 0% ; P1 = 5% ; P2 = 10% ; P3 = 15% dan P4 = 20% and each had 4 replications, each replication consisted of 10 quails. Parameters measured were slaughter weight, carcass weight and carcass percentage. The data obtained from the results of this study were analyzed by ANOVA. The conclusion obtained from the results of this study showed that the provision of BSF maggot flour in the ration had no significant effect (P>0.05) on slaughter weight, carcass weight. and carcass percentage of quail aged 8 weeks.
Kajian Komunitas Ikan Dalam Aplikasinya Bidang Ekologi Perairan Silaen, Sri Natalia
Jurnal Visi Eksakta Vol. 3 No. 2 (2022): Jurnal Visi Eksakta : Edisi Juli
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51622/eksakta.v3i2.1155

Abstract

Indonesia is one of the developing countries in Asia. As a developing country, Indonesia always strives to advance development in all fields including agriculture in a broad sense. The aim of economic development is to increase and expand employment opportunities, increase income, reduce poverty and simultaneously improve people's welfare. The purpose of this research was to determine the effect of partial land area on fish production, to determine the effect of the number of seeds partially stocked on fish production, to determine the effect of land area and the number of seeds stocked together on fish production. Coastal areas have a variety of potentials, including primary food sources containing protein (especially animal protein derived from fish, shrimp and the like), oil, gas and other mineral wealth that has potential in the fields of mining, tourism, settlements and industrial development.

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