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Muhammad Ridwan
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Budapest International Research in Exact Sciences (BirEx Journal)
Published by Budapest International Research and Critics University Journal
ISSN : 26557835     EISSN : 26557827     DOI : DOI: https://doi.org/10.33258/birex
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Physics Transportation
Budapest International Research in Exact Sciences (BirEx-Journal) is a peer reviewed journal published in January, April, July, October welcome research paper in Medical Science, Agriculture Science, Biological Science, Engineering Science and other related areas and it is published in both online and printed version
Arjuna Subject : Ilmu Material (semua kategori) - Ilmu Material (Lain-Lain)
Articles 270 Documents
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Efication of Some Entomopatogen Fungus on Green Ladybug Imago (Nezara Viridula Linnaeus) (Hemiptera: Pentatomidae) Muhammad Agung Permadi; Rafiqah Amanda Lubis; Mukhlis Mukhlis; Imam Aryo Pahlawan; Sulaiman Abdi
Budapest International Research in Exact Sciences (BirEx) Journal Vol 1, No 2 (2019): Budapest International Research in Exact Sciences, April
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v1i2.220

Abstract

Green ladybug (Nezara viridula L.) is an important pest in some plants, including soybeans. N. viridula attacks cause a decrease in yield of up to 80%. Environmental friendly pest control studies are needed to overcome the problem of resurgence caused by N. viridula, among others by utilizing entomopathogenic fungus as their natural enemies. This study discusses about the efficacy of entomopathogenic fungi against N. viridula imago. The research is conducted at the Agricultural Agrotechnology Laboratory, Muhammadiyah University of South Tapanuli. The study uses a completely randomized design, nine treatments (control and eight isolates of entomopathogenic fungus) with three replications. The conidia density used is 108 conidia / ml. The entomopathogenic fungus application was performed on N. viridula imago. The results shows that MetKP fungus isolates are able to kill N. viridula imago with the highest mortality rate of 78.33%. The isolates of MetKM fungi and M. anisopliae caused the lowest imago mortality of 61.67%. Isolate of B. bassiana fungus had the lowest LT50 with a time of 5.66 HSA and the isolate of the MetTmM fungus had the highest LT50 with a time of 7.27 HSA. In the immature body part of N. viridula infected with fungus is enveloped by entomopathogenic fungal mycelium.
Investigation of Microstructure and Corrosion Resistance of Dissimilar Welded Joint between 304 Stainless Steel and Pure Copper Sorush Niknamian
Budapest International Research in Exact Sciences (BirEx) Journal Vol 1, No 3 (2019): Budapest International Research in Exact Sciences, July
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v1i3.382

Abstract

Nowadays, welding of dissimilar metals has become significant. In this process, a number of parameters including but not limited to type of electrode, amount of current, preheating temperature, and welding rate, that are essential to be taken into account. For welding of dissimilar metals, various methods are exploited including shielded metal arc welding (SMAW) and gas tungsten arc welding (GTAW). The stimulus for studying welding of 304L stainless steel to pure copper originates from difficulties in joining copper parts of           water-circulating molds to their steel part. In this study, the welding is performed on plates of steel and copper using SMAW, GTAW and combined SMAW+GTAW welding methods with    EL-CuMn2, ENiCrMo-6 and ER70S-4 electrodes. In order to investigate the microstructure and corrosion resistance behavior of welds, the samples were characterized using microstructural study and polarization test. It was observed that among all four welding methods, only combined SMAW+GTAW welding process resulted in successful joint between 304L stainless steel and copper. Both obtained joints possess suitable microstructure and corrosion resistance.
Change of Meaning in Space and Form of Contemporary Karo Architecture Mohammed Nawawiy Loebis; Imam Faisal Pane; Wahyu Abdillah; Aurora S. Lubis
Budapest International Research in Exact Sciences (BirEx) Journal Vol 1, No 4 (2019): Budapest International Research in Exact Sciences, October
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v1i4.485

Abstract

Karo Plateau is one of the most valuable assets for North Sumatra Province, Indonesian. In addition to fertile soil and producing good quality vegetables and fruit, this plain also has architectural heritage to be proud of. Several villages up to now can be seen and visited which stores various Karo architectural works including some traditional buildings and houses. Change with the times, the movement of people also occurs for various reasons. The development of the city in this province makes the villagers look for livelihood in the city. However, the inheritance of ancestors was still held firmly to the present with a different format. The Karo family currently lives in shophouse and is no longer in a traditional house and they have a business there. The perception of space in traditional houses really carried over in their daily lives. Using qualitative methods, this article explains the interpretation of the different perceptions of Karo people regarding the space and form of their place of residence. However, the essence or meaning that exists in the traditional Karo architecture is still approved until now in a different form and format.
Model Of Sugar Industrial Waste Management Based On Cleaner Production (Case Study: Sei Semayang Plantation and Sugar Mill) Siti Mardiana; Retno Widhiastuti; Sumono Sumono; Luqman Erningpraja
Budapest International Research in Exact Sciences (BirEx) Journal Vol 2, No 1 (2020): Budapest International Research in Exact Sciences, January
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v2i1.705

Abstract

Controlling the amount and level of sugar industry waste must be done carefully, ranging from sugar cane harvesting in the field to the processing of cane into sugar mill. The aim of this research is constructing model and getting strategy and policy of sugar industry waste management based on clean production using dynamic system.  This research was conducted at Sei Semayang plantation and sugar mill, PTPN II, North Sumatera in January until  July 2013.Dynamic model system of waste management based on clean production was analyzed using Powersim program, license by sofware house Powersimtm, USA. The research shows Dynamic model of sugar industry waste management can be done by combining environmental subsystem model and socio-economical subsystem. The scenario and policy of sugar industry waste management based on clean production results in waste minimilization, production process efficiency and increase of agricultural contribution, that it increases the surrounding community’s income and involvement, and the company’s income.
Clinical Characteristic Myasthenia Gravis among Indonesians Syahrul Syahrul; Endang Mutiawati; Nur Astini; Nurul Fajri; Suherman Suherman
Budapest International Research in Exact Sciences (BirEx) Journal Vol 2, No 2 (2020): Budapest International Research in Exact Sciences, April
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v2i2.1015

Abstract

Myasthenia gravis (MG) is a relatively rare autoimmune disorder on peripheral nerves where an antibody of nicotinic acetylcholine postsynaptic receptor is formed on neuromuscular junction (NMJ). MG is clinically characterized with a fluctuating muscle weakness. The incidence rate is 0.25 to 2.0 per 1,000,000 among population. 10% of the population is children and adolescents.  Over the past forty years, a mortality rate has improved in the myasthenic crisis from 75% to less than 5%. Moreover, in Indonesia, this is still considered a rare disease. This study applied a retrospective cross-sectional study design. Data were gathered from patients diagnosed and treated for myasthenia gravis admitted in the neurological emergencies in the hospital during January to November 2019. Afterwards, the follow-up clinical information was also being analyzed. 12 cases of myasthenia gravis were collected with females predominated (75%), and one male (25%) with the average age of 30-40 years. The majority (75%) had the onset of < 35 years. The patients were from various districts, with 75% referral from the district and 58% housewives. Clinically, 8% patients had the ocular myasthenia and 92% was the generalized one. The ocular myasthenia had a relatively earlier onset. As MG symptomatology bears a wide range of variability and severity, it was graded based on Osserman’s and Myasthenia Gravis Foundation of America’s (MGFA) classification. Out of all patients, 13.7% belonged to Osserman’s class 1-3 (33%) and class 4-5 (67%). Myasthenia Gravis Foundation of America (MGFA) grading calibrated the severity of each crisis. The findings were 17% crisis of milder degree and 83% of moderate to severe nature. The thyroid disorder was evident in one of the patients (8.3%). Laboratory findings were 75% patients with the increase in leukocyte count. The treatment was only 25% anticholinesterase, 50% anticholinesterase and steroid, in addition to 25% anticholinesterase and therapeutic plasma exchange (TPE). The hospital stay was (the average in days) 83% with >7 days. The myasthenia gravis reported was 12 cases. Patients’ outcome depended on the clinical condition when they first arrived in the hospital. These findings will be useful for the resource allocation and planning in health services. Many regions worldwide have few or no epidemiological data on the myasthenia gravis, and more studies are required to yield more estimates that are accurate.
Analysis of Supplier Ability in Providing Raw Materials Cassava and Planning the Amount and Time of Arrival Raw Materials at PT. ABC Yudi Daeng Polewangi
Budapest International Research in Exact Sciences (BirEx) Journal Vol 2, No 3 (2020): Budapest International Research in Exact Sciences, July
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v2i3.1078

Abstract

PT. ABC is a company engaged in the processing of cassava that produces tapioca flour. The smooth production of the company depends on the ability of suppliers to provide cassava raw materials. Problems that arise in the company are the frequent vacancies caused by the unavailability of raw materials and on other days there are high working hours due to the amount of raw materials received by the company exceeding production capacity per day by also considering the economic age of raw materials. Based on the research it was found that the ability of cassava processing companies based on production capacity amounted to 3,796 tons / month. In April 2019, total shipments of raw materials from suppliers amounted to 3,987 tons, which means it exceeded the company's capacity. But still visible emptiness of raw materials on certain days, this is due to lack of planning the arrival time of raw materials. Based on the analysis using forecasting methods, it is found that the amount of raw material provided is able to meet the production capacity each month but has not been able to meet customer demand. The steps that must be taken are determining the amount of raw materials that can be provided by the supplier, determining the amount of raw material usage, determining the amount and time of delivery of raw materials. Delivery of raw materials can be done 2 or 3 times per week with the amount of raw materials sent adjusted to the needs of the day the company.
The DNA Barcoding of Several Commercial Fish from Simeulue Islands Coast of Aceh Using Cytochrome Oxidase Sub Unit I (COI) Gene Marker Edwarsyah Edwarsyah; Muhammad Nasir; Muhammad Banda Selamat
Budapest International Research in Exact Sciences (BirEx) Journal Vol 1, No 1 (2019): Budapest International Research in Exact Sciences, January
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v1i1.140

Abstract

Simeulue is a cluster of islands that rich of commercial fisheries in Aceh waters. Management of the fisheries products is highly related to species identification in order to ascertain the appropriate steps to manage the resources sustainably. Identification using DNA barcoding tools is the right answer for the problem that have not been able to be resolved even by morphological approach. Some of 11 individual samples were taken from 6 sampling points based on lobster’s catchment and cultivation areas. All of the samples were identified using COI mitochodrial DNA resulting 6 species including Scomber scombus, Scomberomorus plurilineatus, Octopus cyanea, Taeniura Lymna, Sympterygia bonapartii and Panulirus versicolor. The DNA bases were aligned using MEGA application and Neigbour- Joining method, Kimura 2 parameters resulting a 690 base pairs nucleotides. Reconstruction of philogenetic tree shows that the species of Simeulue were conjoined into one clade with the sequences downloaded from genebank. It shows that those species were closely related genetically indicating by the bootstrap value of Scomber scombus (100), Scomberomorus plurilineatus (100), Octopus cyanea (100). The results of the study shows that the DNA barcoding tools can explicate not only the identification up to the species level but also the genetic relationship that can be seen from the interspecies bases composition.
Related Knowledge and Support Family Mother Pregnant Women Attitudes about Prenatal Care (ANC) Aritonang, Dor Valda A; Adiwijaya, Saputra; Wulandari, Anggun; Anita D, Nyoman
Budapest International Research in Exact Sciences (BirEx) Journal Vol 1, No 3 (2019): Budapest International Research in Exact Sciences, July
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v1i3.340

Abstract

Antenatal care is a service provided to mothers in the process of pregnancy and to provide assurance that the mother and fetus are safe in pregnancy and childbirth. In the 2013 Riskesdas, the coverage of antenatal care for pregnant women increased.However, the coverage of K1 and K4 in East Java still has not reached 100%. The purpose of this study was to determine the mother's knowledge and family support for the attitudes of pregnant women regarding ANC in the work area of Gunung Anyar Public Health Center, Surabaya City. This study used a cross sectional study design. The population was 1089 pregnant women and samples were taken using the Slovin formula of 75 people. The statistical test used is Chi Square test with a confidence level of 95%. The results show that pregnant women who have poor knowledge of 46 people (61.3%), pregnant women who get less family support are 28 people (37.3%), and pregnant women who have a negative attitude about ANC of 42 people ( 56.0%). The p-value between mother's knowledge and family support with the mother's attitude about ANC is 0.012 and 0.744. The conclusion is that there is no relationship between maternal knowledge and family support with the mother's attitude about ANC.
The Growth of FHIA-17 Banana Seedlings with Application of Hijauan Paitan Fertilizer (Titonia diversifolia) and Cow Manure Suswati Suswati; Asmah Indrawaty; Rizal Aziz; Eka Prasaditya Ramadhani
Budapest International Research in Exact Sciences (BirEx) Journal Vol 1, No 4 (2019): Budapest International Research in Exact Sciences, October
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v1i4.480

Abstract

Growth of FHIA-17 Banana Seedlings with the Application of Hijauan Paitan Fertilizer (Titonia Diversifolia) and Cow Manure. The aim of this study was to obtain data on the growth of FHIA-17 banana seedlings after application of T.diversifolia forage and cow manure. Using a factorial Randomized Block Design (CRD) with two treatment factors. The first factor is the forage dose of T. diversifolia (P) with 5 levels, P0=Control; P1=12.5 g kg-1 planting medium (equivalent to 5 tons ha-1); P2=25 g kg-1 planting medium (equivalent to 10 tons ha-1); P3=37.5 g / kg of planting media (equivalent to 15 tons ha-1); P4=50 g kg-1 of growing media (equivalent to 20 tons ha-1). The second factor is the dose of cow manure (K) with 5 treatment levels namely, K0=Control; P1=12.5 g kg-1 of growing media (equivalent to 5 tons ha-1); K2=25 g kg-1 of growing media (equivalent to 10 tons ha-1); K3= 37.5 g kg-1 of growing media (equivalent to 15 tons ha-1); K4=50 g kg-1 planting medium (equivalent to 20 tons ha-1 and repeated 2 (two) times. Observed parameters were plant height (cm), number of leaves, stem circumference (mm), plant wet weight (g), plant dry weight (g). The results of this study indicate that the application of forage T. diversifolia significantly affected plant height and number of leaves. It’s not real with respect to all observational parameters.
Application of Value Analysis Techniques on a Rucksack: A Case Study Utkarsh Tiwari; Omprakash P; V.S. Giri
Budapest International Research in Exact Sciences (BirEx) Journal Vol 2, No 1 (2020): Budapest International Research in Exact Sciences, January
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v2i1.702

Abstract

Manufacturers are allocating more of their resources to achieve customer delight by providing a better quality product and additional features at the lowest possible cost not only to acquire the market for existing product but also to increase and secure the demand for future products.With the increase in trend of travelling, the manufacturers need to meet and exceed the demands of their customers, the most vital demand of travellers are comfortable, reliable and multifunctional backpacks. Therefore, it become a necessity for manufacturers to control the cost and introduce new features to the rucksack.The aim of the paper “Application of Value Analysis Techniques on a Rucksack” is to perform a case study to improve and introduce new features in a rucksack through VA/VE methodology. The essence of value engineering technique involves the critical analysis of the functions of a product over all of its stages and producing a creative and innovative way to achieve the function at the lowest cost. Value analysis is an approach to improve the value of an item or process by understanding its constituent components and their associated costs. It then seeks to find improvements to the components by either reducing their cost or increasing the value of the functions. Upon application of VA methodology, a potential saving and multifunctionality is observed in the rucksack.

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