The increasing trend of poor quality behavior characterized by low physical activity has fueled the spread of the obesity epidemic. Obesity is a chronic and multifactorial disease and is also called a chronic inflammatory disease which is characterized by an increase in total body fat. The purpose of this study was to determine the relationship between physical activity and the incidence of obe…
Obesity in school-age children is a serious problem as it can cause various health problems that affect the child’s life quality and cause delays in their growth and development. Obesity and its accompanying diseases can be prevented by providing health education about obesity from an early age using methods appropriate to the characteristics of school-age children, one of which is game of Ro…
Obesitas pada anak-anak merupakan permasalahan umum yang serius jika berlanjut hingga usia dewasa karena akan memicu terjadinya berbagai penyakit metabolik dan degeneratif. Pendidikan kesehatan merupakan salah satu upaya yang dapat dilakukan untuk mencegah terjadinya obesitas pada anak. Tujuan penelitian ini adalah untuk mengetahui pengaruh pendidikan kesehatan dengan media video animasi terhad…
Background: Obesity is an accumulation of adipose tissue that is multifactorial in nature, and can cause pathological consequences. Intermittent fasting emerges as a regimen for treating obesity with various types, one of which is the time-restricted feeding type. This study aims to determine the effect of time-restricted feeding on the histological features of inguinal subcutaneous adipose tis…
Cholesterol is a lipophilic molecule that is very important for human life. Total cholesterol includes low-density lipoprotein cholesterol (LDL, or bad cholesterol) and high-density lipoprotein cholesterol (HDL, or good cholesterol). The problem of overweight and obesity occurs in all countries over the world including Indonesia. The prevalence of overweight/obesity has increased over the last …
The transport tank is a horizontal type of pressure vessel used to transport LPG in the oil and gas industry. LPG transport tank pressure vessels result in fatigue in the pressure vessel so fatigue resistance is important for further analysis. The toughness of the material also needs to be analyzed through an experimental approach by adjusting the working temperature conditions of the pressure …
The focus of this research is iron sand processing, iron sand processing activities to be processed using a jig. One of the tools commonly used to separate minerals resulting from repetitive motion is suction and thrust in vertical flow. The applied variable becomes the benchmark for concentrate recovery which is adjusted to the iron sand processing process. Increasing the grade and recovery is…
This study aims to analyze the cost structure and level of technical efficiency and determine the relationship between the cost structure and the level of technical efficiency in the iron and steel industry in Indonesia from 2001 to 2018. The data used is secondary data. The data analysis technique uses the Stochastic Frontier Analysis and Pearson Correlation approaches. The results showed that…
This research compares the methods of iron metal analysis Fe2+ ions using visible spectroscopy and concentration cell potentiometry. The visible spectroscopy method needs to be verified, and the potentiometry method needs to be validated based on ISO 17025:2017, with parameters of linearity, sensitivity, detection limit, quantification limit, accuracy, precision, and measurement uncertainty. Th…
Mineral processing activities are activities to increase the value of minerals. One of the tools commonly used is the Sluice box by using the principle of differences in specific gravity. The applied variable becomes the benchmark for concentrate gain which is as expected. The level becomes the standard for the success of the processing carried out. Application of variable feeding time, tool sl…
This study aims to analyze the influence of dimensions in the manufacture of artificial aggregates made from fly ash using heating techniques. This aggregate is made by combining several other materials through physical and mechanical processes similar to natural aggregates. In this study the materials used for the manufacture of aggregates are fly ash, clay and water. The method used is the he…
Central obesity is a condition where excess abdominal fat accumulates (a abdominal circumference of men is >90 cm and women >80 cm). Indonesia has a prevalence of central obesity at the age of ≥15 years of 31.0%, the prevalence of central obesity in the province of South Sumatra is 27.1% and Palembang City is the highest incidence of central obesity in teenagers ≥15 years number 2 in South …
Pemanfaatan struktur sandwich alumunium dengan lapisan skin besi telah meningkat pesat di industri Indonesia, terutama dalam manufaktur dan penelitian bahan. Material struktur sandwich menarik perhatian peneliti karena kombinasi kekuatan tinggi dan bobot yang ringan. Tujuan penelitian ini adalah merancang dan merekayasa struktur sandwich dengan core alumunium dan skin plat ASTM A36, serta menga…
Background : Obesity is a condition in which there is an accumulation of excessive fat tissue in the body due to an imbalance between energy intake and energy use in an extended time. The rate of obesity in adolescents has increased 10 fold in the last 40 years. Several risk factors related to obesity include: low level of physical activity, high sedentary activity, and high consumption of fast…
This study aims to determine the effect of cutting parameters on screw geometry in the turning process. Data was collected using descriptive analysis techniques. The results showed that the difference in the size of the screw height which was not too significant was at a rotational speed of 100 rpm and a depth of cut of 0.2 mm with a difference of 110.38 µm, while the screw section with a spee…
Zat tanin merupakan salah satu jenis inhibitor yang dapat digunakan untuk menghambat laju korosi, salah satu jenis inhibitor alami yaitu teh. Inhibitor yang digunakan dalam penelitian ini ada dua jenis, yaitu teh hitam orthodox dan teh celup sari wangi dengan konsentrasi 5%. Proses penelitian dimulai dengan perlakuan panas pada baja St42 dengan suhu 750o C kemudian direndam dengan dua jenis var…
Corrosion is material damage due to electrochemical reactions between the material and its environment. This study used medium carbon steel A36 as a test specimen, mango Mangifera foetida leaves as an inhibitor, and 25% NaCl solution as a corrosive medium. Quenching heat treatment is used to apply inhibitors to the test specimens. The purpose of this study was to determine the effect of varying…
Metode penelitian yang digunakan pada penelitian ini adalah metode eksperimen yang bertujuan untuk menguji pengaruh dari media pendingin Tubeless tire fluid terhadap laju korosi yang telah melalui proses quenching. Korosi adalah proses terjadinya perusakan material (khususnya logam) akibat dari faktor lingkungannya. Berdasarkan hasil pengujian selama 3 hari pada larutan korosif yaitu larutan as…
Aluminum-Lithium Alloys Process Metallurgy, Physical Metallurgy, and Welding provides theoritical foundations of the technological processess for melting, casting, forming, heat treatment and welding of Al-Li alloys. it contains a critical survey of the research in the field and presents data on commercial AL-Li alloys, their phase composition, microstructure and heat treatment of the ingots, s…
Normalizing is the process of heating steel to the austenite phase, and cooling it in open air to 27°C. Thus causing the structure in the material to change initially due to loading. In this study, st 37 steel specimens were used. The aim of this study was to observe the effect of variations in holding time in the normalizing process. The holding time used is 20 minutes, 30 minutes and 45 minu…
Fatigue is a process of permanent progressive localized structural change in a material that occurs due to repeated stresses and strains below the acceptable stress limit for the material and at a certain point in time it will cause cracks and then fractures. thoroughly after certain fluctuations. The damage from this failure is called fatigue failure. The study was conducted using a fatigue te…
This study discusses the fatigue resistance of leaf spring construction steel with repeated torsion loading. In this test, the leaf spring steel is stressed repeatedly in order to get the required results. The study was conducted using a fatigue test tool with the repeated torsion method. The material being analyzed is leaf spring steel. The test was carried out using 5 variations of different …
Fabrication of Polyethersulfone (PES) membrane by adding Tin Dioxide (SnO2) using the flatsheet method. In this study, the effect of the addition of SnO2 will be analyzed to determine the mechanical properties of the membrane, as well as the performance of water treatment. The PES@ SnO2 membrane was characterized by SEM and the pore size was uniform until the addition of SnO2 reduced the surfac…
Pasir besi berada pada urutan ke empat terbanyak unsur yang membentuk bumi. Penyebaran pasir besi di Indonesia terdapat di Pulau Sumatera, Jawa, dan Sulawesi. Pasir besi merupakan sumber besi yang dalam pemanfaatannya masih belum optimal khususnya di Indonesia. Namun, produksi pasir besi meningkat dari tahun ke tahun di Indonesia. Salah satu pemanfaatan pasir besi yang dilakukan pada penilitian…
Iron sand is sand consisting of grains of sand containing magnetic elements of iron and some other minerals, so that the amount of iron content in the grains of sand is not the same. Iron sand is one of the mining materials in Indonesia which is exploited on a large scale. Iron sand is usually found in the mountains, along rivers and is mostly found on the coast. These include along the west co…
Iron sand is a sand deposit that contains various minerals, including the mineral hematite (Fe2O3) which is one of the materials used in the manufacture of concrete reinforcing steel. The level of Fe2O3 in iron sand used as raw material for reinforcing steel in concrete must be in accordance with the Indonesian National Standard for raw materials for making reinforcing steel, which is 60.44%. G…