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Get PDFEditorial Team of International Journal of Offshore and Coastal Engineering Vol 5, No 1 (2021
Batu Bata Ringan Dengan Filler Paduan Serat Ijuk Aren dan Sekam Padi Terkarbonasi
Get PDFSelama ini keberadaan ijuk aren dan sekam padi terkarbonasi belum di manfaatkan secara maksimal terutama dalam dunia konstruksi yang bersifat non struktural dalam pembuatan batu bata ringan. Secara teoritis penambahan serat dalam pembuatan batu bata ringan dengan filler serat ijuk aren dan sekam padi terkarbonasi mampu menambah kuat tekan pada pasangan batu bata ringan untuk keperluan non struktural, dimana secara terbatas material serat dapat di gunakan dari bahan-bahan alami. Penelitian ini bertujuan unntuk mengetahui pengaruh komposisi tanah liat dari serat ijuk aren dan sekam padi terkarbonasi terhadap karakteristik batu bataringan (berat jenis, sifat mekanik). Hasil penelitian menunjukkan bahwa komposisi terbaik antara batu bata dan filler serta ijuk aren dan sekam padi terkarbonasi adalah komposisi 4.500/50 ijuk/450 sekam, dengan massa jenis 950 g/cm³, kuat tekan 3,012 MPa. Sedangkan batu bata ringan tanpa filler diperoleh massa jenis 1250 g/cm3 dan morfologi yang berpori. Peningkatan komposisi sekam padi terkarbonasi cenderung meningkatkan kekuatan mekaniknya, hal ini menja- dikan batu bata lebih ringan dan memperbaiki sifat mekaniknya
Pengaruh Soil Water Characteristic Curve (SWCC) Pada Pemodelan Tanggul Yang Menggunakan Material Campuran Lumpur Sidoarjo (LuSi) Dan Tanah Lempung
Get PDFBNPB (2016) menyatakan lebih dari 10 kali tanggul penahan lumpur Sidoarjo mengalami keruntuhan. PPLS (2018) telah melakukan penelitian pemanfaatan LuSi untuk tanggul uji. Berdasarkan pengamatan tahun 2019 terdapat retakan pada tanggul ditengarai akibat perubahan karakteristik tanah saat terjadi perubahan musim. Penelitian ini bersifat pemodelan menggunakan data sekunder penelitian terdahulu. Tujuan penelitian untuk mengetahui faktor keamanan konfigurasi geometri tanggul pada variasi muka air tanah dan endapan lumpur dengan pengaruh nilai suction pada SWCC dari data penelitian terdahulu. Hasil pemodelan pada muka air tanah (M.A.T) 0 m rentang angka keamanan 1,7-3,4 dan muka air tanah (M.A.T) -30 m rentang antara 2,4 - 4,6. Pemodelan pengaruh endapan lumpur yaitu saat endapan lumpur rendah (1 m) rentang angka keamanan yaitu 1,8-3,5, untuk endapan lumpur tinggi (3 m) rentang 2,5-7,0. Besar pemampatan segera (Immediate Settlement) semakin tinggi timbunan rentang pemampatan 0,08876 m -0,10107 m dan semakin besar kemiringan tanggul rentang 0,08876 m - 0,02166 m.
Bioethanol Production from Wastewater of Brown Sugar Home Industry in Kediri via Enzymatic Hydrolysis and Fermentation
Get PDFBioethanol is ethanol whose main ingredients are from plants and generally use a pharmaceutical process. Therefore, Indonesia still needs a more effective source of bioethanol as fuel. Bioethanol production from vegetable waste is a realistic solution, one example is waste from the brown sugar home industry. The purpose of this research is to innovate the production of bioethanol by utilizing sap sugarcane waste in a brown sugar industry home using the Enzyme Hydrolysis and Fermentation Method. The process of making bioethanol is the raw material preparation stage, the hydrolysis stage, and the fermentation stage. The first stage, the preparation of raw materials is done by filtering the molasses waste and then dissolving it with distilled water in 2000 mL Erlenmeyer. the second stage, the hydrolysis stage, is to hydrolyze the molasses solution according to the predetermined ratio variables, by going through two stages in the hydrolysis stage, namely liquefaction and saccharification. In the liquefaction process, -amylase is added at a temperature of 90oC and heated on a hot plate stirrer for 2 hours. Then the saccharification stage was carried out by adding the enzyme gluco-amylase at a temperature of 65oC for 4 hours. The third stage, the fermentation stage, was carried out with variations of bread and yeast tape with the additional variables of 5%, 10%, and 15% nutrient (2% urea and 3%). Fermentation will be carried out for 3 days. The results showed that the maximum sugar content was achieved by using a concentration ratio of sugarcane juice: water = 1:0 with an enzyme hydrolysis process of 196.08 g/L. The maximum bioethanol content after fermentation was 18.6% and reducing sugar of 10.98 g/L was achieved by using 10% baker's yeast at a concentration of sugar cane juice: water ratio = 1:1. The maximum bioethanol content after the fermentation process was 12.96% and the reducing sugar was 27.78 g/L was achieved using 10% tape yeast at a concentration ratio of sugarcane juice: water = 1:1
Determination of Conventional Transportation for ADL Pathway in Malang City
Get PDFThe number of conventional microbus transports with passengers can be seen from the comparison between capacity in a trip t.hat is far from the capacity standard. This study uses the Work Sampling and Work Load Analysis theory to determine the optimal needs of the microbus ADL (Arjosari - Dinoyo - Landungsari) route. The study was conducted by observation and interview. The study was conducted by taking samples of microbus and microbus drivers as many as 38 unit of the total number of drivers and minibus available is 42 unit. Data collection by following the driver's activities for 5 days commuting. Record the number of passengers and the productive and non-productive time of the driver by taking into account the Performance Rating and Allowance factors and calculating the driver's workload. The results showed an average driver workload only 49 % with the current active microbus condition with total of 42 units. The researcher recommends that each minibus driver has an ideal workload of 90%, so the need for ADL line microbuses is 23 units in the hope that the number of passengers will increase
The Influence of Health Facilities Information System Application in The Business Process of Clinic Bunga Melati
Get PDFIn this competitive business era, Klinik Bunga Melati (KBM) has changed its business and management strategies 3 times in the last 2 years with the aim of adjusting internal and external conditions in the health sector and make KBM superior to other competitors. KBM expects the development of technology that can be applied efficiently and integrated between KBM internally. In 2018, KBM teamed up with the Badan Penyelenggara Jaminan Sosial (BPJS) Kesehatan. In this regard, BPJS provides a Health Facilities Information System (HFIS) with the aim of making it easier for health units to make claims. But the leader of the KBM considers HFIS not suitable to be implemented in the KBM Welirang Branch. The KBM Welirang Branch staff must do 2x recapitulation of patient medical records every day. There are quite a lot of variables in HFIS besides self-data, staff must also write data related to diagnosis, details of drugs used, drug costs, and doctor's fees. Based on the KBM leaders interview, this is considered to be very time-consuming and costly because HR has to work 2x more and patients need more time to get action. HOT-Fit method is considered suitable for this research because this model can provide an explanation and provide an evaluation of the application a system in the field of health services from human factors (human), technology (technology), organization (organization) and net benefits. The output of this research is an analysis of aspects that need to be improved and the match rate of HFIS implementation in the KBM Welirang
System Dynamics Model for Improving Salt Quality to Achieve Self-Sufficiency of Industrial Salt
Get PDFSalt is a very important commodity for human life. In addition to consumption, salt is also needed in several industries, including for the Chlor Alkali Plant (CAP) industries, pharmaceutical, and non-CAP industries such as petroleum, salting, and others. The demand for industrial salt in Indonesia continues to increase every year along with the growth and development of industries in Indonesia. However, the salt produced by Indonesian salt farmers is still low in quality and can only meet the needs of consumption salt because they only contain about 94% to 95% NaCl. Therefore, local salt is difficult to be absorbed by with salt-based products industry because its purity level does not meet the industrial standards. As a result, imports of industrial salt will increase because local salt cannot meet the industry needs. This study aims to build a conceptual model in order to improve the quality of salt in Indonesia in order to produce a good quality salt that meet the industrial salt standards and can be absorbed by the industrial sector in Indonesia with system dynamics approach. The results of this study are conceptual models regarding internal and external factors that influence the improvement of salt quality to meet the needs of industrial salt. The model can be used by the government and related parties in developing strategies and policies related to industrial salt cultivation. Further research can be done by developing several scenarios to predict future salt cultivation systems
Designing a Master Program to Cope with the New and Next Normal (VUCA World, Industry 4.0, and Covid 19): a case study
Get PDFIt is not surprisingly that the combination of VUCA World and fast development of Industry 4.0 will become the era of new normal for any organization including but not limited to industries. This new normal will become either Threats and or Opportunities for any organization. Whatever it is, organizations should prepare themselves to face this era of new normal, especially to cope with (the unpredictable) uncertainties, such as the pandemic of Covid 19 and maybe other to come, that impact to the existing operation and future opportunities. At the end the uncertainties directly or indirectly will impact to the sustainability of the business. Therefore, this paper presents a strategic initiative, in term collaboration, between academic and professional to design a master program that cope with this new normal. This paper elaborates the concept of developing skills, upskilling and or reskilling, required to be able to handle uncertainties and complexities in the era of new normal. The concept is simply combining strengths of professional and academic and internalized in a tailored master education program. The concept then operationalized in a multi discipline master program as a case study in a top-notch private industry in Indonesia
Livable Rental Houses for Factory Workers in Industrial Area
Get PDFRental houses as a place to live is a major needs for factory workers. Liveable rental houses can improve the quality of workers life’s in the future, because they have the opportunity to get a livable house in their lives. Therefore, rental houses in industrial areas provided by the private sector for workers should meet livable houses standards. This study was made to determine the feasibility of habitation and evaluate rental housing for workers provided by the private sector, and then formulate the concept of rental houses according to standards or policies for livable houses, the theory of livable houses and the results of research evaluations of rental houses for factory workers in industrial areas. The methods in this research used positivism with primary and secondary data collection techniques through direct observation at the study location, questionnaires for factory workers as tenants, and interviews. who participated in this study were 123 respondents from a total population of 400 units. The concept of decent housing for workers in industrial areas is obtained from the evaluation results of the standard of livable houses, literature studies, and the results of a SWOT analysis. The results of this study, is about the concept of a livable rental houses for workers in an industrial area, including the area of the room in accordance with the provisions of a bunk bed that can occupy four people so that the rental costs can be share by four people, setting the ventilation system with cross ventilation on two sides of the wall for the occurrence of cross ventilation with a ceiling height of 3 meters, the provision of adequate windows for natural lighting during the daytime so as to save electricity consumption. With a air system and good natural lighting will give positive results for the rental house because the house will be far more livable and healthier to live in. This research is expected to be a reference for rental housing owners and the government to make the concept of livable rental housing for workers in industrial areas
Synthesis of Composite Graphene/ Fe3O4 by Electrophoretic Deposition Using Pulse Direct Current
Get PDFComposites Graphene/Fe3O4 have been successfully synthesized by the electrophoretic deposition method using pulse direct current (PDC) on a nickel foam substrate. In this study, we synthesized graphene and Fe3O4 separately before the two materials were composited. We synthesize graphene from coconut shell charcoal and synthesize Fe3O4 from pure iron. Graphene and Fe3O4 which have been formed, are dissolved with demineralized water as a dispersing medium so that a solution of 1.5 mg / mL is obtained which is then compiled layer by layer on the surface of the substrate with variations in deposition time of 10 to 30 minutes at room temperature. This aims to determine the effect of deposition time on the formation of graphene/Fe3O4 composites. The results showed that the use of PDC was able to precipitate graphene/Fe3O4 composites on the surface of the substrate. The use of longer deposition time, results in more graphene/Fe3O4 composites which adhere to the substrate surface. This result is also supported by XRD testing which shows the longer the deposition time, the diffraction peaks appear sharper