The Empowerment of Waste Utilization Industry Based on Greenpreneurship

Intan Novela QAa,Sri Murnib and Sri Wahyu Agustiningsih People&Global Business Association 2015 Global Business and Finance Review Vol.20 No.2

Recently, global warming has become serious issue and evokes a great challenge faced by humankind. Wastes become one of the contributors to environmental degradation if not managed properly. Independent participation from resident is needed to manage the wastes effectively and efficiently. Problems in this study are how to develop an independent waste management and community empowerment in independent waste management based on greenpreneurship. This study is gradual development of Yogyakarta. The first year study result shows that Sukunan village residents need training in design and product made from waste, especially Styrofoam and glass wastes to be used as raw material to make brick, concrete buis, and ornaments. The residents also need training in technology model, equipment, greenpreneurship spirit, and managerial concept which are needed to find and seize market opportunities. Thus the researcher develops module and training as well as providing supporting equipments needed by the residents.

Monitoring pyrethroid resistance in field collected Blattella germanica Linn. (Dictyoptera: Blattellidae) in Indonesia

Intan Ahmad,SRIWAHJUNINGSIH,Sita ASTARI,Ramadhani Eka PUTRA,Agus Dana PERMANA 한국곤충학회 2009 Entomological Research Vol.39 No.2

The German cockroach, Blattella germanica, is a major and the most common pest in public areas in Indonesia. Although intensive control measures have been carried out to control the populations of this pest, results have been far from successful, which is believed to be because of its resistance to insecticides. A standard World Health Organization (WHO) glass jar test was carried out to determine the resistance level of this insect to pyrethroid insecticides, the most commonly used insecticides for cockroach control in Indonesia. A susceptible S1 strain collected from Tembagapura Papua was compared with four strains collected from Bandung, West Java: strain S2, from a local restaurant; strain S3, from the Bandung train station; and strains S4 and S5, from two different hotels. All strains showed low resistance to the pyrethroid, except the S5 strain, which had a Resistance Ratio (RR)50 of 95 for permethrin. The addition of piperonyl butoxide (PBO) suggests that the detoxifying enzyme mixed function oxidases (MFO) played an important role in the development of resistance to permethrin in the S5 strain, suggested by the high Synergist Ratio (SR) of 70.4. However, the low level of resistance to cypermethrin was not affected by PBO, suggesting that other mechanisms of pyrethroid resistance are involved. Our study is the first report of German cockroach resistance to permethrin in Indonesia, and the findings can be used in formulating potential strategies for cockroach resistance management.

Gender Gap on the Selection of Metacognitive Online Reading Strategies by EFL College Students

Intan Pradita 아시아영어교육학회 2020 The Journal of Asia TEFL Vol.17 No.4

Fuzzy Logic Model for Deodorizer Troubleshooting in Palm Oil Refining

Intan Suhairi Salleh,Khairiyah Mohd-Yusof,Gholamreza Zahedi 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10

Deodorizer failure roots from many sources that disrupting plant operation. A correct action for remedies during troubleshooting can save company time and profit. In this study based on real plant data, a fuzzy logic model was developed to troubleshoot the root cause of problem for deodorizer failure. An abnormality of deodorizer root cause of problem was monitored through normal condition baseline. In order to build the fuzzy troubleshooting system, the linguistic data was gathered by interviewing palm oil refining plant workers that included experienced plant operators, supervisors and executives. Numerical data were collected by reviewing Standard Operating Procedure (SOP), Process and Instrumentation Diagram (P&ID), plant manual, etc. Root cause of deodorizer failure was separated into seven categories: Fatty Acid Distillate (FAD), cooling tower, hotwell, sparging steam, High Pressure Boiler (HPB), other vacuum parameter and others. The proposed model was successfully able to predict the action needed for deodorizer failure. The model can be employed for training to inexperience workers and operators.

Color Properties of Paulownia tomentosa and Pinus koraiensis Woods after Oil Heat Treatment and Air Heat Treatment

( Intan Fajar Suri ),( Byantara Darsan Purusatama ),( Jong Ho Kim ),( Go Un Yang ),( Denni Prasetia ),( Nam Hun Kim ) 한국목재공학회 2021 한국목재공학회 학술발표논문집 Vol.2021 No.1

This study aimed to determine and compare the wood discoloration of Paulownia tomentosa and Pinus koraiensis woods after oil heat treatment and air heat treatment to provide valuable information for further utilization of these species. The discoloration of heat treated wood was determined by the CIE-Lab color system. Oil and air heat treatment was carried out at temperatures of 180, 200, and 220℃ for 1, 2, and 3 hours. Lightness (L*) in both heat treatments decreased with increasing temperature and duration. Oil heat treated samples showed a higher reduction in L* value than samples treated with air heat. The great extent of L* change is showed in Paulownia tomentosa. The red/green (a*) chromaticity in both woods increased at 180 and 200℃ and remained nearly the same at 220℃. The yellow/blue chromaticity (b*) in both wood samples treated in hot oil and hot air increased at 180℃, but decreased greatly with increasing duration at 200 and 220℃. Overall color change (ΔE*) in oil heat treatment and air heat treatment increased with increasing temperature, indicating higher values for Paulownia tomentosa compared to Pinus koraiensis. In conclusion, it was revealed that there were several differences in the effect of heat treatment methods on the color change between the two types of wood. Oil heat treatment can reduce processing time and is a more effective method than air heat treatment for improving wood color using low temperatures.

Fast Convolutional Method for Automatic Sleep Stage Classification

Intan Nurma Yulita,Mohamad Ivan Fanany,Aniati Murni Arymurthy 대한의료정보학회 2018 Healthcare Informatics Research Vol.24 No.3

Objectives: Polysomnography is essential to diagnose sleep disorders. It is used to identify a patient’s sleep pattern during sleep. This pattern is obtained by a doctor or health practitioner by using a scoring process, which is time consuming. To overcome this problem, we developed a system that can automatically classify sleep stages. Methods: This paper proposes a new method for sleep stage classification, called the fast convolutional method. The proposed method was evaluated against two sleep datasets. The first dataset was obtained from physionet.org, a physiologic signals data centers. Twenty-five patients who had a sleep disorder participated in this data collection. The second dataset was collected in Mitra Keluarga Kemayoran Hospital, Indonesia. Data was recorded from ten healthy respondents. Results: The proposed method reached 73.50% and 56.32% of the F-measures for the PhysioNet and Mitra Keluarga Kemayoran Hospital data, respectively. Both values were the highest among all the machine learning methods considered in this study. The proposed method also had an efficient running time. The fast convolutional models of the PhysioNet and Mitra Keluarga Kemayoran Hospital data needed 42.60 and 0.06 seconds, respectively. Conclusions: The fast convolutional method worked well on the tested datasets. It achieved a high F-measure result and an efficient running time. Thus, it can be considered a promising tool for sleep stage classification.

Properties of Heat-Treated Paulownia tomentosa and Pinus koraiensis Woods in Oil and Air

( Intan Fajar Suri ),( Byantara Darsan Purusatama ),( Jong Ho Kim ),( Go Un Yang ),( Denni Prasetia ),( Nam Hun Kim ) 한국목재공학회 2021 한국목재공학회 학술발표논문집 Vol.2021 No.1

The objective of this study was to determine and compare the effects of the heat treatment in oil and air on the physical and mechanical properties of Paulownia tomentosa and Pinus koraiensis woods. The heat treatment in both oil and air was conducted at 180, 200, and 220℃ for 1, 2, and 3 hours. The characteristic change of the heat-treated woods, such as weight, density, volume shrinkage, compression strength, and hardness, was determined. Heat treatment in oil also caused a considerable increase in weight and density, but the weight and density of air heat-treated wood decreased slightly. Oil heat treatment exhibited lower volume shrinkage compared to air heat treatment. Compressive strength increased by oil heat treatment at all temperatures, while in air heat treatment the compression strength increased at 180 and 200℃ and rapidly decreased at 220℃. The hardness of oil heat-treated Pinus koraiensis wood increased, but vice versa in Paulownia tomentosa woods. In air heat treatment, both wood species showed a decrease in hardness. In conclusion, it is revealed that there were some differences in the effect of physical and mechanical properties caused by heat treatment methods between both wood species and that oil heat treatment is more effective method to improve some properties compare to air heat treatment.

Properties of Gmelina arborea and Melia azedarach Woods after Oil-Heat Treatment

( Intan Fajar Suri ),( Byantara Darsan Purusatama ),( Jong Ho Kim ),( Jae Ik Jo ),( Seong Hyun Kim ),( Do Hoon Kim ),( Wahyu Hidayat ),( Fauzi Febrianto ),( Nam-hun Kim ) 한국목재공학회 2020 한국목재공학회 학술발표논문집 Vol.2020 No.1

The objective of the study was to evaluate the effect of oil-heat treatment on the anatomical, physical, and chemical properties of gmelina (Gmelina arborea) and mindi (Melia azedarach) wood. Oil-heat treatment was conducted at 180°C, 200°C, and 220°C. Anatomical characteristics, such as the dimension of vessel and fiber was observed by scanning electron microscopy. The results showed that vessel lumen area and vessel diameter in radial and tangential direction of both gmelina and mindi increased with increasing temperature. The lumen areas of fibers and total are of fibers in both woods were decreased by oil-heat treatment, and the wall area of fiber increased with increasing temperature. Weight change, density, and dimensional swelling were also measured. Both woods tended to gain weight after heat treatment at 180°C and 200°C, and then lose weight after heat treatment at 220°C. The density of mindi increased at 180°C and 200°C and decreased slightly at 220°C. However, the density of gmelina seems did not change after the treatment. Dimensions of the specimens in the tangential direction increased by heat treatment, but the rate decreased with increasing temperature. Consequently, it was revealed that the oil-heat treatment affected to change anatomical and physical properties of gmelina and mindi woods.

Cell-based biosensor: A new tool to characterize stem cell pluripotency and differentiation

Intan SUHITO,Sung-Hwan MOON,Hyuk-Jin CHA,Tae-Hyung KIM 한국생물공학회 2018 한국생물공학회 학술대회 Vol.2018 No.10

Utilization of PTE and LDPE Plastic Waste and Building Material Waste as Bricks

Intan, Syarifah Keumala,Santosa, Sandra Materials Research Society of Korea 2019 한국재료학회지 Vol.29 No.10

Plastic waste is becoming a problem in various countries because of the difficulty of natural decomposition. One type is PET plastic(Polyethylene Terephthalate), which is often used as a bottle for soft drink packaging, and LDPE(Low Density Polyethylene), which is also widely used as a food or beverage packaging material. The use of these two types of plastic continuously, without good recycling, will have a negative impact on the environment. Building material waste is also becoming a serious environmental problem. This study aims to provide a solution to the problem of the above plastic waste and building material waste by making them into a mixture to be used as bricks. Research is carried out by mixing both materials, namely plastic heated at a temperature of $180-220^{\circ}C$ and building material waste that had been crushed and sized to 30-40 mesh with homogeneous stirring. The ratios of PET and LDPE plastic to building material waste are 9 : 1, 8 : 2, 7 : 3, 6 : 4 and 5 : 5. After heating and printing, density, water absorption and compressive strength tests are carried out. Addition of PET and LDPE plastic can increase compressive strength, and reduce water absorption, porosity and density. A maximum compressive strength of 10.5 MPa is obtained at the ratio of 6 : 4.