bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tofu wastewater treatment through a combined process of coagulation-flocculation and ultrafiltration
Authors: Prawati P , Oktariany A , Putri S S , Aditya I , Kartohardjono S 
Published: December 2019

Abstract
Wastewater from tofu industries contain many parameters such as total suspended solid (TSS), total dissolved solid (TDS), turbidity, and chemical oxygen demand (COD). These parameters are present in high amount and can endanger the aquatic environment and also decrease water quality. Several studies have been conducted to reduce these parameters, but still require a longer time which is around 12 to 78 days. This study aims to discuss the processes and methods to reduce TSS, TDS, turbidity, and COD parameters from tofu wastewater. The processes discussed in this study include a combined process of coagulation-flocculation and ultrafiltration (UF). The results of the study show that TSS, turbidity and COD reduced to 60%, 60% and 20%, respectively, in the coagulation-flocculation process, but TDS increased to around 90% because of the neutralization process using Sodium Hydroxide (NaOH) solution. Furthermore, it was shown that the combined process of coagulation-flocculation and UF was able to reduce TSS, turbidity, COD and TDS up to 99%, 99%, 75% and 50%, respectively. All the parameters contained in the water produced from the combined process of coagulation-flocculation and UF was in line with the National Environmental Quality Standard requirements, excluding COD due to the COD content in fresh tofu wastewater is very high.
The integration of social responsibility into business operation: case study of Indonesian manufacturing industry
Authors: Rinawiyanti E D , Huang C , As-Saber S 
Published: December 2019

Abstract
Prior studies argue that CSR should be integrated with business operations to get its benefits. However, the empirical research on how CSR and business operations can be incorporated is still limited. This study aims to investigate how to integrate CSR and business operations and to identify the impact of such integration on company performance. Using a sample of 342 manufacturing companies in Java, Indonesia, PLS-SEM was employed to create a path model depicting the relationships between functional integration and company performance. The results showed that Cost, Quality, Supplier, and Employee, have significant positive relationships on company performance, while Innovation and Customers have no impact on company performance.
Price and inventory policy strategy model in a price sensitive dual channel supply chain structure considering product substitution
Authors: Silitonga R Y H , Christina N 
Published: December 2019

AbstractDual channel supply chain structure, which utilizes both online and traditional offline channel, is widely adopted by a lot of companies. The structure offers better market coverage and profitability. Despite the advantages, it also brings some challenges to coordinate the strategy of the channel. This paper proposes a pricing and inventory policy model to achieve better performance of the structure, where a product substitution was introduced in the offline channel. A price sensitive linear demand function was also incorporated in this EOQ model. The model then evaluated by analysing the profit in two scenarios, the Stackelberg Leadership scenario and Total Profit scenario. The results show that the total profit of this structure is higher under Total Profit scenario, in which the supply chain entities make decision simultaneously. The model also shows that the product substitution gives a positive effect to the profit and become a competitive advantage of the offline channel.
Assessing materials from hoarded mobile phones: hidden e-waste subject for reverse logistics
Authors: Siringo R , Herdiyansyah H , Kusumastuti R D , Lucianto A E 
Published: December 2019

Abstract
The advancement of communication technology is shortening the lifetime of mobile phones (MP), resulting in a phenomenal increase in mobile phones waste (MPW). However, instead of recycling their obsolete devices, customers shelved MPW for the personal data stored inside. This study aims to estimate secondary minerals contained in MPW stockpiled by Indonesians. “Consumption and used” method was employed to assess the quantity of MPW generated in this country based on the data of mobile subscribers. Considering that MP life span was around 3 years, and about 38% of obsolete MP were hoarded by their owners, this study revealed that about 339.69 million units of MPW were waiting to enter the reversed logistics. This volume of MPW may generate economic intrinsic at approximately USD 508 million from valuable metals such as 80,949 Kg of silver, 8,873 Kg of gold, and 2,547 Kg of palladium. It implied that hoarding MPW impedes the noble goal of recycling; that is to promote sustainable materials management (SMM) since mining precious metals from e-waste will reduce the demand of virgin minerals directly extracted from nature and reduce the environmental impact. This paper highlighted that it is imperative to develop a sustainable system to support the mineral supply chain.
Green dynamic capability for enhancing green innovations performance in a manufacturing company: a conceptual framework
Authors: Amaranti R , Govindaraju R , Irianto D 
Published: December 2019

AbstractGreen innovation has become a necessity for companies in line with the demands of environmental requirements. Green innovation is the activity of developing a product or process that is carried out by considering environmental aspects (such as energy savings, pollution prevention, waste recycling, reduction of resource consumption) to reduce the impact of industrial activities on the environment. One of the factors associated with green innovation performance is the company’s dynamic capabilities. This paper proposes a conceptual framework that illustrates the role of companies’dynamic green capabilities on the performance of green innovation in manufacturing companies in Indonesia.
The use of consumer behavior to identify the flow mapping of waste cooking oil: A finding from Semarang, Indonesia
Authors: Hartini S , Sari D P , Utami A A 
Published: December 2019

Abstract
Management of waste cooking oil is expected to receive more concern nowadays. As a daily consumed good, cooking oil generates a huge amount of waste. Besides, the potency of WCO to cause environmental damages such as water pollution is also inevitable. Adopting the concept of a circular economy, WCO is actually convertible into other value-added products such as soap or fuel. However, in practice, WCO is at scattered points. This paper identified the flow mapping of WCO in Semarang Indonesia as a baby step before stakeholders arrange the further move. Based on the survey that is conducted to 347 households and 146 culinary enterprises, it is known that 90% of households and 67,6% of culinary enterprises disposed the WCO to drains, land, or trash. There is also a small number of participants who give or sell the WCO to 3rd parties such as garbage collectors, oil collectors, household assistants, relatives, and others. WCO-recycling is only carried out by 0,9% of household and none of culinary enterprises.
Perceived kansei and performance-based usability impact on satisfaction for web-based applications
Authors: Hartono M 
Published: December 2019

Abstract
Kansei Engineering has been applied intensively for product design and development considering the deepest layer of customer needs, known as Kansei, which is related to emotional need or affect. This method has been extended into service design and innovation. It has been shown that Kansei’s impact on customer loyalty is equally important as that of cognition or performance. A recent research in investigating the proportional effect of Kansei and performance on usability measurement for e-services has been conducted. It shows that both Kansei and performance is found to be equally significant as well. Then, a question is raised, whether they are antecedent of customer satisfaction. This study is proposed to investigate both perceived Kansei-based and performance-based usability measures on satisfaction. Both theoretical and practical implication is highly expected due to the growth of more human-computer interaction (HCI) features and services nowadays. A proposed applicative framework followed by an empirical study on how the perceived Kansei and performance-based usability impact on satisfaction for web-based applications is discussed.
Measurement of student satisfaction and loyalty using service quality model for higher education (HedQual) at industrial engineering department University of Pelita Harapan
Authors: Hartono N , Laurence  , Tjahjadhi B F 
Published: December 2019

Abstract
The Department of Industrial Engineering (IE) at Pelita Harapan University (UPH) strives to continually improve the quality of its services. Previous studies were conducted in 2010 and 2015 using service quality model from Parasuraman. IE UPH wants to increase their student satisfaction; therefore, IE UPH needs to measure it with a customized model because of the distinctive nature of the service. This study develops the ServQual Model for IE UPH, which is named HedQual. The HedQual is predicted to have a positive influence on the students’ satisfaction and loyalty. The most important construct of service quality for IE UPH Students was also measured using consensus. Data collection was done using a questionnaire and distributed to all IE UPH students. The model was tested using PLS-SEM (Partial Least Square – Structural Equation Modeling). The final model shows that HedQual consists of Academic and Non-academic. HedQual, Reputation and Learning Outcome have a significant and positive effect on Student Satisfaction. Student Satisfaction has a significant and positive effect on Student Loyalty. The most important service quality for IE student from the consensus calculation is the attitudes and sincere interests of lecturers in helping the students.
Organic-inorganic nanocomposite membranes for molecular separation and bioapplications
Authors: Hou J , Sutrisna P D , Li L , Chen V 
Published: December 2019

Abstract
Novel porous materials like metal organic frameworks have shown good promise in catalysis, separation, sensing and adsorption. Compared with the conventional polymeric membranes, metal organic framework membranes usually exhibit higher separation efficiency. However, there are still many challenges which need to be addressed, like the interfacial compatibility within the mixed matrix membrane, defective engineering and stability of the framework stability. We will discuss our strategies to solve these problems towards better membranes. On top of the conventional separation membranes, metal organic framework materials can be applied to construct the artificial cellular membranes for bioentities and even living cells. The porous crystal provides exoskeleton to protect the soft biomolecules and their combination can enable a series bioapplications like catalysis, drug delivery and drug release.
Tensile Properties of Kenaf Fiber by Alkalinization Treatment: Effect of different concentration
Authors: Ismojo  , Zahidah K A , Yuanita E , Kustiyah E , Chalid M 
Published: December 2019

Abstract
The structure that plays an important role in the mechanical properties of natural fibers that will be used as reinforcement in polymer composites is crystalline cellulose. Chemical treatment is one method that is currently widely used for modifying the chemical composition of natural fibers to obtain fibers with high crystalline cellulose content. In this study, alkali treatment with variations in NaOH concentration was used to modify the surface of kenaf fibers. The effect of alkalinization treatment on the tensile properties of kenaf fibers has been carried out. The fiber is soaked in a sodium hydroxide solution with variations in concentrations of 4, 6, 10 and 15% by weight for 3 hours at room temperature and continued with the washing and drying process. Samples were then tested by tensile testing and characterized by using FTIR and FE-SEM instruments. Tensile testing of untreated and treated fiber is carried out 5 times for each variable. Based on the results of these experiments showed an increase in tensile strength of all treated fibers compared to untreated fibers and the highest maximum tensile strength was obtained from the treatment of alkalinization of fibers at a concentration of 10%. This result was also confirmed by the results of FTIR and FE-SEM characterization which have shown a decrease in amorphous content in kenaf fibers and fibrillated bundle fibers into fiber elements.
The Role of Ergonomics in Suporting Supply Chain Performance in Manufacturing Companies: a Literature review
Authors: Sampouw N , Hartono M 
Published: December 2019

Abstract
Nowadays companies are required to work more productive yet maintain good quality. To increase productivity, company needs a conducive effort to optimize the work system. Supply chain management (SCM) is one form of competitive advantages that is applied to every industrial system. There are many factors which can influence the supply chain performance (SCF).Ergonomics is deemed to be one of significant drivers for SCF. This paper proposes and discusses the concepts related to ergonomics which is considered as macro ergonomics in supply chain system. SCM has been seen as macro ergonomics concerning on organization, people, technology, information and resources. This paper shows the importance of ergonomics at the inbound logistics (includes receiving, storing, inventory control and internal distribution management) and outbound logistics (the activites to get the finished product to customer) which are regarded as the critical supply chain activities. A scientific literature review on ergonomics as a critical determinant for SCF is discussed and provided as a theoretical contribution for further research related to the role of ergonomic to support supply chain performance.
The use of pyrolusite to remove Pb and Cd in aqueous solutions: isotherm and thermodynamic
Authors: Fransiscus Y , Kembie M W B , Tanusaputra N M 
Published: December 2019

Abstract
The utilization of natural material as an adsorbent to eliminate contaminants in the water is of great interest. Natural material can be directly used without further treatment that may lead to higher environmental impact. In this study, pyrolusite which is immensely available in Indonesia, especially in East Nusa Tenggara, was used to adsorb Cadmium (Cd) and Lead (Pb) in a single and simultaneous condition. Several operational parameters such as initial concentration, pH and temperature were applied to elaborate the sorption mechanism and to determine the adsorption capacity. The amount of absorbed Cd and Pb increased at a higher pH and reached the optimum condition at pH 7 for both. The adsorption isotherm for both adsorbates were best modeled following the Langmuir equation, giving an adsorption capacity as high as 108.70 mg/g and 123.45 mg/g for Cd and Pb respectively. Additionally, the thermodynamics data showed that the adsorption process in this study was endothermic process.
Power generation in a plant-microbial fuel cell assembly with graphite and stainless steel electrodes growing Vigna Radiata
Authors: Pamintuan K R S , Sanchez K M 
Published: December 2019

Abstract
Plant-microbial fuel cells (PMFCs) are an interesting renewable energy technology that has the potential to generate clean electricity without competing with agriculture for land space. In this study, the electricity generation potential of mung beans (Vigna radiata) in a PMFC set-up with different electrode materials was explored. Three types of set-ups were prepared with five replicates each: PMFCs with stainless steel electrodes, PMFCs with graphite electrodes, and control pots without electrodes. This experimental set-up allowed for the evaluation of the better electrode material, and whether the PMFC environment harms or benefits the plants. The voltage gathered suggests that the potential difference generated in the PMFCs with differing types of electrodes were statistically the same (α = 0.05). The same can be said for power and power density, although the system with stainless steel electrodes generated more power towards the end of the experiment. It was also evident that PMFCs with stainless steel electrodes experienced prolonged time lags due to the reduced biocompatibility of stainless steel. Polarization studies showed that a single PMFC is capable of generating power densities of 0.35 mW/m2 and 0.12 mW/m2 for stainless steel and graphite systems, respectively. The increased power density of PMFCs with stainless steel indicate the lowering of internal resistance brought by the stainless steel. Plants in the PMFCs set-ups were seen to grow faster, taller, and have higher pod output than those in the control set-up. These results indicate that the PMFC technology can be implemented in agricultural land for the continuous generation of passive electricity while growing food crops, eliminating the competition between energy generation and agriculture.
Gas sensitive properties of ZnO nanorods formed on silicon and glass substrates
Authors: Petrov V V , Starnikova A P , Varzarev Y N , Abdullin K A , Makarenko D P 
Published: December 2019

Abstract
Nanostructured materials based on zinc oxide are being intensively studied, since such materials are used to create energy harvesters, gas sensors, and solar cells. Arrays of nanoscale ZnO nanorods are synthesized on silicon and glass substrates by the hydrothermal method. The formed ZnO nanorods with predominantly vertical orientation have an average transverse size of about 30–40 nm and a length of 500–600 nm. For electrical contact, V-Cu-Ni metallization was deposited over ZnO nanorods. The work investigated the gas-sensitive and electrophysical properties of the formed sensitive elements with respect to carbon monoxide (CO). It is shown that the sensor element based on ZnO nanorods on glass has a 30% higher sensitivity and lower (10 ppm) sensitivity limit than similar structures, but formed on silicon. Peculiarities of the response of gas sensors based on ZnO arrays of nanorods were determined, including the effect of temperature, the rate of gas flow, and the effect of the substrate. A method for measuring gas-sensitive properties has been developed. It is shown that sensors based on such sensor structures can be used as energy-efficient gas sensors, as well as detectors in early fire detection systems, robotic sensor systems, and other modern technologies.
The study of the properties of lead zirconate-titanate films on silicon substrate after halogen lamps rapid thermal annealing
Authors: Petrov V V , Kamentsev A S , Polyakov V V , Varzarev Y N 
Published: December 2019

Abstract
Ferroelectric thin films of lead zirconate titanate (PZT) are important is creation of ferroelectric MEMS, memory devices, sensors of physical quantities and converters energy. The thermal annealing is used to obtain satisfactory electro-physical parameters and optimal crystal structure PZT films. The rapid thermal annealing (RTA) in comparison with isothermal annealing has a possibility of selective annealing of individual layers of the multilayer PZT composition by selecting appropriate temperature and duration of the RTA. The purpose of this work is to study the phase-structural state of PZT films formed by high-frequency reactive plasma sputtering and subjected to rapid thermal annealing by halogen lamps. The PZT thin films with a thickness of 1.0 ± 0.1 µm were deposited by oxygen atmosphere high-frequency reactive plasma sputtering on silicon (100) substrates and silicon substrates with SiO2 on surface. After applying, PZT film underwent RTA at temperatures of 600-800 °C and with speed 60 degrees/s. With X-ray phase analysis, the structure-phase composition of the PZT film is revealed. Besides that, the effect of RTA was investigated using electron microscopy. It is established that temperature change at RTA leads to a qualitative change in the phase-structural state of the PZT films as compared to their initial state. This gives a chance to use RTA in formation of the PZT films with given parameters.
Temperature Dependence of Electrical Properties of ZnO Nanorods Array
Authors: Petrov V V , Varzarev Y N , Abdullin K A 
Published: December 2019

Abstract
Zinc oxide nanostructures (nanotubes, nanorods, nanowhiskers, etc.) are a promising material for various electronics devices for power system and green energy such as piezoelectric energy harvesters and solar cells. Electrical properties of ZnO nanorods grown on a glass substrate by the hydrothermal method in an aqueous solution of zinc nitrate were investigated in this work. The SEM micrograph shows that the grown nanorods are vertically oriented and the XRD pattern confirms its crystallinity with (002) preferred orientation. The temperature dependent resistivity of ZnO nanorods array measured from 300 to 523 K shows variation in resistance from 5·109 Ω to 3·106 W and temperature hysteresis and region with positive temperature coefficient of resistance at the heating that was not observed at cooling. The origin of this behavior is explained with the two competing processes - thermal generation of electrons and oxygen species adsorption on the ZnO surface. Oxygen adsorption leads to decrease in the number of oxygen vacancies that are electron donors, and consequently to a decrease in conductivity of ZnO nanorods. The values of activation energy of conductivity were calculated from the slope of linear regions on the Arrhenius plot which are 0.246, 1.466 and 0.248 eV for the heating curve and 0.650 and 0.315 eV for the cooling curve.
Current Perspectives and Mini Review on Zeolitic Imidazolate Framework-8 (ZIF-8) Membranes on Organic Substrates
Authors: Sutrisna P D , Savitri E , Himma N F , Prasetya N , Wenten I G 
Published: December 2019

Abstract
Zeolitic Imidazolate Framework (ZIF) membranes have been considered as promising membrane for gas separation processes due to their robustness and good separation capabilities. The separation of hydrogen (H2) from larger gases is one of their potential applications. Among the different types of ZIF, ZIF-8 is considered as potential candidates for H2 separation owing to its small aperture size and excellent chemical stability. In recent years, ZIF-8 membranes have been fabricated on both inorganic and polymeric substrates. The fabrication of the ZIF-8 layer on polymeric substrates is more challenging than its inorganic counterpart because of the incompatibility issue between organic substrates and ZIF-8. However, the flexible nature of polymeric substrates offers better mechanical stability at high pressure than inorganic substrates. The purpose of this mini-review is to present the state of the art and challenges of research on ZIF-8 membrane synthesis on different polymeric substrates. These challenges include the formation of cracks and defects due to compatibility issues and membrane stability at different operating conditions. Current research results showed excellent gas separation properties of ZIF-8 membranes on polymeric substrates that can surpass the trade-offline of gas permeability and selectivity.