bluuebunny/crossref_metadata_2025 huggingface dataset:
The use of mobilenet v1 for identifying various types of freshwater fish
Authors: Suharto E , Suhartono  , Widodo A P , Sarwoko E A
Published: June 2020

In recent years, the business opportunities for freshwater fish potential utilization are very promising. Freshwater fish including pomfret, Nile tilapia, carp, goldfish, tilapia fish, snapper fish, and catfish have great economic value. They are usually exported in living conditions to several countries such as Singapore, Japan, Hong Kong, Taiwan, and Malaysia. The business of fish particularly freshwater fish is one of the national income sources. As the forms of fish vary, it is important to distinguish the types of freshwater fish utilizing object detection. This detection can be done by implementing deep learning. MobileNet V1 is a deep learning model that can be used for object detection or image classification. MobileNet V1 can work on smartphones or other embedded devices that still produce high-level accuracy. In this study, MobileNet V1 was trained with learning rate parameters 0.0004 and epoch 20.000. The use of these parameters obtained an accuracy rate of 90% in the detection of types of freshwater fish.
The best architecture selection with deep neural network (DNN) method for breast cancer classification using MicroRNA data
Authors: Ginanjar S , Suhartono  , Wibowo A , Sarwoko E A
Published: June 2020

Breast cancer is one of the most common causes of death in the world. One way that can be done to reduce the number of death cases is to do early detection using MicroRNA data. MicroRNA is one of the cancer biomarkers that can help in the classification process. MicroRNA can be used to identify whether a cell is a cancer cell or not even in the earliest stages. The deep Neural Network (DNN) method consists of two or more layers of self-learning units (hidden units). The weight of hidden units that are fully connected between two layers can be learned automatically. However, DNN still has a weakness which is the changes in the distribution of each layer’s inputs that cause problems, because the layers need to continue to adapt to the new distribution and produce less optimal accuracy values. This research was conducted to get the best architectural selection of the DNN method used for breast cancer classification using MicroRNA data. The results of the DNN method with the best architecture obtained was 3 hidden layers with 200 hidden units each, 30% dropout rate in the combination of the ReLU, ReLU, ReLU activation functions and the learning rate of 0.04 resulting in the highest accuracy of 94.58% with a specificity of 96.45% and sensitivity of 91.02%.
Evaluation of student academic performance using e-learning with the association rules method and the importance of performance analysis
Authors: Ramadiani R , Kurniawan A , Arifin Z , Jundillah M L , Alex R , Azainil A , Hidayanto A N
Published: June 2020

In managing the student study process, there is a pattern that occurs repeatedly every year. The recurring data will produce information in the form of student profiles, entry paths, student academic results, study period, average graduate-level and much other information as long as students take the process of teaching and learning activities. This research was conducted to predict student performance and e-learning satisfaction at the Computer Science department in Mulawarman University using the Association Rules method and Importance Performance Analysis. The sample in this study was 389 data of computer science graduate students. Based on the results of the research that has been done, it can be concluded that the graduation rate of computer science students of the Faculty of Computer Science and Information Technology, as follows; students who have graduated most have a GPA interval of 2.76 - 3.50 with male gender and take a study period of more than 6 years which has a support value of 0.321 and a confidence value of 0.628. Their perception of e-learning according to IPA coordinates community, collaboration, materials, social media, knowledge, synthesis, application, understanding, multimedia, evaluation, video, and news in quadrant II has a high level of importance with a relatively high level of performance and must be maintained.
QoS of network infrastructure in a wireless sensor system for real-time measurement pH parameter of fishery
Authors: Ghozali M I , Sugiharto W H , Susanto H , Budihardjo M A , Suryono S
Published: June 2020

The problem of mass fish mortality in Indonesia is already common and generally occurs. Environmental conditions determine the survival of fish. Acidity (pH) is one of the important things in determining the water quality of water. real-time information about pH water is important to avoid the danger of mass fish dies because of unhandled water pH. Network Infrastructure devices comprise those devices that facilitate the movement of data along with the communication media. the difference between the station distance and the wireless access point does not affect the change in the bitrate of each station QoS measurements based on data distribution delay. Shows that if the wireless sensor’s connectivity in sending data acquisition pH from the node station to the web service, Delay data transmission affects the accuracy of the measurement and presentation of data on the cloud server.
Development of a smart parking system based on internet of things using object-oriented analysis and design method
Authors: Maulana M F , Adhy S , Bahtiar N , Waspada I
Published: June 2020

Smart City is one of the Smart Initiatives that tries to provide solutions to parking problems that are found in big cities. The growth of the vehicle population is not matched by the growth of parking infrastructure, which raises various problems such as illegal parking, traffic jams, and driving safety. Thanks to the massive evolution of the Internet of Things, the Smart Parking idea became a breakthrough in solving the growing parking problem. In this paper, we explain the prototype development of the Smart Parking System using the Internet of Things which has three subsystems, namely embedded systems, as well as Android and web-based applications. Smart Parking System’s software was developed using the Object-Oriented Analysis and Design (OOAD) method and has been tested using black-box testing with 41 test cases that were successfully received.
The role of the analytic hierarchy process (AHP) algorithm in health care services
Authors: Citrawati D H D , Widyawati M N , Suryono S
Published: June 2020

Improvement in quality health care has now become a must that both developed and developing countries work on improving their health care system, especially in midwifery emergencies, using information systems. UNICEF has developed a midwifery referral system with its program known as Expanding Maternal and Newborn Survival to speed up the referring process. AHP is one of the information system procedures that support decision making to speed up the determination of health care facilities. This research discusses some journal articles by conducting a detailed analysis of their preliminary studies, research objectives, achievement indicators, variables, and methods used. It is expected that readers can briefly learn some benefits of AHP in health care. This research employed the PRISMA protocol guidelines. Chosen journal articles are full papers published in reputable journals. Inclusion and exclusion criteria were also implemented in choosing proper journal articles for this systematic literature review. It is found that the implementation of AHP in any type of health care service has proven to be very effective. It is expected that this literature review can serve as a reference for the implementation of AHP in health care based on practice evidence.
Identifying IT governance condition (case study: KPRI-UNDIP)
Authors: Nugraheni D M K , Noranita B , Saputra R , Pratama Y
Published: June 2020

Koperasi Pegawai Republik Indonesia Universitas Diponegoro (KPRI Undip) consists of various service units. One of them is Unit Simpan dan Pembiayaan that provides savings and loan services from and only to members. Currently KPRI UNDIP already uses computer-based accounting systems and information system that can help administrative and operational processes become effective and more efficient. This research aim is to identifying IT IT Governance condition using COBIT 5 framework. From the mapping process the scope of IT governace audit are EDM01, EDM02, EDM05, APO10, BAI06, DSS01, DSS02, DSS03, DSS04, DSS06, and MEA0, which selected to identify IT governace KPRI UNDIP condition. The result is that in domain EDM01, EDM02, EDM05, APO10, BAI06, DSS03, DSS04, DSS 06 and MEA01 at level 0. As for the domain DSS01 and DSS02, and DSS06 are at level 1.
Case study of malaria patients: distribution of cases and maps of Anopheles sp. breeding place in Kaligesing sub-district, Purworejo district
Authors: Wijayanti E P N , Martini M , Hestiningsih R , Wuryanto M A , Yuliawati S , Mawarni A
Published: June 2020

Malaria has been a health problem in Indonesia, including in sub-district Kaligesing, district Purworejo of Central Java Province. Malaria has also been identified as an endemic especially in the villages of Jatirejo, Kaliharjo, and Somongari. The purpose of this study was to describe the epidemiology of malaria incidence based on distribution of cases, surrounding house related cases, and the Anopheles breeding place of malaria vectors. This descriptive based research with a case study approach investigated 61 malaria cases as respondents from 2016-2018 in Jatirejo, Kaliharjo and Somongari Villages sampled using total population method. The chosen variables were behaviour and environment of the respondents in relation to the presence of Anopheles vector breeding grounds. Data were analyzed descriptively and displayed in tables and maps. The results of the analysis showed that the average age of the malaria sufferer was 34 years old, male (60.7%), and most of them (45%) were coconut farmers. The most common symptoms of malaria experienced by respondents were fever, chills, headaches, and night sweats. In addition, 24.6% did not use insecticide-treated netting while sleeping. Spatially, the highest distribution of malaria cases was identified in Jatirejo Village, as its topography is plateau with a plantation area. Meanwhile, the existence of breeding places was found surrounding respondents’ houses. To prevent from having malaria, people have been advised to take precautions by wearing long clothes when going out at night, using repellents/anti-mosquito treatments, providing larvicides at breeding sites around their house.
Signal to noise ratio and anatomical information of T1-weighted spin echo and T1-weighted SPIR in post-contrast brain MRI metastases case
Authors: Daryati S , Ribuana E , Sulaksono N , Indrati R , Setiawan A N
Published: June 2020

Brain MRI examination using contrast media can improve detection of brain metastases. The fat saturation technique is recommended to suppress large amounts of signals from fat and improve contrast enhancement. The purpose of this study was to determine the differences in SNR values and anatomical image information on post-contrast Brain examination between T1-Weighted Spin Echo and T1-Weighted SPIR sequences in metastatic cases. The study is a quantitative experimental. The results of the study were obtained based on Radiologist’s assessment and SNR measurement from gray matter, white matter, ventricular, cerebrospinal fluid, and pathological lesions. Analysis of this research data using the Wilcoxon sign rank test statistic. There is a significant difference between the SNR value of the two sequences. The results in anatomical information showed no difference. T1W sequence Spin echo had better visualization in gray matter, and white matter, while T1W SPIR sequence had advanced in pathological lesions appearance.
Topical ozonated virgin coconut oil improves diabetic ulcer wound healing in diabetic mice model
Authors: Yuniati R , Subchan P , Riawan W , Khrisna M B , Restiwijaya M , Dyan N S , Nur M
Published: June 2020

Diabetic ulcers are open sores on the skin through into the dermis, which if not properly managed, can increase amputation cases. Over the past few decades, ozone generated using plasma medical technology has been investigated to have the ability as an agent that helps wound healing. This study aims to evaluate the effect of topical ozonated VCO on the diabetic wound healing in the diabetic mice model. This study was an experimental study with post-test control design. Ulcer wound model was made in 50 diabetic male Wistar mice. They are divided into 5 groups, the first group (control) was given conventional therapy and the other groups (treatment) were given conventional therapy and topical ozonated VCO with different flow durations (0 min, 90 min, 7 h, 14 h). Then, the characteristics of wound healing (macroscopic and wound lengths) were observed in day 1, 3, 5, 7, and 14. The results of this study showed that the reduction of wound length was proportionally related to the duration of ozone flow. Topical VCO with the longer duration of ozone flow would heal the wound more quickly and had the shortest wound length at the end of the observation. VCO with ozone flow for 14 hours (16837.10 µm) had the biggest reduction of wound length, following by VCO with ozone flow for 7 hours (14209.64 µm), 90 minutes (14071.96 µm), 0 minutes (8531.99 µm), and control group (6370.77 µm). Therefore, we concluded that topical ozonated VCO improved diabetic wound healing process in diabetic ulcer mice model and can be used as adjuvant therapy for diabetic ulcers.
Dynamical analysis model of HIV-1 infection in CD4+T cells with antibody response
Authors: Permatasari A H , Sutimin  , Khabibah S , Munawwaroh D A , Utomo R H S
Published: June 2020

The spread of HIV infection one of which is affected by cell to cell transmission. A dynamical model of HIV-1 infection in CD4+T cells with considering viral transmission from cell to cell and antibody response is constructed in this paper. Antibody response determines viral load in early HIV-1 infection. The existence and stability of the equilibrium is investigated by the basic reproduction ratio. The local stability of uninfected equilibrium is analyzed using Routh Hurwitz linearization. After investigating the local stability, we construct a Lyapunov function to investigate the global stability of endemic equilibrium. Numerical simulation is given to illustrate the control of HIV-1 infection based on the effect of antibody response and the effectiveness of antiretroviral treatment.
Classification of liver cancer with microrna data using the deep neural network (DNN) method
Authors: Purba O H , Sarwoko E A , Khadijah  , Suhartono  , Wibowo A
Published: June 2020

Liver cancer is one of the highest causes of death in the world. According to IARC data in 2018, the number of cases of liver cancer reached 841,080 cases and 781,631 of them declared dead. One effort that can be done to reduce cases of death from liver cancer is early detection by doing a classification on MicroRNA data. MicroRNA can be used to identify whether a cell is a cancer cell or not at the earliest stages. MicroRNA data studied was obtained from the GDC Data Portal of the National Cancer Institute (NCI). The Deep Neural Network (DNN) method is one of the methods that can be used in classifying cancer. Data normalization in the DNN method brings input values with an unlimited range into a limited range of output values. Data normalization at data pre-processing work more optimally by adding activation functions and Batch Normalization in each hidden layer. Different types of normalization and use of different activation functions can be compared to get the best accuracy value for DNN. This study compares three types of data normalization, namely Min-Max, Sigmoid, and Softmax. Whereas the activation functions being compared are ReLU, Sigmoid, and TanH. The results showed the best accuracy for the classification of liver cancer with MicroRNA data obtained using Min-Max data normalization, ReLU activation function, batch normalization with parameters of 2 hidden layers, 200 epochs, and 0.004 learning rate with an accuracy value reaching 98.33%.
Analysis stability of HIV/AIDS epidemic model of different infection stage in closed community
Authors: Munawwaroh D A , Sutimin  , Heri R , Khabibah S U S , Anindita H P
Published: June 2020

Mathematical modeling can describe about how the epidemic model like virus HIV/AIDS interaction with human, from susceptible individual become individual AIDS. Furthermore, the model is built in the acceleration fraction how fast susceptible individuals can be asymptomatic HIV infected individuals. It can be solved to get the point of free disease and its stability, and also to get endemic point and its stability. The stability for the free disease will get from the Routh’s criterion stability, and for the endemic will be analyzed by Lyapunov function. In the paper, the point of free disease will be asymptotically stable if the basic reproduction of the model less than one, and the point of endemic will stable with Lyapunov if the basic reproduction more than one.
Oil content analysis on yam bean fermented by Aspergillus niger
Authors: Megananda R C , Azhizhah Y N , Pujiati  , Primiani C N
Published: June 2020

The richness and diversity of nutrition contained in yam bean (Pachyrhizus erosus) have great potential to be developed in various industries, such as food and health industries. The purpose of this study was to analyze the influence of inoculum’ concentration and duration of incubation by Aspergillus niger on the level of oil content and glucose in fermented yam bean. Three different levels of solid state fermentation using Aspergillus niger molds are grouped as follows: control group (P0), 0.2 ml/g (P1), 0.4 ml/g (P2), and 0.6 ml/g (P3), and three different durations of fermentation are grouped as incubation control (K0), 24 hours (K1), 48 hours (K2), and 72 hours (K3). The oil content analysis was completed using soxhlet extractor and n-hexane solvent. The analysis results showed that the highest level of oil content of 70.15% was at the inoculum level of 0.4 ml/g with the incubation time of 96 hours.
The diversity of fern in Petungkriyono mixed forest Pekalongan, Central Java
Authors: Lestari I , Murningsih  , Utami S
Published: June 2020

Fern are group of seedless vascular plants (Tracheophyta). Fern have a wide distribution in Indonesia. The aim of this study is for know the types of ferns in the mixed forest of Petungkriyono. The reseacrh methode used in the cruised method by exproling the entire mixed forest in Petungkriyono. The number of fern species found in the mixed forest of Petungkriyono is 44 species that belong to 14 families. The Snannon index of fern in mixed forest was 3,09. Therefore Petungkriyono mixed forest having a medium diversity level of fern. Humidity, temperature, light intensity and soil pH in the mixed forest of Petungkriyono are suitable for growing ferns.
The use of magnetic data to enhance fault interpretation of Jabungan area, South Semarang
Authors: Hidayah A S , Harmoko U , Indriana R D
Published: June 2020

Geophysical survey at the Jabungan area (South Semarang) has been done by using magnetic method. The aim of the research is looking for the existence of fault structure at the study area and apply the moving average analysis to sparate of regional-residual anomaly based on the RTP magnetic total anomaly algorithm. The results shows of the residual anomaly map. According to 3D model, it’s can be obtained the existence of fault. It has 0.0222 cgs to 0.0293 cgs of magnetic anomaly, and could be interpreted as Northwest-Southeast lineament of faults. The model also shows the existense of clay, volcanic braccia, gravel, stone, tuff, sand, and sandstone in the study area.
Plasmonic semiconductor nanoparticles showing nonlocal response
Authors: Golestanizadeh Tahereh , Gorter Klaas-Jan , Maack Johan R. , Wubs Martijn
Published: June 2020

We predict that localized surface plasmons (LSP) in semiconductor particles exhibit spatial nonlocal response effects as the geometry enters the nanometer scale. To investigate these nonlocal effects, we first apply the hydrodynamic model (HDM) to nanospheres of two different semiconductor materials: intrinsic InSb and n-doped GaAs. Our results show that the semiconductors indeed display nonlocal effects, and that these effects are even more pronounced than in metals, and more tunable as well. We also present a two-fluid hydrodynamic model for semiconductors containing electrons and holes (from thermal or external excitation) or light and heavy holes (in p-doped materials). The two-fluid model predicts the existence of two longitudinal modes, an acoustic and an optical, whereas only an optical mode is present in the HDM. By extending nonlocal Mie theory to two plasmas, we simulate the optical properties of two-fluid nanospheres and predict that the acoustic mode gives rise to peaks in the extinction spectra that are absent in the HDM. And from a numerical study, we predict that by considering dimers rather than monomers of nanowires, the extinction cross section and field enhancement of the acoustic localized surface plasmon resonances can increase substantially. In this conference proceedings, we present calculations of the two-fluid GNOR model, which show that acoustic surface plasmon modes are surprisingly robust against size-dependent broadening.
Gyroscopic effect in intermolecular collision with the C60 fullerene molecule
Authors: Bubenchikov A M , Bubenchikov M A , Ovchinnikov V A
Published: June 2020

The work is devoted to the study of the gyroscopic phenomena of a rotating C60 fullerene molecule on interaction with a moving particle. To determine the precession characteristics of the C60 fullerene molecule, the pairwise interaction model of nonpolar Lennard-Jones molecules was used. The rotational motion of fullerene was described by the dynamic Euler equations. The influence of the angular velocity and direction of rotation of the fullerene molecule on the deviation from the initial position is investigated.
A study of the chirality-related properties of octagonal and dodecagonal carbon nanotubes
Authors: Krishna Maalini
Published: June 2020

The use of carbon nanotubes has grown rapidly over the past decades. The potential of these nanotubes is high and extremely useful in daily life, especially in computer systems and circuits, due to the flexibility of the properties of the nanotubes that can be controlled during their production process. Computer systems rely on the fast conductivity to function. Materials such as graphene, used in carbon nanotubes have proved to be highly conductive materials, more so than the silicon wires used today. This paper explores the possibilities of a new type of carbon nanotube, which has an octagonal lattice instead of a hexagonal lattice of a traditional carbon nanotube, and finds expressions for its basic properties. These properties are compared with that of a traditional hexagonal lattice. This could provide useful applications in the future of physics and computer systems. With the growing need for higher computational power or the design of new materials, a study in such octagonal-shaped carbon nanotubes could prove useful. Dodecagonal-shaped carbon nanotubes are also proposed in this paper with chiral properties equivalent to that of hexagonal carbon nanotubes, which could be explored further as well.
GaN nanowires/ p-Si interface passivation by hydrogen plasma treatment
Authors: Yu Shugurov K , Mozharov A M , Bolshakov A D , Fedorov V V , Uvarov A V , Kudryashov D A , Yu Mikhailovskii V , Cirlin G E , Mukhin I S
Published: June 2020

The effect of hydrogen plasma treatment on the electrical and optical properties of GaN NWs/Si based vertical hetero structures synthesized by the method of plasma molecular beam epitaxy is studied. The effect of treatment has been carefully studied by variation of the passivation duration. Measurements of the electron beam-induced current (EBIC) technique showed the absence of potential barriers between the active parts of the diode and the contacts, which indicates the ohmic behavior of the latter. The current - voltage characteristics show that hydrogen can efficiently passivate recombination centers at the GaN NWs/Si heterointerface. It is established that the optimal passivation duration, providing improved electrical properties, is 10 minutes in the adopted passivation modes. It is shown that a longer treatment causes a deterioration in electrical properties.
Pulsed laser ablation in liquids for the production of gold nanoparticles and carbon quantum dots: from plasmonic to fluorescence and cell labelling
Authors: Doñate-Buendía C , Fernández-Alonso M , Lancis J , Mínguez-Vega G
Published: June 2020

The synthesis of high purity ligand free nanoparticles represents one of the requirements for nanotechnology application in highly relevant fields as nanomedicine and theranostics. Laser synthesis and processing of colloids permits the synthesis of ligand free nanoparticles with reduced impurities from bulk targets and colloidal dispersions. In the present contribution a novel approach for enhanced production of ligand free gold nanoparticles by femtosecond ablation of a bulk target is studied together with a more efficient synthesis of fluorescent carbon quantum dots from a colloidal suspension of carbon microparticles in polyethylene glycol.
Characterisation of pH dependent peptide nanostructures using small angle scattering
Authors: Vadakkedath P G , McGillivray D J
Published: June 2020

The development of adaptive nanomaterials that are responsive to changes in their surrounding environment would enable such materials to be used in wide range of applications such as drug delivery vehicles or biosensors. Reversible boronic ester chemistry, which is used in this work, has several advantages as a building block for making adaptive nanomaterials including the ease of preparation, high sensitivity to external stimuli such as pH, and relative stability especially when compared to other non-covalent reversible systems. Herein, by using small boronic acids as anchor and peptides as connectors, we report progress in the initial development of novel, peptidyl-based pH dependent adaptive nanomaterials using reversible boronic ester chemistry and its characterisation using small angle X-ray scattering.
Comparison of Signal Processing Algorithms for High-Resolution FMCW Terahertz Thickness Measurements
Authors: Schreiner N , Keil A , Sauer-Greff W , Urbansky R , Friederich F
Published: June 2020

When using the frequency-modulated continuous-wave (FMCW) approach for layer thickness determination of dielectrics, such as multilayer pipe walls, the resolution is usually limited by the bandwidth. For thinner layers, we compare the measurement signal with potential model signal outputs. Since our approach results in high computation efforts by using brute force optimization, spectral estimation may present an alternative for high resolution distance and hence thickness determination. In this contribution, we compare results of a parametric algorithm (modified covariance method) and a subspace method (multiple signal classification, MUSIC) with the results of our approach.
Using soy protein in the three-component phantom for breast cancer mimicking
Authors: Cassar Q. , Lykina A.A. , Lepeshkin A.I. , Baranenko D.A. , Kravtsenyuk O.V. , Mounaux P. , Guillet J.-P. , Smolyanskaya O.A.
Published: June 2020

Creation of the biological tissue phantoms especially breast tissue cancer in the terahertz frequency range is an actual problem of medical physics. This paper suggests using soy protein as one of the main component of breast tissue phantom instead of gelatin, as it’s water-and fat-holding substance, “quasi-bioidentical” to animal proteins and their chemical characteristics are stable in time. Implemented phantoms were analyzed experimentally by using terahertz pulsed spectroscopy, obtained results were compared with spectra of adipose, fibrous and cancer tissue (human female breast tissue).
Multi absorber made from rice husk and CaCl2-KMnO4 in absorbing water vapor and ethylene
Authors: Rahmah A , Warsiki E , Iskandar A
Published: June 2020

The excessive ethylene gas and water vapor are not desired particularly in the fruit post-harvest handling, since the substances can shorten the shelf life and accelerate the rooting of the fruits thus its presence in the fruit handing is needed to be control. In this research, a multi absorber has been manufactured from calcium chloride (CaCl2) and potassium permanganate (KMnO4) with active rice husk as a matrix. The purpose of this study is to observe the capability of multi absorber of CaCl2 and KMnO4 trapped into rice hush matrix in absorbing water vapor and ethylene. In this study, CaCl2 and KMnO4 solutions with mol ratio of 1 : 2; 2 : 1; 1 : 3 and control (with CaCl2(1 mol) or KMnO4(1 mol)) were impregnated into the matrix. The experiment resulted that the ratio of CaCl2 (1 mol): KMnO4 (3mol) was able to absorb KMnO4 as much as 0.89 mg ethylene per 3 g absorber for 1 h of exposure. It also worked for absorbing water vapor as much as 1.03 g/g absorber for 7 days of storage at RH97%. Based on this experiment, the multi absorber resulted from this research is potential to be applied as ethylene and water vapor absorber.
Acidic and enzymatic hydrolysis of glucomannan agroindustrial waste
Authors: Nasrullah M , Purwoko  , Sunarti T C
Published: June 2020

Processing iles-iles tubers (Amorphophallus onchophyllus) into glucomannan flour leaves waste in the form of solid powder which is a by-product of the glucomannan separation process. The waste contains starch, fiber, and the remaining glucomannan which can still be used as simple sugar through hydrolysis. The purpose of this study is to examine the hydrolysis process of glucomannan agro-industrial waste using acidic and enzymatic methods as a comparison and to determine its effect on the products and by-products formed. Acid hydrolysis using conventional heating (autoclaves) and microwaves with dilute acids, HCl and H2SO4at concentrations of 0.5 M and 1 M. Enzymatic hydrolysis using a consortium of α-amylase (1.75 and 3.5 U/g), amyloglucosidase (0.3 and 0.6 U/g), and cellulase (1 and 2 U/g). The results showed the potential of waste with the main components consisting of starch (47.26 ± 0.29%), fiber (15.79 ± 0.62%), residual glucomannan (12.64 ± 0.26%). Acid hydrolysis using HCl (0.40-0.56 g sugar/g dry matter) results slightly higher than H2SO4(0.43-0.53 g sugar/g dry matter). Autoclaves hydrolysis produces sugars with a high DE (76.08-100.18), but with a lower yield (35.90-40.50 %), while the microwave hydrolysis produces sugars with a DP (1.62-2.22) and a higher yield. The higher the concentration of acid, the reducing sugar value, DE, and the higher HMF, but lower DP. In enzymatic hydrolysis, an increase in enzyme dose gives results that are not significantly different. The best treatment is obtained from enzymatic hydrolysis with normal doses because it has a reducing sugar (0.43 g reducing sugar/g dry matter) and total sugar (0.66 g sugar/g dry matter) high and a low HMF (0.19 mg HMF/g dry matter).
Production of biodegradable film based on sweet potato starch with hydroxypropylation-crosslinking
Authors: Saman W R , Yuliasih I , Sugiarto
Published: June 2020

Plastics that are used as packaging have many advantages including flexible, transparent and not easily torn. The disadvantages of the material used in the manufacture of conventional plastics are non-biodegradable in the environment. One of the ingredients for making biodegradable films is white sweet potato, this is because chemically, sweet potato has amylose content of 35.99%. Native biodegradable starch films have hydrophilic properties, to overcome these weaknesses, it is necessary to repair or modify starch. Biodegradable hydroxypropylationcrosslinking films have a lower solubility value than unmodified films. High film solubility values indicate a decrease in the quality of the film to be used as food packaging material because the film easily dissolves in water and increases the possibility of damage to packaged products especially for products easily affected by water content. The tensile strength and percent elongation values of the entire modified starch films have a higher value than those of natural sweet potato starch films. Water vapor transmission rate (WVTR) is lower than that of natural sweet potato starch films. Transparency value has decreased to 13.89-14.10 (%abs/mm) which indicates that the film is in good clarity.
Production and characterization of PVA/alginate composite filament with cellulose from oil palm empty fruit bunches
Authors: Sihite R E M , Fahma F , Sailah I , Yunus M , Kusumaatmaja A , Mukti R R , Kadja G T M
Published: June 2020

Cellulose is a renewable natural polymer that has abundant availability in the Earth and found in oil palm empty fruit bunches (OPEFBs). OPEFBs is one of the biomass produced from the crude palm oil industry. Cellulose fibers were isolated by alkaline treatment and bleaching. Cellulose from OPEFBs can be utilized as filament material by mixing it with polyvinyl alcohol (PVA) and alginate. In this work, OPEFBs cellulose/PVA/alginate composite filaments were produced by the wet spinning method with 9 wt% CaCl2 as a coagulant solvent and characterized. The effect of composite formulation on mechanical, morphological, crystallinity, and thermal properties of filaments was observed. The observed result shows that the increasing cellulose concentration had excellent thermal stability, higher crystallinity, with the morphology of the surface became rougher than 0% cellulose filament. The addition of cellulose had a significant effect on the mechanical properties of filaments, increasing the tensile strength and decreasing the elongation of filaments.
Encapsulation of ginger oleoresin with a combination of maltodextrin and skim milk powder as wall material
Authors: Setyaningsih D , Kurniawan D , Muna N
Published: June 2020

Ginger oleoresin has active ingredients that are very sensitive to temperature, light, process and storage conditions. Its thick and sticky physical properties also make it difficult in application and handling. Encapsulation is the solution to overcome this problem. The purpose of this study is to select the concentration of maltodextrin and skim milk powder as wall material, the ratio of emulsifier to oleoresin, and to determine the best formulation affected by the ratio of wall material to oleoresin on the characteristics of encapsulated ginger oleoresin. The best formula for encapsulation is from the ratio of maltodextrin and skim milk powder 0.5 : 1.0 as wall material and oleoresin concentration is 15% of the wall material. This treatment resulted in 92.31% encapsulation efficiency. Increase of maltodextrin concentration leads to increase emulsion viscosity, decrease emulsion stability and increase solubility in water, meanwhile increase of skim milk powder and oleoresin concentration leads to increase the encapsulation efficiency. GC-MS analysis of essential oils in oleoresin and in microcapsules show that there is no different composition of active compounds. The application of ginger oleoresin microcapsules on instant ginger tested by hedonic test found that the highest score consisted of 0.3 g of microcapsules in formula.
Effect of nitrogen nanobubble preservation on the quality, microbial population, and storage life of fresh yellowfin tuna (Thunnus albacares)
Authors: Saputra R N , Rahmawati A I , Absirin M F , Junaedi H , Cahyadi D , Noviyanto A , Nugroho D W , Suryandaru  , Ikono R , Rochman N T
Published: June 2020

The objectives of this study were to evaluate the effect of nitrogen nanobubble for storing fresh yellowfin tuna (Thunnus albacares). Yellowfin tuna were stored for 10 days in two types of treatment: nitrogen nanobubble (NNB) and conventional packaging process (CPC). Two methods including qualitative (organoleptic) and quantitative (histamine and mercury content, and total plate count of bacteria) were analyzed to determine the treatments effect on post-harvest quality, microbial population, and shelf-life of the fish. Results show that nitrogen nanobubble is proven to maintain dissolved oxygen levels remain in low conditions ( < 1 mg/L) during treatment. Although the organoleptic properties for both treatments do not show any significant differences, the lowest histamine and mercury contents are found in treatment NNB at 11.8 mg/kg and 0.14 mg/kg, respectively. The microbes in treatment NNB is achieved levels deemed safe (based on national standards) at 1.8 × 104colonies/g,E. colicontent <3 MPN/g, and the presence ofSalmonellasp. are not detected. Our results suggest that treatment NNB is preferable for preservation process of fresh yellowfin tuna and might improve to extend the shelf-life.
Physical properties and protein content evaluation of fermented floating feed containing black soldier fly maggots as a potential alternative for fish feed
Authors: Maulana M F , Mauladani S , Rahmawati A I , Ma’hadah R , Kamila M , Syarif A , Komarudin  , Saputra H K H , Junaedi H , Cahyadi D , Ahidin U , Sriherwanto C , Suja’i I , Nadaviana A , Nugroho D W , Ikono R , Rochman N T
Published: June 2020

The objective of this study is to examine physical properties of experimentally formulated diets containing black soldier fly (Hermetia illucens) maggots as a protein source replacement. It is fermented by Rhizopus sp. to increase buoyancy in water. Maggots at 60% of total ingredients are incorporated into six prepared diets which received two types of agriculture wastes at three different ratios (3:7, 1:4, 3:17) and tapioca at two different levels (10% and 12%). The protein content is analyzed using proximate method and the physical properties (measured in stability and buoyancy) are evaluated by testing floatation ability under aeration and non-aeration conditions. The six formulated diets have protein content up to 28% (w/w), while the buoyancy and stability characteristics range from 70-93% and 80-95%, respectively. The diet with 3:7 ratio of agriculture wastes and 10% tapioca gives the best results in stability and protein content at 95% and 28.04% (w/w), respectively. Due to its high value properties, the maggot-based floating feed could be used as an alternative nutrition source for fish feed.
Bio-ethanol production from sweet sorghum bagasse by engineered simultaneous saccharification and fermentation technology using Trichoderma reesei and Saccharomyces cerevisiae
Authors: Syamsu K , Haditjaroko L , Syadiah E A
Published: June 2020

This study was performed on sweet sorghum bagasse as a medium for bio-ethanol production. The aim of this study is to design a method to produce bio-ethanol by Simultaneous Saccharification and Fermentation (SSF) technology using Trichoderma reesei and Saccharomyces cerevisiae at a higher yield. Pre-treatment stage was conducted by using sodium hydroxide (2%) hydrothermal and hydrogen peroxide (7.44%) for 6 h, at temperature of 40°C and agitation of 120 rpm. The experimental setup consisted of two treatments, namely Conventional SSF (CSSF) and Engineered SSF (ESSF). The results show that Conventional SSF using full agitation and aeration can produce bio-ethanol at 6.6 g L−1, with the yield (Y p/s) of 0.17 g bio-ethanol/g substrate, and productivity of 0.09 g L-1 h-1. A better result is obtained using Engineered SSF which produces bio-ethanol at 10.73 g L-1, with the yield (Y p/s) of 0.33 g bio-ethanol/g substrate and productivity of 0.15 g L-1 h-1.
A synthesis of AgNP-rGO-PANI nanocomposite and its use in fabrication of chipless RFID sensor: current research progress
Authors: Junervin  , Djatna T , Fahma F
Published: June 2020

Chipless RFID (Radio Frequency Identification) tag has attracted significant attention due to the low manufacturing cost. By eliminating the use of integrated circuit (IC), chipless RFID tag can offer competitive price in order to completely replace barcode systems. Besides, integration of physical parameter sensors with chipless RFID will open up a new domain for controlling and monitoring perishable items. It can also be fully printable by using inkjet-printed technology. The inkjet-printed technique is one of the most promising technological solutions for the realization of chipless RFID with low-cost advantage. Various types of conductive inks with different fillers such as metal nanoparticles, carbon nanotubes (CNT), and polymer have been developed for printed electronics. It needs deep investigation and study in designing low-cost but robust by using conductive ink on a low-cost substrate. The aim of this review is to claim research gap related to how AgNP-rGO-PANI (Silver Nanoparticle - Reduced Graphene Oxide - Polyaniline) nanocomposite has both scientific and economic advantages. The inkjet-printed method using conductive inks with nanocomposite fillers synthesized from semiconductor materials such as graphene, silver nanoparticles, and polyaniline on a thin sheet of low-cost substrate. This review provides an overview of synthesis methods of AgNP-rGO-PANI nanocomposite, structure and design of chipless RFID sensor, and chipless RFID sensor fabrication methods.
Pollutants removal in electrocoagulation of detergent wastewater
Authors: Suprihatin  , Aselfa F S
Published: June 2020

Detergent wastewater contains pollutants, mainly nutrients (phosphor), that have harmful impact on the environment (eutrophication). Electrocoagulation is an alternative for treatment of detergent waste, so that the levels of pollutants contained in the wastewater can be reduced and the treated wastewater can be discharged to the environment safely. The purpose of this study is to identify the effect of voltage and contact time on the electrocoagulation process using aluminum electrodes in removing nutrients and other pollutants of detergent wastewater. The electrocoagulation process was carried out using aluminum electrodes. The detergent wastewater before and after treatments were characterized, and the effect of voltage and process duration on removal of pollutant levels in detergent waste was analyzed to determine the best operating condition of the treatment. The voltage of 15, 18, 21 and 24 volts were evaluated at various durations of electrocoagulation process. The results showed that the electrocoagulation process was able to reduce ammonium and phosphate and also color parameter, turbidity, TSS, MBAS and COD. The pH parameter values increased during the electrocoagulation process. The best combination of treatments was identified at 21 volts for 120 minutes, with an energy consumption of 0.084 kWh/liter and an estimated cost of only Rp 377/liter.
The potential usage of recycled waste water in small scale tapioca industry in Bogor
Authors: Adnan A A , Ismayana A , Sailah I , Shobi I , Indrasti N S
Published: June 2020

Small scale tapioca industry in Bogor uses simple technology and equipment with a production capacity around 5 tons per day. The tapioca industry uses large amount of water to process the raw materials and to produce a large amount of liquid waste. The tapioca production consists of various processes, such as washing, extraction and settling process which produce a lot of liquid waste. This liquid waste contributes to the environmental pollution because it contains a lot of organic materials. The wastewater of tapioca industry generally has a high BOD, COD and TSS materials. The objective of this research is to calculate the potential waste water recycling in small scale tapioca industries in Bogor. Recycling this waste water can be done in two ways such as onsite recovery (reuse of waste water in the same process) and reuse (waste water uses for other process). Small scale tapioca industry in Bogor has an average production of 2.5 tons per day and produces liquid waste of 5070 litres/ton cassava. The identified potential usage of recycling waste water is recycling waste water for other process such as washing, milling, settling process and the conversion of waste into valuable product such as methane as a fuel. With this waste water recycling process, the tapioca industry will have a benefit in form of cost saving, and environmental benefit.
Combination of analytical hierarchy processes with fuzzy c- means in selecting quality broiler chicken
Authors: Gustian D , Hasman D , Supardi D , Nurjanah S , Darmawan A , Suciati I , Hundayani R D
Published: June 2020

One of the key points in broiler chicken farming is in the initial process of selecting chicken seeds or known as DOC. The problem that emerged in the field is there are so many options of broiler breeds available from Breeding Farm, making it difficult for farmers and companies to choose the good quality broiler chickens. This research uses Analytical Hierarchy Combination Process for knowing which sequence is influenced on choosing process, in order to produce the good quality disease-free chicken seeds with standard variables; the highest weight is 0.207, followed by normal body 0.174 then weight according to the standard with a value of 0.172. Fuzzy C-Means is used for cluster processes in monitoring the quality levels of each chicken breeding process with results divided into 3 clusters. They are cluster 1 with as many as 410 breeders (96.70%), cluster 2 with 12 breeders (2.83%) and clusters 3 with 2 farmers (0.47%). With this method, companies can reduce losses caused by mistakes from these three parts and company profits increases.
Sustainable flexible flow shop scheduling optimization in flexible packaging industry using genetic algorithm
Authors: Marimin  , Farhan M N
Published: June 2020

Flexible flow shop (FFS) scheduling optimization process has a high level of complexity and categorized as an NP-hard problem. X Co is a flexible packaging manufacturer that scheduled FFS manually with a low sustainability level. The objective of this research is to optimize FFS scheduling in X Co using Genetic Algorithm (GA) method to increase the sustainability level and measure its performance. The sustainability parameters contain three main aspects of sustainability. In this optimization process, makespan minimization used as the objective function, and elitism is applied in the GA method to make sure the makespan value is getting smaller in each generation. The result shows an increment of sustainability level in all parameters. Makespan value reduction by 135 hours, zero lateness, idle time reduction by 1755 (hour*machine), machine utility improvement by 5.58%, electricity consumption reduction by 23664 kWh which converted into a reduction of 16731 KgCO2e greenhouse gas, and also increase employee productivity as much as 0.066 jobs/shift. This research shows an optimal result with a higher level of sustainability in the implementation of optimization on FFS scheduling at X Co.
New product development in coconut-based agro-industry: current research progress and challenges
Authors: Wardah S , Djatna T , Marimin  , Yani M
Published: June 2020

The new product development of coconut agro-industry is very urgent because of the low innovation in launching new products. New products that are more effective and adaptive are needed to achieve higher market growth and acceptance of end-users to obtain competitive coconut agro-industry in the future. Based on this, this study aims to claim the current development of our research in new coconut-based product development and provide an initial approach to construct new products as a case study. The results show that the development of new products is divided into eight groups and the development of coconut derivatives in agro-industry is around eight percent. The low development of coconut derivatives in agro-industry results in a research challenge framework. Methods for developing new products in the coconut agroindustry include consumer preference to identify product opportunities including data mining techniques, investment feasibility study, and spatial data mining by taking analysis in multi-criteria decisions for compatibility of potential raw materials with products. The results of case studies show that alternative sequences of derivative products that are potentially developed in agro-industries are soap (H), itching medication (O), fungicide (D), sterilizing agent (L).