bluuebunny/crossref_metadata_2025 huggingface dataset:
Defining language dependent post-editing guidelines for specific content
Authors: Mah Seung-Hye
Published: June 2020

The rapid development of neural machine translation systems and the emergence of the e-book have broadened the
scope of text types that can be translated by machines. At the early stage of the machine’s infiltration into the translation
field, target texts were mainly technical texts such as patents, instruction manuals, etc. Literary texts have been considered as
the last bastion of human translation because the machine translation (MT) has produced word-for-word translation, unsuitable for
literary texts with distinct stylistic elements. However, it turns out that the field of literary translation was not immune to
the rise of MT. Style is one of the critical elements in literary texts, but it has been dismissed in the existing MT post-editing
guidelines. Therefore, this research attempts to provide methodological ideas about how to come up with a machine translation
post-editing guideline (MTPE) for style improvement especially for language pairs with divergent syntax and semantics like English
and Korean. First, the linguistic and cultural differences in writing styles are sorted out based on previous research. Second,
the different ways in which human translators address writing style are investigated. Third, the strategies that human translators
employ in their translations are applied to machine translation post-editing to demonstrate how the strategies can be incorporated
into English-Korean MTPE to improve style. This preliminary research would lay the groundwork for refining post-editing style
guidelines and for accumulating manually post-edited data for style improvement, which would be conducive to building and
customizing automatic post-editing systems.
The many Spanishes of an Andean-Amazonian crossroads
Authors: Emlen Nicholas Q.
Published: June 2020

In the Southern Peruvian Amazon, agricultural migrants from the Andes have brought Quechua and Andean Spanish into the traditional Amazonian territory of Matsigenka speakers. This chapter offers an ethnographic and socio-historical view of Andean Spanish on one corner of this Amazonian frontier. The social life of Spanish in this region is illustrated through the lives of three community-mates, whose speech exhibits diverse contact effects reflecting the diversity of their frontier experiences. This case shows how, unlike Spanish in the Andes, which developed in the highlands without a major migratory influx from other regions, Amazonian varieties of Spanish emerged as more or less heterogeneous populations from other places migrated and came together with the speakers of dozens of local indigenous languages.
Stabilization of Short Wavelength Resistive Ballooning Modes by Ion-to-Electron Temperature and Gradient Ratios in Tokamak Edge Plasmas*
Authors: Xu Jian-Qiang , Peng Xiao-Dong , Qu Hong-Peng , Hao Guang-Zhou
Published: June 2020

We numerically investigate the effects of ion-to-electron temperature ratio T
i/T
e and temperature gradient ratio η
i/η
e on resistive ballooning modes (RBMs) under tokamak edge plasma conditions. The results show that the growth rates of the RBMs exhibit the characteristic of a quite broad poloidal wavenumber spectrum in the cold ion limit. The growth rate spectrum becomes narrower and the peak of the spectrum shifts from the short to long wavelength side with increasing T
i/T
e and η
i/η
e. The electron temperature gradient has a very weak effect on the stability of RBMs. However, the ion-to-electron temperature ratio and the temperature gradient ratio have strong stabilizing effects on short-wavelength RBMs, while they have relatively weak effects on long-wavelength RBMs.
Surface Oxygen Adsorption and Electric Property of Hydrogen-Terminated Single Crystal Diamonds by UV/ozone Treatment*
Authors: Yang Ming-Chao , Wan Lin-Feng , Wang Jing-Cheng , Ma Zi-Cheng , Wang Peng , Gao Nan , Li Hong-Dong
Published: June 2020

Surface terminations of diamond play an important role in determining the electric properties of diamond-based electronic devices. We report an ultraviolet/ozone (UV/ozone) treatment process on hydrogen-terminated single crystal diamond (H-diamond) to modulate the carrier behavior related to varying oxygen adsorption on surfaces. By UV/ozone treatments, the induced oxygen radicals are chemically adsorbed on the H-terminated diamond and replace the original adsorbed H, which is analyzed by x-ray photoelectron spectroscopy. The concentration of oxygen adsorbed on surface increases from ∼3% to ∼8% with increasing the ozone treatment time from 20 s to 600 s. It is further confirmed by examining the wettability properties of the varying diamond surfaces, where the hydrophobic for H-termination transfers to hydrophilic for partly O-termination. Hall effect measurements show that the resistance (hole mobility) of the UV/ozone-treated H-diamond continuously increases (decrease) by two orders of magnitude with increasing UV/ozone treatment time from 20 s to 600 s. The results reveal that UV/ozone treatment becomes an efficient method to modulate the surface electrical properties of H-diamonds for further investigating the oxygenation effect on two-dimensional hole gas based diamond devices applied in some extreme environments.
Fermionic Analogue of High Temperature Hawking Radiation in Black Phosphorus*
Authors: Liu Hang , Sun Jia-Tao , Song Chenchen , Huang Huaqing , Liu Feng , Meng Sheng
Published: June 2020

Time-periodic laser driving can create nonequilibrium states not accessible in equilibrium, opening new regimes in materials engineering and topological phase transitions. We report that black phosphorus (BP) exhibits spatially nonuniform topological Floquet–Dirac states under laser illumination, mimicking the “gravity” felt by fermionic quasiparticles in the same way as that for a Schwarzschild black hole (SBH). Quantum tunneling of electrons from a type-II Dirac cone (inside BH) to a type-I Dirac cone (outside BH) emits an SBH-like Planck radiation spectrum. The Hawking temperature TH obtained for a fermionic analog of BH in the bilayer BP is approximately 3 K, which is several orders of magnitude higher than that in previous works. Our work sheds light on increasing TH from the perspective of engineering 2D materials by time-periodic light illumination. The predicted SBH-like Hawking radiation, accessible in BP thin films, provides clues to probe analogous astrophysical phenomena in solids.
Terahertz Perfect Absorber Based on Asymmetric Open-Loop Cross-Dipole Structure
Authors: Yan Meng-Yao , Xu Bi-Jun , Sun Zhi-Chao , Wu Zhen-Dong , Wu Bai-Rui
Published: June 2020

Equipped with multiple and unique features, a terahertz absorber exhibits great potential for use in the development of communication, military, and other fields where achieving perfect broadband absorption has always been a challenge. We present a metamaterial terahertz (THz) absorber comprising a cross-dipole patch, four symmetric square patches and an asymmetric open-loop patch with a good perfect absorption rate for TE and TM polarizations. The average absorption of more than 96% occurs in the frequency range from 2.4 THz to 3.8 THz, in which the absorptance peak can reach 99.9%, as indicated by simulated results. Our design has broad potential applications in THz couplers, as well as in fields like biology and security.
Experimental realization of dynamic fluence field optimization for proton computed tomography
Authors: Dickmann J , Sarosiek C , Rykalin V , Pankuch M , Rit S , Detrich N , Coutrakon G , Johnson R P , Schulte R W , Parodi K , Landry G , Dedes G
Published: June 2020

Proton computed tomography (pCT) has high accuracy and dose efficiency in producing spatial maps of the relative stopping power (RSP) required for treatment planning in proton therapy. With fluence-modulated pCT (FMpCT), prescribed noise distributions can be achieved, which allows to decrease imaging dose by employing object-specific dynamically modulated fluence during the acquisition.

For FMpCT acquisitions we divide the image into region-of-interest (ROI) and non-ROI volumes. In proton therapy, the ROI volume would encompass all treatment beams. An optimization algorithm then calculates dynamically modulated fluence that achieves low prescribed noise inside the ROI and high prescribed noise elsewhere. It also produces a planned noise distribution, which is the expected noise map for that fluence, as calculated with a Monte Carlo simulation. The optimized fluence can be achieved by acquiring pCT images with grids of intensity modulated pencil beams. In this work, we interfaced the control system of a clinical proton beam line to deliver the optimized fluence. Using three phantoms we acquired images with uniform fluence, with a constant noise prescription, and with an FMpCT task. Image noise distributions as well as fluence maps were compared to the corresponding planned distributions as well as to the prescription. Furthermore, we propose a correction method that removes image artifacts stemming from the acquisition with pencil beams having a spatially varying energy distribution that is not seen in clinical operation. RSP accuracy of FMpCT scans was compared to uniform scans and was found to be comparable to standard pCT scans.

While we identified technical improvements for future experimental acquisitions, in particular related to an unexpected pencil beam size reduction and a misalignment of the fluence pattern, agreement with the planned noise was satisfactory and we conclude that FMpCT optimized for specific image noise prescriptions is experimentally feasible.
On superintegrable systems with a position-dependent mass in polar-like coordinates*
Authors: Zhang Hai
Published: June 2020

For a superintegrable system defined in plane polar-like coordinates introduced by Szumiński et al. and studied by Fordy, we show that the system with a position-dependent mass is separable in three distinct coordinate systems. The corresponding separation equations and additional integrals of motion are derived explicitly. The closure algebra of integrals is deduced. We also make a generalization of this system by employing the classical Jacobi method. Lastly a sufficient condition which ensures flatness of the underlying space is derived via explicit calculation.
Effects of postselected von Neumann measurement on the properties of single-mode radiation fields*
Authors: Turek Yusuf
Published: June 2020

Postselected von Neumann measurement characterized by postselection and weak value has been found to possess potential applications in quantum metrology and solved plenty of fundamental problems in quantum theory. As an application of this new measurement technique in quantum optics and quantum information processing, its effects on the features of single-mode radiation fields such as coherent state, squeezed vacuum state and Schrödinger cat sate are investigated by considering full-order effects of unitary evolution. The results show that the conditional probabilities of finding photons, second-order correlation functions, Qm
-factors and squeezing effects of those states after the postselected measurement is significantly changed are comparable with the corresponding initial pointer states.
Anisotropy of Ca0.73La0.27(Fe0.96Co0.04)As2 studied by torque magnetometry*
Authors: Huang Ya-Lei , Yang Run , Li Pei-Gang , Xiao Hong
Published: June 2020

Torque measurements were performed on single crystal samples of Ca0.73La0.27(Fe0.96Co0.04)As2 in both the normal and superconducting states. Contributions to the torque signal from the paramagnetism and the vortex lattice were identified. The superconducting anisotropy parameter γ was determined from the reversible part of the vortex contribution based on Kogan’s model. It is found that γ ≃ 7.5 at t = T/T
c = 0.85, which is smaller than the result of CaFe0.88Co0.12AsF γ ≃ 15 at t = 0.83, but larger than the result of 11 and 122 families, where γ stays in the range of 2–3. The moderate anisotropy of this 112 iron-based superconductor fills the gap between 11, 122 families and 1111 families. In addition, we found that the γ shows a temperature dependent behavior, i.e., decreasing with increasing temperature. The fact that γ is not a constant point towards a multiband scenario in this compound.
Bifurcation analysis and exact traveling wave solutions for (2+1)-dimensional generalized modified dispersive water wave equation*
Authors: Song Ming , Wang Beidan , Cao Jun
Published: June 2020

We investigate (2+1)-dimensional generalized modified dispersive water wave (GMDWW) equation by utilizing the bifurcation theory of dynamical systems. We give the phase portraits and bifurcation analysis of the plane system corresponding to the GMDWW equation. By using the special orbits in the phase portraits, we analyze the existence of the traveling wave solutions. When some parameter takes special values, we obtain abundant exact kink wave solutions, singular wave solutions, periodic wave solutions, periodic singular wave solutions, and solitary wave solutions for the GMDWW equation.
Measurement of eye lens doses estimation in interventional radiology
Authors: Arifin Z , Setiawati E , Putri A A , Hidayanto E , Heriyani  , Reskianto A D , Rusmanto
Published: June 2020

International Commission of Radiological Protection (ICRP) Publication number 118 at 2012 recommends decreasing the Dose Limit Value of eye lens for workers from 150 mSv to 20 mSv in 1 year, and to not exceed 50 mSv in a certain year. This experiments is aimed to evaluate the value of eye lens radiation dose based on the effect of angles on the monitor in interventional radiology by using a head phantom as a simulation of the workers’ position with a height of 150 cm, 160 cm and installed thermoluminescent dosimeter (TLD) chips Hp (10) at 66 - 67 kV and 385 - 395 mA. The radiation lens dose value during 1 minute fluoroscopy irradiation results a mean of radiation dose value that ranges between 0,54 – 0,79 mSv and 0.52 - 0.70 mSv, during 4 minutes fluoroscopy irradiation ranges between 0,48 – 0,72 mSv and 0.55 - 0.75 mSv, and during 10 seconds cinefluorography ranges between 0.52 – 0,75 mSv and 0.48 - 0.66 mSv. The relationship between the linearity of fluoroscopy irradiation time and dose area product (DAP) obtained an equation of y = 0.0139x-0.0535 with a correlation coefficient R2 = 0.9982. The relationship between the linearity of fluoroscopy irradiation time and Kinetic Energy Released per Mass unit (KERMA) obtained an equation of y = 0.0957x-0.0495 with a correlation coefficient R2 = 0.9988.
Study of low head turbine propellers axial flow for use of micro-hydropower plant (MHP) in Aceh, Indonesia
Authors: Pribadyo  , Hadiyanto H , Jamari J
Published: June 2020

Low head hydropower has the potential to produce green energy with a minimum on the environment and is one of the best choices for decentralized power plants. Aceh is one of many regions in Indonesia with hilly topography and many river streams. Of the 66 rivers in Aceh that have potential energy sources that can be developed 98.5 percent are low head. Generally, the technique for overcoming altitude problems in low river flows is the use of low head turbines. An important aspect of head power generation techniques is the selection of turbines. The study aimed to study low head propeller turbines for the use of micro hydropower plants. By calculating the main dimensions and main components of the turbine, field experiments were carried out to determine turbine rotation and energy, as well as turbine efficiency at a flow rate of 0.06 m3/sec and a 3.5-meter head. The calculation results obtained by a specific turbine speed of 1.53, runner diameter of 0.30 meters, hub diameter of 0.06 meters, shaft diameter 0.03, runner length 1.08, triangular speed of 30 degrees with the number of blades 4 pieces. From the results of field experiments, the maximum turbine rotation speed is 1828 rpm, the turbine power is 2,530 watts with a voltage between 220 to 240 volts while the maximum efficiency is 57 percent. It can be concluded that propeller-type turbines with the low head are suitable for micro power plants, especially in remote areas.
Energy and exergy analysis economic of continuous vibrating fluidized bed drying on celery drying
Authors: Handayani S U , Atmanto I S , Putri F T , Fujiwara S
Published: June 2020

This paper present the experimental work of celery drying using continuous vibrating fluidized bed drying. Fresh celery leaves dried at 50°C, 60°C and 70°C in continuous vibrating fluidized bed dryer with a dimension of 2350 mm × 300 mm. Energy and exergy analysis was conducted to determine the performance of the system, among others, energy utilization, energy efficiency, and efficiency of the exergy so it can be known potential energy savings can be obtained. From the calculation results can be concluded that the increase in drying temperature will increase energy utilization and energy utilization ratio and decrease the efficiency of the exergy. Average energy utilization ratio at 50°C is 0.0768, at 60°C is 0.1199 and at 70°C is 0.1682. Exergy efficiencies decrease with increasing temperature. Average exergy efficiencies are 0.19, 0,16 and 0.17 for 50°, 60° and 70°C drying temperature respectively. The main factor that causes thermodynamic inefficiency is the exergy that leaves the system, exergy destruction and loss of exergy to the surrounding air.
Comparison of performance of k-nearest neighbor algorithm using smote and k-nearest neighbor algorithm without smote in diagnosis of diabetes disease in balanced data
Authors: Pertiwi A G , Bachtiar N , Kusumaningrum R , Waspada I , Wibowo A
Published: June 2020

According to the Indonesian Health Profile in 2017, diabetes is one of the causes of death for almost 70% in the world. The high mortality rate induces the need for making the effort to reduce the number of people with diabetes by conducting studies that lead to making a diagnosis so that can detect a person with diabetes accurately. This study tries to compare the performance of the K-Nearest Neighbors algorithm using Synthetic Minority Over-sampling Technique and the K-Nearest Neighbors algorithm without Synthetic Minority Over-sampling Technique in diagnosing diabetes on imbalanced datasets. The parameters tested are the k value of the K-Nearest Neighbors and Synthetic Minority Over-sampling Technique. The testing is carried out using the K-Fold Cross Validation strategy. The data used in this study were 3876 data from Pertamina Central Hospital. Based on the results of tests conducted, it shows that the value of accuracy produced in diagnosing diabetes by using Synthetic Minority Over-sampling Technique is better than the accuracy produced without using Synthetic Minority Over-sampling Technique with the highest accuracy increase of 8.25%. The highest average accuracy is obtained when the value of k = 3 in the K-Nearest Neighbors, k = 5 in the Synthetic Minority Over-sampling Technique, and fold = 10, which reaches 78.06%.
3D modeling of buried site ngempon temple, bergas, semarang regency using HVSR method
Authors: Yuliyanto G
Published: June 2020

This study aims to model the Ngempon Temple that is still buried under the surface using the microtremor method with HVSR data processing. The measurement geometry consists of 39 points forming a rectangular grid with a measurement spacing of 2 m. The duration of data collection was 10 minutes for each point and the sampling frequency was 150 Hz. The results obtained from this study indicate the location of the temple site and subsurface 3D models of the temple site which are characterized by a frequency range of 1.28-1.32 Hz and amplification of 1.275.
Antibacterial activity tests of isolate endophytic bacteria from the tea plant (Camellia sinensis) againts Staphylococcus aureus and Staphylococcus epidermidis
Authors: Sari S A , Pujiyanto S , Suprihadi A
Published: June 2020

Staphylococcus is one of the most common types of bacteria in Asia that causes local infectious diseases of the skin, nose, urethra, vagina, digestive tract, pneumonia, endocarditis, septic arthritis, and septicemia. Staphylococcus aureus and Staphylococcus epidermidis are the most common types of Staphylococcus in Asia. Tea plants contain bioactive compounds and endophytic bacteria which are widely used as antimicrobial agents. Endophytic bacteria are bacteria that exist in plant tissues, not pathogenic, and have the ability as the host plant. The purpose of this study was to determine the antibacterial activity of endophytic bacterial isolates of tea plants (Camellia sinensis) against the growth of Staphylococcus aureus and Staphylococcus epidermidis bacteria. The antibacterial activity test of endophytic bacteria of tea plants includes a series of processes such as sample selection, surface sterilization of samples, isolation of endophytic bacteria in agar medium, screening, suspension of endophytic bacteria in 0.9 % NaCl and standardized with 0.5 McFarland, making endophytic bacterial culture in nutrient broth medium, making endophytic bacterial supernatant and antibacterial activity test with paper disc diffusion method. The result is that there is an antibacterial activity from the endophytic bacterial supernatant isolates B14, B23, and A2 to the growth of Staphylococcus aureus and Staphylococcus epidermidis. The best antibacterial activity was found in endophytic bacterial B14 isolates with inhibition zones of 7.75 mm and 12.5 mm followed by B23 isolates with 7.5 mm and 8.25 mm inhibition zones and A2 isolates with large inhibition zones of 7.42 mm and 8.16 mm. Endophytic bacteria of tea plants showed antibacterial activity against the growth of Staphylococcus aureus and Staphylococcus epidermidis.
Ozonation of methylene blue and its fate study using LC-MS/MS
Authors: Adelin M A , Gunawan G , Nur M , Haris A , Widodo D S , Suyati L
Published: June 2020

In this study, ozone was used to degrade an organic compound of methylene blue dye. The methylene blue was treated with ozonation using ozone generator and the degradation was observed as dye decolorization. Various parameters of ozonation such as contact time, pH, and temperature were chosen. The maximum ozonation of methylene blue degradation was at pH and contact time of 11 and 13 min, respectively. The effect of temperature on the destruction of methylene blue with ozone was obtained the highest result at temperature 35 °C. The LC-MS/MS results showed that ozonation caused degradation of methylene blue producing a compound with molecular weight of 208 g/mol as the unstable compound of N-(4-nitrophenyl) butanamide (C10H12N2O3). Finally, it formed stable fraction compound of 1-nitrocyclohexene (C6H9NO2) with molecular weight of 127 g/mol which much safer and reduce the harmness of methylene blue in waste.
Purwoceng chemical characterization by FTIR spectrum and feasibility analysis of jelly purwoceng diversification with the addition of gelatine and carrageenan
Authors: Nughraheni A , Arifan F , Pratiwi M D , Faizah N A , Setyawan A
Published: June 2020

Purwoceng is a Medicinal plant commodity that has very beneficial content to health. Purwoceng is known as Indonesian ginseng, which has almost the same efficacy as Korean ginseng. In this research, the purwoceng chemical group was analyzed using the FTIR spectrum. Aside from analyzing the purwoceng chemical group, feasibility analysis and diversification of the purwoceng jelly were also carried out with physical analysis. Purwoceng has high economic value but its use is limited to medicine, therefore research on the formulation of purwoceng jelly as a new innovation was carried out. The process of making purwoceng jelly is to add gelatin and carrageenan to purwoceng extract according to the formula namely gelatin 26, 28, 24, 22 grams and carrageenan 7, 8 grams stirred until evenly mixed. Citric acid then added stirred till homogeneous and formed a sticky mixture. Then lift and pour into the mold. The produced jellies were then organoleptically tested, their level of preference and water content. The results show that the more carrageenan added, the more water content. Whereas organoleptic test formula II are more preferred. The results of the characterization of the FTIR spectrum indicate that purwoceng has chemical groups such as alcohol, carboxylic acid, esters.
Silicified coal characteristic and distribution at pt mitrabara adiperdana Tbk, north Kalimantan for efficient mine planning
Authors: Winarno T , Qadaryati N , Ginting R A
Published: June 2020

Silicified coal is formed by the enrichment of mineral in the coal seam. Due to the very hard form, silicified coal interferes with the effectiveness of mining causing more time for excavation. The purpose of this study was to determine the characteristics and distribution of silicified coal in PT. Mitrabara Adiperdana Tbk, which is used as a reference for selective mining. This research has conducted mapping which includes surface and subsurface data collection and laboratory tests. Surface data includes geological structure, stratigraphy, distribution patterns and observations of megascopic characteristics of silicified coal inseam 3. Subsurface data include drill point and coal seam cross-sections in Sector Y. Laboratory analysis is carried out from the outcrop coal sample and overburden of seam 3. Silicified coal inseam 3 has two types, which are type A, which is more fragile, and type B which is harder. In general, silicified coal in the research area was formed on the coal layer that has direct contact with the tuffaceous sandstones. In fault areas, silicified coals are found along the fracture zone where coal seams come in contact with tuffaceous sandstones. Thus, the recommended mining area is based on the silicified coal distribution map.
Consumer purchase patterns based on market basket analysis using apriori algorithms
Authors: Efrat A R , Gernowo R , Farikhin
Published: June 2020

Analyzing customer purchasing patterns can help minimarket expand marketing strategies by gaining insight into which items are often bought together by customers. Also, transaction data is a source of information available at the convenience store and one thing that can be used for business decision making. In this paper, we aim to use the Apriori algorithm method to obtain consumer purchasing patterns to analyze consumer purchasing patterns. This system uses a priori algorithm calculation method where the input data is consumer transaction data. Transaction data will be sorted and calculated by providing a minimum support value and a minimum confidence value. In this study, the authors conclude that the results of the analysis of information systems in determining consumer purchasing patterns can be as information to determine sales and in the application of Apriori algorithms can provide information in the form of a combination of consumer purchase patterns based on consumer transaction data with a minimum support value above 10% and the minimum confidence value is above 65%.
Designing advertisement board game and examining factors correlated with board gaming behaviors
Authors: Satrio M , Sanjaya R , Harnadi B
Published: June 2020

Advertising is a form of mass education for people to learn that something exists in a market. In this post-information era, from consumer products to consumer services, every company in various businesses such as airlines, the marketplace, even education have used various advertising media to raise public awareness of the brand. It can be concluded that to raise awareness of a product or public services, advertising is one of the essential parts as well as in the field of education. The study has a purpose to design a board game advertising a program in a university. The board game has the element of advertisement concealed, making the students able to enjoy searching for information about the university and increasing their will to learn about the university. This study results in a board game prototype “Flow Into The System” game tested towards 29 high school students and 9 college students in the age range of 19 to 23. The questionnaires from 38 respondents have been analyzed using SPSS statistical analysis. The finding of analysis proves that the game can make the respondents want to play it again and again because the game is fun to play, making their bonds stronger, and being perceived as useful.
Study on water quality physical-chemical parameters aquaculture areas in Menjangan Besar Island, Kepulauan Karimunjawa, Jepara, Indonesia
Authors: Farantika R , Putro S P , Hadi M , Triarso I
Published: June 2020

Good water quality is extremely important to support life of organisms. The purpose of this research is to know the condition of physical and chemical factors in aquatic biota in aquatic ecosystems against sea Menjangan Besar Island. The samples were taken in two sampling times, i.e. August and November 2018. Research locations i.e floating net cage of monoculture and reference areas. Sampling was done in situ and exitu (Laboratory test). Data of abiotic parameters included the composition of DO, pH, salinity, temperature, water current, organic matter content (carbon and nitrogen), phosphate, nitrate, and ammonia. The results were compared with water quality standards based on KEPMEN-LH No. 51 of 2004 for marine biotas. The result showed that the parameters in according to the quality standards KEPMEN-LH No. 51 of 2004 are temperature, pH, salinity, DO, and ammonia while those that have exceeded the quality standards are phosphate and nitrate. The increase in parameters that have exceeded the maximum quality standard derived from natural resources, aquaculture activities, and domestic waste from community activities is quite high.
Assessment of environmental status of coastal mangrove area using macrobenthic assemblages: a study case at Tapak Mangrove area, Semarang, Central Java
Authors: Putro S P , Adhy S , Safrijal H , Muhammad F
Published: June 2020

Macrobenthic structure can be used as a bioindicator in determining the level of disturbance in water ecosystem through their composition, presence or absence spatially and temporally as apart of ecological management. Tapak is a coastal area of Semarang City, Central Java, Indonesia that has potency as an ecotourism area for integrated aquaculture at mangrove area. On the other hand, industrial activity around Tapak coastal area may lead to a degradation of the ecological function of that area. This study aims to assess environmental status at Tapak Mangrove Area through the macrobenthic structure in space and time. Purposive random sampling method was applied, consisting five sampling stations with 3 replicates between March to May 2018. Sediment samples were taken by using Ekman grab and were analyzed through the stages of fixation, rinsing, sieving, preservation, sorting, identification, and enumeration. The biotic parameters observed were the macrobenthic community structure, including species composition, abundance, and diversity, evenness, and dominance indices. Physico-chemical parameters of the water and sediment were measured every month. The Early Warning System (EWS-3SWJ) software was used to assess the level of environmental disturbance at each station. The total of 15 species of macrobenthic assemblages were found. The most common species were Telescopium telescopium, Cerithidea cingulata, and Metapenaeus sp.. The diversity of macrobenthos was considered low at all sampling stations (H’ = 0,56 – 1,52), with marked variability in dominant taxa (D = 0,21 – 0,71). Further analysis using the EWS-3SWJ showed that the environmental status of the Tapak Mangrove Area is categorized as slightly disturbed areas.
Nutritive and antioxidative properties of some selected agro-industrial by-products fermented with the fungus Chrysonillia crassa as alternative feedstuffs for poultry
Authors: Yudiarti T , Isroli I , Yunianto V D
Published: June 2020

Agricultural by-products used as poultry feed in many developing countries. However, their use for poultry feed is limited due to high fiber and lack of nutritional substances (e.g., crude protein). The objective of this study was to evaluate the antioxidant activity and chemical composition of the agriculture by-products after they are fermented with fungi Chrysonillia crassa. Materials were three kinds by-product e.i rice bran, tofu, and palm kernel. Five hundred grams of three kinds of sterilized, dried byproducts placed in a plastic bag then added with 250 ml of aquades (for tofu and rice bran byproducts) and 500 ml to palm kernel byproduct. Five dishes of culture isolates of Chrysonillia crassa with two days old were put and mixed thoroughly in the sterilized by-products and incubated for two days then were dried. All treatments were three replicated. The antioxidant activity and chemical composition were in vitro analyzed. Results showed that the antioxidant activity of tofu improved that is before and after fermentation was 12330.08±0.00 and 1466.96±10.70, respectively. The fermentation also improved protein content. The increased of the crude protein for palm kernel, rice bran and tofu before and after fermentation were 11.81±0.00 to 12.22±0.05; 9.35±0.00 to 10.57±0.09; 168±0.00 to 21.48±0.27, respectively. On the contrary fungal fermentation decreased the crude fibre of palm kernel and rice bran but not for tofu. The decreasing of crude fibre before and after fermentation of palm kernel and rice bran were 31.54±0.00to 27.04±2.60 and 29.67±0.00 to 27.01±0.18, respectively. The fat content of the by-product increased only for rice bran that is 7.45±0.00 to 11.39±1.86, for tofu decreased, and palm kernel was not affected. In conclusion, it was fungal fermentation. Palm kernel, rice bran, and tofu using Chrysonillia crassa increased in fat, crude protein, and decreased crude fibre, however for antioxidant activity was variation in results.
Hybrid AlGaAs nanowires on silicon: growth and properties
Authors: Cirlin G E , Reznik R R , Akopian N
Published: June 2020

In the article, we demonstrate the growth of AlGaAs nanowires on silicon substrates. It is shown that a controlled growth of short GaAs insertions inside AlGaAs nanowires is possible. Optically, such segments shows sharp and intense quantum dot - like emission lines. Our work opens new prospects for integration of direct bandgap semiconductors and single-photon sources on silicon platform for various applications in the fields of silicon photonics and quantum information technology.
Zinc oxide Ce-doped nanoparticles microwave assisted synthesis with the use of different precursors
Authors: Shulga A , Butusov L A , Chudinova G K , Sheshko T F , Guseynov R M , Kochneva M V
Published: June 2020

The study considers the use of various precursors for microwave synthesis of cerium doped zinc oxide nanoparticles its influence on the quality of synthesis. Widely used in various methods precursors were taken for the research. Monohydric and dihydric alcohols - isoamyl alcohol, ethylene glycol, propylene glycol, dipropylene glycol, as well as aliphatic and polycyclic amines isopropylethylenediamine and urotropine was used for the synthesis of zinc oxide nanoparticles doped with 1% cerium in a mass ratio. The obtained nanoparticles were studied by fluorescence spectroscopy, X-ray diffraction analysis and scanning electron microscopy. It was found that the crystallinity of the obtained samples is 85 ± 2%, while the size of the nanoparticles varies up to 30% depending on the precursor used.
Influence of ammonia flow and sublayer material on adhesion properties of carbon nanotubes
Authors: Il’in O I , Il’ina M V , Guryanov A V , Rudyk N N , Fedotov A A
Published: June 2020

The results of experimental studies of the effect of the sublayer material and the ammonia buffer gas flow on the adhesion force of carbon nanotubes (CNTs) are presented. It is shown that the best adhesion is shown by CNT arrays grown on a chromium sublayer, which is due to the hierarchy of their structure. The influence of ammonia flow on the geometric parameters of CNT is shown. The nonlinear dependence of CNT adhesion force on ammonia flow is established. The results obtained can be used to create adhesive coatings of high strength.
Non-radiative relaxation processes in luminescence of InP/ZnS quantum dots
Authors: Savchenko S S , Vokhmintsev A S , Weinstein I A
Published: June 2020

Photoluminescence (PL) thermal quenching of InP/ZnS core/shell nanocrystals of 4.2 (QD-1) and 4.6 (QD-2) nm in diameter is investigated in the temperature range of 6.5-296 K. Observed PL spectra are found to originate from exciton and defect-related transitions. Temperature behavior of the emission bands indicates effects of inhomogeneous broadening due to distributions of quantum dots parameters in the ensembles. PL thermal quenching analysis unveils two non-radiative relaxation channels for each band in both samples. Activation energies of 130 and 119 meV in QD-1 and QD-2, correspondingly, for the exciton band can be assigned to the bright-bright splitting of the exciton fine structure.
The effect of carboxy-methyl-cellulose (CMC) concentration on suspension stability of red guava syrup (Psidium guajava L) during storage
Authors: Amar A , Suryawati A , Nurani D
Published: June 2020

The study aims to obtain the best CMC concentration and to maintain the stability of red guava syrup during storage. The experimental design used for analyzing the results of organoleptic data was Randomized Block Design (RBD) with one treatment, the concentration of CMC (A), consisting of 6 levels, 0%; 0.1%; 0.2%; 0.3%; 0.4% and 0.5%. The experimental design for data analysis results of viscosity, pH and total suspended solids were AxB in RBD factorial pattern (6x4). Factor A is a CMC concentration. Factor B is the length of storage consisting of 4 levels: 0 weeks, 2 weeks, 4 weeks, and 6 weeks. The analysis included organoleptic test, and physical analysis. The addition of CMC affected the total suspended solids, pH, viscosity, and stability of guava syrup and organoleptic test of guava syrup steeping (p=0.05). Using CMC did not have a positive effect on flavor but did affect the stability, color and taste (p=0.05). The results show that the addition of CMC of 0.3% in red guava syrup is the best treatment and able to maintain the stability of the product suspension during 6 weeks storage. The best syrup produced has an average (rather dislike – neutral) 4.9; 4.46; 4.90; and 4.5 in color, flavor, taste and stability respectively. The product has a range of viscosity values 1438-1516 cP, a pH value 7.51-7.73 and a total suspended solid value 5.95-6.09 mg / l during storage 6 weeks.
Optimization of concentration of stevia leaves (Stevia rebaudiana Bert.) and black tea: study on phytochemical composition and antioxidant activity of mixed stevia-black tea solution
Authors: Budianta T D W , Utomo A R , Raharjo S J
Published: June 2020

Tea is used as an ingredient used every day in the diet of Indonesian people, with many health benefits of tea including one as an anti-diabetes compound; while stevia is a natural sweetener to replace sugar. Both ingredients are expected to produce a synergy function as antidiabetic and antioxidant compounds. This study aims to find out how to combine black tea and stevia which both have high activity. This mixture was prepared as a basic ingredient for making stevia-blacktea-cocoa candy. The experimental design for the optimization of phenol content and antioxidant activity (DPPH free radical scavenging) in the process of mixing stevia-black tea was carried out using the Response Surface Method (RSM), a central composite with 2 factors, 1 replication, a total run order of 13, axial point 4, α = 1.414421. Dry stevia tea mixture - black tea leaves are brewed with boiling water (93 ± 2°C, 3 ± 0.5 minutes). From the experiment, it is concluded that after optimization, the highest result acquired is from a mixture of stevia 0.4446% (w/v) and black tea 0.3427% (w/v) with the results of a total phenol value of 326.3626 mgGAE/L sample and a DPPH of 64.5157 mgGAE/L sample.
Physical and mechanical properties of binderless medium density fiberboard (MDF) from coconut fiber
Authors: Puspaningrum T , Haris Y H , Sailah I , Yani M , Indrasti N S
Published: June 2020

Coconut fiber is a natural fiber extracted from coconut coir, a by-product of coconut based product. It is a potential material for fiberboard because it contains high cellulose and lignin which is similar to wood. Binderless medium density fiberboard (MDF) from coconut fiber was produced to reduce the consumption of wood and the emmission of synthetic adhesives such as urea formaldehyde using lignin as natural binder. The purpose of this research were to determine the physical and mechanical properties of MDF from coconut fiber based on SNI 01-4449-2006 and JIS A 5905:2003 and to investigate the effect of oxidation treatment, additional paraffin, and pressing time to the physical and mechanical properties of the fiberboard. The results showed that the fiberboards produced on this research had medium density of 0.44-0.56 g/cm3 which met the standard for MDF. Most of fiberboards from coconut fiber obtained in this study met the standard for physical properties such as density, moisture content, thickness swelling, and screw holding power. However, the mechanical properties such as modulus of elasticity, modulus of rupture, and internal bond of the fiberboards had not met the SNI 01-4449-2006 and JIS A 5905:2003 because of the lack of materials strength.
Potentials of biomass waste sources for heterogeneous catalyst production
Authors: Heryani H , Yanti N R
Published: June 2020

80% of processes in industries in developing countries generally use catalysts, both homogeneous and heterogeneous, derived from biomass. The research aimed to synthesize silica-based heterogeneous catalysts from waste of Sugar palm peel, Pineapple leaf and Orange peel, then carried out characterization of the heterogeneous catalyst used. The method started from the preparation of biomass waste, catalyst characterization including yield of SiO2 in extract, crystallinity, pore size, surface area and catalyst morphology. The yield of SiO2 extract from the Sugar palm peel was 12.281%; Pineapple leaf was 34.131%, and Orange peel was 30.102%. The diffractogram showed that all SiO2 catalyst synthesis had a crystalline phase; The pore size of the catalyst ranged from 3.918 to 5.6512 nm, and the surface area of the catalyst ranged from 14.2137-247 m2 g-1. Morphological test results showed that the catalyst SiO2 extract of Sugar palm peel was composed of small, regular pores while the catalyst SiO2 extract of Pineapple leaf was composed of globular blob, and the catalyst SiO2 extract of Orange peel was composed of very heterogeneous-tight-porous structures. Based on the test results, it is known that the synthesis of heterogeneous catalysts from biomass waste meets the characteristics of standard silica catalysts.
Development of energy self-sufficiency of agroindustry
Authors: Bantacut T , Romli M
Published: June 2020

Agroindustrial production processes consume considerable amount of energy and generate a lot of organic wastes. These wastes pollute the environment because of their rich organic compounds that will undergo decomposition. The main compounds contained in the waste are energy-carrying materials such as fibre, carbohydrates, protein, and oil/fat. The use of these materials as energy sources can save natural resources while cutting the load of environmental pollution. This paper discusses the assessment of adequacy of energy contained in the waste and proposes an integrated flow model to support the agroindustrial production process. The amount of waste obtained from the mass balance model is then multiplied by the energy content of each waste to obtain energy potential. Energy conversion is used to calculate steam (heat) and electricity needed to support the production process. Some examples are given to show that agroindustry has the potential to become an energy independent industry by applying the principle of less input and multiple outputs through the reuse, recovery, and recycling of the waste. Some future research recommendations are proposed to enable the implementation of energy self-sufficient agroindustry.
System analysis and design of aromatherapy products for innovation performance assessment toward competitive commercialization phase
Authors: Hasanah U , Djatna T , Raharja S , Bantacut T
Published: June 2020

Many new essential oil-based aromatherapy products invented by researchers failed to be commercialized and ended up in scientific publication. In fact, many commercialized products were unable to survive in market. In order to avoid these failures, performance of technology has to be assessed. Technology readiness assessment for innovation of aromatherapy products or services represent assuredness to the products. Technological readiness levels (TRLs) are widely adopted to assess the maturity of new technology. The business process model of innovation performance toward commercialization is conducted using System Development Life Cycle (SDLC) method. Through SDLC, the innovation performance system entity and Business Process Modelling Notation (BPMN) were constructed. BPMN which constructs notation of business process shows that the stakeholders involved in innovation performance assessment are innovator, evaluator, research center and investor. TRLs system of aromatherapy products were then developed for innovation performance assessment. It was able to define criteria, attributes, and metrics for performance assessment based on the basic concept of TRLs and aromatherapy. Finally, validation was done using Fuzzy Inference System (FIS). The result shows that the developed TRLs system of aromatherapy products is valid for performance assessment. It is also conforming to TRLs and aromatherapy basic concept.
Evaluation of salted fish supply chain policy at pasar Lawang Seketeng, Bogor
Authors: Hardjomidjojo H , Nadya C
Published: June 2020

Bogor is one of trading centers of salted fish for Bogor and surrounding areas. Salted fish products are marine fishery products that are salted and dried. Consumers like the products, but in the market, we could find harmful additives in them. The purpose of this research is to analyze the policy of salted fish supply chain from supplier to final consumer and formulate recommendation related to supervision and improvement of salted fish quality in Lawang Seketeng market, Bogor in order to assure that the salted fish products in the market are safe for people’s health. The results show that there are four types of salted fish products supply chain in Lawang Seketeng Bogor market. Based on the results analysis, it shows that the largest marketing margin does not mean the biggest profits for business actors. The choice of supply chain also depends on sales volume, lead-time, capital and warehouse capacity. The results based on confusion matrix also indicate that not all business actors could confirm the existence of dangerous additive content in their products. Based on SMiE-BAG model, monitoring and coaching system need to be implemented by the Bogor City Office of Industry in order to improve the safe supply chain performance for consumers.