bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Electro-spinning applied Voltage on Electro-spun EPS Membranes Thickness and Fibers Diameters
Authors: Jalal Noor M. , Jabur Akram R. , Allami Shrok 
Published: July 2021

Abstract
Expanded Polystyrene (EPS) solutions with a percentage of (30 wt. %) were prepared followed by the fabrication of micro-fibers membranes by electrospinning technique. To study the voltage’s effect of electrospinning device on EPS micro-fibers membranes, different voltages (10, 12, 15, 18, 24, and 30) KV were experimented. The characterization of the electro-spun membranes were made by Fourier transform infrared spectroscopy (FTIR) and the scanning electron microscopy (SEM) for morphological and thickness analysis. The results showed that although electro-spun EPS membranes prepared by 30 KV, they had the minimum membranes thickness and the highest average fiber diameter. As it is cleared by SEM images, increasing the electro-spinning voltage leads to increasing the average fiber diameter membranes. With increasing the electros-pinning voltage, the fibers prefer to deposit on each and result in decreasing the distance between the collector and the needle, hence higher average fiber diameter produced. The thickness of the electro-spun membranes decreases with the electro-spinning voltage as a result of the higher repulsion between the electro-spun fibers which reduce the deposition of these fibers on the collector.
Carrying capacity of mangrove tourism in the district of Cilamaya Wetan, Karawang regency, West Java province
Authors: Kurniawansyah A , Pin T G , Rahatiningtyas N 
Published: July 2021

Abstract
The study was conducted in the District of Cilamaya Wetan, Karawang Regency, West Java Province from November to December 2019. The purpose of this study was to analyze the carrying capacity of tourism in mangrove tourism areas. Based on the results in the field, the carrying capacity of tourism is only found in Sukakerta Village with the wide area that can be used as tourism and there is a visit by tourists, precisely in the Tangkolak Maritime Center which is able to accommodate as many as 1.345 person with the time provided in the development of the area by tour manager, that is for 24 hours/day. Tourist activities based on interviews include sitting relaxed, taking photo, walking down the road, enjoying the scenery, and planting mangrove seedlings scattered in Sukakerta Village.
Groundwater quality of unconfined aquifer in Demak Regency, Indonesia
Authors: Putranto T T , Susanto N , Pangestuti D R 
Published: July 2021

Abstract
Industry and society utilize groundwater to meet their daily needs. The study area is located in Demak Regency, which is located in the northern part of Java Island. Administratively, Demak Regency covers 14 districts with a total population of up to 1.16 million inhabitants. The utilization of unconfined groundwater is an alternative to meet the needs of the community. The condition of the unconfined aquifer, which is the source of fresh water for the community, must meet the standards for public health. Thus, it needs a fundamental assessment of the condition of the unconfined aquifer in Demak Regency. The evaluation of unconfined aquifer is focused on physical and hydrogeochemical analysis. The method used was a field campaign by measuring the groundwater depth and analyzing 30 groundwater samples for physical and chemical analysis. The results of measurements of pH values in groundwater samples in the study area are between 6.68-7.84. The high pH is in the Districts of Mranggen and Kebonagung. Furthermore, the value of electrical conductivity (EC) is between 678-3,130 µS/cm. The samples that are close to the Java Sea conduct a higher EC value, which is located in the Sayung, Karangengah, Bonang, and Wedung Districts.
Re-modeling kaligarang fault base on satellite gravity data
Authors: Indriana R D , Nurwidyanto M I , Widada S 
Published: July 2021

Abstract
The Kaligarang River heading North-South divides the region of Semarang. The Dutch Colonial Government recorded the territory of Semarang on January 19, 1856, shaken by an earthquake on the mainland epicenter with the strength of the V-VI MMI. Fault Kaligarang has a sliding rate of slip (slip rate) of 4.5 mm per year. The value of rock slip rate is relatively very small, but if accumulated over a long period, its value can increase and it will form an earthquake when energy is released. Kaligarang fault is still active and can cause another earthquake. Estimates of active Kaligarang fault are analyzed using different analytical methods by combining 3 methods (magnetic, gravity, and geological). Preliminary studies were conducted using the gravity method used satellite data. The purpose of this study was to determine the ability of satellite data to be used as supporting data for preliminary research and also as complementary data. There are similarities in the results of inversion modeling with using GgmPlus data and geological data in the field. This result cannot prove the kaligarang fault because kaligarang fault is a transform fault. The distribution of subsurface mass can prove the existence of faults in the Semarang area but not at all, so that terrestrial data are still needed to obtain a more complete subsurface geological structure. Others method are needed to complete and prove the Kaligarang fault is active.
The potential attractiveness of development mangrove ecotourism in Karawang regency
Authors: Hartati A P , Pin T G 
Published: July 2021

Abstract
The mangrove ecosystem is one of the ecosystems that are very important for the life of flora, fauna as well as the people around it. The development of mangrove ecosystems into ecotourism is one way to the sustainability of mangrove ecosystems so that have a negative impact on the lives of their creatures. The development of ecotourism needs to be supported by tourist attractiveness as well as learning to tourists to care about their environment in accordance with the principles of ecotourism namely responsible travel to natural areas, conserving the environment and improving the well-being of local people. This paper focuses on the potential attractiveness of ecotourism development in Karawang Regency. The method used in this research is to do calculations using weights and scoring. The results showed that Sukakerta Village has a potential attractive attraction for mangrove ecotourism development in Karawang Regency, while Rawagempol Kulon and Tambaksari Village have an unattractive potential for mangrove ecotourism development and other villages have the attractive potential for mangrove ecotourism development due to inadequate facilities and accessibility.
Spatial pattern of fishing activities at Yogyakarta waters (case study: fishers at Depok beach, Parangtritis village, Bantul regency)
Authors: Fadlullah M , Susiloningtyas D , Handayani T 
Published: July 2021

Abstract
Capture fisheries are one form of fishery resource utilization by fisher in the waters. With open access, fishers are free to catch fish in the waters. Yogyakarta waters are one of the waters with capture fisheries activities that continue to develop until now, especially on Bantul Regency. Fishers on Depok Beach are the largest and most developed communities in Bantul Regency. Sustainable fisheries resource management is formed in Yogyakarta waters by analyzing fishers’ behavior on Depok Beach in fishing activities. Survey methods and participatory mapping were carried out to obtain fisher’s characteristics, water conditions, fishing grounds locations, and fish catch variation. Statistical descriptive analysis, map overlays, and correlations are used in this study. The fishing community on Depok Beach is dominated by migrant fisher who come from Cilacap. Fishing activities are still very dependent on water conditions both during high and low seasons. Fishing grounds can be up to 10 miles in the high season, while the low season tends to be closer to land. The type of fish catch varies each month, dominated by demersal fish. Beltfish (Trichiurus lepturus) is a fish caught commodity during high and low seasons. Meanwhile, white pomfret (Pampus argenteus), banana prawn (Penaeus merguiensis), scalloped spiny lobster (Panulirus homorus) are mostly found in the high season, and mackerel tuna (Euthynnus affinis) in the low season.
The effect of lard concentration and ozonation on changes in polarization angle of olive oil
Authors: Saputra F A , Azam M , Arianto F , Sofjan K F , Sugito H , Alkian I 
Published: July 2021

Abstract
This research aims to analyze the effect of ozone exposure time and lard mixture on the polarization angle of transmission of olive oil. The study uses a transmission polarization method with a laser (λ = 532 nm) as a light source. The research sample in the form of olive oil mixed with lard at a concentration of 10, 20, 40, and 80%, with an ozone exposure time of 0-30 minutes. The sample is subjected to external electric fields with variations from 0-4.5 x 102 kV/m to increase the change’s polarization angle. The results showed that the change in polarization angle would change linearly with the increase in lard concentration with olive oil. Olive oil with a low concentration of lard (10%) experienced an increase in the change in polarization angle with a value of 0.31 ° due to the effect of 90 minutes of ozone exposure. In general, the results of the study showed that increased concentrations of lard, ozone exposure time, electric field strengths caused an increase in changes in the polarization angle in a mixture of olive oil and lard.
Measurement of ground response of Semarang coastal region risk of earthquakes by Horizontal To Vertical Spectral Ratio (HVSR) microtremor method
Authors: Irham M N , Zainuri M , Yuliyanto G. , Wirasatriya A 
Published: July 2021

Abstract
The study was conducted to determine the response of the Semarang Coastal area to eartquakes by measuring the micro tremor response with 3 component seismographs at 110 locations on the Semarang coastal region that were distributed almost evenly. From the micro tremor data, it is processed using Gyopsy software to get the dominant frequency and amplification values. The dominant frequency value and its amplification are then made a map with surfer 13, and the results are then overlaid on the RBI map for qualitative interpretation. The results of this study are dominant frequency and their amplification in the Semarang coastal region maps. The dominant frequency values range from 0.5 Hz - 10 Hz. Based on the dominant frequency values, can be grouped into three categories, namely low frequency values that are less than 2.5 Hz associated with sediment thickness values of more than 30 m and areas with moderate frequencies with values between 2.5 - 4 Hz associated with sediment thickness 10 - 30 m, and high frequency indigo between 4 Hz - 10 Hz is associated with a sediment thickness of 5-10 m. Areas with low frequencies dominate the study area. Areas with medium and high frequency values are only a small part of the study area. The amplification values vary between 0.5 - 8.5. While the amplification value can also be grouped into 3 parts, namely the amplification of less than 2.75 associated with hard rocks almost dominates the central part of the study area, the amplification value between 2.75 - 5.15 associated rocks or soil with moderate violence is only a small part as between low and high values in the study area, and values of more than 5.15 associated with soft soils that dominate the northern and the southern part of the study area.. If the area around Semarang has an earthquake, the location with a large amplification will be more prone to earthquake disasters.
Detecting hot spring manifestations based on gravity data satellite on mountain Lawu
Authors: Setyawan A , Khusna L M , Suseno J E , Rina D I , Yulianto T , Aribowo Y 
Published: July 2021

Abstract
Mount Lawu is in the transition zone among Western and Eastern Java. Gunung Lawu consists of two volcanic systems separated by the East-West trending Cemorosewu Fault. The geology of Mount Lawu is dominated by Andesite Lava. Mount Lawu area has a geothermal energy prospect with indications of the appearance of hot springs and fumaroles. 2D modeling of subsurface structure of Mount Lawu’s manifestation area has been carried out using gravity method. The aims of study to investigate the appearance of hot springsis related with fault structure. Data used using GGMplus (Gravity model plus) satellite image data in the form of gravity disturbance or anomaly free air with spaces each points is 200 meter respectively. GGMplus gravity anomaly data are performed bouger correction and field correction to produce a complete bouger anomaly (ABL). The ABL results present that the anomaly corresponds to the geological map, otherwise the higher topography correlated with with the smaller value of the gravity anomaly. 2D modelling and interpretation has done based on ABL results. Based on 2D modeling the appearance of hot springs is controlled by the presence of faults, moreover Mount Lawu consists of three layers of rock, namely Tuff with a density of 1.27-2.66 gr / cm3, andesite lava 2.90 gr / cm3, and basalt lava 2.99 gr / cm3.The results of study are expected be used as a reference and policy decision in geothermal development of Mount. Lawu.
Anatomic information of urinary tract MSCT using tracking and intravenous urography in case of urolithiasis
Authors: Sulaksono N , Kurniawati A , Jannah M 
Published: July 2021

Abstract
Urolithiasis is a stone in the urinary tract area. In previous studies, the use of reconstructed tracking on Multislice Computed Tomography (MSCT) non-contrast urography was able to produce an image of the urinary tract. Intravenous Urography (IVU) examination is a radiographic examination of the urinary system using positive contrast media that is inserted intravenously. This study aims to optimization of information on the anatomy of the urinary tract is needed to help diagnose urolithiasis. This type of research is an experimental observational approach with a comparison of the MSCT anatomical information tracking technique with an IVU examination. The subjects of this study were patients who performed an MSCT and IVU examination with 3 respondents from Radiology Specialists. The data collected is from April to November 2019. The sample used was 60 samples. Non-contrast urography MSCT with tracking technique obtained more optimal results in assessing each anatomy compared to IVU. The overall value of anatomical image non contrast urographic MSCT images with tracking techniques obtained a total value of 2179, While the overall value of the anatomical image on the IVU examination was 1977. MSCT non-contrast urography with tracking is more optimal in establishing the diagnosis in cases of urolithiasis, but IVU examination excels in assessing the function of the urinary tract.
The effect of magnification technique on the optical density and size of object on mammography
Authors: Setiawati E , Arifin Z , Emisen M P , Anam C , Margiantono A 
Published: July 2021

Abstract
To visualize the existence of micro-calcifications in mammography there are a number of ways carried out including by the magnification technique. This study evaluates the effect of magnification technique on optical density (OD) and size of the objects of the image produced on mammography. The objects used were three circular coins. Source to image distance (SID) was 65 cm, with a focal spot size of 0.1 cm, a combination of targets/filters was Mo/Mo with a filter’s thickness of 30 µm. The tube loading was 100 mAs, the tube voltage was 27 kVp, and the magnification was in the range of 1.00 - 2.00 times with an increase of 0.25. Measurement of OD and size of the objects was using an ImageJ software. The results of this study revealed that the OD value decreases proportional to the magnification. The OD values calculated on the 2x magnification were 13.74, 14.26, and 13.44% lower than 1.0 magnification (without magnification), while the resulting image will be oval in proportion to the position of the coin from the chest wall and the magnification. An implementation of the magnification method in the mammography must be carried out with caution. In addition to a benefit to larger appear of micro-calcification, it also causes a decrease in OD and distortion of objects in the image.
Tomographic system for transparent objects using visible light as a source of radiation
Authors: Widodo C E , Adi K 
Published: July 2021

Abstract
In this paper we present a tomography system for transparent objects using visible light radiation sources. Transparent objects are used so that visible light can penetrate objects. Objects are rotated by moving angle of 2 ° per step to get a full rotation or 360 °. Each object moves by 2 ° then the detector will capture images that have been irradiated by visible light and obtain an original image of 180 images. Of the 180 images, a cross-sectional sinogram image is made in the center of the object. The synogram is then reconstructed using the backprojection method to produce tomographic images. The results of this research are a tomographic system consisting of light sources, cameras and reconstruction software. This system succeeded in making a tomographic image in the form of a cross-sectional image from a glass bottle.
Analysis study of doses distribution in lung cancer using 3D Slicer
Authors: Amaliya R , Aisyah St , Hariyanto A P , Jannah F , Sarasechan A , Nasori  , Rubiyanto A , Haekal M , Endarko  , Nainggolan A 
Published: July 2021

Abstract
Lung cancer has decreased mortality rates each year that can treat with radiotherapy. The radiotherapy module is own by 3D Slicer that is open-source software. The purpose is to determine the distribution of doses on the dose-volume histogram (DVH) and the percentage of the suitability of the 3D Slicer simulation results with the Treatment Planning System (TPS) at MRCCC Siloam Hospital. The data used were three Computed Tomographic images of lung cancer patients obtained from the MRCCC Siloam Hospital. The parameters analyzed included volume, the dose of the target volume, and organ at risk (OAR). Analytical studies were carried out by comparing the target volume with The International Commission on Radiation Unit (ICRU) Report 83 and comparing the OAR regarding dose tolerance. The dose distribution of all patients from the simulated 3D slicer for OAR met the tolerance limit reference recommendations. The Planning Target Volume (PTV) of all patients also matched the evaluation recommended by the ICRU Report 83. The percentage value of the suitability between the 3D Slicer and TPS results for all patients was above 95%. It shows that 3D Slicer can use as a recommendation software for initial radiotherapy planning studies.
Application of spectral subtraction denoising on 3 T MRI in lumbar spine (herniated nucleus pulposus case) GRAPPA to improve CNR
Authors: Maulidya I , Fatimah  , Santoso G 
Published: July 2021

Abstract
Using of r-factor which is higher can speed up the scanning time in parallel imaging techniques but causes a decrease in contrast to noise ratio (CNR), thus causing image quality not optimal in the MRI Lumbar examination of the T2WI turbo spin echo (TSE) generalized autocalibrating partially parallel acqusitions (GRAPPA) herniated nucleus pulposus case. Fast scanning time is needed by using a higher r-factor to get the optimal image with improved CNR. Spectral subtraction denoising (SSD) is one of filter technique that can be used to improve image quality, CNR is one of the parameters used in determine image quality, SSD is expected to be able improved CNR to have good image quality. The purpose was to measure changes of image quality CNR. This type of research is a pre-experimental research with a one group pretest-posttest design to determine the differences in CNR quality by applying SSD to the r-factor variations in the lumbar MRI image of T2WI TSE GRAPPA sagital. Data were analyzed by statistical tests, friedman. There is a difference in image quality in variations acceleration factor with increase CNR in GRAPPA parallel imaging technique with a value of p <0.05, obtained r-factor 3 as the optimal r-factor the highest mean rank value with the application of SSD.
Radiation dose reduction on cervical spine radiographic examination by using posteroanterior oblique projection
Authors: Sulistiyadi A H , Rochmayanti D , Dartini D , Wibowo A S , Handoko B D , Indrati R 
Published: July 2021

Abstract
Cervical spine radiographic examination with 450 oblique projection can be performed using anteroposterior (AP) oblique or posteroanterior (PA) oblique. There are radiosensitive organs that are exposed to radiation during the examination. This study aims to determine the radiation dose (Entrance Surface Dose) received by thyroid, eye, and breast on radiographic examination in AP oblique and PA oblique projections. Radiographic phantom with equivalent structure to human body was positioned in AP oblique and PA oblique. A modificated protractor was used to maintain the positioning precision. The optimum exposure factors (confirmed by Exposure Index) were used. Radiation dose on the thyroid, the eye, and the breast were measured 9 times using Termoluminisence Dosemeter for each positioning techniques. Data were analyzed by independent t-test. The average radiation dose received by the thyroid, the breast, and the eye between AP oblique and PA oblique projections were (0.915 and 0.174), (0.059 and 0.025), and (0.234 and 0.079), respectively. There were significant differences in the radiation dose received by the thyroid (p value <0.05), the breast (p value <0.05), and the eye (p value <0.05). The radiation dose were lower (81% on thyroid), (58% on breast), (66% on eye) by using PA oblique projection.
Investigation of a method for creating neonatal chest phantom using 3D printer
Authors: Fujibuchi T 
Published: July 2021

Abstract
Newborns and children are more sensitive to radiation and have a longer life expectancy than adults. Therefore, efforts should be made to reduce unnecessary exposure by optimizing the dose when conducting radiological examinations. In order to optimize the dose in neonatal X-ray examinations, we studied a method to create inexpensive and precise neonatal chest heterogeneous anthropomorphic phantoms using a 3 dimensional (3D) printer. Phantoms were created by constructing segments of computed tomography (CT) volume data acquired from the chest of a 6-month-old, excluding the bone and lung tissue, using 3D image analysis software. The material used for 3D printing was polylactic acid; multiple printing densities were investigated. Gypsum and urethane foam were used as bone- and lung-equivalent substances. The CT values of the lung tissue in the phantom were almost the same as those of the air, and those of the bone tissue showed a range of CT values dependent on the print density. By visual evaluation, it was established that the shapes of the original lungs and heart were reproduced in the images of the phantom. The creation of an inexpensive and precise neonatal chest phantom using a 3D printer is useful.