bluuebunny/crossref_metadata_2025_split huggingface dataset:
Elemental Composition of Particulate Matter Air Pollution Collected Around Industrial Area in East Java
Authors: Santoso M , Lestiani D D , Kurniawati S , Damastuti E , Kusmartini I , Prakoso D , Dimas  , Triyambodo  , Rita  
Published: August 2019

Abstract
Air pollution is one of the key environmental and public health concerns in urban areas in Indonesia. The environment impacts are particularly severe in Java region where the cities have a combination of intense industrial activities, large populations, and increase of motor vehicle usage. This paper describes results from a detailed elemental characterization study conducted in Surabaya, East Java. Samples of airborne particulate matter, PM2.5 and PM2.5-10 were collected once a week using a Gent stacked filter sampler during 2012-2015. The samples were analyzed for their elemental composition and black carbon (BC) content by Energy Dispersive X-ray Fluorescence (EDXRF) and light absorption, respectively. The mass concentration of PM2.5 and PM10 ranged from 4.8 to 30.8 μg/m3 and 9.4 to 114.9 μg/m3, respectively. The annual average PM2.5 obtained during over the period of 2012 to 2015 would be in violation of the Indonesian annual average standard concentrations of 15 μg/m3. The distributions of the ratio of PM2.5 to PM10 is less than 0.5. The average ratio of BC concentrations compared to the PM2.5 concentrations was 22.6 %. Several composition of elemental concentration were also determined and the results showed that lead level in PM2.5 and PM2.5-10 was significantly higher with the maximum concentrations were 2779 and 2258 ng/m3 respectively. The Pb concentrations in Surabaya were tens to thousand times higher than in other cities. These results could be used to provide an overview of the measurements of the concentrations and composition of particulate air pollution in Surabaya and as a key in identification and estimation of pollutant sources to design the appropriate and right policies.
Greenhouse gases and air pollutants monitoring project around Jakarta megacity
Authors: Nishihashi M , Mukai H , Terao Y , Hashimoto S , Osonoi Y , Boer R , Ardiansyah M , Budianto B , Immanuel G S , Rakhman A , Nugroho R , Suwedi N , Rifai A , Ihsan I M , Sulaiman A , Gunawan D , Suharguniyawan E , Nugraha M S , Wattimena R C , Ilahi A F 
Published: August 2019

Abstract
National Institute for Environmental Studies (NIES) has been implementing a joint monitoring project of greenhouse gases (GHGs) and air pollutants in Indonesia with Bogor Agricultural University (IPB), Agency for the Assessment and Application of Technology (BPPT), and Meteorological, Climatological, and Geophysical Agency (BMKG). To estimate the amount of anthropogenic emissions from Jakarta megacity (Jabodetabek) and compare with city activities, we developed a ground-based comprehensive monitoring system of GHGs and air pollutants and installed it at Bogor (center of Bogor city) in March 2016, Serpong (Jakarta suburb) in August 2016, and Cibeureum (mountainous area, background-like site) in March 2017. The monitoring system consists of data acquisition/control units and the instruments for continuous measurements of CO2, CH4, CO, NOx, SO2, O3, aerosol concentrations (PM2.5, PM10, BC) and the chemical components, and meteorological parameters. Flask sampling of air is also done to analyze N2O, SF6, and carbon isotopes (13C, 14C) in CO2 and to validate the continuous measurement data. The result shows that CO2 mole fractions observed at three sites have clear diurnal variations representing the minimum values from 12 to 15 local time while the values at Bogor and Serpong are 6.8 and 7.1 ppm higher than Cibeureum, respectively.
Fine and Coarse Particle Concentration and Composition Measured In Urban And Non Urban Area Bandung, West Java - Indonesia
Authors: Lestari P , Hendra Y 
Published: August 2019

Abstract
Atmospheric particulate concentrations for fine (particulate matter less than 2.5 micron) and coarse particles (particle with diameter 2.5-10 micron) were measured in 2 locations which are Tegalega and Dago Pakar Bandung. Tegalega represents an urban mixed site while Dago Pakar represents rural site. Samples on each location were collected over one or two days-time periods during dry and wet season using Dichotomous sampler and Low Volume Sampler (LVS). Meteorological conditions were also measured simultaneously in the sampling locations. Samples were further analyzed to determine concentrations of particulate mass, elements, sulfate, nitrate and ammonium. The results from this study show that the concentrations of the particulate mass were higher during the dry season than in the wet season for both locations, mixed and background sites. The average fine particles concentrations at mixed site were 37 and 49 μg/m3 for the wet and dry seasons respectively. The average coarse particles concentrations were 27 and 33 μg/m3 for wet and dry seasons respectively. The average mass concentrations of fine particles at the rural site were 30 and 45 μg/m3 for wet and dry seasons respectively, while for the coarse particles the concentrations were 13 for wet season and 17 μg/m3 in dry season. Concentration of Black Carbon, sulfate, nitrate, and ammonium mostly existed in the fine fraction while crustal elements dominated the coarse fraction. Black Carbon, Sulfate, nitrate and ammonium contributed about 55 % to the total mass of the fine particles at Mixed site (Tegalega) and about 52 % at rural site (Dago Pakar) in dry season. Fine particulate contribute about 57 % to the PM10 in Tegalega and about 73% in Dago Pakar (rural site). This indicates that fine particles may come from other places (transported) in the rural area.
Performance of Principal Component Analysis to Classify Precipitation Type from Raindrop Size Distribution Data at Kototabang, Indonesia
Authors: Marzuki  , Hashiguchi H , Vonnisa M , Harmadi  , Shimomai T , Yoseva M , Saufina E 
Published: August 2019

Abstract
This study examines the use of principal component analysis (PCA) to classify the RDSD data at Kototabang, Indonesia. In addition to PCA with 6 attributes (hereinafter called PCA6) that had been developed by a previous researcher, this study also examines PCA with 7 attributes (PCA7) by adding radar reflectivity factor. The PCA is applied to the RDSD that had been classified by a wind profiler into Stratiform (S), deep convective (DC), shallow convective (SHC) and mixed stratiform/convective (MSC). The number of unclassified data is much smaller than that reported by previous study in which it is about 33-47% with PCA6 and 29-44% with PCA7. While the PCA classifies the same group for different rain type from wind profiler, especially for Group I (moderate Do
and large N

W
) and II (small Do
and N

W
), some differences are observed. Each rain type classified by wind profiler has different dominant group in which Group II is dominant for S, Group I and V (large Do
and low N

w
) are dominant for DC, Group I, IV (small Do
and large N

w
) and VI (small Do
and very large N

w
) are dominant for SHC and Group I is also dominant for MSC type.
Real Time Air Quality Monitoring System in Three Sites (Bogor, Cibeureum and Serpong)
Authors: Immanuel G S , Rakhman A , Budianto B , Boer R , Ardiansyah M , Hamid N , Gumilang l , Nishihashi M , Mukai H , Terao Y , Hashimoto S , Osonoi Y , Nugroho R , Suwedi N , Rifai A , Ihsan I M , Sulaiman A , Gunawan D , Suharguniyawan E , Nugraha M S , Wattimena R C 
Published: August 2019

Abstract
Center for Climate Risk and Opportunity Management of Bogor Agricultural University in collaboration with National Institute for Environmental Studies-Japan developed an on-line system to monitor real time air quality and greenhouse gases for three sites surrounding Jakarta area, i.e. Bogor (Center of Bogor city), Serpong (Jakarta suburb) and Cibeureum (mountainous area, background-like site). The system uses standards air-quality monitoring equipped with an array of gaseous and meteorological sensors. The system records data every minute and stores in local storage and sent automatically to a Dropbox every 6 hours. The data in the Dropbox is accessed using API and being processed and analysed using several modules to be converted into useful information and presented in a website. The website will display real time air quality for ozone (O3) and particulate matters (PM2.5 and PM10) and greenhouse gas data (CO2, CH4), Carbon monoxide (CO) Nitrogen Oxide (NOx), and Sulfur Dioxide (SO2), in the past 30-day including local weather data for the past 7 days. These data are then converted into an index indicating the status of the quality of the air surrounding the stations. The index is divided into five categories based on EPA air quality standard, namely good, moderate, unhealthy for sensitive group, unhealthy and very unhealthy. The system can provide the status of air quality index on a six hours basis and easy to be accessed by any stakeholder. The system allows local authorities, communities and industries to easily access and use the information for air quality management purposes and early warning.
Interaction of MJO and diurnal cycle observed by radiosonde data during the first YMC campaign in Bengkulu (November 2017 - January 2018)
Authors: Permana D S , Hutapea T D , Paski J A I , Praja A S , Fatkhuroyan  , Harsa H , Nuryanto D E , Kurniawan R , Makmur E E S , Ardiansyah D 
Published: August 2019

AbstractThe interaction of MJO and diurnal cycle in the Maritime Continent has been identified from previous studies but more observations are needed to understand it clearly. The first campaign of Years of the Maritime Continent (YMC) was conducted in Bengkulu from 16 November 2017 to 15 January 2018. Among various kind of observations, the three-hourly radiosonde sounding was conducted in Bengkulu station during the campaign. This study analyses the radiosonde data to investigate the thermodynamic profile of the mean diurnal cycle (MDC) at different MJO phases. The MDC of potential temperature anomaly (PTA), relative humidity, winds, convective available potential energy (CAPE) and total precipitable water (TPW) in different MJO phases were compared to the MDC values during the campaign (average condition). The obtained MDC PTA has a similar pattern with the results from the Pre-YMC campaign (November - December 2015). During the active MJO phase (3-4), RH is much higher and the zonal westerly wind is up to 6 m/s faster than the average condition at most of the time and elevation below 15 km, and TPW is amplified about 1-4 mm. In contrast, the condition is reversed during inactive MJO phase (1-2). In addition, the CAPE peaks occurred at 06 - 09 UTC and followed by TPW peaks 6 hours later.
The activity of Borneo Vortex as a trigger for extreme rain in West Borneo (case study: 24th – 25th January 2017)
Authors: Isnoor K F N , Firdianto P U , Rejeki H A 
Published: August 2019

Abstract
On January 24th – 25th, 2017, Borneo Vortex has occurred that started to form at 00.00 UTC and caused the extreme rain in some areas of West Borneo. It recorded 154.1 mm/day of heavy rain in the Ketapang regency, part of West Borneo region that indicated as the effect of Borneo Vortex. The objective of this study was to determine the activity of the Borneo Vortex phenomenon that triggers the extreme rain in some areas of West Borneo. Conducted data for this study obtained from ECMWF reanalysis data for some parameters such as vorticity, divergence, vertical velocity, and humidity transport. Those data used for providing an overview of atmospheric conditions during the Borneo Vortex. Rainfall data from six meteorological stations in West Borneo also used to identify the extreme rain. Regional and local scale analysis conducted to determine changes in atmospheric conditions that occur as triggers of extreme rain in the West Borneo region. The result showed that Borneo Vortex has a significant impact to the changing of atmospheric conditions at the area where close to the forming zone of Borneo Vortex and trigger to increase the convective cloud growing up which affects the increase of rainfall in some areas of West Borneo.
Ultrasound methods for determining the influence of yttrium in Mg-0.5Ca-xY
Authors: Savin A , Iftimie N , Steigmann R , Dobrescu G S , Istrate B , Munteanu C 
Published: August 2019

Abstract
Biodegradable materials are used as alternative implants for orthopedic applications due suitable strength, fatigue resistance, ductility and biocorrosion resistance which are features for biodegradable implants. Mechanical properties can be improved by adding alloying elements. Mg alloys have been designed to meet the requirements of bone repair implant materials by adding Calcium and Yttrium. Usually Ca is added to control corrosion rate of Mg alloys and thinning grain boundaries. The system is defined as Mg-0.5Ca-xY (x=0.5, 1, 1.5), varying the Y concentration in order to slow the degradation process. Beside morphological characterization with SEM, EDX, noninvasive testing is required to be carried out the determination of mechanical characteristics. The paper presents the influence of Yttrium over elastic properties of these alloys in order to choose the best values appropriate with human bones, using Resonant Ultrasound Spectroscopy and ultrasound method.
Brown band characteristics of aluminum cladding alloys
Authors: Ghiban B , Natra C 
Published: August 2019

Abstract
Clad materials are a variant of the typical composites, which consist of two or more materials joined on their interface surfaces. Clad materials as metallic composite materials are developed for the needs of user because the single metal often cannot satisfy it application conditions. That is, the advantage of clad materials is that the combination of different properties of materials can satisfy both the need of good mechanical properties and the demand of users such as industrial consumer. The purpose of this study is to study structural aspects in aluminium 3003 clad material with 4343 alloy, after different cladding time. Generally, Al 3003 material is Al–Mn alloy which has superior ductility, but the strength and hardness are low. Aluminium series 4xxx material is Al–Si alloy with high strength and hardness, but low ductility. In our paper we determine the grain sizes of the coated aluminium alloys, before and after cladding, and also the corrosion potentials of these aluminium cladding alloys.
Recovery of LiCoO2 compound from cathodic paste of waste LIBs, by ultrasonography in lactic acid solution
Authors: Bratosin I , Toma C M , Vasile E , Ghica V G , Buzatu M , Petrescu M I , Kovács T A , Necşulescu A D , Iacob G 
Published: August 2019

Abstract
Lithium-ion batteries (LIBs) are use in electric devices such as phones, cameras, laptops, etc. and also for electric automotive propulsion. More consumption means more amount of scrap. The wastes of LIBs contain rare and high value metals: Co (32 $/kg), Li, Ni, Cu, Al. Many recycling processes were developed with the purpose of recovering metals contained in used batteries. This paper presents a method for separation active cathodic paste (containing LiCoO2 compound) from the aluminum cathode using a solution of lactic acid and an ultrasonic bath. Cathodic paste has been detached from aluminum foils and analyzed by scanning electron microscopy (SEM) and X-ray diffractometry. The effects of the lactic acid concentration and the power of ultrasonic bath on separation efficiency were investigated.
Microencapsulated PCMs for thermal energy storage in the range 300-500 °C: pilot-testing
Authors: Tudor A I , Neagoe C , Piticescu R R , Romero-Sanchez M D 
Published: August 2019

Abstract
Phase Change Materials (PCM) became one of the most interesting research directions toward improving the efficiency of concentrated solar power plants. Different methods were proposed to increase storage capacity as a result of the encapsulation protection and efficient thermal energy storage for high operating temperatures. Here, we present a soft chemical process to encapsulate inorganic KNO3 as PCM system using nanostructured ZnO shell material, based on hydrothermal synthesis followed by spray drying and their thermal conductivity measurements are discussed. A unique micro-pilot equipment for the functional characterization of microencapsulated PCMs was designed and built for real time monitoring of thermal properties of these materials.
Smart lock system for Airbnb Platform using global navigation satellite system services
Authors: Matasaru P D 
Published: August 2019

Abstract
Over the last two decades, the world changes have occurred faster and faster. The services provided by GNSS represent major business drivers. Innovative and effective GNSS applications such as location-based smart-phone and hand-held device apps, navigation services and fleet management represent value-added services. The smart lock system is based on the Airbnb [1] platform for lease or rent short-term lodging and solves both a technical/operational limitation and trustfulness issue [2]. The solution is to link the housing, the reservation number and the mobile phone of the customer so that, with the help of localization services, the smart lock of the apartment could be opened only by the person wearing the mobile device, when that person reaches the destination, and only in the specified period of time when the reservation is made. The proposed solution adds value to the already implemented idea, and the targeted market is almost worldwide and can be extended also for car rentals and other rent services.
Visible light wireless data communication in industrial environments
Authors: Riurean S , Leba M , Ionica A , Stoicuta O , Buioca C 
Published: August 2019

Abstract
Significant implementations and encouraging results have already been achieved using visible light communication (VLC) technology for different applications from indoor to free space optics (FSO) and even underwater communication. The LED light fixtures are about to be used with dual functionality - illumination and fast wireless data communication - and when the technology will become mature enough, the general costs for both will considerably decrease. However, especially due to a complex multipath channel impulse response (CIR) evaluation, there are few research in VLC applied in industrial environments. At the same time, in the non-Line of Sight (NLoS) VLC setup with mobile optical transmitter (oTx) and fixed optical receiver (oRx) considered here, both the path loss and multipath-induced dispersion significantly limits the link performance. In this paper, we investigate the CIR into indoor industrial environments. We take into consideration both Intrinsic Optical Properties in Industrial Environments (IOPIEs) and Apparent Optical Properties (AOPs) in Industrial Environments. The VLC setup complexity such as oTx and oRx position and orientation, the geometry and the nature of the indoor surfaces (diffuse or specular) and appropriate positioning of both oTx and oRx required for a suitable implementation of the VLC. The VLC system proposed is also investigate in this work based on data acquisition, simulation and analysis according the ARX mathematical model.
Influence of speed bumps on braking distance
Authors: Maftei A , Dontu A I , Gaiginschi L , Agape I 
Published: August 2019

Abstract
This paper aims to dismiss the popular belief that speed bumps reduce the vehicle speeds or reduce the braking distance. In recent years, the implementation of speed bumps on public roads in Romania has increased. The correct understanding of the role of the speed bump has been misunderstood by the Romanian authorities who use them to slow down traffic on highly used roads. More advanced countries in the segment of traffic controlling and traffic safety have special rules for speed humps and speed bumps. This paper is concerned with the theoretical and experimental study of the performance of the vehicle in emergency braking when passing over such a speed bump. The theoretical study is done by using mathematic formulas and the experimental study is done by using a real car and testing it’s braking distance in normal weather on a dry road that has a speed bump implemented. The study shows the influence of the induced forces from the speed bump in the car dynamics, once because of the low adhesion surface of a worn out speed bump and secondly because of the changes in normal force on the wheel after passing over the hump, the influence of the suspension loading is also backed up by the Tr. Ori study.
Design of a monitoring, alert and control system for indoor exhibition spaces
Authors: Diaconescu V D , Scripcariu L , Mătăsaru P D , Vornicu N , Muraru C , Loghin C 
Published: August 2019

Abstract
The environmental parameters (temperature, relative humidity, UV factor, light intensity and others) of an indoor exhibition space must be monitored and controlled in order to ensure proper conditions for artifacts' preservation. This can be done by a monitoring, alert and control system (MACS) consisting of a sensor network, a communication infrastructure and a central processing device. Data are measured and collected by sensors, sent by the communication network and, finally, stored and processed into the central node (NC). Based on the analysis of data, decisions are made, alerts are sent to the responsible personnel, by short messages to the mobile phone or by email, and commands are sent to the actuators in order to turn on the environmental control devices (air conditioners, heating or light control devices and others). The goal of MACS is to provide efficiently and economically a stable quality of the indoor exhibition environment. A case study is done for an exhibition room from the Metropolitan Museum of Iasi.
Assessment of soil quality in an area with hydrocarbon exploitation activities
Authors: Dragan V M , Tudor B D , Pintilie L G 
Published: August 2019

Abstract
The paper presents an analysis of the soil quality, in the petroleum field from Independenta, Galati. The study was determined by the fact that the hydrocarbon spills from the activity carried out here can have a significant impact on the environment. The paper presents the determinations carried out on soil samples related to heavy metal content and pH. Samples were taken from different areas, starting from a contaminated source, and continuing with the surroundings. For each area, three samples were taken at different levels of depth. Concentration values were compared with the legislation [1] setting out the procedures and technical rules for identifying environmental damage in order to determine the responsibilities for remedying them.