bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of a compact 406 nm diode laser-based cavity-enhanced spectrometer for high-sensitive detection of NO2 levels in exhaust gas
Authors: Pal Ardhendu , Mondal Koushik , Panda Biswajit , Pradhan Manik 
Published: June 2023

Abstract
Nitrogen dioxide (NO2) is an important air pollutant due to its environmental impact and adverse effects on human health. It is released into the atmosphere primarily through anthropogenic activities. Here, we report on the development of a simple, compact, and cost-effective robust optical detection method exploiting cavity-enhanced absorption spectroscopy for high-sensitive and selective measurement of NO2 levels in real-time using a visible diode laser operating at 406 nm. A typical detection limit of ∼330 ppb for NO2 was achieved with an optimum acquisition time of ∼3.9 s, at optimal cavity pressure of 100 Torr. The sensor system demonstrates an effective optical path-length of 180 m in a high-finesse 50 cm long optical cavity in an interference-free spectral region and aerosol-free conditions. The spectrometer was optimized, calibrated, and demonstrated for the detection of NO2 levels in vehicular exhaust gases.
Predictions of nuclear charge radii*
Authors: Li Guang-Sheng , Xu Cheng , Bao Man 
Published: June 2023

Abstract
In this study, we improve the relations of the charge-radius difference of two isotopes by considering a term that relates to the proton number and the parity of the neutron number. The correction reduces the root-mean-squared deviation to 0.0041 fm for 651 nuclei with a neutron number larger than 20, in comparison with experimental data compiled in the CR2013 database. The improved relations are combined with local relations consisting of the charge radii of four neighboring nuclei. These combinations also prove to be efficient in describing and predicting nuclear charge radii and can reflect the structure evolutions of nuclei. Our predictions of 2467 unknown nuclear charge radii at competitive accuracy, which are calculated using these two types of relations, are tabulated in the Supplemental Material.
Radiative 9Be(n,γ0+1+2+3+4+5)10Be reaction rate in the potential cluster model*
Authors: Dubovichenko S.B. , Yeleusheva B.M. , Burkova N.A. , Tkachenko A.S. 
Published: June 2023

Abstract
Within the framework of the modified potential cluster model with forbidden states, the total cross-sections of radiative n
9Be capture to the ground and five low-lying excited states are calculated at energies from 10−2 eV up to 5 MeV. The thermal cross-section

mb is in good agreement with experimental data. We considered five resonances at the excitation energies E

x
from 7.371 MeV up to 10.570 MeV corresponding to the following states with

(E

x
, MeV):

(7.371),

(7.542),

(9.4),

(9.56), and

(10.570). The partial and total 9Be(n,γ
0+1+2+3+4+5)10Be reaction rates are calculated at temperatures from 0.001 to 10 T
9. Contrary to the available data, we propose that the rise in the reaction rate near factor five at T
9 \gt 1 is mainly due to the first

(E

R
= 0.559 MeV) resonance. We foresee this contrast as arising from different model approaches.
Soft pattern of Rutherford scattering from heavy target mass expansion*
Authors: Jia 贾 Yu 宇 , Zhang 张 Jia-Yue 佳玥 
Published: June 2023

Abstract
We investigate the soft behavior of the tree-level Rutherford scattering process. We consider two types of Rutherford scattering processes: One in which a low-energy massless point-like projectile (say, a spin-

or spin-

electron) hits a static massive composite target particle carrying various spins (up to spin-

), and one where a slowly-moving light projectile hits a heavy static composite target. For the first type, the unpolarized cross sections in the laboratory frame are found to exhibit universal forms in the first two orders of

expansion yet differ at the next-to-next-to-leading order (though some terms at this order still remain universal or depend on the target spin in a definite manner). For the second type, at the lowest order in electron velocity expansion, through all orders in

, the unpolarized cross section is universal (also not sensitive to the projectile spin). The universality partially breaks down at relative order-

, though some terms at this order are still universal or depend on the target spin in a specific manner. We also employ the effective field theory approach to reproduce the soft behavior of the differential cross sections for when the target particle is a composite spin-

fermion.
Risk analysis of landslide disaster in Pati Regency, Central Java Province
Authors: Muryani Chatarina , Koesuma Sorja , Yusup Yasin , Wijayanti Pipit , Hidayat Andian 
Published: June 2023

Abstract
Landslide is one of the disasters that often occurs in Pati Regency. This study aims to analyze the risk of landslides in Pati Regency. The landslide risk index in Pati Regency is carried out by analyzing three components: the hazard index, vulnerability, and capacity according to BNPB head regulation No. 2 the year 2012 concerning General Guidelines for Disaster Risk Assessment. The results showed a high landslide risk index in 49 villages out of 406 throughout Pati Regency. The sub-districts with the highest landslide risk index are Sukolilo District with nine villages and Gunungwungkal with seven villages. The high-risk index in the area is influenced by the high danger of landslides and the lack of existing capacity. The recommended recommendations include installing EWS, socializing knowledge on disaster preparedness, improving emergency response management, increasing community participation, evaluating RTRW, and reviewing vegetation types.
Synthesis of PVDF-SiO2 nanofiber membrane using electrospinning multi-jet vertical on conveyor collector as a lithium-ion battery separator
Authors: Widiyandari Hendri , Ahmad Fauzan Nur , Suryana Risa , Ade Putra Oki 
Published: June 2023

Abstract
Research on synthesis of PVDF-SiO2 nanofiber membrane by electrospinning multi-jet vertical method on conveyor collector as a lithium-ion battery separator was systematically investigated. Various voltages of 15 kV, 16 kV, and 17 kV and types of PVDF such as Aldrich, Solvay, and both mixtures were used for nanofiber membrane synthesis. The nanofiber membrane was synthesized for 4 hours with a distance between the tip of the needle, and the collector was 10 cm, with a flow rate of 2.6 mL/hour and a collector speed of 37 rpm. Furthermore, the results were tested for the physicochemical properties of the nanofiber. Solution B (PVDF Solvay) treated with 17kV has the largest porosity percentage value of membrane, which was 84.659%. The optimum shrinkage ratio test was from solution A (PVDF Aldrich) with 15 kV, 16 kV, and 17 kV voltages. The smallest average diameter nanofiber was obtained from solution B (PVDF Solvay) with a voltage of 15kV. The FTIR spectrum was not affected by voltages variations. In addition, the nanofiber membrane was assembled in the battery using Aldrich, Solvay, and mixed PVDF types. The battery was then tested for the electrochemical properties of the lithium-ion battery. Solution B (Solvay) has the optimum charge-discharge results showing a specific charge of 107.472 mAh/g and a specific discharge of 77.990 mAh/g.
Characterization of photoacoustic tomography based on 450 nm visible light and its application for detection of formalin fish meat
Authors: Julianto Rian , Mujtahid Anas Ahmad , Mitrayana  
Published: June 2023

Abstract
This research is motivated by the behavior in the community that preserves fish meat using a dangerous chemical substance, namely formalin. Research has been carried out on the detection of formalin fish meat using a 450 nm light-based laser photoacoustic imaging tool to characterize the photoacoustic image system to detect formalin fish meat, determining the relationship of the average sound intensity obtained, as well as differences in photoacoustic tomography images to the concentration and duration values—immersion in formalin solution. Variations in the concentration of the formalin solution used were 10%, 30%, 50%, 70%, and 90%, as well as variations in the duration of immersion for 24 hours, 48 hours, 72 hours, 96 hours, and 120 hours. The results of this study indicate that a photoacoustic imaging device based on a 450 diode laser can distinguish tomographic photoacoustic images from the tested samples. The increase in the concentration value and the immersion time of the formalin solution resulted in a linear increase in the acoustic intensity level.
Effect of Dielectric Barrier Discharge (DBD) plasma treatment in drinking water on physical, chemical, and biological parameters
Authors: Ukhtiyah Hanifa , Kusumandari Kusumandari , Endah Saraswati Teguh 
Published: June 2023

Abstract
This research aimed to determine the effect of Dielectric Barrier Discharge (DBD) plasma treatment on the physical, chemical, and biological parameters of drinking water. This research was conducted using a DBD plasma reactor with treatment time were 0, 5, 10, 15 and 20 minutes at AC voltage 5 kV. The results showed that there was an effect of DBD plasma treatment on the physical, chemical, and biological parameters of drinking water. The value of Total Dissolved Solid (TDS) and the number of bacteria in drinking water given DBD plasma treatment decreased with the lowest values of 148.33 ppm and 4 MPN/100 ml after sample treatment for 20 minutes. The pH value is stable, which is between 7-8. Based on this research, it can be seen that there is an effect of DBD plasma treatment on the physical, chemical, and biological parameters of drinking water.
Description of the 1907 Aceh tsunami: impact (height, inundation and the travel time) on Cities of Banda Aceh, Meulaboh and Gunung Sitoli, Indonesia
Authors: Retno Palupi Indriati , Raharjo Wiji , Harris Ronald A 
Published: June 2023

Abstract
There was tsunami in Aceh in 2004 with the height reached to 30 meter. It was caused by a 9.2 magnitude earthquake on the Sunda megathrust. The tsunami destroyed most of the buildings in affected cities and claimed many fatalities. However, there were many tsunami incidents around Aceh before 2004. Aceh is located in the northern Sumatera Island of Indonesia. It is part of the Great Sunda Arc subduction zone, a convergent boundary between the Indo-Australian and Eurasian plates. Records of pre-instrumental tsunami in this region are scarce. Here we describe a tsunami in Aceh that happened in 1907. It was caused by a magnitude 7.6 earthquake on the Sunda megathrust, similar to the tsunami Aceh in 2004. Details of parameter information like the height, inundation, and the arrival times as the parameters after shaking was felt to some cities like Banda Aceh, Meulaboh and Gunung Sitoli are lacking and we want to calculate the these parameters to the cities although with the poor information. Based on the magnitude, the deformation and the possibilities of the parameter of the tsunami to the cities are calculated and modelled from Well and Coppersmith (1994) equation. After that we estimate the tsunami height, inundation and the travel time with Bayesian Markov Chain Monte Carlo and we get the result in the cities that the tsunami height is about 3 m, arrival times ranging from 20 second to 48 second and an inundation between 66 m to 127 m.
Thermal radiation effect measurement in enclosure calibration
Authors: Sindhu Tistomo Arfan , Achmadi Aditya , Suprijadi  
Published: June 2023

Abstract
The effect of thermal radiation could be the biggest issue in enclosure calibration. Reducing it by taking accurate measurements can improve the calibration uncertainty or calibration measurement capability (CMC). However, there is still less information related to the measurement procedure that can be taken from references such as DKD-R 5-7: Calibration of Climatic Chambers, DKD-R 5-8: Calibration of Hygrometers for Direct Measurement of Relative Humidity, and KAN Pd-02.04: Pedoman Kalibrasi Enklosur Suhu. Moreover, one of those reference documents suggests a value of 0.35 °C as the standard uncertainty contributed by thermal radiation for enclosure temperatures up to about 30 °C above ambient. This large value can be understood as an attempt to produce secure uncertainty since it is not measured directly. Therefore, this study describes the detailed measurement of the effect of thermal radiation. Two enclosures, which are an oven and a climatic chamber, are used as the samples. The oven represents an enclosure with natural thermal convection while the climatic chamber represents an enclosure with flowing air at a certain relative humidity. The thermal radiation effect is measured by two small PRTs class A with a diameter of 3 mm and length of 15 mm. Those PRTs are wrapped in aluminum foil to have low emissivity (ɛ=0.4) and one of them is then painted by Nextel 811-21 to have high emissivity (ɛ=0.97). The resistance outputs from the PRTs are measured by 34401A 6½ Digital Multimeter manufactured by Keysight. Before being used, those PRTs were calibrated in a stirred bath having uncertainty U=0.06 °C with a confidence level of 95 % and coverage factor k=2. The temperature range for the oven is from 60 °C to 140 °C while for the climatic chamber is from 40 %rh to 90 %rh at 20 °C and is from 40 %rh to 90 %rh at 25 °C. A mathematical model is proposed and the results are presented graphically where for the oven the higher temperature is the higher the thermal radiation effect, ranging from ±0.1 °C to ±0.4 °C. Variation of relative humidity inside the climatic chamber does not change the thermal radiation effect since the difference is 0.05 °C which is still within the uncertainty of PRTs
Development of an automatic sphygmomanometer simulator based on small volume displacement pressure generation
Authors: Ginanjar G , Ega A V , Novyanto O , Hafid  , Nurcahyono D 
Published: June 2023

Abstract
In general use of an automatic sphygmomanometer is essential to generate small and stable pressure during the rapid pressure expansion of the bladder cuff. The pressure generated by the sphygmomanometer simulator should simulate human blood pressure such as simulation for infant, neonatal and adult human or blood pressure conditions normal, hypertension, and hypotension. The simulator pressure system consists of three combinations of pressure generation, a dc motor for rough pressure generation, a small air cylinder for maintaining pressure stabilization, and brass bellows for simulation of small changes in volume or pressure. For air cylinder and brass bellows, two linear stages equipped with ball screew and the stepper motor are used to obtain a small change of linear displacement. The result for the simulator system contains these three combinations of pressure generation comply with the accuracy-test less than 3 mmHg and repeatable tests of less than 1 mmHg for automatic sphygmomanometer simulator based on ISO 81060-5:2020.
Simulating Decoherence of a Nitrogen – Vacancy Centre Spin Qubit via Ornstein – Uhlenbeck Process
Authors: Fahrurrachman Alfaiz , Majidi Muhammad A , Genov Genko T. , Said Ressa S 
Published: June 2023

Abstract
Owing to its remarkable optical properties and its ability to be controlled by microwave fields at room temperature, nitrogen-vacancy (NV) centre in diamond has been a promising platform for various nanotechnological applications, e.g. quantum sensing and magnetic resonance spectroscopy. The qubit associated with the NV centre ground state spin has been the key element for the realisation of such applications. Its coherence time determines the application performances, e.g. the sensitivity of the NV-qubit based quantum sensor. Due to unwanted and unavoidable interactions with noisy environment, the qubit undergoes decoherence that shortens its coherence time and hence reduces its application performance. Therefore, the investigation and mitigation of the decoherence of the NV qubit are of the utmost importance. Here, we simulate the qubit decoherence using Ornstein-Uhlenbeck process that is essential for designing a set of modulating control pulses to mitigate the effect.
The influence of variations carbon content on the structure of Na2MnPO4F/C cathode material
Authors: Safitri M , Zainuri M , Subhan A , Putri S S H , Putri F L V P 
Published: June 2023

Abstract
The research aims to identify structure of Na2MnPO4F/C as a sodium battery composite material has been successfully synthesized through solid state method with various carbon concetrations 0, 3, 5 and 7 wt% as conductive carbon. The source of carbon comes from citric acid (C6H8O7). The syntesized sample were characterized XRD, SEM-EDX, PSA and FTIR. X-Ray Diffraction (XRD) results show that all of samples have formed to monoclinic structure with space group P21/n and signal linked to residual carbon in not detected. The crystal size tends to decreasing with addition of carbon concentrations. The crystal size of Na2MnPO4F with 7 wt % carbon is 137,09 nm. SEM-EDX analysis shows that the higher of carbon concentration the carbon distribution tends to be more homogeneous. Base on particle size analyzers have shown that Na2MnPO4F/C particle size is getting smaller and the particle size distribution tends to be homogeneous along with the increasing of carbon concentration. Identification of the functional group with FTIR obtained Mn-O stretching, PO4 stretching, dan C-C stretching.
Spherically Symmetric Non-Topological Solitons and Boson Stars in Friedberg-Lee-Sirlin Model
Authors: Fakhri Afif Muhammad , Anang Subagyo Bintoro 
Published: June 2023

Abstract
We study spherically symmetric non-topological solitons and boson stars in Friedberg-Lee-Sirlin model in 3+1 dimensional spacetime. The non-topological soliton field configuration consists of a massless complex scalar field coupled to a real scalar field with symmetry breaking potential. The complex scalar field becomes massive when the real scalar field goes to one of the degenerate vacuums. Their existence is supported by the conserved charge and the mass-energy only on certain frequency range. When gravity is taken into account, they form configuration called boson stars. The gravitational interaction influences the quantity of the conserved charge and the mass-energy of the system. We present the dependence of symmetry breaking energy scale on the solution of boson stars.
Study comparison physical properties and minerals analysis of rock magnetic in Lawu Volcanic Complex
Authors: Legowo Budi , Irfan Nawawi Muhammad , Suryanto Wiwit , Purnama Budi 
Published: June 2023

Abstract
This study was carried out by analysis based on geological surveys, compound composition, oxide groups, mineral types and crystallite sizes, as well as magnetic properties and magnetic susceptibility values. This measurement was carried out in the Lawu Volcanic Complex (LVC) which consists of the Old LVC and the Young LVC. Based on geological survey analysis, compound composition, mineral types, magnetic properties and magnetic susceptibility values, the Lawu volcanic complex has andesite-basalt rock types. Analysis of the composition and size of the crystallites showed that the rocks of the Young LVC were more basalt than the andesite complexes of the Old LVC.
Calculating energy capacity and capacity factors of wind energy generating in the Special Region of Yogyakarta using RETScreen Expert with variations in height
Authors: Assegaf H A , Supriyanto A , Ramelan A H 
Published: June 2023

Abstract
This study aims to get simulation results for the energy capacity and capacity factor of wind turbine type Wind Energy Solutions 80 kW in the Special Region of Yogyakarta at heights of 30m, 60m, and 90m. Energy capacity and capacity factors were calculated using the RETScreen Expert software simulation, beginning with gathering monthly wind speed data from the Special Region of Yogyakarta for use in simulations with height and wind turbine variations. This study indicates that wind turbine type Wind Energy Solutions 80 kW is best suited for installation in the Special Region of Yogyakarta with annual energy capacities of 42.6 MWh, 54.1 MWh, and 63.1 MWh, for heights of 30m, 60m, and 90m, respectively. Meanwhile, the capacity factors for 30m, 60m, and 90m are 6.1%, 7.7%, and 9.0%, respectively. Based on these results, it can be concluded that the wind turbine type Wind Energy Solutions 80 kW is a viable future alternative for the planned construction of a power plant in the Special Region of Yogyakarta. With the wind speed and a power capacity that is not excessively high, it is suitable as a wind turbine type for the Special Region of Yogyakarta.
Identification of Peak Ground Acceleration and hazard potency of earthquake disaster on the mainland surface of Wangi-Wangi Island, Wakatobi Regency, Southeast Sulawesi, Indonesia
Authors: Manan A , Puspitafuri C , Pertiwi II , Chahyani R 
Published: June 2023

Abstract
This study combines microtremor data processed using the Horizontal to Vertical Spectral Ratio (HVSR) method and earthquake data. Microtremor data were obtained by filtering the waveform of ground vibration data obtained through measurements on the mainland surface of Wangi-Wangi Island in the frequency range of 0.5 to 25 Hz using a Band Pass Filter. The ground vibration data were obtained by recording signals at 47 different measurement points in a time range of 29.25 to 48.16 minutes. While the earthquake data used are sourced from 1920 to 2020. The earthquake data processed are those that meet the requirements for moment magnitude (M
w) ≥ 5.0 SR and epicenter depth (h) ≤ 45 km. The results of calculations using the Kanai’s formula show that the PGA values are in the range of 0.0463 to 0.3665g. If zoning mapping is carried out, then the hazard potency of disaster due to earthquakes based on the PGA values on the Wangi-Wangi Island area is mostly Low potential (PGA < 0.26g), only a few areas have Medium potential (0.26g ≤ PGA ≤ 0.70g), and there are no areas with High potential for earthquake threat (PGA > 0.70g).
The development of program for calculating the band gap energy of semiconductor material based on UV-Vis spectrum using delphi 7.0
Authors: Mursyalaat V. , Variani V. I. , Arsyad W. O. S. , Firihu M. Z. 
Published: June 2023

AbstractThe optical properties of semiconductor material are the important information for its application in solar cell. One of the parameter which influence the material optical properties is the band gap energy. The value of band gap energy can be obtained from experimental data of UV-Vis absorbance spectrum by doing three steps, i.e. curve smoothing, baseline arrangement data value and the calculation of the band gap energy using Tauc plot method embedded in the Origin software. Conventionally, these three processes are done sequentially. In this research, we developed the program for calculating the band gap energy which differ from the one usually used. In this program all the processes for curve smoothing, baseline arrangement data value and the calculation of the band gap energy are done simultaneously. For input data, we used the experimental UV-Vis absorbance spectrum of ZnO, TiO2 sensitized-Dye and Dye-N719 materials. The calculated band energy obtained by our program are 3.19 eV, 2.14 eV and 1.73 eV for ZnO, TiO2+Dye N719and Dye-N719 materials, respectively. These results are almost the same to the one obtained by conventional method i.e. 3.20 eV for ZnO, 2.10 eV for TiO2 based Dye-sensitized and 1.60 eV for Dye-N719. We also found that our program for calculating the band gap energy is more easily, user friendly and more efficient compared to the conventional method.