首页 > 最新文献

Komunikasi Fisika Indonesia最新文献

英文 中文
KAJIAN APLIKASI PANTULAN SINYAL GNSS UNTUK PEMANTAUAN KETINGGIAN PERMUKAAN AIR LAUT
Pub Date : 2019-10-31 DOI: 10.31258/jkfi.16.2.138-142
B. Muslim, C. Kumalasari, Novie Chiuman, M. Arafah
Design and experiment of ocean current power generation system have been carried out using the Bach In Indonesia, the tsunami early warning system only applies the earthquake and hydrosphere relationship model to predict tsunamis. To date, no tsunami detector has used radar or GNSS technology. GNSS technology can be applied as an early warning system for tsunamis, provided that tsunamis are caused by earthquakes greater than 7 magnitudes, occur 70 kilometers below sea level, and are caused by normal faults. This could be an alternative to Bouy GNSS which is expensive to install and maintain, especially for countries with vast oceans such as Indonesia. In this paper, a review of the application of GNSS signal reflection was carried out using one International GNSS Service (IGS) station, JOG2, and one Continuously Operating Reference Station (CORS), CLSA, each located in Java and Sumatra to investigate the availability of sea level monitoring in Indonesia. Determination of sea level is obtained from two methods, the GNSS signal phase data analysis method and the GNSS Signal-to-Noise Ratio (SNR) data analysis method. Both methods use reflected GNSS signals or multipath effects to obtain sea level. The results of the study show that the number of satellites that pass through Indonesia every 15 minutes is enough to get sea-level data  every 15 minutes to one hour. This shows that it is possible to apply the multipath effect to obtain sea level information in Indonesia to detect tides and tsunamis as part of the tsunami early warning system in Indonesia.
利用Bach进行了海流发电系统的设计与实验。在印度尼西亚,海啸预警系统仅采用地震-水圈关系模型来预测海啸。迄今为止,没有海啸探测器使用雷达或全球导航卫星系统技术。如果海啸是由7级以上地震引起,发生在海平面以下70公里处,由正断层引起,则GNSS技术可以作为海啸预警系统。这可能是Bouy GNSS的替代方案,后者安装和维护成本高昂,特别是对于印度尼西亚等拥有广阔海洋的国家。本文利用位于爪哇和苏门答腊的一个国际GNSS服务站(JOG2)和一个连续运行参考站(CORS)里昂证券(CLSA)对GNSS信号反射的应用进行了回顾,以调查印度尼西亚海平面监测的可用性。海平面的确定采用两种方法,GNSS信号相位数据分析法和GNSS信噪比(SNR)数据分析法。这两种方法都使用反射的GNSS信号或多径效应来获取海平面。研究结果表明,每15分钟经过印度尼西亚的卫星数量足以每15分钟到1小时获得海平面数据。这表明,作为印度尼西亚海啸预警系统的一部分,有可能应用多路径效应来获取印度尼西亚的海平面信息,以探测潮汐和海啸。
{"title":"KAJIAN APLIKASI PANTULAN SINYAL GNSS UNTUK PEMANTAUAN KETINGGIAN PERMUKAAN AIR LAUT","authors":"B. Muslim, C. Kumalasari, Novie Chiuman, M. Arafah","doi":"10.31258/jkfi.16.2.138-142","DOIUrl":"https://doi.org/10.31258/jkfi.16.2.138-142","url":null,"abstract":"Design and experiment of ocean current power generation system have been carried out using the Bach In Indonesia, the tsunami early warning system only applies the earthquake and hydrosphere relationship model to predict tsunamis. To date, no tsunami detector has used radar or GNSS technology. GNSS technology can be applied as an early warning system for tsunamis, provided that tsunamis are caused by earthquakes greater than 7 magnitudes, occur 70 kilometers below sea level, and are caused by normal faults. This could be an alternative to Bouy GNSS which is expensive to install and maintain, especially for countries with vast oceans such as Indonesia. In this paper, a review of the application of GNSS signal reflection was carried out using one International GNSS Service (IGS) station, JOG2, and one Continuously Operating Reference Station (CORS), CLSA, each located in Java and Sumatra to investigate the availability of sea level monitoring in Indonesia. Determination of sea level is obtained from two methods, the GNSS signal phase data analysis method and the GNSS Signal-to-Noise Ratio (SNR) data analysis method. Both methods use reflected GNSS signals or multipath effects to obtain sea level. The results of the study show that the number of satellites that pass through Indonesia every 15 minutes is enough to get sea-level data  every 15 minutes to one hour. This shows that it is possible to apply the multipath effect to obtain sea level information in Indonesia to detect tides and tsunamis as part of the tsunami early warning system in Indonesia.","PeriodicalId":403286,"journal":{"name":"Komunikasi Fisika Indonesia","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115867479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
PENENTUAN KOMPOSISI KIMIAWI ATMOSFER DAN TEMPERATUR EFEKTIF PADA BINTANG VEGA (α Lyr) DENGAN MENGGUNAKAN METODE SPEKTROSKOPI ABSORPSI 有效测定大气的化学成分和温度对着星星·维加(α用光谱方法ABSORPSI吕尔)
Pub Date : 2019-10-31 DOI: 10.31258/jkfi.16.2.96-102
Fitria Yuliana, Z. Zulkarnain, H. L. Malasan
The star spectrum is an information which is though to be a map of the star. The shape of the spectral line actually shows the nature of the star atmosphere, which is the only part researcher can be reached. The intensities of spectral lines will determine the chemical composition of the stars contained in the atmospheres of the stars. The approach used to determine the chemical composition and the effective temperature of the star is spectroscopy. The spectroscopy method had been done in this study using the GAO-ITB RTS telescope system which consisting of the Celestron C11 telescope, NEO-R 1000 spectrograph and CCD SBIG ST-8 camera. The object studied is Vega (α Lyr) star which has a magnitude of 0.00 that the main sequence star of the A0 spectrum class. The image data obtained then be processed using IRAF software to obtain the final spectrum graph with the y-axis representing the flux in erg cm-2s-1 and the x-axis representing the wavelength in units of Å. Furthermore, we match the absorption wavelength on the final spectrum graph to the existing wavelength of the Atomic Spectra Database (ASD) to identify the atmospheric chemical composition of the Vega star. Effective temperature can be calculated by using the Wien shifting laws by find out the maximum wavelength of the final spectrum graph. The most found element in the atmosphere of Vega star was hydrogen (H) that consist of Hε,  Hδ, Hγ, Hβ, and Hα. The value of effective temperature of the Vega star is 7136 K that has difference percentage of 22.85 % from the mean temperature of  A type star.
恒星光谱是一种信息,被认为是恒星的地图。光谱线的形状实际上显示了恒星大气的性质,这是研究人员唯一能到达的部分。光谱线的强度将决定恒星大气中包含的恒星的化学成分。测定恒星化学成分和有效温度的方法是光谱学。本研究采用由Celestron C11望远镜、NEO-R 1000光谱仪和SBIG ST-8 CCD相机组成的GAO-ITB RTS望远镜系统进行光谱分析。研究对象为织女星(α Lyr),其星等为0.00,是A0光谱类的主序星。利用IRAF软件对得到的图像数据进行处理,得到最终的光谱图,y轴表示通量,单位为erg cm-2s-1, x轴表示波长,单位为Å。此外,我们将最终光谱图上的吸收波长与原子光谱数据库(ASD)的现有波长进行匹配,以确定织女星的大气化学成分。利用维恩位移定律,求出最终光谱图的最大波长,即可计算出有效温度。织女星大气中发现最多的元素是氢(H),由Hε、Hδ、Hγ、Hβ和Hα组成。织女星的有效温度为7136 K,与A型恒星的平均温度相差22.85%。
{"title":"PENENTUAN KOMPOSISI KIMIAWI ATMOSFER DAN TEMPERATUR EFEKTIF PADA BINTANG VEGA (α Lyr) DENGAN MENGGUNAKAN METODE SPEKTROSKOPI ABSORPSI","authors":"Fitria Yuliana, Z. Zulkarnain, H. L. Malasan","doi":"10.31258/jkfi.16.2.96-102","DOIUrl":"https://doi.org/10.31258/jkfi.16.2.96-102","url":null,"abstract":"The star spectrum is an information which is though to be a map of the star. The shape of the spectral line actually shows the nature of the star atmosphere, which is the only part researcher can be reached. The intensities of spectral lines will determine the chemical composition of the stars contained in the atmospheres of the stars. The approach used to determine the chemical composition and the effective temperature of the star is spectroscopy. The spectroscopy method had been done in this study using the GAO-ITB RTS telescope system which consisting of the Celestron C11 telescope, NEO-R 1000 spectrograph and CCD SBIG ST-8 camera. The object studied is Vega (α Lyr) star which has a magnitude of 0.00 that the main sequence star of the A0 spectrum class. The image data obtained then be processed using IRAF software to obtain the final spectrum graph with the y-axis representing the flux in erg cm-2s-1 and the x-axis representing the wavelength in units of Å. Furthermore, we match the absorption wavelength on the final spectrum graph to the existing wavelength of the Atomic Spectra Database (ASD) to identify the atmospheric chemical composition of the Vega star. Effective temperature can be calculated by using the Wien shifting laws by find out the maximum wavelength of the final spectrum graph. The most found element in the atmosphere of Vega star was hydrogen (H) that consist of Hε,  Hδ, Hγ, Hβ, and Hα. The value of effective temperature of the Vega star is 7136 K that has difference percentage of 22.85 % from the mean temperature of  A type star.","PeriodicalId":403286,"journal":{"name":"Komunikasi Fisika Indonesia","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121935684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
INTERPRETASI TRANSMISIVITAS UNTUK ANALISA POTENSI AIR BAWAH TANAH BERDASARKAN DRAWDOWN AIR SUMUR CINCIN MENGGUNAKAN METODE PUMPING TEST DI KECAMATAN MARPOYAN DAMAI KOTA PEKANBARU 根据北干巴鲁镇和平马波扬地区的抽水测试方法,对地下潜在水的传输解读
Pub Date : 2019-04-30 DOI: 10.31258/jkfi.16.1.35-39
Rigia Givanny Pritamara, Juandi M, Usman Malik
The most consumption water is groundwater taken through excavated wells or ring wells. An aquifer test can be applied in  pump test in order to find transmissivity of drawdown ring wells.The tested ring wells were located at 25 different locations in the Marpoyan Damai District. In the pumping test on the ring wells data was obtained namely drawdown test data s, times t, rate of discharge Q, and then create a graph of s/Q vs Q. The straight line that cut the s/Q axis the A value with the C gradient and the determinant coefficient d2. The values obtained were then inserted into the transmisivity formula of the Cooper-Jacob method. The A values for t = 3 minutes and t = 7 minutes were selected because their results in C values are close to each other. The C values of t = 3 minutes and t = 7 minutes are 0.1671 and 0.1672 respectively. Transmissivity value obtained is 134.5 m2/day. The value shows a potentially useful groundwater aquifer for the Marpoyan Damai district because the transmissivity value exceeded 50 m2 / day.
消耗最多的水是通过挖井或环井抽取的地下水。为了确定压降环井的透光率,可以在泵试中应用含水层试验。测试的环井位于Marpoyan Damai地区的25个不同位置。在环井的泵送试验中,得到了压降试验数据s,乘以t,流量Q,然后绘制出s/Q vs Q的曲线图,s/Q轴与C梯度和决定系数d2的直线切断a值。然后将所得值代入Cooper-Jacob法的透射率公式。选择t = 3分钟和t = 7分钟的A值是因为它们在C值中的结果非常接近。t = 3分钟和t = 7分钟的C值分别为0.1671和0.1672。所得透射率值为134.5 m2/day。该值显示了马尔波扬达麦地区潜在的有用地下水含水层,因为透过率值超过50 m2 /天。
{"title":"INTERPRETASI TRANSMISIVITAS UNTUK ANALISA POTENSI AIR BAWAH TANAH BERDASARKAN DRAWDOWN AIR SUMUR CINCIN MENGGUNAKAN METODE PUMPING TEST DI KECAMATAN MARPOYAN DAMAI KOTA PEKANBARU","authors":"Rigia Givanny Pritamara, Juandi M, Usman Malik","doi":"10.31258/jkfi.16.1.35-39","DOIUrl":"https://doi.org/10.31258/jkfi.16.1.35-39","url":null,"abstract":"The most consumption water is groundwater taken through excavated wells or ring wells. An aquifer test can be applied in  pump test in order to find transmissivity of drawdown ring wells.The tested ring wells were located at 25 different locations in the Marpoyan Damai District. In the pumping test on the ring wells data was obtained namely drawdown test data s, times t, rate of discharge Q, and then create a graph of s/Q vs Q. The straight line that cut the s/Q axis the A value with the C gradient and the determinant coefficient d2. The values obtained were then inserted into the transmisivity formula of the Cooper-Jacob method. The A values for t = 3 minutes and t = 7 minutes were selected because their results in C values are close to each other. The C values of t = 3 minutes and t = 7 minutes are 0.1671 and 0.1672 respectively. Transmissivity value obtained is 134.5 m2/day. The value shows a potentially useful groundwater aquifer for the Marpoyan Damai district because the transmissivity value exceeded 50 m2 / day.","PeriodicalId":403286,"journal":{"name":"Komunikasi Fisika Indonesia","volume":"90 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126708088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ANALISA PENGARUH GAYA ELEKTROSTATIK PADA SPEKTRUM PENCITRAAN RESONANSI MAGNETIK (MRI) DALAM JARINGAN BIOLOGI
Pub Date : 2019-04-30 DOI: 10.31258/jkfi.16.1.8-11
Salomo Salomo, Novan Lestari, Muhammad Hamdi
A study of magnetic core resonance imaging modeling of biological tissue has been carried out in analyzing the effect of electrostatic forces with computational approach. This analysis aims to look at the effect of electric and magnetic force on the spectrum of breast cancer tissue. Physical parameters were determined using the modeled wave equation with the application of mathematical wolfram software 9. Computational or modeling results obtained 6 variations of the MRI spectrum showing the peak magnitude of the electric and magnetic spectrum changes by varying the resolution and distance. This is evidenced from the maximum resolution range ie the peak of the electric field spectrum at amplitude 25 a.u is at a concentration of 5 ppm. Resolution of spectrum peak medium is at concentration of 3-4 ppm whereas minimum resolution has 4 peak spectrum that is at concentration 1-2 ppm, 2-3ppm, 3-4ppm and 4ppm. the result of MRI spektrum for distance variation resulted in spectrum change, further reduced the distance then the mri spectrum in magnetic and electric field approaching spin 1.
采用计算方法分析静电力的影响,对生物组织的核磁共振成像建模进行了研究。这项分析的目的是观察电磁力对乳腺癌组织光谱的影响。利用数学wolfram软件9,利用模拟的波动方程确定了物理参数。计算或建模结果得到了6种MRI谱的变化,显示了电谱和磁谱的峰值幅度随分辨率和距离的变化而变化。这可以从最大分辨率范围得到证明,即振幅为25 a.u.的电场谱峰的浓度为5ppm。光谱峰介质的分辨率在浓度为3-4ppm时,而最低分辨率有4个峰光谱,浓度为1-2 ppm, 2-3ppm, 3-4ppm和4ppm。距离变化的MRI波谱结果导致了波谱的变化,进一步减小了磁场和电场中接近自旋1的MRI波谱的距离。
{"title":"ANALISA PENGARUH GAYA ELEKTROSTATIK PADA SPEKTRUM PENCITRAAN RESONANSI MAGNETIK (MRI) DALAM JARINGAN BIOLOGI","authors":"Salomo Salomo, Novan Lestari, Muhammad Hamdi","doi":"10.31258/jkfi.16.1.8-11","DOIUrl":"https://doi.org/10.31258/jkfi.16.1.8-11","url":null,"abstract":"A study of magnetic core resonance imaging modeling of biological tissue has been carried out in analyzing the effect of electrostatic forces with computational approach. This analysis aims to look at the effect of electric and magnetic force on the spectrum of breast cancer tissue. Physical parameters were determined using the modeled wave equation with the application of mathematical wolfram software 9. Computational or modeling results obtained 6 variations of the MRI spectrum showing the peak magnitude of the electric and magnetic spectrum changes by varying the resolution and distance. This is evidenced from the maximum resolution range ie the peak of the electric field spectrum at amplitude 25 a.u is at a concentration of 5 ppm. Resolution of spectrum peak medium is at concentration of 3-4 ppm whereas minimum resolution has 4 peak spectrum that is at concentration 1-2 ppm, 2-3ppm, 3-4ppm and 4ppm. the result of MRI spektrum for distance variation resulted in spectrum change, further reduced the distance then the mri spectrum in magnetic and electric field approaching spin 1.","PeriodicalId":403286,"journal":{"name":"Komunikasi Fisika Indonesia","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129443307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
EFEK PENAMBAHAN ATOM TEMBAGA (Cu) DAN PERAK (Ag) PADA MATERIAL AKTIF NANOMATERIAL ZnO SEL SURYA FOTOELEKTROKIMIA 铜原子(铜)和银(Ag)在活性材料纳米材料ZnO化学太阳能电池上的作用
Pub Date : 2019-04-30 DOI: 10.31258/jkfi.16.1.20-24
Windayani Windayani, Iwantono Iwantono, Awitdrus Awitdrus, Z. Zulkarnain
ZnO material coated with Cu + Ag was successfully grown using seed mediated hydrothermal method at a temperature of 90° C for 8 hours with a variation of concentration of Ag, 10 mM, and 20 mM. The growth of ZnO nanomaterials was carried out on the FTO substrate (Flourine Tin Oxide). The Samples were characterized using, Field Emission Scanning Microscope (FESEM), and X-ray Diffraction (XRD). The FESEM photos show ZnOnanorod  coated with Cu + Ag have grown on FTO having a nanoflower shape that consructed from ZnOnanorods with their orientation . The XRD pattern shows five peaks at 2θ: 31.69 °; 34.36 °; 36,18 °; 47.52 °; and 56.4 °. Based on the results of the analysis of the OriginPro 8 program each peak in a row according to the crystal orientation (100), (002), (101), (012), and (110). The stongest line was found in the crystal plane (101). DSSC was fabricated using ZnO nanomaterial coated with Cu + Ag as active material, N719 dye, liquid electrolyte, and plastisol as catalyst on the counter electrode. The results of I-V measurements at halogen lamp with ilumination its intensity of 100 mW/cm2 of the cells has producedthe highest efficiency value based on Cu coated ZnO was based DSSC 0,98% with a Cu concentration of20mM.These results show that the addition of Cu layer can increase the efficiency of DSSC based on ZnO by 123% compared to ZnO without Cu based DSSC. Addition of Ag to active material of Cu coated ZnO nanomaterial did not have a positive effect on the efficiency of DSSC cells.
采用种子介导水热法,在温度为90℃、Ag浓度为10 mM和20 mM的条件下,成功地生长了Cu + Ag包覆ZnO材料8小时。ZnO纳米材料在FTO衬底(氟锡氧化物)上生长。采用场发射扫描显微镜(FESEM)和x射线衍射仪(XRD)对样品进行了表征。FESEM照片显示,包裹Cu + Ag的zno阳极在FTO上生长,具有纳米花形状,由zno阳极与它们的取向构成。XRD谱图显示在2θ: 31.69°处有5个峰;34.36°;36岁,18°;47.52°;和56.4°。根据OriginPro 8程序的分析结果,将每个峰按晶体取向(100)、(002)、(101)、(012)、(110)排成一行。最强的线出现在晶体平面(101)。以包覆Cu + Ag的ZnO纳米材料为活性材料,N719染料、液体电解质和塑质溶胶为催化剂在对电极上制备DSSC。在卤素灯照射强度为100mw /cm2时,电池的I-V测量结果表明,Cu包覆ZnO的DSSC在Cu浓度为20mm时效率最高,为0.98%。结果表明,与不含Cu的ZnO DSSC相比,Cu层的加入可使ZnO DSSC的效率提高123%。在Cu包覆ZnO纳米材料的活性材料中添加Ag对DSSC电池的效率没有积极影响。
{"title":"EFEK PENAMBAHAN ATOM TEMBAGA (Cu) DAN PERAK (Ag) PADA MATERIAL AKTIF NANOMATERIAL ZnO SEL SURYA FOTOELEKTROKIMIA","authors":"Windayani Windayani, Iwantono Iwantono, Awitdrus Awitdrus, Z. Zulkarnain","doi":"10.31258/jkfi.16.1.20-24","DOIUrl":"https://doi.org/10.31258/jkfi.16.1.20-24","url":null,"abstract":"ZnO material coated with Cu + Ag was successfully grown using seed mediated hydrothermal method at a temperature of 90° C for 8 hours with a variation of concentration of Ag, 10 mM, and 20 mM. The growth of ZnO nanomaterials was carried out on the FTO substrate (Flourine Tin Oxide). The Samples were characterized using, Field Emission Scanning Microscope (FESEM), and X-ray Diffraction (XRD). The FESEM photos show ZnOnanorod  coated with Cu + Ag have grown on FTO having a nanoflower shape that consructed from ZnOnanorods with their orientation . The XRD pattern shows five peaks at 2θ: 31.69 °; 34.36 °; 36,18 °; 47.52 °; and 56.4 °. Based on the results of the analysis of the OriginPro 8 program each peak in a row according to the crystal orientation (100), (002), (101), (012), and (110). The stongest line was found in the crystal plane (101). DSSC was fabricated using ZnO nanomaterial coated with Cu + Ag as active material, N719 dye, liquid electrolyte, and plastisol as catalyst on the counter electrode. The results of I-V measurements at halogen lamp with ilumination its intensity of 100 mW/cm2 of the cells has producedthe highest efficiency value based on Cu coated ZnO was based DSSC 0,98% with a Cu concentration of20mM.These results show that the addition of Cu layer can increase the efficiency of DSSC based on ZnO by 123% compared to ZnO without Cu based DSSC. Addition of Ag to active material of Cu coated ZnO nanomaterial did not have a positive effect on the efficiency of DSSC cells.","PeriodicalId":403286,"journal":{"name":"Komunikasi Fisika Indonesia","volume":"334 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122642927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
PENENTUAN DENSITAS PLASMA HIDROGEN NONTERMAL PADA TEKANAN RENDAH 测定低压力的非热等离子体密度
Pub Date : 2019-04-30 DOI: 10.31258/jkfi.16.1.29-34
Nelda Ipkawati, Saktioto Saktioto
Before producing hydrogen plasma low pressure in experiment, it is necessary to know the density equilibrium process through a simulation. Hydrogen species densities of non-thermal plasma at low pressure is simulated using chemical kinetik model by Runge Kutta method. This simulation carried out to determine the equilibrium process of densities and reaction rates of hydrogen species in achieving equilibrium conditions. The equation used time-dependent continuity equation and Arrhenius form. The hydrogen species consist of electrons, H, H2, H+ and H2+. The results of show that electron density, H, H2, H+ and H2+ are respectively 1020,23m-3, 1019,69m-3, 1019,91m-3, 1019,39m-3 and 1018,43m-3 during of 23-24 ns. These describe that the density of each species of hydrogen very fast to achieve equilibrium conditions, while the value of the reaction rate obtained can be concluded that the value of the largest reaction rate is the impact ionization process with a value of 9.86x1052m-3 s-1and the smallest one is dissociation process with a value of 1.22x10-5m-3 s-1.
在实验中产生氢等离子体低压之前,有必要通过模拟来了解密度平衡过程。采用Runge - Kutta方法,利用化学动力学模型模拟了低压下非热等离子体的氢种密度。为了确定在达到平衡条件下氢的密度和反应速率的平衡过程,进行了模拟。方程采用时变连续性方程和阿伦尼乌斯形式。氢由电子、H、H2、H+和H2+组成。结果表明:在23 ~ 24 ns内,H、H2、H+和H2+的电子密度分别为1020、23m-3、1019、69m-3、1019、91m-3、1019、39m-3和1018、43m-3。这些描述了每种氢的密度很快达到平衡条件,而得到的反应速率值可以得出,最大的反应速率值为冲击电离过程,其值为9.86 × 1052m-3 s-1,最小的反应速率值为解离过程,其值为1.22 × 10-5m-3 s-1。
{"title":"PENENTUAN DENSITAS PLASMA HIDROGEN NONTERMAL PADA TEKANAN RENDAH","authors":"Nelda Ipkawati, Saktioto Saktioto","doi":"10.31258/jkfi.16.1.29-34","DOIUrl":"https://doi.org/10.31258/jkfi.16.1.29-34","url":null,"abstract":"Before producing hydrogen plasma low pressure in experiment, it is necessary to know the density equilibrium process through a simulation. Hydrogen species densities of non-thermal plasma at low pressure is simulated using chemical kinetik model by Runge Kutta method. This simulation carried out to determine the equilibrium process of densities and reaction rates of hydrogen species in achieving equilibrium conditions. The equation used time-dependent continuity equation and Arrhenius form. The hydrogen species consist of electrons, H, H2, H+ and H2+. The results of show that electron density, H, H2, H+ and H2+ are respectively 1020,23m-3, 1019,69m-3, 1019,91m-3, 1019,39m-3 and 1018,43m-3 during of 23-24 ns. These describe that the density of each species of hydrogen very fast to achieve equilibrium conditions, while the value of the reaction rate obtained can be concluded that the value of the largest reaction rate is the impact ionization process with a value of 9.86x1052m-3 s-1and the smallest one is dissociation process with a value of 1.22x10-5m-3 s-1.","PeriodicalId":403286,"journal":{"name":"Komunikasi Fisika Indonesia","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125199744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
VISUALISASI KONTRAS SPEKEL MENGGUNAKAN PROGRAM SCIKIT IMAGE DAN PULSA DETAK JANTUNG BERBASIS ARDUINO UNO PADA TIKUS PUTIH YANG DIINDUKSIKAN ALOKSAN 对斑点的可视化对比使用了基于ARDUINO UNO的SCIKIT显像程序和基于ARDUINO UNO的心律脉冲进行进行脑电图处理
Pub Date : 2019-04-30 DOI: 10.31258/jkfi.16.1.52-58
Z. Zulkarnain, N. Melati
Speckle contrast visualization and heart rate pulses on rats induced with alloxan were successfully carried out. This research aims to visualize speckle contrast measurements using the Scikitimage program and analyze the relationship between speckle contraston rats to blood sugar levels and also to determine the effect of alloxan induced on heart rate frequency in rats. This study obtained speckle pattern image data from rats induced by alloxan with variations in concentrations of 35%, 55% and without alloxan for 12 days of treatment. The sample used were3 to 5 months old. The method conducted in speckle contrast visualization was using blob detection with Laplacian of Gaussian algorithm to obtain speckle contrast values while the visualization of heart rate pulse based on Arduino Uno was done using the Integrated Development Environment (IDE) program. The results obtained from image processing using the Scikitimage program show that the contrast value could achieved decreasing with increasing blood sugar levels and the results obtained for detection of heart rate was the greater the blood sugar level the greater the heart rate (beat per minute) measured.  
成功地对四氧嘧啶诱导的大鼠进行了斑点造影显示和心率脉冲。本研究旨在利用Scikitimage程序可视化斑点对比测量,分析斑点对比大鼠与血糖水平的关系,并确定四氧嘧啶诱导对大鼠心率频率的影响。本研究获得了浓度为35%、55%和不含四氧嘧啶治疗12天的四氧嘧啶诱导大鼠斑纹图像数据。使用的样本是3到5个月大的。散斑对比度可视化的方法是使用拉普拉斯高斯算法的斑点检测来获得散斑对比度值,而基于Arduino Uno的心率脉冲可视化是使用集成开发环境(IDE)程序来实现的。利用Scikitimage程序进行图像处理的结果表明,对比度值可以随着血糖水平的升高而降低,并且检测心率的结果是血糖水平越高,测量的心率(每分钟心跳数)越大。
{"title":"VISUALISASI KONTRAS SPEKEL MENGGUNAKAN PROGRAM SCIKIT IMAGE DAN PULSA DETAK JANTUNG BERBASIS ARDUINO UNO PADA TIKUS PUTIH YANG DIINDUKSIKAN ALOKSAN","authors":"Z. Zulkarnain, N. Melati","doi":"10.31258/jkfi.16.1.52-58","DOIUrl":"https://doi.org/10.31258/jkfi.16.1.52-58","url":null,"abstract":"Speckle contrast visualization and heart rate pulses on rats induced with alloxan were successfully carried out. This research aims to visualize speckle contrast measurements using the Scikitimage program and analyze the relationship between speckle contraston rats to blood sugar levels and also to determine the effect of alloxan induced on heart rate frequency in rats. This study obtained speckle pattern image data from rats induced by alloxan with variations in concentrations of 35%, 55% and without alloxan for 12 days of treatment. The sample used were3 to 5 months old. The method conducted in speckle contrast visualization was using blob detection with Laplacian of Gaussian algorithm to obtain speckle contrast values while the visualization of heart rate pulse based on Arduino Uno was done using the Integrated Development Environment (IDE) program. The results obtained from image processing using the Scikitimage program show that the contrast value could achieved decreasing with increasing blood sugar levels and the results obtained for detection of heart rate was the greater the blood sugar level the greater the heart rate (beat per minute) measured.  ","PeriodicalId":403286,"journal":{"name":"Komunikasi Fisika Indonesia","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129705418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
INTERPRETASI KONDISIAIR BAWAH TANAH STUDI KASUS DI KECAMATAN TENAYAN RAYA KOTA PEKANBARU DENGAN MENGGUNAKAN METODE PUMPING TEST 用抽水测试方法对北干鲁镇地下水条件研究的解释
Pub Date : 2019-04-30 DOI: 10.31258/jkfi.16.1.25-28
Awaludin Rakhmat, Juandi Muhammad, Usman Malik
The purpose of the research on the potential of underground water in ring wells in the District of Tenayan Raya Pekanbaru City using the experimental method of pumping test is to determine the potential of underground water, and determine the value of transmissivity so that it can be known the feasibility of well water for surrounding communities. Data was taken on 30 ring wells in Tenayan Raya District, Pekanbaru City. The results obtained are wells that have the lowest potential for underground water in Kadiran Street, Kulim Village with a value of drawdown is 2.1610 m. Wherea the highest potential as good underground water is in the well at Gunung Kidul Street, Tangkerang Timur Village with value of drawdown is 2.0407 m. This ring well has the potential of underground water which is likely to provide water for a long time. The transmissivity obtained from the 30 ring wells is 10.7684 m2 / day. This value shows good groundwater quality and has the potential to meet the needs of residential areas.
采用抽水试验的实验方法对特纳延拉雅北干巴鲁市地区环井地下水潜力进行研究,目的是确定地下水潜力,并确定透过率值,从而了解井水对周边社区的可行性。数据取自北坎巴鲁市Tenayan Raya区的30口环井。结果表明,库林村Kadiran街的地下水潜力最低,其落差值为2.1610 m。其中,良好地下水潜力最大的是位于Tangkerang Timur村Gunung Kidul Street的井,其落差值为2.0407 m。这口环井有潜在的地下水,很可能长期提供水。30口环井的透过率为10.7684 m2 /天。这一数值表明地下水水质良好,有可能满足居民区的需要。
{"title":"INTERPRETASI KONDISIAIR BAWAH TANAH STUDI KASUS DI KECAMATAN TENAYAN RAYA KOTA PEKANBARU DENGAN MENGGUNAKAN METODE PUMPING TEST","authors":"Awaludin Rakhmat, Juandi Muhammad, Usman Malik","doi":"10.31258/jkfi.16.1.25-28","DOIUrl":"https://doi.org/10.31258/jkfi.16.1.25-28","url":null,"abstract":"The purpose of the research on the potential of underground water in ring wells in the District of Tenayan Raya Pekanbaru City using the experimental method of pumping test is to determine the potential of underground water, and determine the value of transmissivity so that it can be known the feasibility of well water for surrounding communities. Data was taken on 30 ring wells in Tenayan Raya District, Pekanbaru City. The results obtained are wells that have the lowest potential for underground water in Kadiran Street, Kulim Village with a value of drawdown is 2.1610 m. Wherea the highest potential as good underground water is in the well at Gunung Kidul Street, Tangkerang Timur Village with value of drawdown is 2.0407 m. This ring well has the potential of underground water which is likely to provide water for a long time. The transmissivity obtained from the 30 ring wells is 10.7684 m2 / day. This value shows good groundwater quality and has the potential to meet the needs of residential areas.","PeriodicalId":403286,"journal":{"name":"Komunikasi Fisika Indonesia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129067688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ANALISA INTERPRETASI POLA ALIRAN AIR BAWAH TANAH KELURAHAN LABUH BARU BARAT KECAMATAN PAYUNG SEKAKI PEKANBARU MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER
Pub Date : 2019-04-30 DOI: 10.31258/jkfi.16.1.1-7
Krisman Krisman, Citra Siti Fatimah Julianti, M Juandi
Underground water is one of the important component sources for human being. Study on interpretation of underground water flow has been carried out using Geoelectric Schlumberger Electrode Configuration in Labuh Baru Barat Village, Payung Sekaki District, Pekanbaru. The range measurement was chosen to be 240 meter. The output of measurement  arecurrent and voltage. The data, then was inputed into software progress and surfer 11. The output of this computer program is a map of underground waterflow  pettern and underground lithology. The results of mapping of the pattern of underground water flow indicate that the direction of water flow from North to South direction, or from Pinang street to Payung Sekaki street. The thickness of the layer start  from the first layer that is 4.05 meters and 5.4 meters is a layer of silt- clay, the second layer is 13.07 meters and 14.3 meters is a layer of mud stone, the third layer is 13.07 meters and 15.2 meters is a layer of sand and alluvial and the fourth layer is 51.1 meters and 79.2 meters is layer of gravel sand.
地下水是人类赖以生存的重要水源之一。在Pekanbaru Payung Sekaki地区的Labuh Baru Barat村,使用斯伦贝谢地电电极配置进行了地下水流解释研究。测量距离选择240米。测量输出频率和电压。这些数据,然后被输入到软件进度和冲浪者11。该计算机程序输出的是地下水流形态和地下岩性图。地下水流格局的制图结果表明,水流方向由北向南方向,或由槟榔街向Payung Sekaki街流动。层的厚度从第一层开始,分别为4.05米和5.4米为粉砂-粘土层,第二层为13.07米和14.3米为泥石层,第三层为13.07米和15.2米为沙和冲积层,第四层为51.1米和79.2米为砾石砂层。
{"title":"ANALISA INTERPRETASI POLA ALIRAN AIR BAWAH TANAH KELURAHAN LABUH BARU BARAT KECAMATAN PAYUNG SEKAKI PEKANBARU MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER","authors":"Krisman Krisman, Citra Siti Fatimah Julianti, M Juandi","doi":"10.31258/jkfi.16.1.1-7","DOIUrl":"https://doi.org/10.31258/jkfi.16.1.1-7","url":null,"abstract":"Underground water is one of the important component sources for human being. Study on interpretation of underground water flow has been carried out using Geoelectric Schlumberger Electrode Configuration in Labuh Baru Barat Village, Payung Sekaki District, Pekanbaru. The range measurement was chosen to be 240 meter. The output of measurement  arecurrent and voltage. The data, then was inputed into software progress and surfer 11. The output of this computer program is a map of underground waterflow  pettern and underground lithology. The results of mapping of the pattern of underground water flow indicate that the direction of water flow from North to South direction, or from Pinang street to Payung Sekaki street. The thickness of the layer start  from the first layer that is 4.05 meters and 5.4 meters is a layer of silt- clay, the second layer is 13.07 meters and 14.3 meters is a layer of mud stone, the third layer is 13.07 meters and 15.2 meters is a layer of sand and alluvial and the fourth layer is 51.1 meters and 79.2 meters is layer of gravel sand.","PeriodicalId":403286,"journal":{"name":"Komunikasi Fisika Indonesia","volume":"Suppl 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126288269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
PEMETAAN AIR TANAH PADA LAHAN KERING DI RT 05 DESA MUARO PIJOAN MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI WENNER MUARO PIJOAN村庄MUARO PIJOAN采用了WENNER的ge对排水量方法
Pub Date : 2019-04-30 DOI: 10.31258/jkfi.16.1.40-45
Eka Nurshafni, Faizar Farid, Samsidar Samsidar, Linda Handayani
The Study has been done using the geoelectric wenner configuration method in Muaro Pijoan Village, District of Jambi Luar Kota, Muaro Jambi Regency. The purpose of this study were to map the resistivity and determine the ground water position in Muaro Pijoan Village. The study area is divided into 5 tracks, 2 tracks along 100 meters and 3 tracks along 200 meters. Tracks with length 100 meters has space 5 meters and the track with length 200 meters has space of 10 meters. The value obtained from the measurement is the current and potential values, the value is used to obtain the apparent resistivity. The apparent resistivity value is then inverted using Res2Dinv software into 2 dimensional form. The inversion results in 3 cross-sectional resistivity imaged with color and each color indicates a sunder ground resistivity value. Based on the rock resistivity table, ground water has a resistivity value between 30-100 Ω.m. From the cross-sectional resistivity it is found that all tracks have a potential ground water content and the location varies from 2.5 to 34.6 meters below the soil surface. The largest groundwater potential is on track 3 and the smallest is on track 5. Based on its groundwater position in Muaro Pijoan Village includes shallow groundwater. 
该研究是在Muaro Jambi县Jambi Luar Kota区Muaro Pijoan村使用地电wenner配置方法完成的。本研究的目的是绘制Muaro Pijoan村的电阻率图并确定地下水位置。研究区域分为5条轨道,沿100米2条轨道,沿200米3条轨道。长度为100米的轨道间距为5米,长度为200米的轨道间距为10米。测量得到的值是电流和电势的值,该值用于得到视电阻率。然后利用Res2Dinv软件将视电阻率值反演为二维形式。反演结果为3个带颜色的截面电阻率成像,每个颜色表示一个地下电阻率值。根据岩石电阻率表,地下水的电阻率值在30-100 Ω.m之间。通过电阻率分析发现,所有轨道都有潜在的地下水含量,其位置在土壤表面以下2.5 ~ 34.6 m不等。地下水潜力最大的是3号轨道,最小的是5号轨道。根据其地下水位置,Muaro Pijoan村包括浅层地下水。
{"title":"PEMETAAN AIR TANAH PADA LAHAN KERING DI RT 05 DESA MUARO PIJOAN MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI WENNER","authors":"Eka Nurshafni, Faizar Farid, Samsidar Samsidar, Linda Handayani","doi":"10.31258/jkfi.16.1.40-45","DOIUrl":"https://doi.org/10.31258/jkfi.16.1.40-45","url":null,"abstract":"The Study has been done using the geoelectric wenner configuration method in Muaro Pijoan Village, District of Jambi Luar Kota, Muaro Jambi Regency. The purpose of this study were to map the resistivity and determine the ground water position in Muaro Pijoan Village. The study area is divided into 5 tracks, 2 tracks along 100 meters and 3 tracks along 200 meters. Tracks with length 100 meters has space 5 meters and the track with length 200 meters has space of 10 meters. The value obtained from the measurement is the current and potential values, the value is used to obtain the apparent resistivity. The apparent resistivity value is then inverted using Res2Dinv software into 2 dimensional form. The inversion results in 3 cross-sectional resistivity imaged with color and each color indicates a sunder ground resistivity value. Based on the rock resistivity table, ground water has a resistivity value between 30-100 Ω.m. From the cross-sectional resistivity it is found that all tracks have a potential ground water content and the location varies from 2.5 to 34.6 meters below the soil surface. The largest groundwater potential is on track 3 and the smallest is on track 5. Based on its groundwater position in Muaro Pijoan Village includes shallow groundwater. ","PeriodicalId":403286,"journal":{"name":"Komunikasi Fisika Indonesia","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117254911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
期刊
Komunikasi Fisika Indonesia
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1