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Akademika ◽  
2021 ◽  
Vol 10 (02) ◽  
pp. 335-348
Author(s):  
Masduki Ahmad

This study aims to determine whether or not there is a correlation between empowerment and motivation with teacher commitment at SDN Duren Sawit, East Jakarta. This study decides the three variables used, namely empowerment (X1), motivation (X2), and teacher commitment (Y). This study uses quantitative research using a survey method using a correlational approach. The subjects of this study were teachers from 8 public elementary schools located in the Duren Palm Village, East Jakarta, with a total population of 140 teachers. Sampling was carried out using Simple Random Sampling with the formula Slovin at a significance level of an error level of 5% so that it obtained 104 sample members. Carried out this research from January 2021 to July 2021. Testing the hypothesis was carried out using a multiple linear Unified regression model using a coefficient of determination (R Square) of 0.664 or 66.4%. From the results that have been carried out when testing the hypothesis, it is known that the results of this study have a relationship between empowerment and motivation with teacher commitment at SD Negeri Duren Sawit, East Jakarta.


2021 ◽  
Vol 13 (23) ◽  
pp. 4866
Author(s):  
Keita Matsuzawa ◽  
Yohei Kinoshita

Interferometric synthetic aperture radar (InSAR) enables us to obtain precipitable water vapor (PWV) maps with high spatial resolution through the phase difference caused by refraction in the atmosphere. Although previous studies have evaluated the error level of InSARPWV observations, they validated it only with C-band InSARPWV observations. Since ionospheric disturbance seriously contaminates the InSAR phase in the case of the lower-frequency SAR system, it is necessary for a PWV error level evaluation correcting the ionospheric effect appropriately if we use lower-frequency SAR systems, such as the Advanced Land Observing Satellite-2 (ALOS-2). In this paper, we evaluated the error level of the L-band InSARPWV observation obtained from ALOS-2 data covering four areas in Japan. We compared the InSAR observations with global navigation satellite system (GNSS) atmospheric observations and estimated the L-band InSARPWV error value by utilizing the error propagation theory. As a result, the L-band InSARPWV absolute error reached 2.83 mm, which was comparable to traditional PWV observations. Moreover, we investigated the impacts of the seasonality, the interferometric coherence, and the height dependence on the PWV observation accuracy in InSAR.


2021 ◽  
Vol 14 (10) ◽  
pp. 6561-6599
Author(s):  
Liviu Ivănescu ◽  
Konstantin Baibakov ◽  
Norman T. O'Neill ◽  
Jean-Pierre Blanchet ◽  
Karl-Heinz Schulz

Abstract. Starphotometry, the night-time counterpart of sunphotometry, has not yet achieved the commonly sought observational error level of 1 %: a spectral optical depth (OD) error level of 0.01. In order to address this issue, we investigate a large variety of systematic (absolute) uncertainty sources. The bright-star catalogue of extraterrestrial references is noted as a major source of errors with an attendant recommendation that its accuracy, particularly its spectral photometric variability, be significantly improved. The small field of view (FOV) employed in starphotometry ensures that it, unlike sun- or moonphotometry, is only weakly dependent on the intrinsic and artificial OD reduction induced by scattering into the FOV by optically thin clouds. A FOV of 45 arcsec (arcseconds) was found to be the best trade-off for minimizing such forward-scattering errors concurrently with flux loss through vignetting. The importance of monitoring the sky background and using interpolation techniques to avoid spikes and to compensate for measurement delay was underscored. A set of 20 channels was identified to mitigate contamination errors associated with stellar and terrestrial atmospheric gas absorptions, as well as aurora and airglow emissions. We also note that observations made with starphotometers similar to our High Arctic instrument should be made at high angular elevations (i.e. at air masses less than 5). We noted the significant effects of snow crystal deposition on the starphotometer optics, how pseudo OD increases associated with this type of contamination could be detected, and how proactive techniques could be employed to avoid their occurrence in the first place. If all of these recommendations are followed, one may aspire to achieve component errors that are well below 0.01: in the process, one may attain a total 0.01 OD target error.


Author(s):  
Wina Permana Sari ◽  
Hisyam Fahmi

Digital image modification or image forgery is easy to do today. The authenticity verification of an image become important to protect the image integrity so that the image is not being misused. Error Level Analysis (ELA) can be used to detect the modification in image by lowering the quality of image and comparing the error level. The use of deep learning approach is a state-of-the-art in solving cases of image data classification. This study wants to know the effect of adding ELA extraction process in the image forgery detection using deep learning approach. The Convolutional Neural Network (CNN), which is a deep learning method, is used as a method to do the image forgery detection. The impacts of applying different ELA compression levels, such as 10, 50, and 90 percent, were also compared in this study. According to the results, adopting the ELA feature increases validation accuracy by about 2.7% and give the better test accuracy. However, the use of ELA will slow down the processing time by about 5.6%.


2021 ◽  
Vol 3 (4) ◽  
pp. 522
Author(s):  
Priehadi Dhasa Eka
Keyword(s):  

Penelitian ini bertujuan untuk mengetahui bagaimana pengaruh motivasi dan disiplin kerja terhadap kinerja karyawan PT. Mega Finance Kantor Pusat Jakarta Selatan. Metode yang digunakan dalam metode ini adalah pendekatan kuantitatif, pengambilan sampel    menggunakan teknik slovin dengan error level sebesar 0,10 dengan begitu didapat 68 responden, Hasil  penelitian  secara parsial menunjukkan  bahwa motivasi berpengaruh positif dan signifikan terhadap kinerja karyawan PT. Mega Finance Kantor Pusat Jakarta Selatan dengan nilai thitung > ttabel atau (2,625 > 1,997) dan disiplin kerja juga berpengaruh positif dan signifikan terhadap kinerja karyawan PT. Mega Finance Kantor Pusat Jakarta Selatan dengan nilai thitung > ttabel atau (12,483 > 1,997). Motivasi  dan  disiplin  kerja  secara  simultan  berpengaruh  signifikan  terhadap kinerja  karyawan PT. Mega Finance Kantor Pusat Jakarta Selatan dengan nilai Fhitung > Ftabel atau (84,769 > 3,14).Kata Kunci: Motivasi, Disiplin Kerja, Kinerja Karyawan


Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Guizhen Feng ◽  
Jian Ding ◽  
Jinde Cao ◽  
Qingqing Cao

This study investigates the bipartite synchronization of heterogeneous signed networks with distributed impulsive control. Leader-follower bipartite synchronization within a nonzero error bound is analyzed when the average impulsive interval is T a < ∞ or T a = ∞ . Some sufficient conditions to achieve the bipartite quasi-synchronization are presented, and the synchronization error level is estimated by the specific mathematical expression. The correctness of the theoretical results is verified by numerical examples.


2021 ◽  
Vol 10 (1) ◽  
pp. 77-83
Author(s):  
Rini Indrati ◽  
Siti Daryati ◽  
Dewi Kartikasari ◽  
Sri Mulyati ◽  
Marichatul Jannah

The projections for the sacrum are axial anteroposterior with the beam 15 degrees toward the cephalad, and axial posteroanterior in the direction of the beam 15 degrees caudally. Some practitioners take steps to examine the sacrum with AP projections in a perpendicular beam direction. Around the sacrum are reproductive organs that are sensitive to radiation, so it is necessary to select the right projection to reduce the radiation dose and show clear anatomical information. This study aims to determine the projection of an examination that produces clear anatomical information at a minimal dose. This is an experimental study with one shot post-test only. Samples in the form of radiographs were obtained from perpendicular AP and axial AP projections assessed by radiologists regarding the clarity of anatomical information. The radiation dose was measured using TLD on the ovaries and gonads. Data were analyzed by t-test and Wilcoxon test with an error level of 5%. The AP axial projection shows better anatomical information than the perpendicular AP projection. The axial AP projection shows a smaller dose of the ovaries and gonads. There is a difference in anatomical information between AP and axial AP projections with a p-value = 0.017. There was a difference in radiation dose between AP and axial AP projections on the right ovary (p-value = 0.002), left ovary (p-value 0.001) and gonads (p-value = 0.008).


2021 ◽  
Vol 10 (2) ◽  
pp. 180-188
Author(s):  
Sarwar A. Hamad ◽  
Kawa S. Mohamed Ali

Two non-parametric statistical methods are studied in this work. These are the nearest neighbor regression and the Nadaraya Watson kernel smoothing technique. We have proven that under a precise circumstance, the nearest neighborhood estimator and the Nadaraya Watson smoothing produce a smoothed data with a same error level, which means they have the same performance. Another result of the paper is that nearest neighborhood estimator performs better locally, but it graphically shows a weakness point when a large data set is considered on a global scale.


2021 ◽  
Vol 4 (2) ◽  
pp. 635-644
Author(s):  
Bambang Supriadi ◽  
Abdul Yusuf

This study aims to acknowledge any relationship between Website Quality and E - Website user satisfaction with E-Loyalty of website users. In this study the authors used quantitative research methods. The independent variable is the variable that affects or causes the change or the dependent variable arises. In this research, the independent variables are Website Quality and E - Satisfaction. The dependent variable on the variable which is the result of the effect, because the independent variable. The dependent variable in this research is E - Loyalty. The population in this study is online ticket buyers throughout Indonesia through the PSSI.org website, which is unlimited. The population is users of the PSSI Web Site throughout Indonesia. The sampling technique used in this study is a random sampling technique by presenting a total of 10-15% based on the population of buyers or users of the PSSI.org Web site throughout Indonesia which is provided unlimited, it is known The number of samples using the Jacob Cohen formula using an error level of 10% was obtained as many as 204 respondents. The results of the research obtained by the authors also partially Website Quality and E - Satisfaction has a significant effect on E - Loyalty on the PSSI.org Website, E - Satisfaction with E - Loyalty has a proportion value of 8.2%, Website quality has a higher effect on E - Loyalty on the PSSI.org Site with a proportion of 10.2%. Effect of Website Quality and E - Website user satisfaction on E - Website user loyalty simultaneously with an effect of 35.8%, while the remaining 64.2% is by other variables not examined in this study Keywords: Website Quality , E – Satisfaction , E – Loyalty


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