Simulation of solar radiation brightness fields in the presence of optically anisotropic crystal clouds: algorithm and test results

2020 ◽  
Keyword(s):  
Solar Radiation ◽  
Test Results ◽  
Anisotropic Crystal

scholarly journals Spatial-Temporal Analysis of Solar Radiation Exposure and COVID-19 Cases in Jakarta 2020

2021 ◽  
Author(s):  
Yoerdy Agusmal Saputra ◽  
Dewi Susanna
Keyword(s):  
Solar Radiation ◽  
Radiation Exposure ◽  
Temporal Analysis ◽  
Risk Level ◽  
Ecological Design ◽  
Test Results ◽  
Control Programs ◽  
Solar Radiation Exposure ◽  
And Control ◽  
Positive Pattern

To date, coronavirus disease 2019 (COVID-19) is still a threat to public health systems around the world. As of July 25, 2021, the numbers were still increasing in most countries, and the total confirmed cases reached 194,582,750 with 4,171,672 deaths (CFR 2.1%). In Indonesia, 3,166,505 cases were reported with 83,279 deaths (CFR 2.7%) in all provinces and dominated by cases from Jakarta. Therefore, this study aimed to find a correlation and the duration of solar radiation exposure spatially on the pattern of COVID-19 cases. An ecological design was used based on time and place with the integration of geographic information systems and statistical techniques. The correlation test results between solar radiation exposure and COVID-19 cases in Jakarta showed a significant relationship (p = 0.000) with a strong closeness and positive pattern (r = 0.666). Furthermore, the spatial map overlaying solar radiation exposure and COVID-19 cases showed urban villages with high radiation tend to increase in cases earlier than areas with moderate and low. The differences in geographical and temporal conditions are a concern for the Provincial Health Office. This can be a consideration in strengthening more specific prevention and control programs according to the risk level and characteristics of each region.

Intensity of reflected solar radiation in the presence of optically anisotropic crystal clouds: results of preliminary calculations

2021 ◽  
Author(s):  
Tatiana B. Zhuravleva ◽  
Ilmir M. Nasrtdinov ◽  
Anastasia V. Artyushina ◽  
Dmitrii N. Timofeev ◽  
Victor A. Shishko ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Anisotropic Crystal

The Experimental Study of Floor Heating for Solar House

2014 ◽  
Vol 548-549 ◽  
pp. 626-630
Author(s):  
Yu Feng Jing ◽  
Guo Zhong Ding ◽  
Jia Jiang Miao ◽  
Chang Kai Ou ◽  
Jun Yi Tan
Keyword(s):  
Solar Radiation ◽  
Peak Load ◽  
Heating System ◽  
Hot Water ◽  
Average Intensity ◽  
Test Results ◽  
Average Temperature ◽  
Heat Collector ◽  
Solar House ◽  
Floor Heating

Constructing a solar house with a solar vacuum tube heat collector to produce hot water , and using hot water to drive the low-temperature floor heating system for heating. The test results indicate that the indoor average temperature (IAT) would be 7.62°C under the condition of no solar radiation and the outdoor average temperature (OAT) at 2.17°C, ,and then it carried on the heating compensation system, the IAT reaches to 16.35°C when setting the heating water flow is 0.1m/s ,inlet water temperature is 45°C,at 5°Ctemperature difference; When the average intensity of solar radiation is 62W/m2 and OAT is 5.15°C, the IAT is 12.74°C, at the same heating conditions , the IAT reaches 19.74°C by floor heating, and it can control the indoor temperature in a comfortable area ,so the floor heating system has a clear effect on the peak load shifting of house heating.

scholarly journals Analisa Perbandingan Performansi AC SPLIT Konvensional Dengan AC SPLIT Tenaga Surya

2021 ◽  
Vol 14 (1) ◽  
pp. 6-10
Author(s):  
Yudhy Kurniawan
Keyword(s):  
Solar Radiation ◽  
Research Method ◽  
Fossil Fuels ◽  
Electrical Power ◽  
Test Results ◽  
Pv System ◽  
Tropical Country ◽  
Pv Cell ◽  
Ac Current ◽  
Solar Powered

Currently, the world's energi needs are still dominated by depleting fossil fuels, where the largest consumption produced from these fossils is electrical energi. For tropical country conditions, on average, every house and in city buildings use split AC as a tool to condition the room so that it feels comfortable for its residents. Where about 60% utilize electrical energi. In this study, split AC uses solar power as an alternative to electrical energi by using a solar photovoltage (PV) system as a medium for absorbing solar radiation to be converted into electrical energi in split AC. The goal is that the use of solar radiation is able to reduce the use of electricity from PLN, which so far requires a large amount of money. The research method begins by making a model of a device that is modified by an electric panel on a split AC connected to an inverter to convert DC to AC current from the PV cell. From the use of solar cells as electrical energi then the test results are compared with conventional split AC. The results obtained from the conventional split AC test can be seen that the efficiency is 85% while the solar-powered split AC has an efficiency of 73%, but for the use of electrical power that operates for 2 hours on a solar-powered split AC, it is more efficient with a power of 376 Wh per day.

scholarly journals SISTEM PERHITUNGAN LAMA PENYINARAN MATAHARI DENGAN METODE OTSU THRESHOLD (STUDI KASUS: ST. KLIMATOLOGI BARONGAN)

Compiler ◽  
2016 ◽  
Vol 5 (2) ◽  
Author(s):  
Asih Pujiastuti ◽  
Agus Harjoko
Keyword(s):  
Solar Radiation ◽  
Measurement Data ◽  
Test Results ◽  
Radiation Data ◽  
Otsu Method ◽  
Record Card ◽  
Approach Method ◽  
Accuracy Of Measurement ◽  
The Right ◽  
Data Reading

Solar radiation measurements in climatology station barongan done by using campbell stokes and record card. Solar radiation is the accumulation of the whole length of the object radiation recorded on the record card. Solar radiation data reading performed by observers by estimating the long of object irradiation compared with the scale of hours listed on the record card. The difficulties encountered by observers in conducting solar radiation data readout is the shape of the object radiation recorded on the record card are not always in the form of elongated areas, some areas disjointed, even can only form small holes along the track on the card record. The purpose of this study was to design and build a system that can be used to calculate solar radiation recorded on the card record, thus increasing the accuracy of measurement data readout. Cropping process is carried out in order to obtain the right area for analysis. The approach method in object segmentation is done by implementing a solar radiation threshold otsu method. The test results showed that the determination o f the radius o f the opening and removing noise value appropriately irradiation can obtain the number o f objects on test images with RMSEof1.4429 compared with the amount o f exposure o f the image o f the original object. Results o f calculation solar radiation by the system showed system RMSE o f 0,51 to observer calculation.

Texture measurements in Al2O3 using BEKP

1994 ◽  
Vol 52 ◽  
pp. 608-609
Author(s):  
M. D. Vaudin ◽  
J. P. Cline
Keyword(s):  
Neutron Diffraction ◽  
Rapid Method ◽  
Crystallographic Orientation ◽  
Specimen Surface ◽  
X Ray Diffraction ◽  
Anisotropic Crystal ◽  
X Ray ◽  
Verification Method ◽  
Crystal Properties ◽  
Backscattered Electron

The study of preferred crystallographic orientation (texture) in ceramics is assuming greater importance as their anisotropic crystal properties are being used to advantage in an increasing number of applications. The quantification of texture by a reliable and rapid method is required. Analysis of backscattered electron Kikuchi patterns (BEKPs) can be used to provide the crystallographic orientation of as many grains as time and resources allow. The technique is relatively slow, particularly for noncubic materials, but the data are more accurate than any comparable technique when a sufficient number of grains are analyzed. Thus, BEKP is well-suited as a verification method for data obtained in faster ways, such as x-ray or neutron diffraction. We have compared texture data obtained using BEKP, x-ray diffraction and neutron diffraction. Alumina specimens displaying differing levels of axisymmetric (0001) texture normal to the specimen surface were investigated.BEKP patterns were obtained from about a hundred grains selected at random in each specimen.

Using Conventional Articulation Tests With Highly Unintelligible Children

1992 ◽  
Vol 23 (1) ◽  
pp. 52-60 ◽  
Author(s):  
Pamela G. Garn-Nunn ◽  
Vicki Martin
Keyword(s):  
Test Results ◽  
Phonological Processes ◽  
Rule Based ◽  
Severity Level ◽  
Error Sensitivity ◽  
Conventional Tests ◽  
Severity Levels ◽  
Conventional Test ◽  
Impaired Children

This study explored whether or not standard administration and scoring of conventional articulation tests accurately identified children as phonologically disordered and whether or not information from these tests established severity level and programming needs. Results of standard scoring procedures from the Assessment of Phonological Processes-Revised, the Goldman-Fristoe Test of Articulation, the Photo Articulation Test, and the Weiss Comprehensive Articulation Test were compared for 20 phonologically impaired children. All tests identified the children as phonologically delayed/disordered, but the conventional tests failed to clearly and consistently differentiate varying severity levels. Conventional test results also showed limitations in error sensitivity, ease of computation for scoring procedures, and implications for remediation programming. The use of some type of rule-based analysis for phonologically impaired children is highly recommended.

Vestibular Function and Motion Sickness Susceptibility: Videonystagmographic Evidence From Oculomotor and Caloric Tests

2020 ◽  
Vol 29 (2) ◽  
pp. 188-198
Author(s):  
Cynthia G. Fowler ◽  
Margaret Dallapiazza ◽  
Kathleen Talbot Hadsell
Keyword(s):  
Phase Velocity ◽  
Motion Sickness ◽  
Repeated Measures ◽  
Short Form ◽  
Vestibular Function ◽  
Slow Phase ◽  
Test Results ◽  
Normal Range ◽  
Slow Phase Velocity ◽  
Caloric Tests

Purpose Motion sickness (MS) is a common condition that affects millions of individuals. Although the condition is common and can be debilitating, little research has focused on the vestibular function associated with susceptibility to MS. One causal theory of MS is an asymmetry of vestibular function within or between ears. The purposes of this study, therefore, were (a) to determine if the vestibular system (oculomotor and caloric tests) in videonystagmography (VNG) is associated with susceptibility to MS and (b) to determine if these tests support the theory of an asymmetry between ears associated with MS susceptibility. Method VNG was used to measure oculomotor and caloric responses. Fifty young adults were recruited; 50 completed the oculomotor tests, and 31 completed the four caloric irrigations. MS susceptibility was evaluated with the Motion Sickness Susceptibility Questionnaire–Short Form; in this study, percent susceptibility ranged from 0% to 100% in the participants. Participants were divided into three susceptibility groups (Low, Mid, and High). Repeated-measures analyses of variance and pairwise comparisons determined significance among the groups on the VNG test results. Results Oculomotor test results revealed no significant differences among the MS susceptibility groups. Caloric stimuli elicited responses that were correlated positively with susceptibility to MS. Slow-phase velocity was slowest in the Low MS group compared to the Mid and High groups. There was no significant asymmetry between ears in any of the groups. Conclusions MS susceptibility was significantly and positively correlated with caloric slow-phase velocity. Although asymmetries between ears are purported to be associated with MS, asymmetries were not evident. Susceptibility to MS may contribute to interindividual variability of caloric responses within the normal range.

Item Context and /s/ Phone Articulation Test Results

1972 ◽  
Vol 15 (4) ◽  
pp. 852-860 ◽  
Author(s):  
Zoe Zehel ◽  
Ralph L. Shelton ◽  
William B. Arndt ◽  
Virginia Wright ◽  
Mary Elbert
Keyword(s):  
Test Score ◽  
Sound Production ◽  
Broad Context ◽  
Test Results ◽  
Production Task ◽  
Test Result

Fourteen children who misarticulated some phones of the /s/ phoneme were tape recorded articulating several lists of items involving /s/. The lists included the Mc-Donald Deep Test for /s/, three lists similar to McDonald’s but altered in broad context, and an /s/ sound production task. Scores from lists were correlated, compared for differences in means, or both. Item sets determined by immediate context were also compared for differences between means. All lists were found to be significantly correlated. The comparison of means indicated that both broad and immediate context were related to test result. The estimated “omega square” statistic was used to evaluate the percentage of test score variance attributable to context.

Sign in / Sign up

Export Citation Format

Share Document