Detection of Fog Involving Heavy Pollutants by Using the New Geostationary satellite Himawari-8

2020 ◽  
Author(s):  
Hongbin Wang ◽  
Zhiwei Zhang ◽  
Duanyang Liu
Keyword(s):  
Satellite Observation ◽  
Geostationary Satellite ◽  
Japan Meteorological Agency ◽  
Composite Image ◽  
Brightness Temperatures ◽  
The Difference ◽  
Grid Points ◽  
High Level ◽  
Different Levels ◽  
Better Than

<p>Himawari-8 is the new geostationary satellite of the Japan Meteorological Agency (JMA) and carries the Advanced Himawari Imager (AHI), which is greatly improved over past imagers in terms of its number of bands and its temporal/spatial resolution. In this work, two different methods for the detection of the different levels of fog involving heavy pollutants by using the Himawari-8 were developed in China. The two different methods are the method of the difference between the 11.2 mm and 3.9 mm brightness temperatures (BTD<sub>3.9-11.2</sub>) and the method of 3.9 mm Pseudo-Emissivity (ems<sub>3.9</sub>).  The 3.9 mm Pseudo-Emissivity is the ratio of the observed 3.9 mm radiance and the 3.9 mm blackbody radiance calculated using the 11.2 mm brightness temperature. We identified the parameters optimal threshold at the 2400 stations and the grid points using the BTD<sub>3.9-11.2</sub> and ems<sub>3.9</sub> for different levels of fog involving heavy pollutants. Results on land and sea from the two methods were compared with surface observations from 2400 weather stations in China and CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) VFM (Vertical Feature Mask) products. The results show that both the method of BTD<sub>3.9-11.2</sub> and the method of ems<sub>3.9</sub> can accurately identify the different levels of fog involving heavy pollutants and the accuracy of ems<sub>3.9 </sub>method is slightly better than the BTD<sub>3.9-11.2</sub>. The accuracy of two methods has increased significantly and the false alarm rate has significantly decreased with the decrease of the visibility. When the visibility is less than 50 m, the HR, FAR and KSS of the BTD<sub>3.9-11.2</sub> method (the ems<sub>3.9 </sub>method) were 0.89 (0.90), 0.15 (0.15) and 0.74 (0.75), respectively. When mid- or high-level clouds were removed using surface temperature of the ground observations, the HR and KSS of two methods for the different levels of fog has increased significantly, and the FAR has significantly decreased. When the visibility is less than 1000 m, the HR of the BTD<sub>3.9-11.2</sub> method (the ems<sub>3.9 </sub>method) is increased to 0.81(0.85) from 0.71 (0.74), the FAR is decreased to 0.12 (0.13) from 0.27 (0.28), and the KSS is increased to 0.69 (0.72) from 0.44 (0.46). The KSS of two method increase by 0.23 and 0.26, respectively. Three cases analysis show that the fog area can be clearly identified by using the BTD<sub>3.9-11.2</sub>, ems<sub>3.9</sub> and RGB composite image. The results of the detection of sea fog by using Himawari-8 data and using CALIPSO VFM products have consistency.</p>

scholarly journals Six ultraviolet minutes for cleaner operating theatres

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
R Bosco ◽  
S Gambelli ◽  
V Urbano ◽  
G Cevenini ◽  
G Messina
Keyword(s):  
Cross Sectional Study ◽  
Cross Sectional ◽  
Before And After ◽  
Operating Theatres ◽  
Cleaning Procedures ◽  
The Difference ◽  
Contamination Levels ◽  
Different Levels ◽  
Better Than ◽  
Final Cleaning

Abstract Background Sanitizing the operating theatres (OT) is important to minimize risk of post-operative infections. Disinfection procedures between one operation and another is less aggressive than final cleaning procedures, at the end of the day. Aim was assessing the difference of contamination: i) between different levels of disinfection; ii) before and after the use of a UVC Device (UVC-D). Methods Between December 2019/February 2020 a cross sectional study was conducted in OT in a real clinical context. 94 Petri dishes (PD) were used in 3 OT. Three different sanitation levels (SL1-3) were compared pre- and post-use of UVC-D: i) No cleaning after surgery (SL1); ii) after in-between cleaning (SL2); iii) after terminal cleaning (SL3). UVC-D was employed for 6 minutes, 3 minutes per bed side. PD were incubated at 36 °C and colony forming unit (CFU) counted at 48h. Descriptive statistic, Wilcoxon and Mann-Whitney tests were performed to assess the contamination levels in total, pre/post use of UVC-D, and between different sanitation levels, respectively. Results In total we had a mean of 3.39 CFU/PD (C.I. 2.05 - 4.74) and a median of 1 CFU/PD (Min. 0 - Max. 39), after UVC-D use we had a mean of 2.20 CFU/PD (C.I. 0.69 - 5.09) and a median of 0 CFU/PD (Min. 0 - Max. 133). The UVC-D led to a significant reduction of CFU (p < 0.001). Without UVC-D we had a significant CFU drop (p < 0.05) between SL1 and SL3. Using UVC-D, we observed significant reductions of contamination (p < 0.05) between SL3 and SL1. Comparing SL1 (median 0) post UVC-D use vs SL2 pre UVC-D use (median 0.5), and SL2 post UVC-D use (median 0) vs SL3 pre UVC-D use (median 1) we had a significant reduction of contamination (p < 0.05). Conclusions UVC-D improved environmental contamination in any of the three sanitation levels. Furthermore, the use of UVC-D alone was better than in-between and terminal cleaning. Although these encouraging results, the cleaning procedures executed by dedicated staff has to be considered. Key messages UVC are efficient to decrease contamination in operating theatres regardless of sanitation levels. The additional use of UVC technology to standard cleaning procedures significantly improves sanitation levels.

Distinction between Dolus and Culpa with reference to Arson in Zakon Sudnyj LJudem, the Vinodol Law and the Statute of Senj

De Jure ◽  
2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Daniel Haman ◽  
◽  
◽  
Keyword(s):  
Criminal Law ◽  
The Other ◽  
Legal Documents ◽  
The Third ◽  
Other Hand ◽  
Criminal Offenses ◽  
The World ◽  
The Difference ◽  
Different Levels ◽  
Better Than

The difference between intent (dolus) and negligence (culpa) was rarely emphasized in codified medieval laws and regulations. When compared to the legal statements related to intent, negligence was mentioned even more rarely. However, there are some laws that distinguished between the two concepts in terms of some specific crimes, such as arson. This paper draws attention to three medieval Slavic legal documents – the Zakon Sudnyj LJudem (ZSLJ), the Vinodol Law and the Statute of Senj. They are compared with reference to regulations regarding arson, with the focus being on arson as a crime committed intentionally or out of negligence. The ZSLJ as the oldest known Slavic law in the world shows some similarities with other medieval Slavic legal codes, especially in the field of criminal law, since most of the ZSLJ’s articles are related to criminal law. On the other hand, the Vinodol Law is the oldest preserved Croatian law and it is among the oldest Slavic codes in the world. It was written in 1288 in the Croatian Glagolitic script and in the Croatian Chakavian dialect. The third document – the Statute of Senj – regulated legal matters in the Croatian littoral town of Senj. It was written in 1388 – exactly a century after the Vinodol Law was proclaimed. When comparing the Vinodol Law and the Statute of Senj with the Zakon Sudnyj LJudem, there are clear differences and similarities, particularly in the field of criminal law. Within the framework of criminal offenses, the act of arson is important for making a distinction between intent and negligence. While the ZSLJ regulates different levels of guilt, the Vinodol Law makes no difference between dolus and culpa. On the other hand, the Statute of Senj strictly refers to negligence as a punishable crime. Even though the ZSLJ is almost half a millennium older than the Statute of Senj and around 400 years older than the Vinodol Law, this paper proves that the ZSLJ defines the guilt and the punishment for arson much better than the other two laws.

scholarly journals Saliency Detection by Multilevel Deep Pyramid Model

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Hai Wang ◽  
Lei Dai ◽  
Yingfeng Cai ◽  
Long Chen ◽  
Yong Zhang
Keyword(s):  
Background Noise ◽  
State Of The Art ◽  
Saliency Detection ◽  
Saliency Map ◽  
Multiple Features ◽  
Low Level ◽  
Pyramid Model ◽  
High Level ◽  
Different Levels ◽  
Better Than

Traditional salient object detection models are divided into several classes based on low-level features and contrast between pixels. In this paper, we propose a model based on a multilevel deep pyramid (MLDP), which involves fusing multiple features on different levels. Firstly, the MLDP uses the original image as the input for a VGG16 model to extract high-level features and form an initial saliency map. Next, the MLDP further extracts high-level features to form a saliency map based on a deep pyramid. Then, the MLDP obtains the salient map fused with superpixels by extracting low-level features. After that, the MLDP applies background noise filtering to the saliency map fused with superpixels in order to filter out the interference of background noise and form a saliency map based on the foreground. Lastly, the MLDP combines the saliency map fused with the superpixels with the saliency map based on the foreground, which results in the final saliency map. The MLDP is not limited to low-level features while it fuses multiple features and achieves good results when extracting salient targets. As can be seen in our experiment section, the MLDP is better than the other 7 state-of-the-art models across three different public saliency datasets. Therefore, the MLDP has superiority and wide applicability in extraction of salient targets.

scholarly journals Academic Performance as a Function of Level of Aspiration & Gender – A Comparative Study amongst Different Streams of Education

2016 ◽  
Vol 3 (3) ◽  
Author(s):  
Anshu Paliwal ◽  
Dr. Nanda Rathi
Keyword(s):  
Academic Performance ◽  
Comparative Study ◽  
Low Achievers ◽  
Low Level ◽  
Significant Difference ◽  
The Difference ◽  
High Level ◽  
Age Range ◽  
Level Of Aspiration ◽  
Better Than

The present study examines the level of aspiration of students belonging to different streams of education and its impact on academic performance. The sample of the study consisted of 717 students (358 males and 358 females). The age range of the sample was 18 to 19 years. Tool used for measuring level of aspiration was Level of Aspiration Measure developed by Dr. Mahesh Bhargava and Prof. M A Shah. Goal Discrepancy Score is the difference between aspiration and the achievement on the same trial. The percentiles of marks obtained in the last qualifying exam were treated as an indicator of academic performance. For inferential purpose the data was treated with ANOVA and Scheffe’s test of Multiple Comparison. The findings of the study revealed that no significant difference exists between Academic Performance of students with high and low achievers belonging to Engineering and Management streams of education; however there exists significant differences between academic performances of students with high and low Level of Aspiration belonging to Law fraternity; with students showing low Level of Aspiration performing better than students with high Level of Aspiration. There exists no significant difference between academic performance of boys and girls with respect to Level of Aspiration in engineering stream. However, there exists significant difference between academic performance of boys and girls with respect to Level of Aspiration in Management and Legal streams of education. In both the streams girls outshine boys.

scholarly journals Intercomparison of Assimilated Coastal Wave Data in the Northwestern Pacific Area

2020 ◽  
Vol 8 (8) ◽  
pp. 579 ◽  
Author(s):  
Yukiharu Hisaki
Keyword(s):  
Wave Height ◽  
Analysis Data ◽  
Wave Climate ◽  
Japan Meteorological Agency ◽  
Northwestern Pacific ◽  
Wave Data ◽  
Marine Disaster ◽  
The Difference ◽  
Disaster Protection ◽  
Better Than

The assimilated coastal wave data are useful for wave climate study, coastal engineering, and design for marine disaster protection. However, the assimilated coastal wave data are few. Here, wave analysis data produced by the JMA (Japan Meteorological Agency) and ERA5 wave data were compared with GPS (Global Positioning System) buoy-measured wave data. In addition, the accuracy of ERA5 wave data for various conditions was investigated. The accuracy of JMA analysis wave height was better than that of ERA5 wave height. The ERA5 wave height was underestimated as the wave height increased. The accuracy of the ERA5 wave height was significantly different in fetch-unlimited and fetch-limited conditions. The difference of the skill metrics between fetch-unlimited and fetch-limited conditions was due to the overestimation of the fetch in the ERA5 grid. This result also applied to the wave period.

Control of Supersonic Elliptic Jet with Ventilated Tabs

2020 ◽  
Vol 37 (3) ◽  
pp. 267-283 ◽  
Author(s):  
Saif Akram ◽  
E. Rathakrishnan
Keyword(s):  
Pressure Gradient ◽  
Pressure Ratio ◽  
Adverse Pressure Gradient ◽  
Mixing Enhancement ◽  
Pressure Gradients ◽  
Favorable Pressure Gradient ◽  
The Difference ◽  
The Waves ◽  
Different Levels ◽  
Better Than

AbstractControl of Mach 1.5 elliptic jet with ventilated triangular tabs is studied experimentally, in the presence of different levels of pressure gradient at the nozzle exit. Three different sets of ventilated tabs with circular, triangular and trapezoidal ventilations were studied. Two tabs were placed, at the ends of major and minor axes, at the exit of the elliptic nozzle of aspect ratio 3.37. The mixing enhancement caused by these tabs was studied in the presence of adverse and favorable pressure gradients, corresponding to nozzle pressure ratio (NPR) from 3 to 8. For Mach 1.5 jet NPR 3 corresponds to 18 % adverse pressure gradient and NPR 8 corresponds to 118 % favorable pressure gradient. The results of ventilated tabs are compared with unventilated truncated triangular tabs of identical geometry. The difference between the mixing promoting efficiency of the unventilated and ventilated tabs is only marginal (around 5–6 %). All tabs cause jet bifurcation and weaken the waves in the jet core. The tab with trapezoidal ventilation, at NPR 3, promotes mixing to an extent of reducing the core to about 92 %. At higher NPRs the mixing caused by unventilated tab is slightly better than the ventilated tabs.

Comparison and Analysis of the Competitiveness of Two Groups of World Outstanding Male Professional Golfer

2011 ◽  
Vol 187 ◽  
pp. 210-215
Author(s):  
Zhi Yong Huang ◽  
Lie Bao Han ◽  
Gui Yan
Keyword(s):  
Comparison Group ◽  
Principal Component ◽  
The Other ◽  
The World ◽  
Comparison And Analysis ◽  
The Difference ◽  
World Ranking ◽  
Level Group ◽  
Different Levels ◽  
Better Than

In this article, the top 15 golfers are chosen for the top-level group and another 15 golfers ranking from 56 to 70 are chosen for the comparison group, according to the world ranking of PGA TOUR. The two groups are the main objects of study. This research aims to better understand the difference of competitiveness of the two groups, using mathematics statistics and comparative studies. First, average driving distance, driving accuracy percentage, greens in regulation percentage, putting average, birdie average, sand save percentage, scoring average, putts per round and par breakers are analyzed through principal component analysis. The result shows that they all can reveal the competitiveness of the golfers and they can also be used for analyzing the competitiveness of other golfers of different levels. Then, the competitiveness of the golfers in the top-level group is compared with that of the golfers in the comparison group. And the result shows that average driving distance、birdie average、scoring average and par breakers of golfers in the top-level group are much better than those of the golfers in the comparison group where Wenchong Liang belongs, but there is no obvious difference of the other 5 aspects.

Membrane Keyboards and Human Performance

1982 ◽  
Vol 26 (5) ◽  
pp. 424-424
Author(s):  
Karen M. Cohen
Keyword(s):  
Human Performance ◽  
Rapid Learning ◽  
Design Flexibility ◽  
Extended Practice ◽  
Additional Improvement ◽  
The Difference ◽  
Future Work ◽  
Human Factors Research ◽  
Different Levels ◽  
Better Than

Membrane switch technology has become increasingly popular in many consumer-oriented products due to its low production cost and design flexibility. However, the absence of familiar key travel associated with membrane switches removes an important, direct source of feedback to the user with respect to specific keystrokes. Hence, the conventional wisdom has been that membrane switches without key travel are unacceptable for keyboard applications such as typing tasks. This paper describes systematic human factors research in which typing performance using a commercially available membrane keyboard and a conventional, full-travel keyboard was compared for subjects representing different levels of typing proficiency. Each subject (N = 21) used a membrane keyboard for 3 consecutive (or nearly consecutive) days and a conventional keyboard for 3 consecutive (or nearly consecutive) days. Each day of experience consisted of a one-hour session in which various typing exercises were completed. Traditional tests of typing performance were administered at the beginning and end of each session. The results indicate that for non-touch typists there was little difference in performance between keyboards. For touch typists performance with the conventional keyboard was initially much better than that with the membrane keyboard. There was, however, rapid learning with the membrane keyboard such that, within a few sessions, the difference in typing performance between the conventional and membrane keyboards was reduced substantially. There remained some advantage for the conventional keyboard, compared with the membrane keyboard evaluated here. Future work will be aimed at measurement of the additional improvement in performance resulting from extended practice with better-designed membrane keyboards.

scholarly journals Establishing biotic stress tolerance of maize (Zea mays L.) by measuring hydroxamic acid contents

2018 ◽  
pp. 107-112
Author(s):  
Péter Makleit ◽  
Dóra Frommer ◽  
Szilvia Veres
Keyword(s):  
Acid Content ◽  
Hydroxamic Acid ◽  
Hydroxamic Acids ◽  
Main Task ◽  
Cyclic Hydroxamic Acids ◽  
The Difference ◽  
High Level ◽  
Cyclic Hydroxamic Acid ◽  
Infiltration Method ◽  
Different Levels

  Cyclic hydroxamic acids are the most considerable secondary metabolites in grasses and their main task is to protect these species from pathogens and pests. The cyclic hydroxamic acid content and common smut susceptibility were examined in our experiments. 27 maize hybrids were used for experimental plants in a climate room, where the plants were grown on a nutrient solution. An infiltration method was used for the inoculation of the plants. The total quantity of cyclic hydroxamic acids was determined and the ratio of infected plants and the ratio of inhibition was determined, too. Based on our results, on the basis of all hybrids’ data, the total hydroxamic acid content of the infected plants was higher than in the control. On the level of individual hybrids, only 9 of them had higher cyclic hydroxamic acid content in the case of infection. Increase in cyclic hydroxamic content induced by the fungus in this case is a tool for the fungus to suppress other pathogens and pests. Amongst the hybrids’ cyclic hydroxamic acid contents, significant differences were detected in the control and in the infected treatment, too. The so-called “sweetcorn” hybrids showed high level of cyclic hydroxamic acid content. According to the differences amongst hybrids, homogenous groups were created which groups differed in the case of control and infected treatment, because of the difference in increase of cyclic hydroxamic acid content. The examined hybrids showed different levels of infection and different rate of growth inhibition for the effect of inoculation. According to the infection caused damage hybrids were ranked. Infection caused notable damage for hybrids Prelude, Desszert 73, DKC5276 and DK440.

scholarly journals CHALLENGES FACING DISTANCE LEARNING IN THE NEGEV REGION

2021 ◽  
Vol 3 (1) ◽  
pp. 378-389
Author(s):  
Mawaheb Shehadeh ALKRRENAWI ◽  
Keyword(s):  
Distance Learning ◽  
Survey Method ◽  
Years Of Experience ◽  
Arithmetic Average ◽  
Academic Qualification ◽  
Preparatory Schools ◽  
Medium Level ◽  
The Difference ◽  
High Level ◽  
Different Levels

The study aimed to identify the level of challenges facing distance learning in preparatory schools within the Negev region from the teachers' point of view, and to reveal the difference in their views towards the challenges facing distance learning in the schools of the Negev region according to different levels of (Gender, Academic qualification, and Years of experience) variables. The study used the sample social survey method, and the questionnaire as a tool for collecting data. The study sample consisted of (302) teachers who were selected from preparatory schools in the Negev region, besides, the questionnaire was applied via websites to the targeted sample. The results showed that the total level of challenges facing distance learning in schools within the Negev region came at a High level, with an arithmetic average (3.818), as the Economic challenges area came first with an arithmetic average (4.208) and a High level, the Technological challenges area came second with an arithmetic average (4.119) and a high level, the Teacher-related challenges area came third with an arithmetic average (3.580) and a Medium level, and in the area Student-related challenges area came fourth with an Arithmetic average (3.365) and a Medium level. The results also showed that there were no statistically significant differences at the level of significance (α = 0.05) in the averages of the study sample responses about the challenges facing distance learning in the schools within the Negev region attributed to the different levels of Gender and Academic qualification variables, while there were statistically significant differences at (α = 0.05) due to the difference in the Years of experience variable in favor of those with long experience.

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