scholarly journals Temporal Analysis of Urban-Suburban PET, mPET and UTCI Indices in Belgrade (Serbia)

Atmosphere ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 916
Author(s):  
Milica Pecelj ◽  
Andreas Matzarakis ◽  
Mirjam Vujadinović ◽  
Milan Radovanović ◽  
Nemanja Vagić ◽  
...  
Keyword(s):  
Heat Budget ◽  
Meteorological Data ◽  
Winter Season ◽  
Temporal Analysis ◽  
Human Needs ◽  
Sports Events ◽  
Study Results ◽  
The Difference ◽  
Maximum Temperatures ◽  
Bioclimatic Conditions

The analysis of the bioclimatic conditions is becoming increasingly relevant in climate interpretations for human needs, particularly in spatial planning, tourism, public health, sports events, bio-prognosis, etc. In this context, our study presents general temporal bioclimatic conditions in Belgrade, defined based on the PET, mPET and UTCI heat budget indices. Monthly, seasonal and annual indices were analyzed for urban and suburban weather stations based on 43 annual sets of meteorological data obtained by hourly observations at 7 h and 14 h CET. This study aims to present the distribution of PET, mPET and UTCI indices to show the pattern of each index in a mild climate location and to examine annual and seasonal differences of each index in the Belgrade urban center and suburban part of the city. The study results indicate higher biothermal stress in the urban area compared to the suburban zone and that the indices are congruent during the summer. At the same time, during the winter, they are more difficult to compare due to their peculiarities becoming more noticeable. The results obtained of all mean monthly and mean annual values of all three indices clearly indicate the difference that follows the definition of the urban heat island (UHI), particularly those from morning observation and winter season. The UTCI index shows the most significant monthly, seasonal and annual difference between urban and suburban areas for both observations. The annual difference of ΔUTCI7h amounts to 1.5 °C is the same as the annual difference of minimum temperatures (Δtmin). In contrast, the annual differences of ΔPET7h ΔmPET7h are °smaller (0.8 °C and 0.7 °C) and closer to the annual differences of maximum temperatures Δtmax amounted of 0.6 °C.

scholarly journals Summer variation of the UTCI index and Heat Waves in Serbia

2019 ◽  
Author(s):  
Milica M. Pecelj ◽  
Milica Z. Lukić ◽  
Dejan J. Filipović ◽  
Branko M. Protić
Keyword(s):  
Heat Stress ◽  
Heat Wave ◽  
Heat Waves ◽  
Heat Budget ◽  
Meteorological Data ◽  
Climate Index ◽  
Daily Maximum ◽  
Thermal Climate ◽  
Maximum Temperatures ◽  
Novi Sad

Abstract. The objective of this paper is the assessment of bioclimatic conditions in Sebia. A special emphasis has been given to the heat budget bioclimatic Universal Thermal Climate Index (UTCI) whose purpose is to evaluate degree of thermal stress that human body is exposed to during the last twenty years. In addition, the thresholds of daily maximum temperatures are analysed in order to identify increase and frequency of heat waves in Serbia. For this research, daily and hourly (07 h and 14 h) meteorological data from 3 weather station (Mt. Zlatibor, Novi Sad, Niš) are collected for the period 1998–2017. The results show that the most frequent UTCI heat stress categories are strong heat stress and very strong heat stress. The most extreme heat waves events are occurred in 2007, 2012, 2015 and 2017. Moreover, there were three Heat wave events (HWE) in Niš occurred in July, 2007 lasting 3, 10 and 4 days in row. Heat wave events (HWE) In July 2007 (10 days) and July 2012 (9 days) in Niš are occurrences with maximum number of days in row recorded.

Comparative analysis of codon usage patterns in SARS-CoV-2, its mutants and other respiratory viruses

2021 ◽  
Author(s):  
Neetu Tyagi ◽  
Rahila Sardar ◽  
Dinesh Gupta
Keyword(s):  
Codon Usage ◽  
Codon Usage Bias ◽  
Gc Content ◽  
Respiratory Illness ◽  
Respiratory Viruses ◽  
Nucleotide Composition ◽  
Health Crisis ◽  
Study Results ◽  
Usage Patterns ◽  
The Difference

AbstractThe Coronavirus disease 2019 (COVID-19) outbreak caused by Severe Acute Respiratory Syndrome Coronavirus 2 virus (SARS-CoV-2) poses a worldwide human health crisis, causing respiratory illness with a high mortality rate. To investigate the factors governing codon usage bias in all the respiratory viruses, including SARS-CoV-2 isolates from different geographical locations (~62K), including two recently emerging strains from the United Kingdom (UK), i.e., VUI202012/01 and South Africa (SA), i.e., 501.Y.V2 codon usage bias (CUBs) analysis was performed. The analysis includes RSCU analysis, GC content calculation, ENC analysis, dinucleotide frequency and neutrality plot analysis. We were motivated to conduct the study to fulfil two primary aims: first, to identify the difference in codon usage bias amongst all SARS-CoV-2 genomes and, secondly, to compare their CUBs properties with other respiratory viruses. A biased nucleotide composition was found as most of the highly preferred codons were A/U-ending in all the respiratory viruses studied here. Compared with the human host, the RSCU analysis led to the identification of 11 over-represented codons and 9 under-represented codons in SARS-CoV-2 genomes. Correlation analysis of ENC and GC3s revealed that mutational pressure is the leading force determining the CUBs. The present study results yield a better understanding of codon usage preferences for SARS-CoV-2 genomes and discover the possible evolutionary determinants responsible for the biases found among the respiratory viruses, thus unveils a unique feature of the SARS-CoV-2 evolution and adaptation. To the best of our knowledge, this is the first attempt at comparative CUBs analysis on the worldwide genomes of SARS-CoV-2, including novel emerged strains and other respiratory viruses.

scholarly journals Religiousness Attitude During Adulthood Elderly (Psychology Of Religion Perspectives)

RELIGIA ◽  
2017 ◽  
Vol 20 (1) ◽  
pp. 85
Author(s):  
Muhamad Rifa'i Subhi
Keyword(s):  
Research Method ◽  
Religious Life ◽  
Religious Involvement ◽  
Boarding School ◽  
Psychology Of Religion ◽  
The Elderly ◽  
Qualitative Approach ◽  
The Real ◽  
Study Results ◽  
The Difference

Islam teaches the difference in someone's level of religiosity. The level of human religiosity can change from one moment to another. Humans have evolved a religious life. Including human experience in adulthood elderly in life and face the problems of life. This study focused on the real description of the attitude of religiosity which is owned by the elderly. The study was taken from the students at the boarding school Elderly Islamic boarding school (Pesantren) of Roudlotul Muta'allimin Dracik Kramat Batang. The research method used descriptive qualitative approach to straight dialogue (interview) of the respondents, namely the students of Elderly Islamic Boarding School (Pesantren). The study results showed that each of the students have the different religious involvement in filling elderly period (retirement). The involvement includes Ritual Involvement, Ideological Involvement, Intellectual involvement, experimental involvement, and consequential involvement.

scholarly journals Surface Heat Budget estimation for Laurance Lake, US

2021 ◽  
Vol 877 (1) ◽  
pp. 012005
Author(s):  
Dahlia S. Abed-Zaid ◽  
Hussein A. M. Al-Zubaidi
Keyword(s):  
Surface Temperature ◽  
Water Surface ◽  
Heat Budget ◽  
Meteorological Data ◽  
Longwave Radiation ◽  
Atmospheric Conditions ◽  
Large Lakes ◽  
Water Surface Temperature ◽  
Maximum Water ◽  
The Many

Abstract Estimating heat budget factors are important to understand the many physical processes of large lakes and their reaction to the atmosphere. Some of these components are affected by water temperature, while the other depends on atmospheric conditions. This paper estimates the total heat flux for Lawrence lake via a code developed in MATLAB environment. The code can deal with different time resolutions if the lake water surface temperature data were at different time resolutions from the meteorological data. Results showed that solar energy peaks at 842 Watt/m2 at 540 Julian day, which is very normal for a sunny summer day, while the longwave radiation has 204 Watt/m2 as a min value. The back radiation did not make any reaction for the variation, but it revealed a small gradient. Furthermore, evaporation recorded - 67 Watt/m2 as a minimum value at 659 Julian day and 360 Watt/m2 as a maximum value at 578.43 Julian day close to the maximum water surface temperature event.

scholarly journals Advantages of CO2 laser use in surgical management of otosclerosis

2003 ◽  
Vol 60 (3) ◽  
pp. 273-278 ◽  
Author(s):  
Svjetlana Matkovic ◽  
Boris Kitanoski ◽  
Zivorad Malicevic
Keyword(s):  
Hearing Loss ◽  
Surgical Management ◽  
Co2 Laser ◽  
Functional Results ◽  
Bony Labyrinth ◽  
Study Results ◽  
Classical Technique ◽  
Prospective Comparative Study ◽  
The Difference ◽  
Determination Of Parameters

Background. Otosclerosis is a progressive osteo-destructive disorder of the bony labyrinth in which the fixation of the stapes causes the hearing loss. The aim of this study was the postoperative determination of parameters of the effect of surgical intervention on hearing and the incidence of complications and, on the basis of the differences in the examined parameters of the study, the estimation of the eficacy of the two mentioned surgical thechniques in the treatment of otosclerosis. Methods. In our research 40 patients with conductive hearing loss caused by otosclerosis underwent surgery with CO2 laser. Functional results were compared postoperatively with the results of 40 patients operated by the classical technique without the use of CO2 laser. The research was accomplished as a prospective comparative study. Results. The air-bone interval (gap) as the difference between the rim of air and bone conductivity for separate frequencies did not significantly differ between the control and the experimental group. Both methods were effective in closing the air-bone gap with the rates of closure to within 10 dB in 82.6% and 75.3% for the laser and drill, respectively. The incidence of tinnitus was significantly lower in patients who underwent surgery with CO2 laser. The frequency of intraoperative and postoperative complications was significantly lower in the laser group. Differences were statistically significant for all parameters (p<0.05). Conclusion. On the basis of the degree of postoperative hearing improvement, tinnitus and the incidence of complications it can be concluded that the use of CO2 laser during inverse stapedoplasty represents an effective and safe method, justifying the promotion of its use in the surgical management of otosclerosis.

scholarly journals Beechwood density and changes of dimension at the locality Bor - Boljevac

2003 ◽  
pp. 171-185
Author(s):  
Borislav Soskic ◽  
Nebojsa Todorovic
Keyword(s):  
Management Units ◽  
Study Results ◽  
The Difference

The density and changes of dimension of beechwood were studied at the site Bor - Boljevac. Four trees were analyzed from different selected and established series of scientific and production experiments in the management units. The results were presented and statistically processed for the data measured at the height of 1. 3 m, and also for the data at three height levels along the technically valuable part of the stem. The study results show the difference between the trees and also within the same tree The study results were compared to the results from other localities in Serbia. They should contribute to the analysis and production of wood in this region.

scholarly journals Remote Sensing in Predicting Development Patterns of Built-up Land

2021 ◽  
Vol 2 (2) ◽  
pp. 56-64
Author(s):  
Iqbal Eko Noviandi ◽  
Ramadhan Alvien Hanif ◽  
Hasanah Rahma Nur ◽  
Nandi
Keyword(s):  
Remote Sensing ◽  
Urban Areas ◽  
Population Growth Rate ◽  
Landsat Imagery ◽  
Temporal Analysis ◽  
West Java ◽  
Development Patterns ◽  
Human Needs ◽  
Multi Temporal ◽  
Total Growth

Indonesia is a developing country whose construction and development are centered on the island of Java, especially in West Java Province. Sukabumi City is one of the areas in West Java. The development of urban areas is expanding due to various human needs to carry out the construction of buildings. Remote sensing that can be used to store developments with multi-temporal analysis with materials is Landsat imagery from 2001 to 2020. The method used is the Normalized Difference Built-up Index (NDBI). The purpose of this study is to map the development of the built-up land from year to year and predict the following years. The results of the research on the significant changes in built-up land occurred between 2013-2020, while from 2001 to 2013 there was not much change. Based on the research results, the total growth of built-up land was 1.539% per year with a population growth rate of 1.4% per year. The results of the analysis show that the area of ​​land built in Sukabumi City in 2028 is 186,7194 km2 or has increased by 21,2808 km2 since 2020.

scholarly journals Does corporate ownership affect capital structures and adjustment of capital structures — evidences from Chinese listed companies

2009 ◽  
Vol 6 (4) ◽  
pp. 532-541 ◽  
Author(s):  
Zhengwei Wang ◽  
Wei Lin ◽  
Michael Keefe
Keyword(s):  
Capital Structure ◽  
Transition Economy ◽  
Structural Difference ◽  
Firm Characteristics ◽  
Financial Friction ◽  
Listed Firms ◽  
Optimal Capital Structure ◽  
Study Results ◽  
Optimal Capital ◽  
The Difference

In Chinese transition economy, compared with state-owned firms, private firms face higher financial friction in financing activities, but have more incentive to adjust toward optimal capital structure to maximize the shareholders‟ benefit. Based on panel data of China’s listed firms from 1998 to 2007, we compare the capital structures of state-owned and privately-owned listed firms. The empirical results show that there is structural difference in static capital structure between state-owned and private listed firms while controlling for firm characteristics. We then investigate the difference in dynamics of the capital structure between these two groups of firms. Further study results tell us that the adjustment to an optimal capital structure to be faster for the private firm than for the state-owned firm.

scholarly journals Is snow sublimation important in the alpine water balance?

2007 ◽  
Vol 1 (2) ◽  
pp. 303-350 ◽  
Author(s):  
U. Strasser ◽  
M. Bernhardt ◽  
M. Weber ◽  
G. E. Liston ◽  
W. Mauser
Keyword(s):  
Forest Canopy ◽  
Snow Water Equivalent ◽  
Distributed Simulation ◽  
Meteorological Data ◽  
Winter Season ◽  
Balance Model ◽  
Winter Period ◽  
Detailed Model ◽  
Physically Based ◽  
Snow Transport

Abstract. In alpine terrain, snow sublimation as a component of the winter moisture budget represents a proportion of precipitation which does not contribute to melt. To quantify its amount we analyze the spatial pattern of snow sublimation at the ground, from a canopy and from turbulent suspension during wind-induced snow transport for a high alpine area in the Berchtesgaden National Park (Germany), and we discuss the efficiency of these processes with respect to seasonal snowfall. Therefore, we utilized hourly meteorological recordings from a network of automatic stations, and a distributed simulation framework comprising validated, physically based models. Meteorological data records were spatially distributed over the simulation domain by means of a quasi-physically based interpolation scheme that accounts for topographic influences on the distributed fields. The applied simulation tools were: a detailed model for shortwave and longwave radiative fluxes, a mass and energy balance model for the ground snow cover, a model for the microclimatic conditions within a forest canopy and related snow-vegetation interactions including snow sublimation from the surface of the trees, and a model for the simulation of wind-induced snow transport and related sublimation from suspended snow particles. For each of the sublimation processes, mass rates were quantified and aggregated over an entire winter season. Sublimation from the ground and from most canopy types are spatially relatively homogeneous and sum up to about 100 mm of snow water equivalent (SWE) over the winter period. Accumulated seasonal sublimation due to turbulent suspension is small in the valley areas, but can locally, at very wind-exposed mountain ridges, add up to more than 1000 mm of SWE. The fraction of these sublimation losses of winter snowfall is between 10 and 90%.

scholarly journals Digital literacy in a post Coronavirus era: a management perspective for small businesses in Africa

2020 ◽  
Vol 1 (3) ◽  
pp. 203-212
Author(s):  
Arachie Augustine Ebuka ◽  
◽  
Hope Ngozi Nzewi ◽  
Emejulu Gerald ◽  
Kekeocha Mary Ezinne ◽  
...  
Keyword(s):  
Digital Technology ◽  
Digital Literacy ◽  
Small Businesses ◽  
Management Skills ◽  
Qualitative Review ◽  
Digital Ecosystem ◽  
Study Results ◽  
Digital Skills ◽  
Review Study ◽  
The Difference

Purpose: This study examined how small businesses in Africa can use technology to grow and sustain their businesses in a post-Covid-19 world. The paper looked at various digital skills needed by these businesses to navigate and profit from the digital space's massive opportunities. It also ascertained the challenges facing them from keying into the digital ecosystem. The place of technology in the fight against Covid-19 was also highlighted. Research methodology: This study is a qualitative review study. Results: The study concluded that possessing some form of digital skills by business owners and employees could be the difference between a competing and a non-competing organization. Limitations: The work did not use methodology as it is a qualitative review study that limited the study's generalizability. Contribution: This work represents a current work in digital technology and how it relates to pandemic situations and economic challenges, especially in Africa. Keywords: Digital, Technology, Covid-19, Small businesses, Management, Skills

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