scholarly journals Solar and Shading Potential of Different Configurations of Building Integrated Photovoltaics Used as Shading Devices Considering Hot Climatic Conditions

2018 ◽  
Vol 10 (12) ◽  
pp. 4373 ◽  
Author(s):  
Omar Asfour
Keyword(s):  
Saudi Arabia ◽  
Numerical Modelling ◽  
Tilt Angle ◽  
Climatic Conditions ◽  
Building Integrated Photovoltaics ◽  
Inclination Angles ◽  
Annual Total ◽  
The Common ◽  
Shading Devices ◽  
Window Area

This study investigates the use of building-integrated photovoltaics (BIPVs) as shading devices in hot climates, with reference to the conditions of Saudi Arabia. It used parametric numerical modelling to critically appraise the potential of eight design configurations in this regard, including vertical and horizontal shading devices with different inclination angles. The study assumed that the examined shading devices could be entirely horizontal or vertical on the three exposed facades, which is common practice in architecture. The study found that the examined configurations offered different solar and shading potentials. However, the case of horizontal BIPV shading devices with a 45° tilt angle received the highest amount of annual total insolation (104 kWh/m2) and offered effective window shading of 96% of the total window area on average in summer. The study concluded that, unlike the common recommendation of avoiding horizontal shading devices on eastern and western facades, it is possible in countries characterised with high solar altitudes such as Saudi Arabia to use them effectively to generate electricity and provide the required window shading.

scholarly journals Optimizing the Solar PV Tilt Angle to Maximize the Power Output: A Case Study for Saudi Arabia

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 15914-15928
Author(s):  
Ridha Ben Mansour ◽  
Meer Abdul Mateen Khan ◽  
Fahad Abdulaziz Alsulaiman ◽  
Rached Ben Mansour
Keyword(s):  
Saudi Arabia ◽  
Tilt Angle ◽  
Power Output ◽  
Solar Pv

Married Couples’ Perception of the Excessive Use of SocialMedia and its Impact on Marital Problems in Saudi Arabia

2021 ◽  
Vol 18 (1A) ◽  
pp. 61-94
Author(s):  
Nashmi Alanazi
Keyword(s):  
Social Media ◽  
Saudi Arabia ◽  
Interpersonal Communication ◽  
Saudi Arabian ◽  
Married Couples ◽  
Marital Relationships ◽  
Marital Problems ◽  
Family Responsibilities ◽  
The Common ◽  
Use Of Social Media

Abstract: This study explores married couples’ perception of the effects of using social media on marital relationships in Saudi Arabian society. The study discusses the growing use of social media, the common applications used, the reasons why married couples use social media, and the potential marital problems caused by the excessive use of social media. These issues are explored through the viewpoints of married couples living in Saudi Arabia. An online-based questionnaire was used to collect data, and the data sample comprised 1,226 married Saudi citizens; 55.7% male and 44.3% female. The data was analyzed using SPSS. The results show that the use of social media is common among married couples in Saudi Arabia, and that the majority use social media excessively. WhatsApp, Twitter, Instagram, and Snapchat are the most common applications used. The study also finds that married couples use social media for a number of different purposes, including communicating with family and friends, keeping up to date with celebrity and social media influencers’ news, as well as sharing photos and videos with others. Finally, spouses think that their partner’s excessive use of social media can cause marital problems, including the feelings of jealousy, the neglect of family responsibilities, the weakening of interpersonal communication, and the feelings of mistrust. Keywords: Social Media, Excessive Use of Social Media, and Marital Problems.

The First Global Environmental Problem

2018 ◽  
pp. 38-54
Author(s):  
Hannah Holleman
Keyword(s):  
Arid Region ◽  
Climatic Conditions ◽  
Dust Bowl ◽  
Colonial Expansion ◽  
Global Environmental ◽  
Humid Region ◽  
The World ◽  
The Common ◽  
Ecological Relations ◽  
Economic Developments

This chapter challenges typical interpretations of the Dust Bowl and puts the disaster into a global frame, linking the past to the present. In so doing, the common roots of contemporary and past developments and struggles are revealed. The Dust Bowl was one spectacular instance of a global problem of soil erosion associated with capitalist colonial expansion. While the official interpretation suggests that agriculture suited for a humid region was imported to an arid region, precipitating the crisis, contemporaneous accounts illustrate how much larger the crisis was, tied up with specific social and economic developments that imposed new socio-ecological relations upon peoples of the world and upon the land irrespective of local climatic conditions. Ultimately, the common denominators across the world—from North to South America, Australia to Africa, and Southeast to East Asia—were not climate and geography, but capitalism and colonialism.

scholarly journals Two new reports of thrips (Thysanoptera: Thripidae) from India

2018 ◽  
Vol 10 (2) ◽  
pp. 11312
Author(s):  
R. R. Rachana ◽  
R. Varatharajan
Keyword(s):  
Frankliniella Occidentalis ◽  
Western Flower Thrips ◽  
Climatic Conditions ◽  
Southern India ◽  
Flower Thrips ◽  
The Common ◽  
Planting Materials ◽  
The Nilgiris ◽  
First Time ◽  
The Western Ghats

Caliothrips punctipennis (Hood) and the male of Western Flower Thrips Frankliniella occidentalis (Pergande) have been recorded for the first time from India.  F. occidentalis was collected on the leaves of Erythrina indica from Ooty in the Nilgiris, the Western Ghats, southern India, whereas C. punctipennis was collected from yellow pan traps laid at Great Nicobar, India.  Considering the quarantine importance of the pest F. occidentalis, the report of the male for the first time in India needs attention and concern.  Males are also known to be more effective vectors of tospoviruses than females.  Xerochrysum bracteatum, the Common Golden Everlasting Daisy, is often taken out of Ooty by tourists to other parts of the country.  This along with other planting materials carried by tourists and farmers could aid in the dispersal of F. occidentalis to the temperate regions of northern and southern India, where it is likely to thrive in the congenial climatic conditions prevalent there.  Under these circumstances, it is imperative that quarantine mechanisms within the country are activated and strengthened, to prevent the spread of this notorious pest to the rest of India from the pockets of its occurrence in southern India - particularly the Nilgiris.  The diagnostic characters of both species are discussed. 

scholarly journals A Preliminary Checklist of the Ants (Hymenoptera: Formicidae) of Qatar

2020 ◽  
Author(s):  
Salma AlHajri ◽  
Donat Agosti
Keyword(s):  
Saudi Arabia ◽  
Arabian Peninsula ◽  
Climatic Conditions ◽  
The State ◽  
Pitfall Traps ◽  
Insect Fauna ◽  
Mild Winter ◽  
Northeastern Part

The State of Qatar is a small peninsula located in the northeastern part of the Arabian Peninsula. It is classified as a subtropical desert with an extreme harsh climatic conditions in summer and mild winter. Information on Formicidae of Qatar as well as its insect fauna is poorly documented. So far only six species of Formicidae (ants) belonging to five genera have been recorded from Qatar. At least 300 ant species have been recorded from the Arabian Peninsula (Collingwood et al., 2011). For instance, Collingwood and Agosti (1996) reported a list of 265 ant species in Saudi Arabia. Moreover, Collingwood et al. (2011) published a list of 126 ant species in UAE and Sharaf et al. (2018a) recorded 123 ant species from Oman. This indicates a significant gap regarding our knowledge of the ant fauna and their diversity in Qatar. This study provides the first taxonomic survey of the ant fauna of Qatar. Ant specimens were collected by using aspirator, direct hand collection, litter sifting and pitfall traps during the period of April 2015 to March 2019 from 43 sites around the country. In the present study, 45 species are newly recorded for the ant fauna of the state of Qatar increasing the total number of ant species from Qatar to 51 species, including one additional subfamily, and 16 additional genera.

scholarly journals Methodology for Optimization of Road Works Schedule According to Local Climatic Data

2019 ◽  
Vol 8 (4) ◽  
pp. 1470-1476
Keyword(s):  
Time Management ◽  
General Rule ◽  
Climatic Conditions ◽  
Design Guidelines ◽  
Climatic Data ◽  
Usual Practice ◽  
Road Project ◽  
Technical Specifications ◽  
The Common ◽  
On The Road

Road works, either from public or from private sector, are designed and constructed according to specific requirements that are commonly governed by national regulations. In Greece, “Road Design Guidelines Manual” and “Greek Technical Specifications” of the Hellenic Organization for Standardization or, in some cases, European Norms, stand for the framework road works are implemented. The common practice for projects design, consists of usual addressing of schedule followed and periods of year that work is suspended. Financial and time requirements, following this framework, usually do not take into account prevailing weather behavior on each work site. A methodology to optimize this procedure, according to local climatic conditions, is presented in this paper. The improved schedule is finally conducted by considering, in addition to the common practice, special local climatic data, following a step by step scheme, comprehensively explained in this study. Usual practice dictated by Greek specifications on the road works field, is enlightened. Reduction of these valuable resources requirements is the main purpose of the proposed methodology. Accordingly, a holistic approach considering apart from common project time management techniques, climatic uniqueness of each work location as well, is the quintessence of this paper. Redistribution of working time-periods and re-arrangement of machinery equipment along with adequate personnel, based on climatic features of the location each road project takes place, is the crucial factor that boosts up productivity and releases resources that are unnecessarily assigned either to work or to be suspended in the frame of a typical timetable, main characteristic of which, is programming excluding winter months, as general rule. In this study, the frame, as for the schedule, considering the special climate features of each road project, is proposed accordingly.

scholarly journals Comparing Different Pedagogical Techniques to Teach Spelling at a Saudi High School: A Case Study

2019 ◽  
Vol 7 (1) ◽  
pp. 36
Author(s):  
Saad Althobaiti ◽  
Tariq Elyas
Keyword(s):  
High School ◽  
Saudi Arabia ◽  
High School Students ◽  
Research Method ◽  
Male Students ◽  
School Students ◽  
Repeated Practice ◽  
Post Test ◽  
The Common

<p><em>This study investigates whether teaching spelling to high school students using different techniques, i.e. copy, cover, compare and flip folder, would improve students’ spelling. Additionally, it explores students’ opinions and perceptions towards these techniques. The research conducted in Granada high school in Makkah, Saudi Arabia. Thirty-six male students participated in this study whose levels according to the course book were assumed to be B1 in the Common European Framework of Reference for Languages (CEFR). In this study, a mixed research method was used where data was analyzed quantitatively and qualitatively. The first group was taught using copy cover and compare method (CCC), which emphasizes repeated practice when errors occur in students spelling, whereas the second group was trained using the flip folder technique which is a combination of visual, auditory, and kinesthetic techniques that were believed to enhance memorization. A post-test was utilized immediately after the intervention and the results showed that the CCC group outperformed the Flip Folder group. </em></p>

scholarly journals The Common Complications and Comorbidities among Saudi Diabetic Patients in Northern Saudi Arabia

2017 ◽  
Vol 07 (07) ◽  
pp. 151-161 ◽  
Author(s):  
Abdulrahman Khaled Alshaya ◽  
Abdulaziz Khaled Alsayegh ◽  
Hamoud Khaled Alshaya ◽  
Bassam Ahmed Almutlaq ◽  
Nshmiah S. G. Alenazi ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Diabetic Patients ◽  
The Common

scholarly journals Horticultural Classification of Citrus Cultivars

2021 ◽  
Author(s):  
Jagveer Singh ◽  
Vishal Sharma ◽  
Kuldeep Pandey ◽  
Shahnawaz Ahmed ◽  
Manveen Kaur ◽  
...  
Keyword(s):  
Natural Populations ◽  
Climatic Conditions ◽  
Poncirus Trifoliata ◽  
Citrus Fruits ◽  
The World ◽  
Major Producer ◽  
The Common

Globally, citrus fruits are grown over an area of 11.42 million ha with 179.0 million tons production. China with 82.7 m tons production is the major producer of citrus fruits followed by Brazil (18.14 m tons) and India (10.53 m tons) (FAOSTAT, 2019). All commercially used scion and rootstock cultivars belong to the genus Citrus, except kumquats, Fortunella spp., and Poncirus trifoliata, which are used as rootstock only all over the world. Worldwide citrus cultivars divided into four, reasonably-well-defined horticultural groups: the Sweet oranges, the mandarins, the grapefruits and the pummelos and the common acid members. The true or ‘biological’ citrus, including species of Citrus (C. reticulata, C. maxima and C. medica), share certain characteristics, however, these are clearly differentiated according to the morpho- taxonomic traits. Hundreds of different citrus cultivars are available. Many varieties were chance finds from natural populations, and not the product of intentional breeding efforts. Other varieties in common use have originated from planned citrus hybridization and breeding efforts from worldwide. Most of the readers will be well acquainted with the cultivated types of Citrus scion and rootstocks. This chapter provides ripening season information for worldwide, farmers/gardeners have had success with citrus in many different regions of world where tropical/subtropical climatic conditions occur.

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