The Factors Influencing Online Ticketing Services in Airline Passengers’ Intention to Use: The Case of Tanzania

Omar Khalfan Omar 한국항공대학교 일반대학원 2023 국내석사

This study aims to investigate the factors influencing Tanzanian airline passengers' intention to use online ticketing services. The current study incorporates Technological Readiness (TR) into the Technology Acceptance Model (TAM) in the prediction of consumer intention to use. The TR model evaluates individuals' readiness to embrace and utilize online ticketing services, while the TAM model investigates the elements that influence the intention to use online ticketing services. A total of 231 respondents to the survey had their replies gathered, and the full structural equation model (SEM) was used to analyze the data. As a result, it was found that two dimensions of TR, i.e., optimism and innovativeness, were discovered to have an impact on users' intentions to use online ticketing services by influencing both perceived usefulness and perceived ease of use. On the other hand, perceived usefulness and perceived ease of use are not significantly impacted by the dimensions of discomfort and insecurity. Overall, perceived usefulness and perceived ease of use which resulted were significant in determining intention to use for individuals who are either optimistic or innovative with respect to online air ticketing services. Therefore, this study fills an important research gap in in the knowledge of influencing factors in online ticketing services to the airline industry in Tanzania and suggests that helps decision makers to enhance their marketing strategies in online ticketing services. Keywords: Technology Acceptance Model, Technology Readiness, Intention to use, Online ticketing, Airline.

Evaluation of hydrochemical characteristics and quality of groundwater in garissa county, Kenya

Omar, Said Mohamed Sungkyunkwan university 2020 국내석사

Groundwater is considered to be one of the most important renewable water source especially in water stressed areas. In Kenya, groundwater forms an integral part of the total water resources in the country although it remains under exploited. The resource is under constant threat of deterioration both in quality and quantity from natural and manmade activities. For this reason, this resource should be monitored and controlled on regular basis. Additionally, the reports generated from periodic monitoring of these resources are not analyzed further to provide detailed information regarding possible pollution sources, aquifer condition and hydrochemical characteristics of groundwater. The aim of this study was to understand the hydrochemical characteristics of groundwater in Garissa County and determine its suitability for drinking purposes. 33 samples from different groundwater sources were used in this study. 13 physicochemical parameters including temperature, pH, Electrical Conductivity (EC), Calcium (Ca2+), Magnesium (Mg2+), Sodium (Na+), Potassium (K+), Total Alkalinity (TA), total hardness (TH), Chloride (Cl-), Flouride (F-), Sulphate (SO42-) and bicarbonate (HCO3-) were analyzed to realize the objectives of the study. Hydrochemical modelling by Visual MINTEQ and graphical analysis in addition to multivariate statistical methods were used to understand the characteristics and the processes influencing the chemical composition of the groundwater. These techniques are useful in water resource management. Finally, the KS/EAS (KEBS 2015) and the WHO (2017) water quality standards were used to evaluate the suitability of groundwater for drinking purposes. The results showed that the groundwater is alkaline in nature and significant number of samples fell above the recommended drinking water concentration guideline values. The abundance of major ions in the groundwater, based on their mean values are: Na+> Mg2+> Ca2+> K+ for the cations and HCO3-> Cl- > SO42-> F- for the anions. Piper diagram created by AqQA 1.5 geochemical software revealed five water types in the study area which is predominantly Na-HCO3 type (39.4%), 27.3% mixed Mg–Na–HCO3 type, 21.2% Mg–HCO3 type, 9.1% Na– Cl type and 3% Ca-HCO3 type. The major ion chemistry analysis revealed that silicate weathering, carbonate weathering, precipitation and dissolution of minerals (e.g. calcite, dolomite and halite) contribute to the chemical composition of the groundwater in the study area. Factor analysis indicated three factors, explain 79.3% of the total variance in the hydrochemical composition of groundwater in the study area. Finally, the study showed that a significant number (51%) of groundwater resources in the study area didn’t’t meet the KS/EAS (KEBS, 2015) and WHO (2017) water quality standards for drinking water. The studied water had concentrations of Na+ (45.5%), F- (21.2%), Cl- (15.2%) and EC (12%) above the recommended guideline values making these water unsuitable for drinking purpose without prior treatment.

Customizable Interfaces : users’ perception on customizable interactive elements inside a human vehicle interaction context

Omar Contreras García Sungkyunkwan University 2013 국내석사

Nowadays many important car manufacturing companies are working with the purpose of changing the problem of urban transportation using autonomous vehicles. The reasons vary from mobility problems to the ecological issues brought by contamination. However the introduction of new mobility systems in the society is not only a matter of developing the technology for making the vehicle more autonomous, intelligent and capable. For now autonomous vehicles are capable of performing the most basic operations but their relationship with humans is still a vague consideration. Because all the possibilities and the benefits that can be obtained from a remarkable user experience, customizable interfaces seem to be a relevant improvement to create a better perception on usefulness, ease of use and intention of use in the Human Vehicle Interaction Field.

골 재생을 위한 세라믹 - 하이드로 겔 기반 하이브리드 시스템 지지체의 설계 및 평가

Omar, Faruq Soonchunhyang University Graduate School 2018 국내석사

common biomaterials for bone regeneration. Beside ceramic materials, polymeric compound are promising biomaterials in tissue engineering application. Hydrogel are very flexible materials that allow a number of different properties to be targeted for different applications through that allow a different properties to be targeted for different applications, through appropriate chemical modifications. The combination of hydrogel to ceramic scaffold may overcome the existing problem as well as enhance bone formation. These materials are primarily used for helping the bone remodeling process of natural bone providing a scaffolding, intermediary mechanical support for the damaged bone and stimulating the natural regeneration process by bringing in different growth factors and stimulant and drugs. The most important morphological feature of these hybrid scaffolds is the interconnected porosity for optimal three dimensional formations. In this work, we develop a hydrogel system together with ceramic for subsequent development of bone substitute. This hybrid system has different pore size and frame thickness .All the materials showed superior biocompatibility and excellent mechanical properties. The hydrogel system also applied to injectable PMMA bone cement with better setting properties and slightly better biocompatibility. In all the materials the properties like comprehensive strength porosity characteristic frame thickness dimension, setting time etc. were measured. For the compatibility evaluation extensive in vitro investigation like MTT, cell morphology observation, cell proliferation behavior investigation was performed. For more detailed in vivo investigation was carried out by rabbit implantation for the evaluation of in physiological environment and the results showed promising performance for the hybrid ceramic-hydrogel system. Over the past few decades, bone related disorders have constantly increased. Among all pathological conditions, bone damage is one of the most common and often leads to bone fractures. This is a massive burden and it affects most of the people all over world. Furthermore, as the population ages, numbers are due to increase. To encounter the bone loss, novel biomaterials for bone fracture regeneration are constantly under development. Typically, these materials aim at favoring optimal bone integration in the scaffold, up to complete bone regeneration; this approach to regenerative medicine is also known as tissue engineering (TE). Ceramic based calcium phosphates are among the most

ALGIERS AIR QUALITY : VARIATION AND TREND OF AIR POLLUTANTS FROM 2002 TO 2009 = ALGIERS AIR QUALITY

Omar, Guemraoui 경북대학교 대학원 2011 국내석사

특정 장소에 대한 제한들이 우리에게 그것을 더 잘 이해할 수 있는 열쇠들을 준다고 해도, 현실의 비전을 가지고, 다음에는 필요하다면 같은 현실에 개입하기 시작하라. 본 논문에서는 알제리의 대기 관측을 담당하는 기관(SAMASAFIA)에서 발표한 알제시의 2002년 ~ 2009년 사이 대기 관련 자료의 유용한 활용을 위해 분석작업과 조사를 하였다. 첫 단계로 분석의 타당성을 확보하기 위해서 효용률이 50% 이상인 데이터만 산출하는 작업을 수행하였다. 이 과정에서 다음의 성분이 대기분석에 많은 영향을 미치는 것을 확인하였다: 일산화탄소 (CO), 이산화질소 (NO, NO2, NOX), 이산화황 (SO2), 오존 (O3) 그리고 대기 중 부유물질. 이 성분들을 시공간적으로 분포시킴으로써, 어떤 오염원이 규정치 이상으로 검출되어 알제시의 공기질(Air Quality)에 심각한 영향을 주었는지 확인하였다. 또한 이 결과로부터 수년에 걸쳐 집중되어 발생하기 시작한 오염원들을 확인하였다. 최종적으로 이상의 결과를 종합하여 알제시의 대기 오염원의 출처와 원인을 분석하였다. 마지막으로 알제리와 프랑스의 대기환경 변화의 경향을 차이점을 제시하였다. Have a vision of the reality, even if limits to a specific location, will give us the keys to understand it better, and subsequently begin to intervene, if necessary, on the same reality. That is what this study has the ambition to do. In fact, through the data of the air quality of the city of Algiers, collected during the period 2002-2009 by the Algerian agency in charge of air pollution monitoring (SAMASAFIA), analytical work and survey were conducted to derive maximum interpretations to these data. In a first step, it was preceded to a refinement, by considering only the data which brought a sufficient rate of availability (more than 50 %) for an acceptable analysis. From this, it has been kept for exploring the elements: Carbon Monoxide (CO), Nitrogen Oxides (NO, NO2, NOX), Sulfur Dioxide (SO2), Ozone (O3) and Suspended Particulate Matter (SPM). The results of the spatiotemporal distribution of each element were allowed to see and to notice which pollutants represent a severe problem to the air quality in the city of Algiers and which pollutants had exceeded the limit values according to the Algerian regulations. Also the results showed the tendency of the pollutants concentrations through years. These results allowed understanding and specifying the origins and sources of these pollutants in the city of Algiers. It was shown in the end the difference between the Algerian tendencies and those of France.

THE EFFECT OF AEROSOLS ON RADIATIVE TRANSFER AND THE OPTICAL PROPERTIES OF THE ATMOSPHERE (SULFATES, SOOT)

OMAR, ALI HASSAN UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN. 1997 해외박사

Performance analysis of horizontal axis wind turbine rotor blades : 수평차 회전익의 성능 해석

Omar, Ashraf Ali 서울대학교 대학원 1994 국내박사

Transient Thermal-Hydraulic Analysis for the Downward Flow MTR Research Reactors

OMAR SHARIEF IBRAHIM ALYAHIA University of Science and Technology (UST) 2014 국내석사

A neutron kinetic and thermal hydraulic coupling model is developed to analyze the transient behavior for downward core cooling plate-type fuel research reactors. The model is developed to simulate the flow inversion phenomenon under Loss of Flow Accident (LOFA). A spatial-dependent thermal hydraulic technique is adopted for a narrow rectangular channel. The local thermal hydraulic parameters and hotspot location during flow inversion are analyzed. A new methodology is developed to determine the flow rate through the channel in terms of a balance between driving and preventing forces. Friction and buoyancy forces act as resistance of the flow before a flow inversion while buoyancy force becomes the driving force after a flow inversion. By taking the buoyancy effect into account to determine the flow rate, the difference in the flow inversion time between hot and average channels is investigated: flow inversion occurs earlier in the hot channel than in an average channel. Furthermore, single-phase heat transfer characteristics in a narrow rectangular channel are experimentally investigated for upward and downward flow. The study emphasize on the entrance effect on the convective heat transfer coefficient. The experimental data are compared with the existing correlations. The comparison shows some differences from others. Therefore, a new set of single phase heat transfer correlations is proposed for laminar and turbulent flow. The new correlations are taken the entrance effect into consideration, and they have very good agreement with the experimental data. The correlation proposed in the present study for turbulent and laminar flows has errors of ±19.5 and ±22.0 %, respectively. The developed model is used to simulate a 10 MW MTR IAEA benchmark research reactor during fast and slow LOFA. The evolution of the reactor parameters which obtained from the present model are compared with the analysis conducted using different codes done by various institutes. The comparison shows good agreement. The results show the first and second peak for the coolant, and cladding temperature during SLOFA and FLOFA, as well as the flow inversion time. Furthermore, the movement of the hotspot location before and after flow inversion is investigated for a SLOFA and FLOFA. In this work, A 5 MW open-pool plate type fuel research reactor is simulated during Loss of Electric Power. The reactor is conducted the downward force convection cooling during normal operation, and upward natural convection cooling during shutdown and training operation mode. The reactor parameters during the transient behavior are investigated. In addition, the flap valves opening time is calculated. The difference in the flow inversion time between hot and average channels is investigated: a flow inversion occurs earlier in the hot channel than in an average channel. The results are compared with the analysis done by RELAP5.

A Study of Analyzing the New Egyptian Administrative Capital City

Wael Omar Ahmed 서울시립대학교 2017 국내석사

이집트에서 수도이자 대도시로서 카이로가 갖는 중요성은 오랜 역사적 배경을 지닌다. 최근 수십 년 간 카이로는 모든 국가 수준 활동에 있어 핵심적 역할을 수행해 대도시로 부상했을 뿐 아니라 빠른 도시화와 도시 활동의 집중과 관련된 다수의 문제가 생겨났다. 이집트 정부는 최근 수도인 카이로의 만성적인 경제적, 사회적, 환경 문제를 극복하기 위해 중앙정부의 기능을 하는 새로운 행정도시를 개발하기로 결정했다. 본 연구는 제안된 새로운 행정도시를 평가하고자 한다. 본 연구에서는 이를 위해 신수도 도입 결정 이면의 요인들과 이론적 지속가능성 기준을 다뤘으며, 나아가 한국과 말레이시아 사례를 상세히 조사하는 등 8개의 국가의 실제 경험을 평가했다. 이 국가들의 경험과 데이터를 기준으로 문제의 다양한 측면을 조사했으며, 특히 이전의 이유와 기본계획의 골자를 조사했다. 이후 계획의 장단점이 파악 및 논의되었다. 연구를 위해 도시 및 지역개발 분야의 이집트 전문가들을 인터뷰해 이슈에 대한 더 나은 통찰력을 얻고자 했다. 연구 결과 제안된 수도 입지가 균형 지역개발과 입지 관점에 적절하지 않은 것으로 밝혀졌다. 또한 국가보안 우려 및 경제적 이유가 논란의 여지가 있는 것으로 나타났다. 이와 같은 결과에 기반하여 다수의 제언이 도출되었다. 먼저 정부 부처, 대사관, 정부 기관이 엄격한 일정에 맞춰 전환되어야 한다. 둘째로 바드르와 뉴카이로 시의 추가적 확장이 개편되어 서로 공간적으로 병합되는 일이 없어야 한다. 셋째, 주요 축이 되는 도로의 대기오염을 맵핑하기 위해 현장 표본조사가 시행되어야 한다. In Egypt, the importance of Cairo as the capital and the primate city has a long historical background. In recent decades, the centrality of Cairo for all kinds of national level activities has not only turned it into a mega city but also created a number of problems usually associated with rapid urbanization and concentration of urban activities. Recently, the Egyptian government has decided to establish a new administrative capital city for the central government’s functions in order to overcome various economic, social and environmental problems besetting the capital city of Cairo. The study aims to evaluate the proposed new administrative capital city. For this purpose, theoretical basis of sustainability and the factors behind the decision for creating a new capital city has been discussed. Furthermore, practical experiences of eight different countries have been reviewed with detailed examination of the cases of Korea and Malaysia. In the light of the experience of these countries and on the basis of data, various aspects of the issue have been examined, especially the reasons for shifting, and the broad outlines of the master plan. After that advantages and shortcomings of the plan have been identified and discussed. For the purposes of the study, Egyptian experts in the field of urban and regional development have also been interviewed in order to gain better insights into the issue.   The study has found that the site for the proposed capital is not suitable from the perspectives of location and balanced regional development. Also, the national security concern and the economic reasons have been found controversial. Based on these findings, a number of recommendations have been made. Firstly, the shifting of the executive ministries, embassies, and the governmental institutions needs to be ensured within a strict timetable. Secondly, further expansion of Badr and New Cairo cities needs to be revised to prevent their spatial agglomeration with each other. Thirdly, Incentives should be put in place to encourage public servants to relocate their household there, such as; in case if this public servants already owns a home in Cairo City, an official committee including a private real estate valuation offices may be deputed to evaluate each housing unite and decide if the owner deserves compensation or should pay the difference in price by monthly or annual payments.

Reasons for Using Social Networking Sites Technology as a Resource of Methods of Teaching English Language and Students Academic Self-Efficacy : 영어교육장면에서의 SNS 활용동기와 학업적 자기효능감의 관계

Alyaa Omar Almarwaey 강원대학교 대학원 2013 국내석사

이 연구는 영어교육을 전공하는 대학생들이 SNS를 학습의 과정에서 사용하는 이유들을 탐색하고, 그러한 이유들이 학업에 대한 자기효능감과 어떠한 관련성을 가지는지를 확인할 목적으로 수행되었다. 사우디아라비아의 Makkah에 소재한 Umm AL-Qura대학의 286명의 대학생들이 연구에 참여하였다. 주요 연구결과를 제시하면, SNS에 대한 친숙도에서 남녀간에 의의있는 차이가 없었으며, SNS 사용수준과 학업적 자기효능감수준 간에 의의 있는 정적 상관이 발견되었다. 회귀분석결과, SNS의 비학문적 사용동기는 학생들의 학업적 자기효능감에 정적 효과를 보인 반면, 학문적 사용동기는 의의 있는 효과를 보이지 않았다. 이 결과는 비학문적인 동기이기는 하지만 일상생활에서의 SNS의 수준이 높을수록 학생들의 학업적 자기효능감이 높아진다는 것을 의미하는 것이다. 따라서 학생들의 학업적 자기효능감을 제고하기 위한 일환으로서 일생생활에서의 자유로운 SNS사용을 권장할 필요성이 있음을 의미하는 것이다. This study aimed to explore what are the reasons that college students prefer to use SNSs in teaching English context. This investigation applies self-efficacy theory to explain how using SNSs will affect students’ beliefs. The study used questionnaire to conduct empirical research, and collected and analyzed data of 286 participants from Umm AL-Qura University in Makkah in KSA. The findings clearly reflect that there is no significant difference between female and male groups in familiarity with SNSs. There is a significant positive correlation between reasons for using SNSs and students’ academic self-efficacy. Multiple regression analysis showed only non-academic reasons for using social networking sites technology has a positive effect on the students’ academic self-efficacy. The results suggest that using SNSs in the daily life for non-academic reasons will promote students’ academic self-efficacy for informal learning purposes. As well as using SNSs in academic field with regulated learning environment may promote both effective methods of teaching and learning English language.