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The Scarring Effects of Initial Labor Market Conditions on South Korean Nurses
Ahmed Saade,Constantinos Alexiou,Yacine Belghitar 서울대학교 경제연구소 2024 Seoul journal of economics Vol.37 No.3
Using a longitudinal dataset spanning the period 2000-2020, and an identification strategy based on instrumental variables, we examine the existence of scarring in the context of the Korean nursing profession. We find that the prevailing unemployment rate at time of graduation has negative effects on nurses’ wages that remain highly significant up to 6 years after joining the labor market, while working hours are positively scarred for up to 10 years. We also estimate a series of happiness equations to understand nurses’ experiences after joining the labor market, and find that a higher unemployment rate at time of graduation is associated with feelings of worse financial conditions, less happy lives, and lower income satisfaction.
Ahmed Abdullah Saad AL-DHUBAIBI(Ahmed Abdullah Saad AL-DHUBAIBI ) 한국유통과학회 2023 The Journal of Asian Finance, Economics and Busine Vol.10 No.1
A significant body of prior research on performance management systems (PMSs) either explains the components and the design of the systems or investigates the link between particular system/s and organizational functions, capabilities, or performance. In contrast, this study investigates the comprehensive use of PMSs and relates them to corporate financial and non-financial performance. Further, this study examines whether the association between PMSs and performance varies between industries or is moderated by the size of the company. Data was collected using a questionnaire that was sent to companies from different industries operating in Riyadh province, where the most important businesses in Saudi Arabia are located. A total of 152 usable responses were received. The results of this study revealed that companies use a variety of PMSs at a balanced level. The extent of each category of PMS use is associated with the extent of other PMS categories’ use. However, the larger the company, the more PMSs it uses. Importantly, the results showed a positive and significant association between PMSs’ extent of use and both financial and non-financial performance. This association was minimally moderated by the company size and industry for specific categories of PMSs and performance.
Robotization and Labor Supply in the Context of a Dynamic Monopsony: Novel Evidence from South Korea
Ahmed J. Saade,Constantinos Alexiou,Yacine Belghitar 서울대학교 경제연구소 2022 Seoul journal of economics Vol.35 No.3
We estimate the effects of robotization on labor supply in Manufacturing, Services and the whole of the South Korean economy using exponential hazard and a random effects logit methodologies over the period 1999-2019. Our findings suggest that a larger operational stock of industrial robots in manufacturing is associated with manufacturing (non-manufacturing) workers becoming more (less) responsive to a change in wages in their decision to quit to non-employment, whilst the ease with which firms can poach workers is found to be unaffected by robotization.
AL-DHUBAIBI, Ahmed Abdullah Saad Korea Distribution Science Association 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.6
The goal of this research is to see how closely accounting programs in Saudi Arabian colleges comply with the International Accounting Education Standards (IESs). Further, it aims to assess the level of awareness and knowledge of IESs among accounting academics and to examine the possible explanatory factors for their variation. A structured questionnaire was sent to accounting faculty members at 37 Saudi universities. Out of 541 distributed questionnaires, a total of 102 usable responses were received from 26 universities. The findings show that accounting programs in Saudi universities are partially compliant with the guidelines of IESs and accounting academics in those universities are moderately aware of IESs. High variation in the level of academics' knowledge of IESs was detected and was significantly influenced by industry work experience, academic ranks, and professional qualification. The findings of this study suggest that Saudi Universities should work closely with the local and international accounting professional bodies, i.e. the Saudi Organization for Chartered and Professional Accountants (SOCPA) and the International Federation of Accountants (IFAC) to improve accounting programs based on the guidelines of IESs to cope with the recent changes in the capital market of the kingdom and the adoption of the International Financial Reporting Standards.
Success Factors of Highway Construction Projects in Egypt: AHP Approach
El-Maaty, Ahmed Ebrahim Abu,El-Hamrawy, Saad,Akal, Ahmed Yousry Korea Institute of Construction Engineering and Ma 2016 Journal of construction engineering and project ma Vol.6 No.4
While the idea of the existence of a set of key factors for success in planning, designing and construction of projects is not new, it remains one of the most important issues in the field of construction management. This is due to project success factors are inputs to project management practice which can lead directly or indirectly to project success. This study identifies the success factors which can be used for improving the highway projects performance in Egypt during the project pre-construction and construction phases. Through a detailed literature review 35 success factors are identified. Furthermore, the AHP is adopted to prioritize the studied factors through the application of questionnaire survey. The study establishes that implementing an effective quality control and assurance systems, allow sufficient time for feasibility studies, design, drawing and tender preparation, effective cost control system and frequency of project budget updates, preparing adequate designs and drawings and determining sufficient time to implement the desired scope of work are the most important success factors for enhancing the highway projects performance in Egypt.
Ahmed, Nagwa S.,Shafik, Noha M.,Elraheem, Omar Abd,Abou-Elnoeman, Saad-Eldin A. Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.2
Background: Colorectal cancer (CRC) is a leading cause of cancer-related death. Oxidative DNA damage may contribute to cancer risk and the antioxidant paraoxonase is one endogenous free radical scavenger in the human body which could therefore exert an influeence. Purpose: Aim of this study was to determine the role of serum arylesterase (ARE) and paraoxonase 1(PON1) activities in CRC patients and to find any association between (PON1) Q192R and L55M gene polymorphisms in CRC patients. Also the serum ARE and PON1 activities in CRC patients will be investigated before and after surgery Materials and Methods: This study involved a total of 50 patients with newly diagnosed CRC and 80 healthy controls. PON1 and ARE activities were determined using an enzymatic spectrophotometric method. PON1 Q192R and L55M gene polymorphisms were determined using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) based restriction fragment analysis. The restriction enzyme AlwI was used to examine the Q192R polymorphism and Hsp92II for the L55M polymorphism. Results: Significant differences in the PON1 Q192R polymorphism were found between patients and controls. The Q allele was more frequent in the patient group than in controls, while the R allele was more frequent in the controls. Significant differences were found in the L55M polymorphism. Additionally, there were significant differences in L and M allele frequencies (p=0.001). The serum activities of PON1 and ARE were low in QQ and MM genotype. Conclusions: serum PON1 and ARE activities were significantly lower in CRC patients compared to healthy subjects. The R allele may protect against colorectal cancer.
Saad Moussa,Essam KAMEL,Ismail M. ISMAIL,Ahmed MOHAMMED 한국곤충학회 2016 Entomological Research Vol.46 No.1
A field strain of Spodoptera littoralis Biosduval was selected against Cry1C toxin derived from Bacillus thuringiensis entomocidus for 10 subsequent generations under laboratory conditions. Selection pressure resulted in a 29‐fold resistance ratio compared with the susceptible strain. Inheritance of Cry1C resistance was partially dominant and autosomal on the basis of bioassay response to Cry1C toxin in a reciprocal cross between male and/or female F1. Consistent with earlier findings, resistance was recessive at high concentrations of Cry1C toxin. However, the dominance of resistance increased as the concentration of Cry1C decreased. Analysis of survival and growth of progeny from a backcross (F1 × resistance strain) suggested that resistance was controlled by either a single or a few loci in cotton leafworm.
Enhancing the Performance of Coherent Sources SAC OCDMA Networks via Spatial Multiplexing
Ahmed M. Alhassan,Nasreen Badruddin,Naufal M. Saad,Syed A. Aljunid 한국광학회 2013 Current Optics and Photonics Vol.17 No.6
The beating of two or more lasers that have the same or a finite difference in the central frequencies,is the main source of noise in spectral amplitude coding optical code division multiple access (SACOCDMA) systems. In this paper we adopt a spatial multiplexing (SM) scheme for SAC OCDMA systemsto mitigate this beat noise. The results show that for different code weights and different data rates SMSAC can support a larger number of users than the conventional SAC for all different laser sourceconfigurations. However, SM SAC requires a more complex system than the conventional SAC, and almosttwice as much optical component.
GENERALIZED LINDLEY DISTRIBUTION USING PROPORTIONAL HAZARD FAMILY AND INFERENCE OF FAILURE TIME DATA
Ahmed AL-Adilee,Hawraa A. AL-Challabi,Hassanein Falah,Dalael Saad Abdul-Zahra 경남대학교 수학교육과 2023 Nonlinear Functional Analysis and Applications Vol.28 No.3
In this paper, we propose a generalization of Lindley distribution (GLD) via a special structure that is concern with progressively Type-II right censoring and time failure data. We study the modern properties that we have built by such combination, for example, survival function, hazard function, moments, and estimation by non-Bayesian methods. Application on some selected data related to Lindley distribution (LD) and (ED) have been employed to find out the best distribution that can fit data comparing with the GLD.