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Mohammed S Aldossary,1 Mateg A Alahmary,1 Mashael M Almutawaa,2 Shahad M Alhajri,1 Abdulrahman O Almalki,3 Khalid A Alharbi,3 Afnan M Almuaddi,1 Mervat M El Dalatony1,4 1General Directorate of Research and Studies, Ministry of Health, Riyadh, Saudi Arabia; 2Department of Prosthodontics, Vision Colleges, Riyadh, Saudi Arabia; 3General Directorate of Patient Experience Center, Ministry of Health, Riyadh, Saudi Arabia; 4Public Health & Community Medicine Department, Faculty of Medicine, Menoufia University, Shibin El Kom, Menoufia Governorate, EgyptCorrespondence: Mohammed S Aldossary, General Directorate of Research and Studies, Ministry of Health, Tower 2, P.C. 12382, Alnakheel District, Digital City, Riyadh, Saudi Arabia, Tel +966-11-2124000, Email msaldossary@moh.gov.saBackground: Patient satisfaction is crucial for assessing healthcare quality and identifying strengths and weaknesses in healthcare organizations. In Saudi Arabia, the Ministry of Health (MOH) implemented the Patient Experience Measurement Program to enhance patient experience and healthcare quality. This study aimed to identify specific aspects of patient satisfaction with dental visits in Saudi Arabia to improve dental care quality and inform dental services development.Methods: The study used a standardized self-administered questionnaire (Health Links/Press Ganey) and analyzed surveys from patients who visited MOH-specialized dental clinics in Saudi Arabia during the first half of 2022. The dental section comprised 20 questions across five domains, with patients rating their experience on a 5-point Likert scale. Statistical analysis was performed using IBM SPSS Statistics 25.Results: A total of 964 patients were surveyed. The overall patient satisfaction with dental settings was 3.61 out of 5.0 (72.2%). The highest satisfaction score was for personal issues with the dental clinic domain (3.93/5; 78.6%), while the least satisfaction score was for access to the dental clinic domain (3.29/5; 65.

Alruwaili NK, Zafar A, Imam SS, et al. Int J Nanomedicine. 2020;15:4717–4737. The Editor and Publisher of International Journal of Nanomedicine wish to retract the published article. Concerns were raised regarding the alleged duplication of isotonicity images in Figure 8. The corresponding author did cooperate with the investigation and images relating to the isontonicity study were provided. However, despite the authors’ assistance, it was still not clear how the images came to be duplicated, and, as we cannot verify the validity of the published work, we are therefore retracting the article. The authors have been informed and do not agree with this decision. We have been informed in our decision-making by our policy on publishing ethics and integrity and the COPE guidelines on retractions. The retracted article will remain online to maintain the scholarly record, but it will be digitally watermarked on each page as “Retracted”.

BackgroundThe acceptance of vaccination against COVID-19 among parents of young children plays a significant role in controlling the current pandemic. A wide range of factors that influence vaccine hesitancy in adults has been reported worldwide, but less attention has been given to COVID-19 vaccination among children. Vaccine hesitancy is considered a major challenge in achieving herd immunity, and it is more challenging among parents as they remain deeply concerned about their child's health. In this context, a systematic review of the current literature is inevitable to assess vaccine hesitancy among parents of young children to ensure a successful ongoing vaccination program.MethodA systematic search of peer-reviewed English literature indexed in Google Scholar, PubMed, Embase, and Web of science was performed using developed keywords between 1 January 2020 and August 2022. This systematic review included only those studies that focused on parental concerns about COVID-19 vaccines in children up to 12 years without a diagnosis of COVID-19. Following PRISMA guidelines, a total of 108 studies were included. The quality appraisal of the study was performed by Newcastle-Ottawa Scale (NOS).ResultsThe results of 108 studies depict that vaccine hesitancy rates differed globally with a considerably large number of factors associated with it. The highest vaccine hesitancy rates among parents were reported in a study from the USA (86.1%) and two studies from Saudi Arabia (> 85%) and Turkey (89.6%). Conversely, the lowest vaccine hesitancy rates ranging from 0.69 and 2% were found in two studies from South Africa and Switzerland, respectively. The largest study (n = 227,740) was conducted in Switzerland while the smallest sample size (n = 12) was represented by a study conducted in the USA. The most commonly reported barriers to childhood vaccination were mothers' lower education level (N = 46/108, 43%), followed by financial instability (N = 19/108, 18%), low confidenc

BackgroundThe acceptance of vaccination against COVID-19 among parents of young children plays a significant role in controlling the current pandemic. A wide range of factors that influence vaccine hesitancy in adults has been reported worldwide, but less attention has been given to COVID-19 vaccination among children. Vaccine hesitancy is considered a major challenge in achieving herd immunity, and it is more challenging among parents as they remain deeply concerned about their child's health. In this context, a systematic review of the current literature is inevitable to assess vaccine hesitancy among parents of young children to ensure a successful ongoing vaccination program.MethodA systematic search of peer-reviewed English literature indexed in Google Scholar, PubMed, Embase, and Web of science was performed using developed keywords between 1 January 2020 and August 2022. This systematic review included only those studies that focused on parental concerns about COVID-19 vaccines in children up to 12 years without a diagnosis of COVID-19. Following PRISMA guidelines, a total of 108 studies were included. The quality appraisal of the study was performed by Newcastle-Ottawa Scale (NOS).ResultsThe results of 108 studies depict that vaccine hesitancy rates differed globally with a considerably large number of factors associated with it. The highest vaccine hesitancy rates among parents were reported in a study from the USA (86.1%) and two studies from Saudi Arabia (> 85%) and Turkey (89.6%). Conversely, the lowest vaccine hesitancy rates ranging from 0.69 and 2% were found in two studies from South Africa and Switzerland, respectively. The largest study (n = 227,740) was conducted in Switzerland while the smallest sample size (n = 12) was represented by a study conducted in the USA. The most commonly reported barriers to childhood vaccination were mothers' lower education level (N = 46/108, 43%), followed by financial instability (N = 19/108, 18%), low confidenc

BackgroundThe acceptance of vaccination against COVID-19 among parents of young children plays a significant role in controlling the current pandemic. A wide range of factors that influence vaccine hesitancy in adults has been reported worldwide, but less attention has been given to COVID-19 vaccination among children. Vaccine hesitancy is considered a major challenge in achieving herd immunity, and it is more challenging among parents as they remain deeply concerned about their child's health. In this context, a systematic review of the current literature is inevitable to assess vaccine hesitancy among parents of young children to ensure a successful ongoing vaccination program.MethodA systematic search of peer-reviewed English literature indexed in Google Scholar, PubMed, Embase, and Web of science was performed using developed keywords between 1 January 2020 and August 2022. This systematic review included only those studies that focused on parental concerns about COVID-19 vaccines in children up to 12 years without a diagnosis of COVID-19. Following PRISMA guidelines, a total of 108 studies were included. The quality appraisal of the study was performed by Newcastle-Ottawa Scale (NOS).ResultsThe results of 108 studies depict that vaccine hesitancy rates differed globally with a considerably large number of factors associated with it. The highest vaccine hesitancy rates among parents were reported in a study from the USA (86.1%) and two studies from Saudi Arabia (> 85%) and Turkey (89.6%). Conversely, the lowest vaccine hesitancy rates ranging from 0.69 and 2% were found in two studies from South Africa and Switzerland, respectively. The largest study (n = 227,740) was conducted in Switzerland while the smallest sample size (n = 12) was represented by a study conducted in the USA. The most commonly reported barriers to childhood vaccination were mothers' lower education level (N = 46/108, 43%), followed by financial instability (N = 19/108, 18%), low confidenc

BackgroundThe acceptance of vaccination against COVID-19 among parents of young children plays a significant role in controlling the current pandemic. A wide range of factors that influence vaccine hesitancy in adults has been reported worldwide, but less attention has been given to COVID-19 vaccination among children. Vaccine hesitancy is considered a major challenge in achieving herd immunity, and it is more challenging among parents as they remain deeply concerned about their child's health. In this context, a systematic review of the current literature is inevitable to assess vaccine hesitancy among parents of young children to ensure a successful ongoing vaccination program.MethodA systematic search of peer-reviewed English literature indexed in Google Scholar, PubMed, Embase, and Web of science was performed using developed keywords between 1 January 2020 and August 2022. This systematic review included only those studies that focused on parental concerns about COVID-19 vaccines in children up to 12 years without a diagnosis of COVID-19. Following PRISMA guidelines, a total of 108 studies were included. The quality appraisal of the study was performed by Newcastle-Ottawa Scale (NOS).ResultsThe results of 108 studies depict that vaccine hesitancy rates differed globally with a considerably large number of factors associated with it. The highest vaccine hesitancy rates among parents were reported in a study from the USA (86.1%) and two studies from Saudi Arabia (> 85%) and Turkey (89.6%). Conversely, the lowest vaccine hesitancy rates ranging from 0.69 and 2% were found in two studies from South Africa and Switzerland, respectively. The largest study (n = 227,740) was conducted in Switzerland while the smallest sample size (n = 12) was represented by a study conducted in the USA. The most commonly reported barriers to childhood vaccination were mothers' lower education level (N = 46/108, 43%), followed by financial instability (N = 19/108, 18%), low confidenc

BackgroundThe acceptance of vaccination against COVID-19 among parents of young children plays a significant role in controlling the current pandemic. A wide range of factors that influence vaccine hesitancy in adults has been reported worldwide, but less attention has been given to COVID-19 vaccination among children. Vaccine hesitancy is considered a major challenge in achieving herd immunity, and it is more challenging among parents as they remain deeply concerned about their child's health. In this context, a systematic review of the current literature is inevitable to assess vaccine hesitancy among parents of young children to ensure a successful ongoing vaccination program.MethodA systematic search of peer-reviewed English literature indexed in Google Scholar, PubMed, Embase, and Web of science was performed using developed keywords between 1 January 2020 and August 2022. This systematic review included only those studies that focused on parental concerns about COVID-19 vaccines in children up to 12 years without a diagnosis of COVID-19. Following PRISMA guidelines, a total of 108 studies were included. The quality appraisal of the study was performed by Newcastle-Ottawa Scale (NOS).ResultsThe results of 108 studies depict that vaccine hesitancy rates differed globally with a considerably large number of factors associated with it. The highest vaccine hesitancy rates among parents were reported in a study from the USA (86.1%) and two studies from Saudi Arabia (> 85%) and Turkey (89.6%). Conversely, the lowest vaccine hesitancy rates ranging from 0.69 and 2% were found in two studies from South Africa and Switzerland, respectively. The largest study (n = 227,740) was conducted in Switzerland while the smallest sample size (n = 12) was represented by a study conducted in the USA. The most commonly reported barriers to childhood vaccination were mothers' lower education level (N = 46/108, 43%), followed by financial instability (N = 19/108, 18%), low confidenc

Orthogonal spin ordering is rarely observed in magnetic oxides because nearest-neighbor symmetric Heisenberg superexchange interactions usually dominate. We have discovered that in the quadruple perovskite CaFe₃Ti₄O₁₂, where only the S = 2 Fe²⁺ ion is magnetic, long-range magnetic order consisting of an unusual arrangement of three interpenetrating orthogonal sublattices is stabilized. Each magnetic sublattice corresponds to a set of FeO₄ square planes sharing a common orientation. This multi-k magnetic spin ordering is the result of fourth-neighbor spin couplings with a strong easy-axis anisotropy. In an applied magnetic field, each sublattice tends towards ferromagnetic alignment, but remains polarized by internal magnetic fields generated by the others, thus stabilizing in a noncollinear canted ferromagnetic structure. CaFe₃Ti₄O₁₂ provides a rare example of how nontrivial long-range spin order can arise when near-neighbor Heisenberg superexchange is quenched.

Nuclear factor-kappa B, involved in inflammation, host immune response, cell adhesion, growth signals, cell proliferation, cell differentiation, and apoptosis defense, is a dimeric transcription factor. Inflammation is a key component of many common respiratory disorders, including asthma, chronic obstructive pulmonary disease (COPD), bronchiectasis, and acute respiratory distress syndrome. Many basic transcription factors are found in NF-xB signaling, which is a member of the Rel protein family. Five members of this family c-REL, NF-xB2 (p100/ p52), RelA (p65), NF-xB1 (p105/p50), RelB, and RelA (p65) produce 5 transcriptionally active molecules. Proinflammatory cytokines, T lymphocyte, and B lymphocyte cell mitogens, lipopolysaccharides, bacteria, viral proteins, viruses, double-stranded RNA, oxidative stress, physical exertion, various chemotherapeutics are the stimulus responsible for NF-xB activation. NF-xB act as a principal component for several common respiratory illnesses, such as asthma, lung cancer, pulmonary fibrosis, COPD as well as infectious diseases like pneumonia, tuberculosis, COVID-19. Inflammatory lung disease, especially COVID-19, can make NF-xB a key target for drug production.

Khalid Khalaf Alharbi, Amal F Alshammary, Omar Sammar Aljabri, Imran Ali Khan Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi ArabiaCorrespondence: Imran Ali KhanDepartment of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, PO Box-10219, Riyadh, 11433, Kingdom of Saudi ArabiaTel +966501112806Fax +966114693851Email imkhan@ksu.edu.saPurpose: Limited studies have shown positive and negative associations of serum amylase A1 (SAA1) gene in childhood obesity, previously showed the relation with obesity in different ethnicity. The current study therefore investigated the impact of single nucleotide polymorphisms present in the SAA1 gene on subjects of Saudi obesity.Participants and Methods: In this case–control study, we selected 140 subjects of Saudi population and categorized them into 83 cases of obesity and 57 healthy controls. Genotyping was performed with quantitative/real time-polymerase chain reaction in the SAA1 gene for rs11603089A/G, rs4638289A/T and rs7131332A/G polymorphisms.Results: In rs11603089 polymorphism, co-dominant model (AG vs AA+GG; OR-2.23 [95% CI:1.02– 4.86]; p=0.04) and rs4638289 polymorphism, a disparity in significance was observed between the homozygous variant (TT vs AA; OR-16.8 [95% CI: 2.06– 136.8]; p=0.0009), dominant model (AT+TT vs AA; OR-2.57 [95% CI: 1.28– 5.19]; p=0.007), recessive model (TT vs AA+AT; OR-11.36 [95% CI: 1.45– 89.06]; p=0.004) and allelic frequency for (T vs A: OR-2.35 [95% CI: 1.39– 3.98]; p=0.001) between the obesity cases and control subjects. However, statistical correlations did not reveal the rs7131332A/G polymorphism either (p> 0.05).Conclusion: In conclusion, rs4638289 polymorphism was associated with risk allele and dominant model with obesity subjects. Further additional studies were warranted.Keywords: obesity, SAA1 gene, rs11603089, rs

Nabil K Alruwaili,1 Ameeduzzafar Zafar,1 Syed Sarim Imam,2 Khalid Saad Alharbi,3 Nasser Hadal Alotaibi,4 Sultan Alshehri,2,5 Nabil A Alhakamy,6 Abdulaziz I Alzarea,1 Muhammad Afzal,3 Mohammed Elmowafy1,7 1Department of Pharmaceutics, College of Pharmacy, Jouf University, Sakaka, Al-Jouf, Kingdom of Saudi Arabia; 2Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia; 3Department of Pharmacology, College of Pharmacy, Jouf University, Sakaka, Al-Jouf, Kingdom of Saudi Arabia; 4Department of Clinical Pharmacy, College of Pharmacy, Jouf University, Sakaka, Al-Jouf, Kingdom of Saudi Arabia; 5College of Pharmacy, Almaarefa University, Riyadh, Kingdom of Saudi Arabia; 6Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia; 7Department of Pharmaceutics and Ind. Pharmacy, Faculty of Pharmacy (Boys), Al-Azhar University, Nasr City, Cairo, EgyptCorrespondence: Ameeduzzafar Zafar Email zzafarpharmacian@gmail.comPurpose: The present study was designed to study the gentamycin (GTM)-loaded stimulus-responsive chitosan nanoparticles to treat bacterial conjunctivitis.Methods: GTM-loaded chitosan nanoparticles (GTM-CHNPs) were prepared by ionotropic gelation method and further optimized by 3-factor and 3-level Box–Behnken design. Chitosan (A), sodium tripolyphosphate (B), and stirring speed (C) were selected as independent variables. Their effects were observed on particle size (PS as Y1), entrapment efficiency (EE as Y2), and loading capacity (LC as Y3).Results: The optimized formulation showed the particle size, entrapment efficiency, and loading capacity of 135.2± 3.24 nm, 60.18± 1.65%, and 34.19± 1.17%, respectively. The optimized gentamycin-loaded chitosan nanoparticle (GTM-CHNPopt) was further converted to the stimulus-responsive sol-gel system (using pH-sensitive carbopol 974P). GTM-CHNPopt sol-gel (NSG5) exhibited good gelling str

This paper has been retracted. Alruwaili NK, Zafar A, Imam SS, et al. Int J Nanomedicine. 2020;15:4717–4737. The Editor and Publisher of International Journal of Nanomedicine wish to retract the published article. Concerns were raised regarding the alleged duplication of isotonicity images in Figure 8. The corresponding author did cooperate with the investigation and images relating to the isontonicity study were provided. However, despite the authors’ assistance, it was still not clear how the images came to be duplicated, and, as we cannot verify the validity of the published work, we are therefore retracting the article. The authors have been informed and do not agree with this decision. We have been informed in our decision-making by our policy on publishing ethics and integrity and the COPE guidelines on retractions. The retracted article will remain online to maintain the scholarly record, but it will be digitally watermarked on each page as “Retracted”.

Mohammad M Al-Sanea,1 Lizaveta Gotina,2 Mamdouh FA Mohamed,3 Della Grace Thomas Parambi,1 Hesham A M Gomaa,4,5 Bijo Mathew,6 Bahaa G M Youssif,7 Khalid Saad Alharbi,8 Zainab M Elsayed,9 Mohamed A Abdelgawad,1,10 Wagdy M Eldehna9,11 1Department of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Sakaka, Aljouf 2014, Saudi Arabia; 2Division of Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology (UST), Daejeon, Korea; 3Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Sohag University, Sohag 82524, Egypt; 4Department of Pharmacology, College of Pharmacy, Jouf University, Sakaka, Aljouf 2014, Saudi Arabia; 5Department of Biochemistry, Faculty of Pharmacy, Nahda University, Beni-Suef, Egypt; 6Division of Drug Design and Medicinal Chemistry Research Lab, Department of Pharmaceutical Chemistry, Ahalia School of Pharmacy, Palakkad, Kerala 678557, India; 7Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt; 8Department of Pharmacology, College of Pharmacy, Jouf University, Sakakah 72341, Saudi Arabia; 9Scientific Research and Innovation Support Unit, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, Egypt; 10Department of Pharmaceutical Organic Chemistry, Beni-Suef University, Beni-Suef 62514, Egypt; 11Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, EgyptCorrespondence: Mohammad M Al-SaneaDepartment of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Sakaka, Aljouf 2014, Saudi ArabiaTel +966 594076460Email mmalsanea@ju.edu.saIntroduction: Histone deacetylases (HDACs) represent one of the most validated cancer targets. The inhibition of HDACs has been proven to be a successful strategy for the development of novel anticancer candidates.Methods: This work describes design and synthesis of a new set of HDAC inhibitors ( 7a-c and 8a, b) utilizing ligustrazine as a novel cap moi

Background: Health literacy is an essential predictor of health status, disease control and adherence to medications. Objectives: The study goals were to assess the health literacy level of the general population in Saudi Arabia using translated Gulf Arabic version of the short-version of the Test of Functional Health Literacy in Adults (S-TOFHLA) and Single Item Literacy Screener (SILS) tests and to measure the relationship between health literacy and education level. Methods: The study was a cross-sectional with a convenience sample of 123 participants from the general population in Riyadh. Data were collected using the modified (Gulf) Arabic versions of both S-TOFHLA and SILS. Fisher’s Exact test was used to measure the difference of the health literacy scores according to the education degrees and Cronbach’s alpha was used to measure the internal consistency of the S-TOFHLA items. Results: More than half (55.4%) of the participants were male, 50.4% had a middle school or less education level, and we found that 84.4% had adequate health literacy as measured by the S-TOFHLA, compared to 49.6% as measured by SILS. The Fisher’s Exact test showed a significant difference (P<.05) in the S-TOFHLA and SILS scores according to education categories. Conclusions: The level of education has a significant positive association with S-TOFHLA and SILS results. The Gulf Arabic version of S-TOFHLA is a reliable test with a good internal consistency and a significant positive correlation between the two parts of S-TOFHLA. We recommend the use of S-TOFHLA or SILS at the first patient visit.

The Path-Goal Theory is strongly referred to as one of the main organisational subjects of leadership styles in human resources literature. The theory proposes four leadership behaviors that are directive, supportive, participative, and achievement-oriented. In addition, the primary premise of the theory is to predict leadership effectiveness in maximizing employee attitude and performance in different situations. Nevertheless, several deficiencies have been identified in the literature which require further development such as understanding the underlying mechanisms and the boundary conditions of leadership effects. Building on the Path-Goal Theory and the Social Identity Theory, the general objective of this study is to examine the effects of leadership styles on employee affective commitment and performance directly and through the mediating effect of organisational identification, as well as the moderating effect of job security in the context of Saudi Airlines in Saudi Arabia. This is motivated by the fact that Saudi Airlines faces an ongoing internal organisational and external environmental changes, and therefore, the role of organisational identification and job security is relevant. This quantitative study utilized a stratified random sampling technique and used a sample of 353 respondents from the company headquarter, as well as the four international airports of Saudi Arabia (Jeddah, Riyadh, Dammam, and Medina). In addition, the collected data were analyzed using the partial least squares technique to achieve the study findings. In general, these findings revealed that the behaviors of leaders at Saudi Airlines were major determinants of the Path-Goal Theory’s role on subordinates’ attitudes and behavior. It was confirmed that there are significant relationships between leadership styles and the studied outcomes, as well as significant mediating and moderating effects of organisational identification and job security respectively. In specific, the results

The Path-Goal Theory is strongly referred to as one of the main organisational subjects of leadership styles in human resources literature. The theory proposes four leadership behaviors that are directive, supportive, participative, and achievement-oriented. In addition, the primary premise of the theory is to predict leadership effectiveness in maximizing employee attitude and performance in different situations. Nevertheless, several deficiencies have been identified in the literature which require further development such as understanding the underlying mechanisms and the boundary conditions of leadership effects. Building on the Path-Goal Theory and the Social Identity Theory, the general objective of this study is to examine the effects of leadership styles on employee affective commitment and performance directly and through the mediating effect of organisational identification, as well as the moderating effect of job security in the context of Saudi Airlines in Saudi Arabia. This is motivated by the fact that Saudi Airlines faces an ongoing internal organisational and external environmental changes, and therefore, the role of organisational identification and job security is relevant. This quantitative study utilized a stratified random sampling technique and used a sample of 353 respondents from the company headquarter, as well as the four international airports of Saudi Arabia (Jeddah, Riyadh, Dammam, and Medina). In addition, the collected data were analyzed using the partial least squares technique to achieve the study findings. In general, these findings revealed that the behaviors of leaders at Saudi Airlines were major determinants of the Path-Goal Theory’s role on subordinates’ attitudes and behavior. It was confirmed that there are significant relationships between leadership styles and the studied outcomes, as well as significant mediating and moderating effects of organisational identification and job security respectively. In specific, the results

Hamza Mohammad Abdulghani,1 Areej Salman AlRajeh,2 Budoor Hussain AlSalman,2 Lulwah Sami AlTurki,2 Norah Sulaiman AlNajashi,2 Mohammad Irshad,2 Khalid Hamad Alharbi,3 Yazeed Eid AlBalawi,3 Yazeed A AlSuliman,3 Tauseef Ahmad2 1Department of Medical Education, College of Medicine, King Saud University, 2College of Medicine, King Saud University, 3King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia Background: Diabetes mellitus with comorbid complications constitute a major public health problem worldwide. The aim of this study was to evaluate the risk of comorbid complications with glycosylated hemoglobin levels and diabetes duration. Also assessed were patients’ diabetic foot-care knowledge and practices. Patients and methods: This was a quasiexperimental study. A total of 360 type 2 diabetes mellitus patients were interviewed at a government health care center in Riyadh, Saudi Arabia. Diabetic complications and HbA1c-level data were collected from hospital records. A standard questionnaire was used to assess their diabetic foot-care knowledge and practice. Results: Of the type 2 diabetes mellitus patients, 32.5% had highly uncontrolled glycosylated hemoglobin (HbA1c) levels (≥8.6%) and 62.8% had had diabetes >10 years. The patients had comorbid complications, such as hypertension (61.4%), dyslipidemia (58.6%), retinopathy (23.3%), heart disease (14.4%), and severe foot complications (3.9%). The majority of highly uncontrolled HbA1c-level patients had retinopathy (OR 8.90, P=0.0001), foot complications (OR 8.09, P=0.0001), dyslipidemia (OR 2.81, P=0.010), and hypertension (OR 2.0, P=0.028) compared to the controlled HbA1c-level (<7%) group. Patients with diabetes >10 years also had higher prevalence of foot complications (OR 2.92, P=0.0001), retinopathy (OR 2.17, P=0.011), and hypertension (OR 1.67, P=0.033). From patient responses, physicians examined only 34.2% of patient feet and 36.7% of patients recei

This case involved a 36-year-old adult male who presented with an unusual inguinal hernia in which the uterus and fallopian tubes were identified as contents of the inguinal hernia sac. These findings reflected a rare autosomal recessive developmental syndrome known as PMDS (persistent Mí¼llerian duct syndrome). The diagnosis was established and confirmed via radiological-mainly MRI-investigation.

This study aimed to investigate the moderating impact of organizational climate on the Total Quality Management (TQM) organizational sustainability relationship in the context of the Saudi hotel industry firms. It also aimed to examine the direct relationship between TQM and organizational sustainability. The sample of the study consisted of 204 middle managers working in 932 hotels located in five Saudi cities namely Mecca, Madinah, Riyadh, Jeddah and the Eastern Province. After collection, data was analyzed with the help of Partial Least Squares (PLS) structural equation modeling. Based on the obtained analysis results, a positive and significant relationship was found between TQM and organizational sustainability indicating support for H1 and a positive and significant moderating effect exists from organizational climate on the relationship between TQM and organizational sustainability in the context of the Saudi hotel industry firms. Some suggestions for the further extension of the study were provided at the end.

This case involved a 36-year-old adult male who presented with an unusual inguinal hernia in which the uterus and fallopian tubes were identified as contents of the inguinal hernia sac. These findings reflected a rare autosomal recessive developmental syndrome known as PMDS (persistent Mí¼llerian duct syndrome). The diagnosis was established and confirmed via radiological-mainly MRI-investigation.

The notion that leadership styles could be a source for organizational identification have caught attention by human resource management and organizational behaviour scholars in recent years. Leadership is one of the most complex and widely studied construct in organizational studies. The purpose of this paper is to review the impact of leadership styles on employee organizational identification. Theoretical and empirical studies were reviewed and summarized. The review revealed that the general link of leadership-organizational identification has been widely accepted, and most studies focus on transformational leadership, while other leadership styles should be considered.

The notion that leadership styles could be a source for organizational identification have caught attention by human resource management and organizational behaviour scholars in recent years. Leadership is one of the most complex and widely studied construct in organizational studies. The purpose of this paper is to review the impact of leadership styles on employee organizational identification. Theoretical and empirical studies were reviewed and summarized. The review revealed that the general link of leadership-organizational identification has been widely accepted, and most studies focus on transformational leadership, while other leadership styles should be considered.

Resonant tunnelling diode (RTD) is known to be the fastest electronics device that can be fabricated in compact form and operate at room temperature with potential oscillation frequency up to 2.5 THz. The RTD device consists of a narrow band gap quantum well layer sandwiched between two thin wide band gap barriers layers. It exhibits negative differential resistance (NDR) region in its current-voltage (I-V) characteristics which is utilised in making oscillators. Up to date, the main challenge is producing high output power at high frequencies in particular. Although oscillation frequencies of ~ 2 THz have been already reported, the output power is in the range of micro-Watts. This thesis describes the systematic work on the design, fabrication, and characterisation of RTD-based oscillators in microwave/millimetre-wave monolithic integrated circuits (MMIC) form that can produce high output power and high oscillation frequency at the same time. Different MMIC RTD oscillator topologies were designed, fabricated, and characterised in this project which include: single RTD oscillator which employs one RTD device, double RTDs oscillator which employs two RTD devices connected in parallel, and coupled RTD oscillators which combine the powers of two oscillators over a single load, based on mutual coupling and which can employ up to four RTD devices. All oscillators employed relatively large size RTD devices for high power operation. The main challenge was to realise high oscillation frequency (~ 300 GHz) in MMIC form with the employed large sized RTD devices. To achieve this aim, proper designs of passive structures that can provide small values of resonating inductances were essential. These resonating inductance structures included shorted coplanar wave guide (CPW) and shorted microstrip transmission lines of low characteristics impedances Zo. Shorted transmission line of lower Zo has lower inductance per unit length. Thus, the geometrical dimensions would be relatively

Resonant tunnelling diode (RTD) is known to be the fastest electronics device that can be fabricated in compact form and operate at room temperature with potential oscillation frequency up to 2.5 THz. The RTD device consists of a narrow band gap quantum well layer sandwiched between two thin wide band gap barriers layers. It exhibits negative differential resistance (NDR) region in its current-voltage (I-V) characteristics which is utilised in making oscillators. Up to date, the main challenge is producing high output power at high frequencies in particular. Although oscillation frequencies of ~ 2 THz have been already reported, the output power is in the range of micro-Watts. This thesis describes the systematic work on the design, fabrication, and characterisation of RTD-based oscillators in microwave/millimetre-wave monolithic integrated circuits (MMIC) form that can produce high output power and high oscillation frequency at the same time. Different MMIC RTD oscillator topologies were designed, fabricated, and characterised in this project which include: single RTD oscillator which employs one RTD device, double RTDs oscillator which employs two RTD devices connected in parallel, and coupled RTD oscillators which combine the powers of two oscillators over a single load, based on mutual coupling and which can employ up to four RTD devices. All oscillators employed relatively large size RTD devices for high power operation. The main challenge was to realise high oscillation frequency (~ 300 GHz) in MMIC form with the employed large sized RTD devices. To achieve this aim, proper designs of passive structures that can provide small values of resonating inductances were essential. These resonating inductance structures included shorted coplanar wave guide (CPW) and shorted microstrip transmission lines of low characteristics impedances Zo. Shorted transmission line of lower Zo has lower inductance per unit length. Thus, the geometrical dimensions would be relatively