bluuebunny/crossref_metadata_2025 huggingface dataset:
The Influence of Genetic Syndromes on the Algorithm of Cleft Lip and Palate Repair – A Retrospective Study
Authors: Sándor-Bajusz Kinga Amália , Maros Teodor Barna , Olasz Lajos , Sándor George Kálmán , Hadzsiev Kinga , Vástyán Attila Mihály
Published: November 2021

Introduction:

This study aimed to determine if the treatment algorithm used for nonsyndromic cleft patients required alteration to manage syndromic cleft lip and/or palate patients.

Methods:

The records of patients managed by the Pécs Cleft Team between January 1999 and December 2015 were analyzed retrospectively. The sources of the data included clinical and genetic records.

Results:

A total of 607 patients were managed by the cleft team during the study. Sixteen patients (2.6%) were noted to be afflicted with a particular identifiable syndrome. Seven different genetic syndromes and one sequence were present in the study. The Pierre Robin sequence occurred most often, comprising 50% of the cohort. The treatment algorithm used in managing nonsyndromic clefts required modification in 13 of the 16 syndromic patients.

Discussion:

The presence of a genetic syndrome may notably affect the treatment algorithm in children born with cleft lip and/or palate. The surgical treatment of certain associated anomalies has by necessity, priority over the timing of the reconstruction of the cleft lip and/or cleft palate in syndromic patients.
Health care reform as perceived by nursing staff in selected hospitals
Authors: Naguib Sara A. , Al-Hamid Magda Abd , Zayed Maaly
Published: November 2021

Background

The Egyptian healthcare system has challenges in order to promote and maintain Egyptian human health and well-being. Healthcare reform is a program to modernize Egypt’s healthcare system, with a goal of shifting the focus of healthcare away from a high reliance on vertical programs, inpatient care, and toward a more integrated, less expensive, quality, universally accessible, and sustainable healthcare system. The aim of this study was to assess healthcare reform as perceived by nursing staff in three selected hospitals.

Research design

A descriptive comparative research design.

Sample

A convenience sample of total (N=559) staff nurses classified as the following: n=224 at governmental hospital, n=290 at health insurance hospital, and n=45 at a private hospital at El Gharbia governorate.

Results

In terms of healthcare reform as perceived by nursing staff, a highly statistically significance difference was found among the three hospitals. In addition, nursing staff at health insurance hospitals had more positive perceptions toward healthcare reform than nursing staff in other hospitals.

Recommendations

Design workshops and nurses’ training programs on healthcare reform rules, regulations, managerial skills, and duties during the reform process. As healthcare technology progresses, the quality and distribution of resources at practically all levels of care should increase. Finally, new nursing duties should be added to the job description in order for them to be more engaged in the centralized decision throughout healthcare reform.
Nutritional assessment among patients with chronic renal failure undergoing hemodialysis
Authors: Fawzy Mohamed M. , Morsy Nagat E. , El-Moneem Dalia Salah El-Deen Abd
Published: November 2021

Background

Patients with chronic renal failure on hemodialysis suffered from many nutritional complications such as protein-energy wasting. Nutritional assessment is a basic and necessary process in the nutritional management of those patients. Nutritional assessment includes obtaining specific data to create a metabolic and nutritional profile of the patient.

Aim

The study aimed to assess the nutritional status among patients with chronic renal failure undergoing hemodialysis regimen.

Design

A descriptive research design was utilized in the study.

Sample

A convenient sample of 100 participants undergoing hemodialysis.

Setting

Data were collected from Nephrology, Dialysis, and Transplantation Center at Kaser Al-Ainy Hospital, affiliated to Cairo University hospitals.

Tools

Two tools were utilized to collect data: sociodemographic data sheet and comprehensive nutritional assessment sheets.

Results

Male and female participants nearly equal to 78% urban.

Conclusion

The study results revealed that the majority of study sample has many nutritional disturbances such as anemia, hypocalcemia, and decreased lean body mass.

Recommendations

Raising awareness of nurses who care for hemodialysis patients regarding the importance of nutritional assessment of hemodialysis patients and its application in the protocol of care.
Seroprevalence of Transfusion-Transmitted Infections among Blood Donors in a Tertiary Care Hospital in Puducherry
Authors: Cherukat Jayasree , Kulkarni Rajendra , Basavarajegowda Abhishekh
Published: November 2021

Introduction:

Although significant strides have happened in making blood transfusions safe, with each transfusion, there is a chance to transmit transfusion-transmitted infections (TTI), namely viral, bacterial, parasitic, and prions. The primary objective of this study was to assess the seroprevalence of the five mandatorily to be tested TTI's in India among blood donors at our center.

Methodology:

This was a cross-sectional observational study conducted in the Department of Transfusion Medicine, a tertiary care hospital in Puducherry, from August 2015 to February 2017. Enzyme-linked immunosorbent assay was done for HIV, HCV, HBsAg/hepatitis B surface antigen, and rapid plasma reagin test was done for syphilis. Rapid card testing was done for malaria.

Results:

There were a total of 28,380 donors during the study period. In the present study, the overall seroprevalence of TTI's was 3.06%. The individual seropositivity rates were 0.30% for HIV, 2.15% for HBsAg, 0.51% for HCV, and 0.08% for syphilis. There was no case of malaria diagnosed in the study period. Conclusion: The seroprevalence of TTI in Puducherry was similar to those reported elsewhere in the country. It was comparable to the national average with regard to HIV and HCV, higher for HBV and much lesser for syphilis.
Prognostic value of inflammatory biomarkers for predicting the extent of lung involvement and final clinical outcome in patients with COVID-19
Authors: Abrishami Alireza , Eslami Vahid , Arab-Ahmadi Mehran , Alahyari Sam , Azhideh Arash , Sanei-Taheri Morteza
Published: November 2021

Background:

Inflammation plays a major role in coronavirus disease (COVID-19). Factors that convey information about the status of inflammation could predict disease severity and help identify patients prone to clinical deterioration. Here, we aimed to evaluate the predictive value of inflammatory markers on the extent of lung involvement and survival of patients with COVID-19.

Materials and Methods:

Eighty patients with confirmed COVID-19 were enrolled. Demographic, clinical, and laboratory data were collected at admission. All patients underwent chest computed tomography (CT); the extent of lung involvement was assessed by a scoring system. Patients were followed up until death or discharge occurred. Logistic regression analysis was performed to evaluate the association of investigated variables with COVID-19-related death. The association between different variables and CT score was assessed using linear regression model. Receiver operator characteristic curve analysis was applied to identify the predictive value of inflammatory markers and CT score on survival.

Results:

The mean age of patients was 54.2 ± 15.2 years; 65% were male. Increased neutrophil-to-lymphocyte ratio (β =0.69, odds ratio [OR] =1.50), platelet-to-lymphocyte ratio (β =0.019, OR = 1.01), and decreased lymphocyte to C-reactive protein ratio (LCR) (β = −0.35, OR = 0.62) were significantly associated with a higher CT score and increased odds of death (P < 0.05). Lactate dehydrogenase level was also positively related with extensive lung involvement and death (β =1.15, OR = 1.52, P < 0.05). The LCR threshold for identifying survivors from nonsurvivors was 0.53 (area under curve [AUC] =0.82, 78% sensitivity and 74% specificity). Lung involvement ≥50% on chest CT was an excellent predictor of death (AUC = 0.83, 81% sensitivity and 79% specificity).

Conclusion:

Daily-performed laboratory tests that represent inflammation have great value for predicting the amount of disease burden and risk of mortality. Moreover, their cost-effectiveness and feasibility turn them into ideal prognostic markers.
Did Iranians change their eating behavior following COVID-19 outbreak?
Authors: Akbarzadeh Marzieh , Barati-Boldaji Reza , Mohsenpour Mohammad Ali , Ferns Gordon A. , Jalali Mohammad , Mosallanezhad Zahra , Karamizadeh Malihe
Published: November 2021

Background:

Significant lifestyle changes have been reported after COVID-19 outbreak. The present study aimed at investigating changes in dietary habits in response to the COVID-19 outbreak in an Iranian population sample.

Materials and Methods:

In this cross-sectional study, the dietary habits of Iranian adults were assessed before and during the COVID-19 outbreak. Consumption of different food groups such as meats, dairy, fruits, vegetables, seeds, and nuts was assessed using a digital questionnaire which was shared on social media platforms. For the statistical analysis, the Wilcoxon signed-rank test was used.

Results:

In this online survey, 1553 questionnaires were completed. The results showed that the reported consumption of protein-rich foods increased (P < 0.05), but fish and dairy consumption showed a significant reduction (P = 0.006 and <0.001, respectively). There was a significant reduction in reported fast-food consumption (P < 0.001). Fruits and vegetables (P < 0.001), natural fruit juices (P < 0.001), and water (P < 0.001) were consumed more frequently. Individuals also consumed more vitamin and mineral supplements (P < 0.001) including those containing Vitamin D.

Conclusion:

During the COVID-19 pandemic, participants reported a significant change in their dietary habits and intake of supplements. Higher intakes of meats, protein-rich foods, fruits, vegetables, and nutritional supplements and lower intakes of fish, dairy, and fast foods were reported.
Investigation of microRNA-10b values for the discrimination of metastasis due to melanoma
Authors: Mokhtari Mojgan , Rouhanizadeh Noushin , Hajialiasgar Shahla
Published: November 2021

Background:

Melanoma is one of the most invasive cutaneous cancers with characteristics such as rapid progression and distant metastasis. The early diagnosis and staging of melanoma can help better manage the patients. The current study is aimed to assess the values of microRNA-10b (miRNA-10b) in the discrimination of metastatic melanomas.

Materials and Methods:

The current cross-sectional study has been conducted on forty patients diagnosed with melanoma since 2011. Cell culture of melanoma cell lines derived from the cancerous tissue, including WM115, BLM, K1735, WM793, and A375M, was cultured. In order to assess miRNA-10b levels, the real-time polymerase chain reaction was utilized. The absence (n = 20)/presence (n = 20) of metastasis was diagnosed with chest computed tomography or chest X-ray. The values of miRNA-10b for the discrimination of metastasis incidence were assessed.

Results:

The demographic characteristics, including age and gender of the metastatic and nonmetastatic patients, were similar (P > 0.05). The specimen cultures were positive for miRNA-10b in 14 (35%) of the metastatic cases versus 4 (20%) of the nonmetastatic ones (P = 0.004). The quantitative analysis of miR-2b revealed significantly higher levels in metastatic cases (−1.59 ± 1.13 in metastatic vs. −0.16 ± 0.67 in nonmetastatic cases; P = 0.001). The measured area under the curve for the value of miRNA-10b was 0.923 (P < 0.001; 95% confidence interval: 0.811–1) with sensitivity and specificity of 100% and 94.4%.

Conclusion:

Based on this study, metastatic melanoma was associated with elevated levels of miRNA-10b. This marker had the sensitivity and specificity of 100% and 94.4% for the discrimination of metastatic melanoma from nonmetastatic ones.
Assessing abdominal aortic calcifications before performing colocolic or colorectal anastomoses
Authors: Deguelte Sophie , Besson Romain , Job Louis , Hoeffel Christine , Jolly Damien , Kianmanesh Reza
Published: November 2021

Background:

Preoperative evaluation needs objective measurement of the risk of anastomotic leakage (AL). This study aimed to determine if cardiovascular disease, evaluated by abdominal aortic calcification (AAC), was associated with AL after colorectal anastomoses. We conducted a retrospective case–control study on patients who underwent colorectal anastomosis between 2012 and 2016 at Reims University Hospital (France). Abdominal aortic calcification was the main variable of measurement.

Materials and Methods:

We reviewed all patients who had a left-sided colocolic or a colorectal anastomosis, all patients with AL were cases; 2 controls, or 3 when possible, without AL were randomly selected and matched by operation type, pathology, and age. For multivariate analysis, 2 logistic regression models were tested, the first one used the calcification rate as a continuous variable and the second one used the calcification rate ≥ 5% as a qualitative variable.

Results:

Forty-five cases and 116 controls were included. In univariate analysis, the calcification rate and the percentage of patients with a calcification rate ≥5% were significantly higher in cases than in control groups (4.4 ± 5.5% vs. 2.5 ± 5.2%, odds ratio [OR] =1.6 95% CI: 1.1–2.5; n = 22, 49% and n = 34.3 3%, OR = 2.8 95% CI: 1.2–6.2). In multivariate models, calcification rate as a continuous variable and calcification rate ≥5% as qualitative variable were independent significant risk factors for AL (respectively, aOR = 1.8; 95% CI: 1.1–3, P = 0.01; aOR = 3.2; 95% CI: 1.4–7.55, P < 0.01).

Conclusion:

AAC ≥5% should alert on a higher risk of AL and should lead to discussion about the decision of performing an anastomosis.
Utility of Morphometry in Breast Carcinoma and its Correlation with Grade and MIB-1 Labelling Index
Authors: Verma Nisha , Baveja Puneet , Mahajan Saurabh
Published: November 2021

ABSTRACT

Introduction:

Breast cancer is the leading cancer in women worldwide. In breast cancer, measurement of nuclear proliferation can be used in conjunction with other tumor parameters such as grade, lymphovascular invasion, and nodal status for prognosis. Various techniques have been developed to study the proliferation rate using immunohistochemistry (IHC) with Ki67/MIB-1. Employing morphometry has been reported to add accuracy to proliferation counts. The present study was done with an aim to study the pattern of MIB-1 labeling index by morphometry.

Methodology:

This is a descriptive study carried out at a tertiary care center in Western Maharashtra over a period of 18 months wherein 94 cases were studied. Maximum infiltrating tumor was assessed on H and E-stained sections. MIB-1% was determined using IHC and nuclear size was determined using morphometry.

Results:

There was a weak correlation between MIB-1 index (%) of Grade 1 tumors and their average nuclear sizes which were not significant (P = 0.509) whereas the correlation between MIB-1 index of Grade 2 and 3 tumors and their average nuclear sizes had a strong correlation with P < 0.05. Overall, it was seen that MIB-1 (%) index and nuclear sizes had a strong correlation with P < 0.05.

Conclusions:

MIB-1 labeling index significantly correlated with the average nuclear size of the tumor and MIB-1 labeling index can serve as a useful adjunct to histological grading of the tumors. In patients with a low histological Grade but high MIB-1 labeling index suggesting a poorer prognosis, caution may be exercised with an aggressive line of management.
COVID-19-Associated Severe Acute Pancreatitis
Authors: Prasad Ajay Shankar , Mujeeb V. R. , Gupta Salil , Dixit Prashant Kumar
Published: November 2021

As the knowledge about coronavirus disease 2019 (COVID-19) is increasing day by day, we are learning about various manifestations of COVID-19. The disease is a systemic illness that also involves the gastrointestinal system including the pancreas. Here, we report the case of a 14-year-old girl who presented with a pancreatic type of pain abdomen. She was diagnosed with acute pancreatitis (AP) based on clinical symptoms, ≥3 times the elevation of serum amylase, and imaging evidence of AP. Her Bedside Index of Severity in AP was 2/5 and the Modified Computed Tomography Severity Index was 10/10. She had positive reverse transcriptase-polymerase chain reaction for COVID-19. Her workup for common and rare causes of AP was negative. She was managed conservatively as per standard protocol for the management of AP. The aim of this case is to highlight the importance of causal association of COVID-19 with AP.
Challenges Associated with the Management of Giant Mandibular Ameloblastoma in a Resource-Poor Environment
Authors: Adebayo Ezekiel Taiwo , Salami Afolake Shakirat , Adelusi Emmanuel Adetolu , Ahaji Lilian Ejije
Published: November 2021

Ameloblastoma, the most common odontogenic tumor in sub-Saharan Africa, has initial clinical features of painless, slow growth that sometimes results in giant sized, neglected, or gigantic lesions, often called giant ameloblastoma. The definition of giant ameloblastoma is controversial, their full characteristics, especially tumor growth rate, are yet to be fully elucidated, but their large sizes make management quite challenging. This case report presents giant mandibular ameloblastoma that developed over 10 years in a 30-year-old male. The lesion extended from one ramus to the other, measuring 48 cm × 38 cm × 17 cm. The treatment was segmental resection of the lesion after preoperative tracheostomy. Reconstruction was by retaining jaw form using the titanium reconstruction plate due to inability to perform free-bone grafts in this environment. There is need for universal health insurance in Nigeria to improve financial access to health-care services. Improved technical skill of surgeons and other clinical staff will also assist to optimize the treatment outcomes for patients with giant-sized lesions.
Sexual Practices, Risk Perception and HIV Self-Testing Acceptability Among Long-Distance Truck Drivers in Ekiti State, Nigeria
Authors: Adeoti Adekunle Olatayo , Desalu Olufemi Olumuyiwa , Oluwadiya Kehinde Sunday
Published: November 2021

Background:

HIV/AIDS is a global health challenge with a high burden in sub-Saharan Africa. Long-distance drivers are a high-risk group whose assessment of HIV status, awareness and willingness to undergo HIV self-testing (HIVST) could help prevent the spread of HIV infections.

Objective:

This study examined the sexual practices, risk perception and HIVST acceptability among long-distance truck drivers in Ekiti State, Nigeria.

Methods:

A cross-sectional study was conducted among long-distance truck drivers between September 2019 and December 2019. A semi-structured questionnaire was designed to investigate the perceived sexual risk factors and willingness to undergo HIVST.

Results:

Of the 306 drivers that participated in the study, almost half (49.8%) had their first sexual experience before they turned 18 years. About one-third (38.6%) had multiple sex partners and (34.0%) patronised commercial sex workers in the past 6 months. Consistent use of condoms was reported in a negligible percentage (3.0%), while 7.4% used intravenous drugs. Two-thirds of the respondents were interested in HIVST, while 32.2% knew their HIV status. Significant factors associated with multiple sex partners were the duration of working as a long-distance truck driver and patronage of sex workers.

Conclusion:

A significant proportion of the long-distance drivers were engaged in unsafe sexual practices and are at risk for HIV transmission. Considering the mobile nature of the long-distance drivers, the risky practices of these workers require intense advocacy, testing and treatment to reduce HIV transmission. Scaling-up testing using HIVST has the potential to bridge the gap in the diagnosis of HIV among long-distance drivers who are willing to be tested.
Distribution Pattern and Prevalence of Haematological Cancers among Adults in Abakaliki, South-Eastern Nigeria
Authors: Ugwu Ngozi Immaculata , Okoye Augustine Ejike , Ugwu Collins N , Iyare Festus E. , Edegbe Felix Osogu , Ugwu Gabriel Chima , Chukwurah Ejike Felix , Richard Ikeagwulonu Chinaza , John Davidson Okwudili , Nnadozie Ugochukwu Uzodimma , Nwokwu Emmanuel Uchechukwu
Published: November 2021

Background:

Haematological cancers are clonal diseases of the blood and blood-forming organs, with the distribution pattern not known in our locality. This study aimed to describe the distribution pattern and prevalence of haematological cancers among adults in Abakaliki, Nigeria.

Materials and Methods:

This was an 8-year retrospective study in which the hospital records/case notes of adult patients diagnosed and managed for haematological cancers from May 2012 to April 2020 were reviewed. Data obtained were analysed with the SPSS software, version 20.

Results:

One hundred and thirty-five cases of haematological cancers were included in the study, with 72 (53.4%) males and 63 (46.6%) females and male-to-female ratio of 1.1:1. The age range was 18–82 years, with a mean age of 49 ± 17 years. Lymphoid malignancies predominate more than myeloid (101 [74.8%] vs. 34 [25.2%]). The leukaemias were more predominant than the lymphomas and myeloma accounting for 48.2%, 36.3% and 7.4%, respectively. Chronic leukaemias were more common than the acute leukaemias with chronic lymphocytic leukaemia (CLL) being the most common accounting for 24.4% of haematological cancers. In general, non-Hodgkin's lymphoma (NHL) was the most common haematologic cancer accounting for 35 (25.9%), followed by CLL 33 (24.4%), chronic myeloid leukaemia (CML) 17 (12.6%), Hodgkin's lymphoma (HL) 14 (10.4%) and multiple myeloma (MM) 10 (7.4%). Others include acute lymphoblastic leukaemia (ALL) 9 (6.7%) and acute myeloblastic leukaemia (AML) 6 (4.4%). Myelodysplastic syndrome (MDS) and polycythaemia vera (PV), each contributed 3% while myelofibrosis (MF) and essential thrombocythaemia (ET) contributed 1.5% and 0.7%, respectively.

Conclusion:

This study has shown that haematological cancers are not uncommon in our locality with NHL being the most common, followed by CLL, CML, HL, MM, ALL, AML, MDS, PV. MF and ET in that order. The burden of haematological cancers in Ebonyi State, Nigeria is therefore significant and should be prioritised in health-care policy formulation and management.
Prevalence of Malnutrition and its Associated Sociodemographic and Clinical Factors among Adolescents in Selected Schools of Urban Puducherry, India
Authors: Wangaskar Sneha Anil , Sahu Swaroop Kumar , Majella Marie Gilbert , Rajaa Sathish
Published: November 2021

Background:

In India, adolescents constitute 21% of the total population. Majority of boys and girls in developing countries enter adolescence as undernourished, making them more vulnerable to several diseases.

Objective:

Among adolescents in selected schools of urban Puducherry, we determined the prevalence of malnutrition and also assessed the sociodemographic and clinical factors associated with undernutrition.

Materials and Methods:

A cross-sectional analytical study was conducted among adolescents (10–18 years) in selected public schools of Urban Puducherry. Data were collected using semi-structured and pre-tested questionnaires. The data collection period was between September and October 2019. Malnutrition was assessed by the World Health Organisation recommended Height-for-age and body mass index-for-age cut-offs using AnthroPlus software.

Results:

A total of 144 (28.9%) boys and 355 (71.1%) girls were included in the study (N = 499). The prevalence of malnutrition was 46.8% (95% confidence interval [CI]: 42.5–51.3). The prevalence of undernutrition was 33.3% (Stunting [21.6%] and Thinness [15%]). The prevalence of overweight and obesity were 10.2% and 5.8%, respectively. Male gender was found to be an independent risk factor of undernutrition (annual percentage rate = 1.4; 95% CI: 1.0–1.9); and known risk factors such as socio-economic status, parental education were not significantly associated with undernutrition.

Conclusions:

One in every two school-going adolescents was malnourished. Despite the high prevalence of undernourishment, over nourishment was also commonly observed. Educating parents and students about growth monitoring and dietary habits might help in bringing down the burden of malnutrition.
Design and Simulation of Smart Communication System for Unmanned Arial Vehicles
Authors: Mani Prashant , Singh Pankaj , Singhal Abhishek , Katiyar Apoorv
Published: November 2021

In recent years, the use of drones has drastically increased as the evolution of drone use in commercial sectors and reduced costs of the hardware. Earlier drone services were mostly used for military operations but nowadays the Unmanned Arial Vehicles (UAV) system is very advanced and its applications are not limited to military operations. The recent years have also witnessed a network evolution of UAVs from single ground to air network to multi-UAV network systems along with usage of wireless public networks like LTE which can act as UAV communication channel. In the proposed project, a communication system used in the UAS system is simulated to analyze the UAV behavior under different conditions with respect to mission planning and the communication networks used. A comprehensive study is done on communication networks used in controlling UAVs. For a safer approach, the proposed model is simulated using available software instead of hardware implementations. ArduPilot SITL, MAVProxy and Mission Planner are used to simulate the UAV system virtually. Whereas network simulations of Wi-Fi and LTE network are done with the help of NS-3 on a separate platform. Various network parameters like network delay, throughput, etc., are graphically represented.
COVID-19 Pandemisinin Geç Adölesanların Duygu Durumlarına ve Yaşam Kalitesine Etkisi
Authors: AVAN Hakan , GÜNGÖR Serap
Published: November 2021

Amaç: Çocukluktan yetişkinliğe geçiş aşamasında olan geç adölesanların Covid-19 salgını nedeniyle fiziksel, sosyal ve mental olarak sağlıklı yaşam biçimlerini etkileyen durumları belirlemek amacıyla planlanmıştır.

Gereç ve Yöntem: Kesitsel ve tanımlayıcı olarak planlanan araştırma 01-15 Haziran 2020 tarihleri arasında, 18-21 yaş grubundaki 801 geç adölesan ile tamamlanmıştır. Veri toplama formu olarak “Tanıtıcı Anket Formu”, “Pozitif ve Negatif Duygular Ölçeği” ve “SF-12 Ölçeği” kullanılmıştır. Verilerin analizinde tanımlayıcı istatistiki yöntemler, t-testi, ANOVA, Mann-Whitney-U, Kruskall Wallis varyans analizleri kullanılmıştır.

Bulgular: Araştırmaya katılan geç adölesanların %77.90’ı (n=624) kadın olduğu ve %55.60’ının şehirde yaşadığı tespit edilmiştir. UBÖS düzeylerinin ebeveyn ile sorun yaşama durumlarına göre ortalamalar arasındaki farkın önemli olduğu görülmüştür (t801=1.06, p=0.001; p
Öğretmenlerin Öz Yeterlilikleri İle Sınıf Yönetimi Becerileri Arasındaki İlişkinin İncelenmesi
Authors: VATANSEVER BAYRAKTAR Hatice , ÇELİK Oğuz
Published: November 2021

Öğretmenlerin özyeterlilikleri ile sınıf yönetim beceri düzeyleri arasındaki ilişkinin incelendiği çalışma 394 tane öğretmenden elde edilen verilerle gerçekleştirilmiştir. Araştırmada öğretmenlerin öz yeterlilik algıları, Tschannen-Moran ve Hoy (2001) tarafından geliştirilen, Çapa, Çakıroğlu ve Sarıkaya (2005) tarafından Türkçeye uyarlanan “Öğretmen Öz-yeterlik Ölçeği” kullanılarak ölçülmüştür. Ölçek “öğrenci katılımı”, “öğretim stratejileri” ve “sınıf yönetimi” olmak üzere üç alt boyut ve 24 tane maddeden oluşmaktadır. Sınıf yönetimi becerileri ise 1982 yılında Delson tarafından geliştirilmiş olup Yalçınkaya ve Tonbul tarafından 2002 yılında Türkçe’ye uyarlamıştır. Tek boyuttan oluşan ölçek 25 tane sorudan oluşmaktadır. Araştırmanın alt problemleri çerçevesinde yapılan analizler neticesinde kadın öğretmenlerin sınıf yönetim becerileri düzeylerinin erkek öğretmenlere göre daha yüksek düzeyde olduğu tespit görülmüştür. Bununla birlikte öğretmenlerin eğitim durumlarına göre de farklılık gösterdiği tespit edilmiştir. Buna göre önlisans mezunu olan öğretmenlerin öğrenci katılımına yönelik özyeterlilik düzeyleri, öğretim stratejilerine yönelik özyeterlilik düzeyleri ve genel özyeterlilik düzeylerinin lisans mezunu olan öğretmenlere göre daha yüksek düzeyde olduğu tespit edilmiştir. Yapılan bir diğer analiz ise mesleki kıdem yıllarına ilişkin özyeterlilik ve sınıf yönetimine dair görüşlerin farklılıklarıdır. Elde edilen bulgular, 11-15 yıl aralığında bulunduğu okulda görev yapan öğretmenlerin 1 yıldan az görev yapan öğretmenlere göre sınıf yönetim düzeylerinin daha yüksek düzeyde olduğu yönündedir. Araştırma neticesinde özyeterlilik ile sınıf yönetimi arasında pozitif yönlü ve orta düzeyli ilişki olduğu tespit edilmiştir.
Isıl işlem görmüş D2 Soğuk İş Takım Çeliğinin Tel Erozyonda İşlenmesinde Kesme Parametrelerinin Beyaz Tabaka kalınlığı ve Yüzey Sertliğine Etkisi
Authors: BALLIKAYA Hasan , ALTUĞ Mehmet
Published: November 2021

Bu çalışmada tel erozyon (WEDM) yöntemi kullanılarak Sverker 21 soğuk iş takım çeliğinin kesme parametrelerinin işleme sonrası malzemede oluşan beyaz tabaka ve kesme yüzeyi sertliğine etkileri incelenmiştir. Yüksek alaşımlı çeliğin kullanılmasındaki amaç; içerdiği alaşım elementi ve karbon oranına bağlı olarak yüksek sertlik, aşınma dayanımı ve tokluk özelliklerinden dolayı kalıpçılık endüstrisinde yaygın olarak kullanılmasıdır. Deneysel çalışmalarda hem ticari hem de ısıl işleme tabi tutulmuş soğuk iş takım çeliği kullanılmıştır. Kesme parametreleri olarak ticari numune ve ısıl işlem görmüş numune, iki ark arası süre (µs), voltaj (V), sıvı basıncı (bar), tel gerginliği (g), tel ilerleme hızı (m/min) kullanılmıştır. Deney tasarımı için Taguchi deney tasarım planı ve L18 ortogonal dizini kullanılarak malzemeler kesilmiştir. Sonuç olarak işlenmiş yüzey sertliği ve yeniden oluşan beyaz tabaka kalınlığı incelenmiştir. ANOVA yöntemine göre beyaz tabaka kalınlığı üzerindeki en etkili parametre % 57.236 ile ticari ve ısıl işlem görmüş numune parametresidir. Kesilen yüzey sertlik değerlerinde ise en etkin parametre % 98.627 oranında numune parametresi olmuştur.
COVID-19 Risk Factors, Economic Factors, and Epidemiological Factors nexus on Economic Impact: Machine Learning and Structural Equation Modelling Approaches
Authors: David Opeoluwa Oyewola  , Dada Emmanuel Gbenga , Ndunagu Juliana Ngozi , Abubakar Umar Terrang , S.A Akinwunmi
Published: November 2021

Since the declaration of COVID-19 as a global pandemic, it has been transmitted to more than 200 nations of the world. The harmful impact of the pandemic on the economy of nations is far greater than anything suffered in almost a century. The main objective of this paper is to apply Structural Equation Modeling (SEM) and Machine Learning (ML) to determine the relationships among COVID-19 risk factors, epidemiology factors and economic factors. Structural equation modeling is a statistical technique for calculating and evaluating the relationships of manifest and latent variables. It explores the causal relationship between variables and at the same time taking measurement error into account. Bagging (BAG), Boosting (BST), Support Vector Machine (SVM), Decision Tree (DT) and Random Forest (RF) Machine Learning techniques was applied to predict the impact of COVID-19 risk factors. Data from patients who came into contact with coronavirus disease were collected from Kaggle database between 23 January 2020 and 24 June 2020. Results indicate that COVID-19 risk factors have negative effects on epidemiology factors. It also has negative effects on economic factors.
Application of computational chemistry in chemical reactivity: a review
Authors: Chidiebere C. W. , Duru C. E. , Mbagwu J. P. C.
Published: November 2021

Molecular orbitals are vital to giving reasons several chemical reactions occur. Although, Fukui and coworkers were able to propose a postulate which shows that highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) is incredibly important in predicting chemical reactions. It should be kept in mind that this postulate could be a rigorous one therefore it requires an awfully serious attention in order to be understood. However, there has been an excellent breakthrough since the introduction of computational chemistry which is mostly used when a mathematical method is fully well built that it is automated for effectuation and intrinsically can predict chemical reactivity. At the cause of this review, we’ve reported on how HOMO and LUMO molecular orbitals may be employed in predicting a chemical change by the utilization of an automatic data processing (ADP) system through the utilization of quantum physics approximations.
ИСКУСТВА ЛГБТ ОСОБА У МЕЂУЉУДСКИМ ОДНОСИМА И СФЕРИ РАДА У СРБИЈИ
Authors: Цекић Марио
Published: November 2021

Personal experience of LGBT individuals in interpersonal relations and in the professional sphere has been defined based on the results of research obtained by focus-group interviews. The research has been conducted on the sample of 6 participants, i.e., 3 male and 3 female members of LGBT population. The paper focuses on the experience of LGTB individuals in interpersonal relations and in the professional sphere and confirms the results of extensive research which indicate that there is a much higher level of tolerance to female homosexuality than tolerance to male homosexuality. Research results emphasize that gay men are faced with more serious concerns, both in interpersonal relations and in the professional sphere than lesbians. As a rule, all research participants have experienced disapproval and condemnation from their parents after revealing their sexual orientation. Even though family members of LGBT individuals have accepted their sexuality over time, their mutual relations have inevitably changed. Participants’ contacts with family members have been significantly reduced, as they do not share their feelings or confide in the members of their families as they used to. Additionally, after coming out about their sexuality, gay men have suffered insults and aversion from their friends or faced numerous difficulties when trying to make new friends. On the other hand, lesbian participants in the research have not seen their sexual orientation as an obstacle to making new friends or interacting with their old friends and acquaintances.
TOURISTS SATISFACTION TOWARDS SMART TOURISM SERVICES IN MALAYSIA
Authors:   Universiti Malaysia Terengganu, Mohamed Sofian Izza Nazura , Padlee Siti Falindah ,   Universiti Malaysia Terengganu, Hussin Noor Zatul Iffah ,   Universiti Malaysia Terengganu
Published: November 2021

Smart tourism projects are already underway across the globe including Tourism Malaysia. In 2018, Tourism Malaysia has launched the Malaysia Smart Tourism 4.0 initiative to take the industry to the next level by capitalizing on the new opportunities of the digital age. Despite the increase in the number of studies on customer satisfaction towards smart tourism services, only a limited number of studies were carried out in Malaysia. Therefore, this research proposes to obtain a better overview of this issue from a Malaysian perspective. The main objective of this study is to analyse the relationship between smart tourism technology attributes, tourist service satisfaction levels and to assess the relationship between the levels of tourist service satisfaction and the intention to use new technology. This study was also carried out to examine the moderating effect of trust on the relationship between smart tourism technology. This study will use a structural equation method to find the relationship between the smart tourism technology attributes of trust, service satisfaction, and the intention to use. This study employs a quantitative method of analysis with a questionnaire that were distributed to Malaysian tourists online. The sample size was selected based on the sample size table used by Krejcie & Morgan (1970). The study expects to find that smart tourism technology attributes are significantly associated with service satisfaction levels, and this it will have a positive effect on the intention to use. Meanwhile, the trust factor will be positively associated with service satisfaction.
ẢNH HƯỞNG CỦA THỜI GIAN TRỒNG ĐẾN SINH TRƯỞNG, PHÁT TRIỂN CỦA NẤM TRÂN CHÂU (Agrocybe aegerita)
Authors: Hường Lê Thị Thu , Minh Vũ Tuấn
Published: November 2021

Nghiên cứu được thực hiện trong vụ Xuân Hè tại trường Đại học Nông Lâm, Đại học Huế nhằm xác định được thời vụ thích hợp cho sinh trưởng, phát triển của nấm Trân Châu tại Thừa Thiên Huế. Thí nghiệm được bố trí theo phương pháp hoàn toàn ngẫu nhiên (CRD), gồm 5 công thức với 5 thời điểm cấy giống khác nhau trong tháng 4 và tháng 5 là 1/4; 10/4; 20/4; 30/4 và 10/5, 3 lần lặp lại, mỗi lần lặp theo dõi 10 bịch. Kết quả cho thấy công thức I, thời điểm cấy giống vào 1/4 cho kết quả tốt nhất. Thời gian phủ kín nguyên liệu 43,26 ngày, thời gian xuất hiện quả thể 57,53 ngày và thời gian quả thể trưởng thành và thu hái 65,87 ngày. Chiều dài quả thể đạt 10,69 cm, đường kính quả thể 3,99 cm và trọng lượng quả thể đạt 90,28 g/cụm quả thể, không xuất hiện mẫu nhiễm. Năng suất đạt 225,70 kg/ tấn nguyên liệu khô dẫn đến lãi ròng thu được 13,92 triệu đồng, cao hơn so với các công thức cùng nghiên cứu.

ABSTRACT

The experiment was carried out during the Summer-Autumn season at University of Agriculture and Forestry, Hue University to determine the suitability of planting time for the growth performation of Southern Poplar mushroom in Thua Thien Hue province. The experiment was arranged in completely randomized design, including 5 treatments, which were 5 different seedling propagation times of April 1st; April 10th; April 20th; April 30th and May 10th in 3 replications and 10 monitoring bags per each replication. The results showed that the experimental treatment I, which were inoculation time on April 1st, gave the best results compared to other experimental treatment such as the time mycelium covered material at 43.26 days; The time to appear mushroom body reached 57.53 days and the time to mature and harvest of mushroom body was 65.87 days; The length of the mushroom body at 10.69cm, the mushroom body diameter at 3.99cm and the weight of the mushroom body gave 90,28 g/mushroom cluster; infection rate gave 0%. The yield was 22.57% compared to the volume of dry material led to the net profit got 13,92 million VND, higher than all of treatments in the same study.
ỨNG DỤNG GIS XÂY DỰNG BẢN ĐỒ KHÔ HẠN ĐẤT SẢN XUẤT NÔNG NGHIỆP TẠI HUYỆN LỆ THỦY VÀ QUẢNG NINH, TỈNH QUẢNG BÌNH
Authors: Thanh Lê Hữu Ngọc , Linh Nguyễn Thị Nhật , Ngữ Nguyễn Hữu , Nõn Dương Quốc , Phương Nguyễn Thùy
Published: November 2021

Thông qua việc ứng dụng công nghệ GIS, nghiên cứu đã sử dụng kết quả 9 trạm đo vệ tinh về lượng mưa, lượng bốc hơi và căn cứ theo Thông tư 14/2012/TT-BTNMT về quy định kỹ thuật điều tra thoái hóa đất của Bộ Tài nguyên và Môi trường để xây dựng bản đồ khô hạn đất sản xuất nông nghiệp tại huyện Lệ Thủy và huyện Quảng Ninh, tỉnh Quảng Bình. Kết quả nghiên cứu cho thấy: (i) Diện tích đất sản xuất nông nghiệp huyện Lệ Thủy và huyện Quảng Ninh lần lượt là 22.019 ha và 8.318 ha; (ii) Giai đoạn 2000 - 2019, kết quả chỉ số khô hạn (K) tại 9 trạm đo cho thấy số tháng có xuất hiện khô hạn từ 91 đến 112 tháng trong tổng số 240 tháng; (iii) Kết quả xây dựng bản đồ khô hạn cho thấy, diện tích đất sản xuất nông nghiệp có mức độ hạn trung bình của huyện Lệ Thủy và huyện Quảng Ninh lần lượt là 22.019 ha và 8.318 ha.

ABSTRACT

Through the application of GIS technology, the study used the results of 9 satellite measuring stations on rainfall, evaporation and according to Circular 14/2012 / TT-BTNMT on the technical regulations on degradation investigation land of the Ministry of Natural Resources and Environment to develop a dry map of agricultural land in Le Thuy and Quang Ninh district, Quang Binh province. The research results showed that: (i) The agricultural land areas of Le Thuy and Quang Ninh districts were 22,019 ha and 8,318 ha respectively; (ii) In the period of 2000 - 2019, the drought index (K) at 9 measuring stations showed that the number of months with drought occurred from 91 to 112 months out of 240 months; (iii) The results of the development of the drought map showed that the average agricultural production land areas of Le Thuy and Quang Ninh districts were 22.019 ha and 8.318 ha respectively.
XỬ LÝ NƯỚC THẢI SINH HOẠT BẰNG ĐẤT NGẬP NƯỚC NHÂN TẠO NỀN XỈ THAN TỔ ONG KẾT HỢP TRỒNG CỎ VOI
Authors: Lavane Kim , Hạnh Nguyễn Thị Hoàng , Toàn Phạm Văn
Published: November 2021

Nghiên cứu này nhằm đánh giá hiệu suất của đất ngập nước (ĐNN) nhân tạo dòng chảy ngầm theo phương ngang (HSSF) và phương đứng (VF) có vật liệu nền là xỉ than tổ ong và trồng cỏ voi. Thí nghiệm được tiến hành trên mô hình phòng thí nghiệm với lưu lượng nạp của nước thải sinh họat là 85 lít/ngày. Tải lượng nạp BOD5, COD, TN, TP vào mô hình lần lượt là 7,47 g/m2.ngày, 3,17 g/m2.ngày, 1,43 g/m2.ngày, 0,12 g/m2.ngày. Kết quả nghiên cứu cho thấy nồng độ các chỉ tiêu ô nhiễm sau xử lý giảm đáng kể và đạt loại A theo QCVN 14:2008/BTNMT trong cả hai mô hình HSSFCW và VFCW. Hiệu suất xử lý của HSSFCW và VFCW đối với các chỉ tiêu lần lượt là SS: 88,7% và 92,4%; BOD5: 95,3% và 92,6%; COD: 94,3% và 92,6%; TN: 54,1% và 47,5%; N-NO3-: 38,4% và 33,6%; TP: 73,5% và 63,2%; P-PO43-: 87,6% và 59,7%. Nhìn chung, mô hình HSSFCW có hiệu suất loại bỏ các chất ô nhiễm tương đối cao hơn mô hình VFCW, ngoại trừ chỉ tiêu SS. Cỏ voi phát triển tốt và cho sinh khối cao trong thí nghiệm. Từ kết quả nghiên cứu cho thấy xỉ than tổ ong có thể tái sử dụng làm chất nền trong ĐNN nhân tạo dòng chảy ngầm. Bên cạnh đó, cỏ voi có thể trồng trong hệ thống ĐNN dòng chảy ngầm xử lý nước thải sinh hoạt.

ABSTRACT

This study aimed to evaluate the performances of horizontal subsurface flow (HSSF) and vertical flow (VF) constructed wetlands (CW) using combusted beehive charcoal residues as filtration bed media and planted with Napier grass (Pennisetum purpureum). The experimental systems were fed with a flow rate of 85 m3/day. The loading rates of BOD5, COD, TN, TP into the system were 7.47 g/m2.day, 3.17 g/m2.day, 1.43 g/m2.day, 0.12 g/m2.day, respectively. The results showed that the concentration of pollutants in effluents is significantly reduced and meet the national standard type A of QCVN 14:2008/BTNMT in both HSSFCW and VFCW models. The removal efficiencies in HSSFCW and SVFCW for SS: 88.7% and 92.4%; BOD5: 95.3% and 92.6%; COD: 94.3% and 92.6%; TN: 54.1% and 47.5%; N-NO3-: 38.4% and 33.6%; TP: 73.5% and 63.2%; P-PO43-: 87.6% and 59.7%, respectively. In general, the HSSFCW model has a relatively higher pollutant removal efficiency than the VFCW model, except for the SS. good growth and high biomass yield of Napier grass had been observed in the experimental systems. This study suggested that combusted beehive charcoal residues could be reused as bed substrate in constructed wetlands. Besides, Napier grass might also be a potential plant associated with subsurface flow constructed wetlands to treat domestic wastewater.
ẢNH HƯỞNG CỦA MẬT ĐỘ VÀ TẦN SUẤT CHO ĂN ĐẾN HIỆU QUẢ ƯƠNG GIỐNG VÀ STRESS Ở CÁ LEO – Wallago attu (Bloch & Schneider, 1801)
Authors: Nghĩa Võ Đức , Thành Nguyễn Đức , An Lê Thị Thu , Hiệp Phan Thanh , Huy Nguyễn Văn
Published: November 2021

Nhằm xác định ảnh hưởng của mật độ và tần suất cho ăn đến sinh trưởng và tỉ lệ sống cá Leo Wallago attu giai đoạn ương giống, thí nghiệm được tiến hành với 5 mức mật độ (1, 2, 4, 8 và 16 con/L) và các tần suất cho ăn (1, 2, 3, 4 và 5 lần/ngày). Kết quả nghiên cứu cho thấy mật độ ương và tần suất cho ăn đã ảnh hưởng có ý nghĩa thống kê đến tỉ lệ sống của cá thí nghiệm. Tỉ lệ sống của cá giảm ở mật độ ương nuôi cao (p<0,05). Tỉ lệ ăn thịt đồng loại giảm ở các nghiệm thức mật độ nuôi thấp. Tần suất cho cá ăn có tương quan thuận với tỉ lệ sống, tỉ lệ sống của cá tăng trên 50% khi tăng số lần cho ăn lên 3 – 5 ngày/lần. Tỉ lệ ăn thịt đồng loại của cá có mối tương quan nghịch với tần suất cho ăn. Nồng độ cortisol trong máu cá được xem như chỉ thị đối với mức độ stress của cá.  Kết quả của nghiên cứu này cho thấy rằng nồng độ cortisol của cá Leo ở mật độ nuôi cao và tần suất cho ăn 1 và 2 lần/ngày cao hơn so với những nghiệm thức còn lại. Do vậy, mức độ stress của cá Leo có thể được xem như một trong những yếu tố chính dẫn đến hiện tượng ăn thịt lẫn nhau và làm giảm tỉ lệ sống đối với loài cá này ở giai đoạn giống. Những kết quả của nghiên cứu này có thể cung cấp thông tin hữu ích nhằm nâng cao hiệu quả của việc ương nuôi cá Leo giống thông qua quản lý mật độ nuôi và tần suất cho ăn.

ABSTRACT

In order to elucidate the effects of stocking density and feeding frequency on the growth and survival of Wallago attu, post-hatch larvae were stocked at different densities (1, 2, 4, 8 and 16 individuals per liter) and fed with (1, 2, 3, 4 and 5-times per day). The results indicate that stocking density and feeding frequency had significant influences on the survival rate of the larvae (p<0.05). In particular, the survival rate of larvae decreased at trials with high stocking density (p<0.05) due to the cannibalism. The percentage of cannibalism decreased in treatments with low stocking densities. Regarding effects of feeding frequency, the proportionality between the survival rate of larvae and high feeding frequency was observed in this study (p<0.05). The survival rate of larvae reached 50% when fish were fed 3 -5 times per day. The cannibalism had negative relationship with frequency of daily feeding. The cortisol concentration in fish blood is considered as an indicator of stress levels of fish. The results of this study indicated that cortisol concentration of W. attu reared at high stocking density and fed 1-2 times/day was higher than that in other treatments. Therefore, stress levels of W. attu could be one of the main factors causing cannibalism and reduction of survival rate at larval stages. This study provided useful information to enhance the effectiveness of larval rearing of W. attu via controlling stocking density and feeding frequency.
ẢNH HƯỞNG CỦA NHIỆT ĐỘ VÀ ĐỘ MẶN ĐẾN SỰ PHÁT TRIỂN PHÔI, TỶ LỆ NỞ CỦA TRỨNG CÁ NÂU (Scatophagus argus Linnaeus, 1766)
Authors: Minh Nguyễn Tử , Huy Nguyễn Văn , Hường Trần Thị Diệu , Tuệ Lê Minh
Published: November 2021

Nghiên cứu được thực hiện nhằm tìm ra điều kiện tối ưu về nhiệt độ và độ mặn đến sự phát triển phôi và tỷ lệ nở của trứng cá Nâu Scatophagus argus. Thí nghiệm thứ nhất được tiến hành với ba mức nhiệt độ khác nhau là 24oC, 28oC và 32oC. Thí nghiệm thứ hai ấp trứng ở bốn mức độ mặn khác nhau là 20‰, 24‰, 28‰, 32‰. Mỗi thí nghiệm được thực hiện theo phương pháp thiết kế ngẫu nhiên hoàn toàn với bốn lần lặp lại. Kết quả thí nghiệm chỉ ra rằng tỷ lệ nở cao nhất và tỷ lệ dị hình thấp nhất khi ấp ở nhiệt độ 28oC và sai khác có ý nghĩa thống kê (p<0,05) với các nghiệm thức nhiệt độ 24oC và 32oC. Tương tự, sự phát triển phôi và tỷ lệ nở đạt kết quả tốt hơn khi ấp ở độ mặn 28‰ so với các nghiệm thức còn lại (p<0,05). Vì vậy, nghiên cứu này khuyến cáo rằng, quá trình phát triển phôi và tỷ lệ nở của trứng cá Nâu đạt kết quả tốt hơn khi được ấp ở nhiệt độ 28oC và độ mặn 28‰.

ABSTRACT

This study aims to determine the optimal conditions for temperature and salinity on embryonic development and hatching rate of spotted scat Scatophagus argus. The first experiment was conducted at three different temperature treatments at 24oC, 28oC, 32oC. The second experiment incubated eggs at four different salinity treatments at 20‰, 24‰, 28‰, 32‰. Each experiment was performed using the completely randomized design with four replicates. The results indicated that the highest hatching rate (82,4 ± 3,5%) and lowest deformity rate (4,5 ± 0,4%) was incubated at 28oC compared to other treatments of 24oC and 32oC (p<0,05). Similarly, the embryonic development and hatching rate of spotted scat showed a better development at salinity 28‰ than those at 20‰, 24‰, and 32‰ (p<0,05). The present study recommended that the embryonic development and hatching rate of spotted scat achieved a better result at temperature 28oC và salinity 28‰.