bluuebunny/crossref_metadata_2025 huggingface dataset:
Prevalence of Oral Problems among Patients with Type II Diabetes Mellitus in the Selected Urban Area of Vellore City, Tamil Nadu
Authors: Dorathy Irene , Siva Rajeshwari , Chacko Rabin , Sebastian Tunny
Published: May 2022

There is a rapid increase in diabetes mellitus worldwide causing premature deaths (1.6 million deaths in 2016) due to complications of the disease. India is said to have a greater number of diabetics, and diabetes remains one of the leading causes of death due to complications in India. Poor glycaemic control in patients not only affects their heart, kidneys, eyes and nerves but also affects the oral cavity. Periodontal disease is considered the sixth complication of diabetes mellitus, and it is seldom addressed. This study was conducted to assess the extent of oral problems amongst the clients with Type II diabetes mellitus in the selected urban area of Vellore district. A total of 150 samples were selected using simple random technique method. Informed consent was obtained from every subject, and the study was approved by the institutional review board. Data were collected using a structured pro forma, and a thorough oral examination was done to identify oral problems. The data were analysed using SPSS and were presented with explanatory statements in tables and graphs. The study findings revealed that the prevalence of periodontitis was high (64.7%) amongst the Type II diabetes mellitus and half of the subjects (53%) had one or the other oral problems such as calculus, stains dental caries, bleeding or swollen gum, gum recession and loose tooth or missing tooth. Regular dental check-up is mandatory for all diabetics, and oral health education is much required for better glycaemic control which will help to reduce the mortality rate and country's burden.
Benzodiazepine withdrawal catatonia
Authors: Majumder Uttam , Layek Avik K.
Published: May 2022

Catatonia is a diagnostic entity of a neuropsychiatric cluster of symptoms that can occur in a number of different psychiatric, neurologic, and metabolic disorders. Benzodiazepines remain the mainstay of the treatment of catatonia through their possible effect on the gamma-aminobutyric acid (GABA) receptor modulation in the central nervous system (CNS). Rarely, patients have been seen to manifest catatonic symptoms when they face sudden withdrawal from long-term benzodiazepine treatment. Here, we have presented two such cases of different clinical profiles where following benzodiazepine withdrawal, sudden catatonic symptoms emerged that responded quickly on re-administration of benzodiazepines.
When Doom is Invincible and Not Easily Perceptible
Authors: Chakraborty Debabrata , Sengupta Asok , Chanda Ranajoy , Sen Sagar , Goenka Samit , Bhaumik Sanjay
Published: May 2022

A 47-year-old -lady without known co-morbidity had presented with a one-month history of respiratory distress and headache. Someone incidentally started her with antitubercular drugs and steroids outside our hospital. Her routine CT scan of brain was unremarkable. She had a partial response to the same, but she presented to us with an increased headache after a month. We found her to have diffuse nodular pulmonary involvement with bilateral pleural effusion. The pleural fluid diagnostic evaluation revealed adenocarcinoma of the lung. The MRI of the brain revealed multiple nodular involvements consistent with the rare intracranial miliary metastasis. Our case underscores the importance of careful history taking and evaluation of patients with respiratory distress along with headaches (our patient lacked a classical history of miliary tuberculosis). We may overlook the silent brain metastasis on routine CT scans of the brain and cause an important delay in diagnostic evaluation and intervention in life-threatening diseases, like our case.
Clinical and Morphological Evaluation of Permanent First Molars in Turkey
Authors: Kılinç G , Çetin M , Ertunç FÜE , Ateşçi AA
Published: May 2022

Aim:

The aim of this study was to investigate the pit and fissure morphology of the permanent first molars (PFMs) in the dentition of 7- to 12-year-old patients in Turkish children.

Patients and Methods:

The study was conducted on 706 patients who attended the Dokuz Eylul University Child Clinic. Examinations of the patients were carried out with dental unit light, mouth mirror, and probe by two dentists. Age, gender, plaque scores, pit and fissure morphology, caries, restorations, and missing teeth were recorded.

Results:

Of the 706 patients included in this study, 441 (62.5%) of them have affected PFMs. Intermediate type fissure morphology (57.5%) was seen as the most common type. A positive correlation was observed between the age and the caries experience (p = 0.000). Patients with deep pits and fissure morphology have more caries affected teeth than patients with shallow pit and fissure morphology, and the difference was statistically significant (p = 0.000). Patients with deep pits and fissure morphology have significantly more plaque accumulation on PFMs compared to the patients with shallow and intermediate fissure morphology (p = 0.000).

Conclusions:

Despite the limitations of the study, we can conclude that the patients with deep pit-fissure morphology are more susceptible to caries development and plaque accumulation than the patients with shallow and intermediate type pit and fissure morphology.
Nasotracheal Intubation Performance with the McGrath Videolaryngoscope versus Macintosh Laryngoscope in Oral and Maxillofacial Surgery- An Observational Study
Authors: Şengel N , Karabulut G , Kavuncuoğlu D , Selmi N H , Şivgin V , Toprak ME
Published: May 2022

Background and Aim:

Nasotracheal intubation is the main route to secure the airway in oral and maxillofacial surgery patients. This study was aimed to compare the intubation times and glottis visualization of McGrath video laryngoscope with the Macintosh laryngoscope for routine nasotracheal intubation.

Materials and Methods:

Records of seventy-one ASA (American Society of Anesthesiologists) I-II patients were evaluated and allocated into two groups (McGrath video laryngoscope (VL) and Macintosh groups). Intubation times, modified intubation difficulty scale (MIDS) scores, and hemodynamic parameters (heart rate and mean arterial pressure) were compared after the anesthesia induction and the intubation.

Results:

Mean intubation time in the McGrath group (24.9 ± 5.9 seconds) was significantly lower than that of the Macintosh group (28 ± 6.2 seconds; P = 0.037). Magill forceps were needed less in the McGrath group compared to the Macintosh group (13.89% vs. 42.86%; P = 0.009). Total MIDS scores were similar (P = 0.778). There was no significant difference in the hemodynamic parameters between the groups.

Conclusion:

The McGrath VL significantly reduced the intubation time and the use of Magill forceps compared with Macintosh direct laryngoscope and can be utilised effectively for routine nasotracheal intubation.
Epidemiological data on nutritional disorders and outcomes in hospitalized Thai children: an analysis of data from the National Health Database 2015-2019
Authors: Saengnipanthkul Suchaorn , Phosuwattanakul Jeeraparn , Thepsuthammarat Kaewjai , Chongviriyaphan Nalinee
Published: May 2022

OBJECTIVES: Malnutrition in hospitalized patients is a frequently overlooked health issue. We aimed to assess the prevalence and pattern of nutritional disorders in hospitalized Thai children from the National Health Database.METHODS: Hospitalized children aged 1 month to 18 years diagnosed with nutritional disorders between 2015 and 2019 were retrospectively reviewed using the National Health Security Office data. Based on the International Classification of Diseases, 10th revision, Clinical Modification, nutritional disorders were classified into 3 major forms of malnutrition: undernutrition (E40-E46), overweight and obesity (E66), and micronutrient deficiencies (D50-D53, E50-E56, E58, E60-E61, and E63).RESULTS: Out of 5,188,033 hospitalized children, malnutrition was identified in 115,254 (2.2%). Protein-energy malnutrition (PEM), overweight and obesity, and micronutrient deficiencies were prevalent in 0.21%, 0.27%, and 1.81%, respectively. Among those with micronutrient deficiencies, 95.0% had iron deficiency anemia, 2.2% had vitamin D deficiency, and 0.7% had zinc deficiency. Children aged under 5 years mostly had PEM, followed by iron deficiency anemia. Teenagers commonly had obesity and vitamin D deficiency. Patients with PEM who were admitted with common diseases had significantly longer hospital stays and higher hospital costs and mortality rates than those without PEM.CONCLUSIONS: Hospitalized children had various nutritional disorders, particularly PEM, which was associated with higher morbidity and mortality. Nutritional screening tools should be utilized for the early detection and treatment of malnutrition. Specific International Classification of Diseases codes for nutritional care services and intervention should be available. Additionally, nutritional interventions should be reimbursed, along with nutritional education and empowerment of healthcare providers, to improve hospital care service and improve patient outcomes.
Optimization of process parameters in micro milling of Ti4Al4Mo2Sn using nano Al2O3 additives based minimum quantity cooling lubrication
Authors: Nithiyanandam M. , Rahamathullah I. , Ashok Raj R.
Published: May 2022

ABSTRACT. Aerospace and automotive industries employ Ti4Al4Mo2Sn material in many applications due to its properties of better strength to weight ratio and high corrosion resistance. Ti4Al4Mo2Sn finds itself difficult to cut materials due to its physical and chemical properties and is prone to more heat generation during machining. The more generation of heat affects the machined material surface quality and other related properties. In this investigation, the thermal conductivity and stability of Al2O3/Water based nanofluids are studied to select the best composition of nanofluid for transferring heat. The thermal conductivity and stability of the nanofluid for a duration of 30 days are computed by employing the KD2 thermal property meter and pH meter, respectively. Thermal conductivity and stability of the Water/4.5 vol.% Al2O3 nanofluid are found to be better than other combination of nanofluids. In the present study, optimizing the micro milling process parameters on Ti4Al4Mo2Sn material with Minimum quantity cooling lubrication (MQL) is focused. The input parameters selected for this micro milling process are spindle speed, feed rate, depth of cut and Water/4.5vol.% Al2O3 nanofluid and the output parameters selected are cutting forces in X(Fx) and Y(Fy) directions, tool wear rate (TWR) and surface roughness (SR). The optimization is done with the help of grey relational analysis (GRA) by using L9 Orthogonal Array (OA) Taguchi design. The obtained sequence of influencing parameters are feed rate per tooth, Al2O3nanofluid, spindle speed and depth of cut. The percentage of grey relational grade (GRG) for prediction and experimental is 0.721 and 0.957. The percentage of improvement of GRG is 12.46.

 

KEY WORDS: Ti4Al4Mo2Sn, Al2O3, Thermal conductivity, Grey relational analysis, Grey relational grade

 

Bull. Chem. Soc. Ethiop. 2022, 36(2), 339-351.                                                               

DOI: https://dx.doi.org/10.4314/bcse.v36i2.8
A Taguchi based iterative wing structural design for a low speed, hybrid UAV
Authors: Dada O.A. , Makinde O.M. , Ubadike O.C. , Jemitola P.O.
Published: May 2022

An iterative structural design process for the conventional, composite wing of a low speed, hybrid Unmanned Aerial Vehicle (UAV) is presented in this paper. The relevant design goals are light weight, strength and stiffness derived from the customer specifications, conceptual design and STANAG-4671 airworthiness standards. To achieve the design goals, a modified Taguchi model was applied in conducting iterative Finite Element Analysis of the loads and stresses on the wing model, using ABAQUS CAE. In this analysis, the pitch of the rib and thicknesses of the spar and skin were applied as control factors in three levels, leading to an L9 orthogonal array. Mass, maximum deflection and Tsai-Hill failure index of the wing structure were measured as responses. The result shows that varying the skin thickness had the most impact on the wing mass, failure index and maximum deflection. The design goal of wing mass- less than 2.5kg, deflection of 10% and Tsai-Hill failure index value- less than 1 were achieved after 9 iterations.
Performance assessment of vegetable oil-based cutting fluid developed from palm kernel oil using multi-response optimisation technique
Authors: Abutu J. , Oluleye M.A. , Okechukwu C. , Salawu S.I. , Dame B. , Unamba K.U.
Published: May 2022

In this work, locally sourced palm kernel oil was characterised and thereafter formulated with the aid of full factorial L1624 design method. The performances of the formulated and mineral cutting fluids were evaluated by examining the material removal rate, cutting temperature and surface roughness using Grey relational analysis (GRA) and Behnken’s design (L1533) design technique. The experimental results obtained indicate that the properties of the palm kernel oil and formulated cutting fluid falls within the preferred range for vegetable-based cutting fluids as reported in literatures. The GRA results showed an optimal turning condition of depth of cut (1.5mm), feed rate (0.3mm/rev) and cutting speed (600rev/min) for palm kernel oil-based cutting fluid while depth of cut (1.5mm), feed rate (0.2mm/rev) and cutting speed (800rev/min) is the optimal condition for mineral oil-based cutting fluid. Also, the chip formation analysis revealed continuous chips which are in conformity with ISO 3685 standards.
Risks of cosmetics and level of awareness of both genders in Libya
Authors: Korbag S. M. , Korbag I.M. , Iqrin A.B.
Published: May 2022

This study aimed to find out the level of awareness of the harmful effects of cosmetics in Libya. The study also included the effects of cosmetics on health. A structured questionnaire was the primary method used to collect the data and which were analyzed descriptively. The questionnaire was administered to a total of 500 participants of both sexes, chosen randomly in ten Libyan cities. The results showed that 1 % of the women were aware of the presence of toxic substances and carcinogens while 99 % were not aware of the harmful effects of cosmetics. The responses indicated a negative sign of the lack of awareness of the dangers of cosmetics among the citizens. Also, a survey revealed that the Ministries of Health and Education had failed to raise awareness and knowledge of the negative and harmful effects of cosmetics in the Libyan society. Therefore, we encourage the institutions concerned with monitoring and to note the exemption for their and others, and to inform them of the dangers of these products circulating in the Libyan markets, which pose a great danger to the health of the citizens.
Dynamic analysis and computer simulation of interior permanent magnet synchronous motor with intermittent loading
Authors: Ezeonye C.S. , Nkan I.E. , Okpo E.E. , Okoro O. I.
Published: May 2022

This paper presents the dynamic analysis and computer simulation of interior permanent magnet synchronous motor (IPMSM) with intermittent loading. This objective was realized with the aid of MATLAB m.file function program, which is based on an explicit Runge-Kutta fourth order numerical method to solve a set of first order differential system of equations describing electrical and mechanical models of IPMSM. The IPMSM used in this research is of specifications 3-phase, 2 KW, 50 Hz, 4 poles, 240 V. The IPMSM differential equations are expressed in rotor reference frame with q- and d-axes stator currents, mechanical rotor speed, and rotor angular position as state variables. The analysis and simulation of the motor is initially done with no-load and with the parameters as given in Table 1. Subsequently, the motor was loaded and parameter variations were carried out. The result of a typical responses of the motor were obtained which showed that IPMSM has more ripples, overshoot, slower response but can carry load of up to 90 Nm. The effect of higher stator resistance shows that it minimizes the magnitude of ripple of the output characteristics (torque and power) but takes more time to attain the same steady state value. In the same vein, variation of moment of inertia has little or no effect on the output characteristics of the motor. The findings obtained in this research work as compared to other literatures showed that with the parameters recommended, an improved design and operation of IPMSM will be obtained for best performance and without unsynchronous operation due to overloading.
Biofuel production from locally sourced roselle (Hibiscus Sabdariffa L.) seed oil using transesterification process
Authors: Arowosafe K.O. , Bamgboye A.I. , Adesanya A.A. , Odugbose B.D. , Olannye U.D. , Fatoye O.V.
Published: May 2022

As a solution to the decreasing stocks of fossil fuels and the environmental unfriendliness arising from its combustion, alternative fuels from natural sources are emerging. Biofuel has drawn considerable attention as a substitute fuel for diesel engines among these various potential resources as it is renewable, non-toxic, eco-friendly etc. This research assessed the production of biofuel from crude roselle oil. Using solvent extraction technique, oil was obtained from roselle seed and the properties evaluated. For this purpose, N-hexane and pet-ether solutions were used. The extracted oil was transesterified. The transesterification reaction was performed at a 6:1 methanol / oil molar ratio, with a catalyst of 1 percent (w / w) CaO / ZnO. The crude roselle oil obtained for use in the production of biofuels was clear, viscous and yellowish in colour, and the oil yield was 13.56 %. The result of the transesterification reaction was a transparent yellowish colour liquid (biofuel) and the percentage yield was 52.77 %. The flash point of 206 oC, pour point of -3 oC, cloud point of 4oC, cetane number of 5, fire point of 210 oC, specific gravity of 0.895 obtained at 29 oC, kinematic viscosity of 4.56 mm2/s, Iodine Value of 0.39 gI2/100g, saponification value of 0.16 MgKOH/g, acid value of 0.42 MgKOH/g and density of 0.874 g/cm3 were all within the ASTM D6751 specification for biodiesel fuel. Roselle oil methyl ester was found to have good fuel quality and has potential to fuel a diesel powered engine.
Shear-stud restrained composite slab strength prediction model
Authors: Mohammed K. , Alkali A.M. , Bulu K.
Published: May 2022

The use of shear-stud in composite slab (CS) construction can significantly enhances its longitudinal shear capacity. However, the strength capacity determination of such complex construction is still marred with the capital-intensive challenge resulting from the complex laboratory procedures for establishing its longitudinal shear capacity. To address this challenge, this article develops a simplified numerical function for determining longitudinal shear capacity for CS with shear stud. This study considers slope-intercept method for the longitudinal shear estimate and the adaptation of rational approach in developing the performance function. Furthermore, limit state function was from the use of shear capacity violation that considers experimental failure load (FL) value and design load estimated form the shear contributions. The resulting outputs from the rational analysis facilitated the formulation of numerical function for the determination of FL in a more simplified form. The developed FL algorithm exhibits strong performance in determining the alternate CS failure load though there is stillroom for further improvement especially if span length would be taken into consideration. Further development that incorporates span length might give much favorable result in determining CS strength especially when considering slope-intercept method
Tensile and microstructural properties of unidirectional coir bio-derived epoxy composites
Authors: Madueke C. I. , Umunakwe R. , Borisade S.G. , Mbah O.M.
Published: May 2022

The study investigates the possibilities of reinforcing bio-derived epoxy (bio-epoxy) polymer with unidirectional arrays of coir fibre using hand layup. The coir fibres were unidirectionally prepared in two layers. The tensile properties such as strength, Young’s modulus and elongation at break were found to be 43.83 MPa, 2.4 GPa and 2.72 % respectively. The tensile strength of coir/bio-epoxy composite was higher than the unreinforced bio-epoxy resin. The fibre volume fraction of the composites obtained using ImageJ on an 8-bit grey scale was 34%. The optical microstructure of the composites shows the distribution of the fibres within the bio-epoxy matrix.
Benefits, disadvantages and challenges of virtual conferencing in the COVID-19 era: Adjusting to the new normal
Authors: Ogunmodede J.A. , Ogunmodede A.J. , Buhari O.I.N. , Dele-Ojo B.F. , Omotoso A.B. , Agede O.A. , Omotoso A.B.O.
Published: May 2022

Objective: The COVID-19 pandemic has had tremendous effect on the medical and scientific community. Measures instituted to curb the spread of the disease such as physical distancing and ban on large gatherings have significantly altered conferencing activities of medical professional associations. With no end in sight to the pandemic, it is certain that medical professional associations may have to make do with purely virtual or hybrid conferencing for some time to come. The objective of this paper is to highlight the benefits, disadvantages and challenges of virtual conferencingMethods: We searched Pubmed, Embase, Scopus, and AJOL databases from January 1, 2021 to December 31, 2021 for publications describing the benefits, disadvantages and challenges of virtual conferencing during the pandemic. This, together with authors' experience formed the resource base for this work.Conclusion: We propose ways the scientific community in Nigeria can maximize the virtual conferencing while the pandemic lasts. We also advocate increased discussion about how to improve the virtual conferencing culture and the development of guidelines for purely virtual or hybrid scientific conferences.
Dicephalous in a bunaji calf
Authors: Ikye-Tor P.M. , Ikye-Tor T. , Korzerzer R.M. , Per M.F.
Published: May 2022

The present study depicts a rare case of a dicephalic conjoined anomaly in a bunaji calf. In this case report, we describe a dicephalic female twin calf from a pregnant bunaji cow (Bos indicus) during the post-mortem examination. Detailed external anatomical characteristics were assessed through a detailed macroscopic examination. The two heads were joined at the level of the ramus of the mandible, extending from the ramus of the mandible to the point of the mandibular condyles. The external features comprised of a single thorax, two heads, with the right head slightly bigger than the left head, four eyes, two ears, four nostrils, two forelimbs and two hindlimbs. There was a duplication of the tongue with a common base. A foramen magnum was present at the cervical region for the passage of the spinal cord. In conclusion, the case report describes a unique case of female dicephalic conjoined twinning congenital abnormally.
Prevalence of parasitic gastrointestinal diseases of poultry diagnosed in the Veterinary Teaching Hospital, University of Jos, Nigeria
Authors: Ameji N.O. , Oladele O.O. , Adanu A.W. , Oshadu D.O. , Patrobas M.N. , Gurumyen G.Y. , Biallah M.B.
Published: May 2022

The adverse effects of parasitic gastrointestinal diseases on poultry production are enormous, especially where birds are kept under extensive or semi-intensive systems, but the diseases are rarely recognized as primary problems except during necropsy examinations. A two-year longitudinal cohort prospective study was conducted from October 2018 to September 2020 to determine the prevalence and diagnostic features of parasitic gastrointestinal diseases of poultry in the Veterinary Teaching Hospital, University of Jos, Plateau State, Nigeria. A total of 2,989 cases were diagnosed over the study period, out of which 749 (25.1%) were parasitic gastrointestinal diseases. Protozoan gastrointestinal diseases were more prevalent among cases of parasitic gastrointestinal diseases with a total of 610 (81.4%), while gastrointestinal helminths had 139 (18.6%) cases. The prevalence of helminthiasis was more in the months of August, September, December, January and February, while gastrointestinal protozoan diseases were more in the months of April, May, June, July, October and November. Helminths species commonly diagnosed were Ascaridia galli (8.3%); Heterakis gallinarum (4.7%); Capillaria spp (1.9%); Tetramere spp. (0.5%), Gongylonema spp. (0.1%), Strongyloides avium (0.1%), Raillietina spp (1.5%), Hymenolepis carioca (1.1%) and Davainea spp. (0.4%). The intestinal protozoan parasites of poultry predominantly diagnosed were Eimeria spp. (78.0%) but Histomonas meleagridis (2.7%), Trichomonas spp (0.7%) and Hexamita spp. (0.1%) were also seen. It is concluded that the prevalence of parasitic gastrointestinal diseases of poultry was high and could be some of the leading causes of low productivity and mortality in the study area even in commercial poultry farms under intensive production systems. It is recommended that attention should be given to good litter management where birds are reared on the floor to prevent the multiplication of the developmental stages of the gastrointestinal parasites in the environment, as well as the adoption of other control strategies against parasitic gastrointestinal diseases of poultry.
Seroprevalence of avian leukosis virus in local chickens in five live bird markets, Kaduna metropolis, North-western Nigeria
Authors: Bitrus I. , Bakam J.D. , Wungak Y.S. , Bashir M. , Shittu I. , Meseko C.A.
Published: May 2022

Avian leukosis virus is recognized as an important viral pathogen in the poultry industry, resulting in salient severe economic losses due to reduced production, uneven flock growth rates, reduced growth, and immunosuppression which predispose affected birds to other infections. This study examined the seroprevalence of avian leukosis virus (ALV) in local chickens (LC) in 5 different live bird markets (LBMs) in Kaduna Metropolis. A total of 276 sera were tested for ALV p27 antigen using enzyme-linked immunosorbent assay (ELISA). An overall seroprevalence of 28.3% (78/276) was recorded in the study. At the market level, the seroprevalence of 35% (21/60), 30% (18/60), 32% (16/50), 28.6% (16/56), and 14% (7/50) were recorded for Sabon Tasha, Central market, Railway station, Kawo and Sokoto Road LBMs respectively. With regards to sex, female LC showed a significantly higher prevalence of 30.5% (46/105) compared to male chickens 26.9% (46/171) with no significant difference (P > 0.05) observed. This study established the presence of antigen to ALV in local chickens sold in LBMs. We recommend surveillance and further studies on the isolation, molecular characterization and pathogenicity of ALV in the study area.
Dinâmica populacional de bruquíneos em frutos de Cordia trichotoma no bioma Mata Atlântica
Authors: Pessotto Marciane Danniela Fleck , Costa Ervandil Corrêa
Published: May 2022

Os coleópteros da subfamília Bruchinae podem ocasionar danos às sementes de Cordia trichotoma (Vell.) Arrab. ex Steud. (Boraginaceae), principalmente no estágio larval. O controle biológico natural ocorre pela ação de himenópteros parasitoides. O objetivo dessa pesquisa foi estudar os ciclos populacionais dos bruquíneos e dos himenópteros parasitoides associados, bem como relacionar a sua ocorrência às variáveis meteorológicas de temperatura, umidade relativa do ar e precipitação. Em 2015 e 2016 foram coletados frutos de sete árvores, localizadas no bioma Mata Atlântica, município de Taquaruçu do Sul, RS, Brasil. Os bruquíneos foram identificados como Amblycerus longesuturalis (Pic, 1954) e Amblycerus profaupar Ribeiro-Costa, 2000 (Chrysomelidae: Bruchinae). As oviposições e larvas dos bruquíneos foram visualizadas nos frutos em todas as coletas realizadas. A. profaupar foi a espécie mais abundante em ambos os anos de avaliação, tendo o pico de emergência nos frutos coletados no mês de junho. As larvas dos bruquíneos são parasitadas por himenópteros dos gêneros Bracon, Mirax, Omeganastatus e Triapsis. De modo geral, a umidade relativa do ar alta favorece a oviposição dos bruquíneos, enquanto que temperaturas baixas favorecem a presença de pupas de espécies de Amblycerus em frutos de C. trichotoma.
Tối ưu hóa điều kiện xử lý enzyme pectinase và lên men rượu vang mãng cầu xiêm (Annona muricata L.)
Authors: Châu Lưu Minh , Vân Dương Thị Thảo , Duyên Lý Thị Thùy , Thạnh Nguyễn Ngọc , Phong Huỳnh Xuân
Published: May 2022

Nghiên cứu nhằm mục tiêu xác định điều kiện xử lý enzyme pectinase thích hợp và xác định các điều kiện lên men tối ưu để sản xuất rượu vang mãng cầu xiêm (Annona muricata L.) thông qua các mô hình thống kê. Lên men dịch quả mãng cầu xiêm (đã được xử lý enzyme pectinase 0.3% trong một giờ) với 11 dòng nấm men thử nghiệm cho thấy dòng nấm men FBY009 có khả năng lên men tốt nhất với hàm lượng ethanol là 12.71% v/v và được đánh giá cảm quan tốt. Ảnh hưởng của 6 nhân tố đến quá trình lên men của dòng nấm men FBY009 đối với quá trình lên men được thực hiện theo mô hình Plackett-Burman đã xác định được 02 nhân tố, bao gồm độ Brix và hàm lượng (NH4)2SO4, có tác động có ý nghĩa đến hàm lượng ethanol được hình thành. Tối ưu hóa điều kiện lên men bằng cách bổ sung 0.96g/L (NH4)2SO4 và điều chỉnh ở 23.77°Brix cho sản phẩm rượu vang mãng cầu xiêm có hàm lượng ethanol ở mức 12.88% v/v. Kết quả từ nghiên cứu cho thấy khả năng phát triển sản phẩm rượu vang từ mãng cầu xiêm và là tiền đề để sản xuất ở quy mô thử nghiệm.
Máy phát điện ma sát nano: Một giải pháp năng lượng tiềm năng
Authors: Hải Phan , Hòa Phan Nguyễn , Tâm Hồ Anh , Thắng Phạm Đức
Published: May 2022

Cuộc cách mạng công nghiệp lần thứ tư và sự phổ biến rộng rãi của các hệ thống kết nối vạn vật IOT, nhu cầu về những thiết bị có độ linh động cao và tự cấp nguồn được cực kỳ lưu tâm. Vào năm 2012, một công nghệ chuyển đổi năng lượng mới có tên Máy phát điện ma sát nano (TENG) đã được phát minh ra bởi nhóm của Wang (as cited in Fan, Tian, & Wang, 2012). Máy phát điện ma sát nano là thiết bị có thể chuyển đổi một cách hiệu quả các nguồn năng lượng cơ học lãng phí quanh con người thành điện năng. Dựa trên sự hợp tác của hiện tượng nhiễm điện do cọ sát và cảm ứng tĩnh điện, các nhà nghiên cứu đã phát triển bốn cấu hình cơ bản của TENG là: cấu hình tiếp xúc dọc, cấu hình trượt, cấu hình đơn điện cực và cấu hình điện cực treo. Trong bài báo này, các kiến thức cơ bản, vật liệu và ứng dụng của TENG được thảo luận cơ bản. Ngoài ra, mô hình tiếp xúc dọc cơ bản của máy phát điện ma sát nano được áp dụng để lắp ráp thử nghiệm máy phát điện ma sát nano sử dụng màng sợi nano PVC và nhôm thương phẩm. Tín hiệu đầu ra cho kết quả khả quan với hiệu điện thế 31.7V và dòng điện 6.2µA ở ngoại lực 10N.
Vai trò của hạt từ phủ kháng thể CD3/CD28 và IL-2 lên sự tăng sinh tế bào đơn nhân máu ngoại vi người (PBMC)
Authors: Anh Phùng Thị Việt , Thảo Võ Nguyễn Thanh , Quân Nguyễn Đăng
Published: May 2022

Liệu pháp miễn dịch được coi là một phương pháp đầy hứa hẹn trong điều trị ung thư. Tế bào miễn dịch của bệnh nhân được phân lập, cảm ứng tăng sinh, biến đổi thành các tế bào chức năng khác nhau và sau đó được đưa trở lại người bệnh. Các tế bào miễn dịch được tăng sinh ex vivo có thể kể đến như tế bào giết tự nhiên (NK cell), tế bào biểu hiện thụ thể kháng nguyên dạng khảm (CART cell) và tế bào biểu hiện thụ thể T được biến đổi (TCR cell). Việc ứng dụng liệu pháp miễn dịch tế bào đòi hỏi phải nuôi và tăng sinh tế bào miễn dịch in vitro. Nghiên cứu này khảo sát ảnh hưởng của các nồng độ IL-2 khác nhau lên sự tăng sinh tế bào PBMC cũng như khả năng kích hoạt tế bào PBMC khi sử dụng hạt từ phủ CD3/CD28 với tỉ lệ 01 hạt từ: 03 tế bào trong 04 ngày nuôi cấy. Kết quả nghiên cứu cho thấy, không có sự khác biệt đáng kể lên sự tăng sinh tế bào PBMC ở các nồng độ IL-2 khác nhau trong 04 ngày đầu nuôi cấy. Việc bổ sung hạt từ phủ CD3/CD28 và 30U/mL IL-2 vào môi trường cho thấy có khả năng kích hoạt và tăng sinh tế bào, số lượng tế bào PBMC tăng gấp đôi sau 04 ngày kích hoạt trong đó quần thể CD3+ tăng gấp 03 lần đạt gần 70% trong quần thể tế bào PBMC, quần thể tế bào CD4+ và CD8+ cũng có sự tăng số lượng và đạt tỉ lệ tương đương nhau khoảng 30% mỗi loại.
Các yếu tố ảnh hưởng đến sai số trong dự báo tỷ suất sinh lời của cổ phiếu đơn lẻ: Ứng dụng học máy với Spark MLlib
Authors: Khoa Bùi Thành , Huỳnh Trần Trọng , Tùng Thái Duy , Dụng Nguyễn Ngọc , Đức Nguyễn Vũ
Published: May 2022

Mô hình định giá tài sản vốn (CAPM) lượng hóa mối quan hệ tuyến tính giữa lợi nhuận và rủi ro hệ thống của các tài sản rủi ro. CAPM là một trong những nền tảng lý thuyết của ngành tài chính hiện đại. Tuy nhiên, tính thực nghiệm của CAPM là một chủ đề gây tranh luận đối với các nhà nghiên cứu bởi vì CAPM sử dụng rất nhiều giả định mà khó có thể được đáp ứng trong thực tế. Xu hướng kết hợp trí tuệ nhân tạo và lý thuyết nền tảng tài chính đã tạo ra nhiều mô hình dự báo hiệu quả và phù hợp hơn trong thực nghiệm. Nghiên cứu này thực hiện nhằm 02 mục tiêu chính: Sử dụng thuật toán Support Vector Regression (SVR) trên nền tảng CAPM để dự báo tỷ suất sinh lời của các cổ phiếu riêng lẻ và xác định các yếu tố tác động đến sai số trong dự báo của mô hình kết hợp này. Nghiên cứu sử dụng dữ liệu của các công ty niêm yết trên thị trường chứng khoán Thành phố Hồ Chí Minh giai đoạn từ tháng 12/2012 đến tháng 09/2020, chu kỳ theo tháng. Nghiên cứu chia dữ liệu thành 02 giai đoạn: giai đoạn 01 sử dụng để tối ưu hóa các tham số và giai đoạn còn lại được sử dụng để đánh giá sai số của mô hình dựa trên Spark MLlib. Nghiên cứu chỉ ra rằng mô hình dự báo tỷ suất sinh lời của cổ phiếu sử dụng thuật toán SVR hiệu quả hơn so với CAPM; hơn nữa, nghiên cứu cũng phát hiện ra rằng yếu tố rủi ro đặc thù công ty (VAR), rủi ro tổng thể (SD), sai số của CAPM (RMSECAPM) và tỷ suất sinh lời trung bình (MEAN) là các yếu tố ảnh hưởng đến sự khác biệt giữa sai số dự báo của mô hình SVR đối với từng cổ phiếu đơn lẻ.
UI / UX Design Model for Student Complaint Handling Application Using Design Thinking Method (Case Study: STMIK Rosma Karawang)
Authors: Setiyani Lila , Tjandra Evelyn
Published: May 2022

The development of information technology is currently very rapid and unavoidable, especially in the world of education. Global demands require the education sector to constantly adjust technological developments with efforts to improve the quality of education, adjust the use of information and communication technology. STMIK Rosma is a university that utilizes computer technology. However, there are still shortcomings, namely the absence of a student complaint application so that the process of submitting student complaints is still running manually. This results in not recording student complaints, student complaint data not well documented, so that the college leadership of the campus cannot monitor the complaints submitted by students. This study aims to analyze the functional requirements of the STMIK Rosma student complaint application. The method used in this research is Design Thinking. The result of this research is the UI / UX design of the student complaint handling application (mobile application) at STMIK Rosma Karawang which is designed using the classic mockuplus tools. This research is expected to provide suggestions to universities to improve the process of handling student complaints.
Effects of Influencers on Social Media on Interest in Buying East Java Culinary
Authors: Rahayu Rahayu , Sudarmiatin Sudarmiatin
Published: May 2022

Abstract

This research study is to determine the effect of influencers on social media on interest in buying East Java cuisine. This is important so that consumers' perceptions of the reliability of influencer advertising on social media are known and their effect on audience interest in buying. An influencer's specific strategies and skills that must be adapted to attract consumer purchase intention to be effective across social media are important. This study was designed to examine and analyze the effectiveness of influencer promotions broadcast on social media in attracting consumer purchase intentions. The sample used was 225 respondents who were actively using social media in East Java, consisting of 130 female participants, 95 male participants, and most of them aged 18 to 24 years. Respondents' ratings illustrate that influencers who build their honesty and trustworthiness can change consumer behavior and purchase intentions. Attractiveness and relationship with the product there is a match. Optimism and agreement with the differences in the effectiveness of an influencer's advertising on consumer purchase intentions are also the focus of consumer assessments. The influencer's expertise which is reflected in knowledge and ability also has an impact on purchase intention. The perception of female respondents towards culinary promotions in East Java by influencers is more than that of men, this is due to the frequency of using the internet. Optimism and agreement with the differences in the effectiveness of an influencer's advertising on consumer purchase intentions are also the focus of consumer assessments. The influencer's expertise which is reflected in knowledge and ability also has an impact on purchase intention. The perception of female respondents towards culinary promotions in East Java by influencers is more than that of men, this is due to the frequency of using the internet. Optimism and agreement with the differences in the effectiveness of an influencer's advertising on consumer purchase intentions are also the focus of consumer assessments. The influencer's expertise which is reflected in knowledge and ability also has an impact on purchase intention. The perception of female respondents towards culinary promotions in East Java by influencers is more than that of men, this is due to the frequency of using the internet.
The Headaches of Case Study Research: A Discussion of Emerging Challenges and Possible Ways Out of the Pain
Authors: Glette Malin , Wiig Siri
Published: May 2022

Case study research is a widely-used approach in qualitative research. The advantages of case study research include its ability to investigate complex social phenomena and to handle dense data. However, it has several drawbacks, such as defining the case and ensuring rigour. The large variety in descriptions of case study implementation makes the application of case study research a challenge for novice and experienced researchers alike. The aim of this paper is to describe a novice’s foray into case study research, illustrating advantages, drawbacks, and applications of case study research through examples from a previously conducted case study. By mapping consistencies and differences in the case study descriptions, this paper offers a way for novice researchers to familiarize themselves with the range of case study perspectives and with the choices and considerations that must accompany the choice of case study research. This paper shows the definitional and structural challenges that case study researchers may face. We identified 14 descriptions of case study research with unclear or overlapping distinctions. Despite the large number of variations in case study descriptions, we singled out one main distinction: the distinction between multiple and single case studies. The sheer proliferation of how case study research should be conducted underlines the great responsibility case study researchers have when choosing an analytical and methodological approach and ensuring rigour in their research.
Towards More Equitable Classrooms: A Review of The Reflective Educator’s Guide to Classroom Research
Authors: Quinones Lourdes
Published: May 2022

This is a book review of The Reflective Educator’s Guide to Classroom Research: Learning to Teach and Teaching to Learn Through Practitioner Inquiry (Dana & Yendol-Hoppey, 2020), a non-fiction book written to inform and guide in-service and pre-service teachers from development of teaching inquiries through to publication and presentation of findings. The authors also address the role of inquiry in the creation of more equitable classrooms. The book is easy to read and goes right to the heart of the information that busy teachers need to engage in organized and reflective inquiry. The authors summarize and organize key information in visual formats for quick reference. The book is sequentially organized, with reflective exercises at the end of each chapter. Teachers move forward in their inquiry with step-by-step instructions and real teacher inquiry examples, many of which are qualitative inquiries.
Análise do uso da estereoscopia como ferramenta de intensificação do gênero de horror no filme "O Monstro da Lagoa Negra"
Authors: Dos Santos Tiago Eugenio
Published: May 2022

O presente estudo busca realizar uma análise geral do uso da estereoscopia como ferramenta de intensificação dos recursos discursivos do gênero de horror no caso específico do filme "O Mostro da Lagoa Negra" de 1954 dirigido por Jack Arnold. Esse filme se insere no contexto do auge da utilização da estereoscopia da década de 1950, na tentativa do cinema em competir com o novo fenômeno da televisão. O gênero do horror nasce na literatura e desde então vem se propagando em múltiplas plataformas, encontrando no cinema o veículo no qual melhor se expressa. Este estudo parte do pressuposto de que a estereoscopia poderia ser utilizada como ferramenta para acentuar algumas características do gênero de horror como o medo e a aproximação do objeto de terror. Ao final, são delineados pontos nos quais a estereoscopia foi bem utilizada e outros nos quais a técnica fica relegada a segundo plano.
Transtorno do espectro do autismo (TEA) e o mercado de trabalho
Authors: Lino Fernando de Velasco , E Silva Amanda Vida , Aziz Nura Tarek Ali Abdel , De Holanda Lorena Costa , De Sousa Isadora Silva , Paiva Ana Clara Moreira , Debuz Henrique Jochen
Published: May 2022

Transtorno do espectro do autismo (TEA) é um diagnóstico de condição de saúde mental e neurológica que tem origem nos primeiros anos de vida. Ele ocorre em pessoas cujo desenvolvimento anormal do cérebro leva a um quadro de incapacidade social, problemas com linguagem, hiperatividade, déficits cognitivos, deficiência intelectual e muitos outros problemas causando uma grande dificuldade na entrada ao mercado de trabalho.
THE EFFECT OF THE COVID-19 PANDEMIC ON THE EDUCATION AND PSYCHOSOCIAL STATUS OF SECONDARY SCHOOL STUDENTS: THE CASE OF ISTANBUL
Authors: ACUNER Deniz , ŞEKERCİ Neşe , PİLAVCI Berra , BİTAR Asena , GÜLER Elif , AYTEKİN Tenzile
Published: May 2022

In the Covid-19 pandemic, which has affected the whole world, education has been suspended in Turkey as of March 16, 2020, and then it has been decided to switch to online (distance) education. The transition to distance education during the pandemic process has affected children's physical, cognitive, psychosocial and all other developmental areas, and various changes have occurred in the content and functioning of the education provided. The purpose of this research is to examine the impact of the Covid-19 pandemic on the education and psychosocial status of secondary school students. This research is a qualitative study. Individual in-depth interview technique was used as the data collection method. In this context, face-to-face and online in-depth interviews lasting 30-60 minutes were conducted with 12 secondary school students studying in Istanbul, in line with the semi-structured questionnaire, with the consent of their families. The data obtained from the interviews were deciphered and evaluated with descriptive analysis and content analysis. MAXQDA computer software was used to analyze the data. Among the participant statements, four main themes and 23 codes were formed: "online education, social life, routines (activities of daily living) and mood". As a result of the analyzes made, it was seen that the educational experiences and psychosocial situations of the students were generally negatively affected by the pandemic process.Students studying at secondary school level in Istanbul participating in the research; They stated that they want to go out of the house and go back to their lives before the pandemic, that they wake up later in the mornings during the distance education process, and that they eat irregularly compared to before the pandemic. In addition, they stated that their study patterns and coursework changed, the efficiency of the lessons decreased, they had problems in the lessons due to technological inadequacies and their stress levels increased due to these problems, they spent more time with their families during the pandemic process and they experienced distraction from their siblings at home. It is recommended to switch to face-to-face training by taking the necessary precautions.
THE RELATIONSHIP OF THE EFFECT OF BRAND TRUST AND SERVICE CONVENIENCE ON CUSTOMER LOYALTY WITH AIBASED MOBILE APPLICATIONS: RESEARCH ON A PRIVATE BANK CUSTOMERS
Authors: ÇELİKKOL Şimal , GÜRSES Özgür
Published: May 2022

The banking sector in the world and in Turkey, especially in the last quarter century, is seen as one of the sectors that has achieved the greatest success in keeping up with the pace of development, expansion and innovations within the scope of communication technologies. In the digital transformation sector reports, the banking sector is seen to be ranking the third of the top three sectors with a ratio of 87.5%. The universe of this research consists of 218 customers who use the proactive Artificial Intelligence-based mobile banking application service of a private bank in Istanbul. In the research; the descriptive research method, which is one of the scientific research types, is applied. The demographic data of the research participants were explained by frequency analysis. Using the explanatory factor analysis and reliability analysis, the validity and reliability analysis of the variables were examined. The direction and the effect of the relationships between variables were examined by performing regression and correlation analysis. Finally, the hypotheses of the research were tested with t-tests. In the findings of the research; it has been seen that, on the formation of customer loyalty of customers using mobile banking services of a private bank, compared to other variables brand trust has less effect on the perception of loyalty of customers using mobile banking services. In addition, it has been concluded that all of these factors have a positive effect on customer loyalty and artificial intelligence-based mobile banking application also has a positive effect on customer loyalty.