bluuebunny/crossref_metadata_2025 huggingface dataset:
Матричное радиовидение на основе гетеродинного приема с применением радиолокации непрерывным излучением
Authors: Королев С.А. , Горюнов А.В. , Паршин В.В.
Published: November 2021

A new approach to the creation of millimeter-wave radio imaging systems is proposed. This approach is based on the use of an array receiver consisting of a densely packed (pixel size - 4 mm) array of planar mixers located in the focal plane of a quasi-optical objective, with application of the frequency-modulated continuous-wave radar technique. It has been demonstrated that the implementation of the heterodyne type of reception makes it possible to increase the distance range of the array radio imaging system up to ~ 100 m while maintaining the angular resolution at the previous level.
Correction: Use of Deep Learning to Predict Acute Kidney Injury After Intravenous Contrast Media Administration: Prediction Model Development Study
Authors: Yun Donghwan , Cho Semin , Kim Yong Chul , Kim Dong Ki , Oh Kook-Hwan , Joo Kwon Wook , Kim Yon Su , Han Seung Seok
Published: November 2021

International Registered Report Identifier (IRRID)

RR2-10.2196/27177
From the Cochrane Library: Interventions for Necrotizing Soft Tissue Infections in Adults (Preprint)
Authors: Shakshouk Hadir , Hua Camille , Adler Brandon L , Ortega-Loayza Alex G
Published: November 2021

UNSTRUCTURED

N/A
A Vast Expansion, Yet a Sorry Infrastructure: A Paradox of the Decolonization of Indonesian Education, c. 1950s
Authors: Suwignyo Agus
Published: November 2021

The multitude of infrastructural problems in the Indonesian educational sector which had to be dealt with during the 1950s was counterpointed by the sector’s massive expansion. The aim of this paper is to explore this paradox in the framework of Indonesian decolonization. The government policy was to greatly expand education at all levels because it believed education was a gateway to “fulfilling independence (mengisi kemerdekaan)”. This paper argues that this expansion was a strategy of decolonization by which the education legacy of the colonial past was to be delegitimized. However, severe budgetary limitations, and a lack of infrastruture and facilities forced the government to continue its dependence on the inherited colonial education facilities and on foreign aid, hence made the strategy of decolonization unrealized in this process of expansion.
Leveraging Understanding of Meat Flavor for Product Success
Authors: Tarté Rodrigo
Published: November 2021

In order to get the most benefit out of the use of spices, seasonings, and flavors, an understanding of meat flavorand the factors that affect it is needed. This article discusses flavor and its sensory perception, the various factors that affectit, and how this understanding can be leveraged to achieve formulation objectives and product success.
Improving business motivation in the time of crisis
Authors: Maulana Noveri , Intan Pesona Anggun
Published: November 2021

The COVID-19 pandemic has had a major impact on businesses. This condition is also experienced by many Minangkabau migrants, Micro and Medium Enterprises (MSMEs) in various cities in Indonesia. To increase the spirit of survival in the midst of a pandemic, the RANTAUNET community provides virtual business training for Minangkabau migrants in formulating business strategies in the midst of a pandemic. A Focus Group Discussion (FGD) was conducted with seven community administrators to prepare a training plan to be conducted. A total of 45 participants attended the virtual training. This virtual training program has provided motivation and knowledge inspiration for MSME actors in rearranging their business strategies.
Comparative Study of New and Traditional Estimators of a New Lifetime Model
Authors: Maurya Sandeep Kumar , Singh Sanjay Kumar , Singh Umesh
Published: November 2021

In this article, we have studied the behavior of estimators of parameter of a new lifetime model, suggested by Maurya et al. (2016), obtained by using methods of moments, maximum likelihood, maximum product spacing, least squares, weighted least squares, percentile, Cramer-von-Mises, Anderson-Darling and Right-tailed Anderson-Darling. Comparison of the estimators has been done on the basis of their mean square errors, biases, absolute and maximum absolute differences between empirical and estimated distribution function and a newly proposed criterion. We have also obtained the asymptomatic confidence interval and associated coverage probability for the parameter.
Inisiasi, pertumbuhan, dan perkembangan kalus embriogenik tanaman stevia (Stevia rebaudiana)
Authors: SINTA Masna Maya , SAPTARI Rizka Tamania , SUMARYONO .
Published: November 2021

The leaves of sweetener plant Stevia rebaudiana contain secondary metabolites of steviol glycosides which are very sweet, with no calorie and zero glycemic index. Propagation of stevia by seeds is ineffective due to its low germination rate and diverse progenies. The tissue culture of stevia can be used to mass propagate rapidly and is commonly conducted by shoot multiplication. Up to now, the technology of somatic embryogenesis (SE) in stevia has not been successful yet. SE is developed to increase the production scale, rejuvenate clonal-propagated plants, and plant genetic transformation. The research objective was to develop protocols for the initiation, proliferation, and development of embryogenic calli of stevia as potential materials for SE. The explants used were young leaves, nodes, and internodes of axenic plantlets of stevia BX clone. The explants were cultured on MS solid media containing different concentrations of auxin and cytokinin for callus initiation. Callus emerged after 2-3 weeks of culture. The calli obtained were proliferated by subculturing several times as material stocks for indirect SE. MS solid media added with 1 µM 3,4-D and 16 mM CaCl2 gave the highest callus multiplication rate (4.7 times in 3 weeks). The selection of embryogenic calli was made continuously to obtain a pure line of embryogenic calli. Three types of calli attained were friable, fast-growing, yellowish calli, shiny nodular calli, and greenish nodular calli. Histological studies revealed that cells of the nodular calli had been differentiated to potentially formed somatic embryos.
Analisis belanja daerah dan faktor-faktor yang mempengaruhinya di Kabupaten Bungo
Authors: Ramadhan Pebrian Rahmad , Umiyati Etik
Published: November 2021

This study aims to: 1) analyze and describe the development of PAD, Balanced Fund, GRDP, population, HDI, and Regional Expenditure of Bungo Regency during 2004-2019. 2) To analyze the effect of PAD, Balanced Fund, GRDP, population, and HDI on Regional Expenditure of Bungo Regency during 2004-2019. The data used in this research is secondary data. The model used in this study is a multiple linear regression model. The results showed that partially the population, balance funds, population, and HDI had a significant effect on Regional Expenditures in Bungo Regency during 2004-2019, while PAD had no considerable effect on Regional Expenditures in Bungo Regency during 2004-2019 with a significant value of P < 0.05. The R2 value in this study was 0.987391. This shows that 98.7391% of regional expenditure in the Bungi Regency is influenced by the population, PAD, balancing funds, GRDP, and IPM. Meanwhile, 1.2609% were influenced by other factors that were not observed in this study.
Keywords : Total population, PAD, Balancing fund, PDRB, IPM,  Regional expenditure
Big Five personality traits and students’ satisfaction with synchronous online academic learning (SOAL)
Authors: Patitsa Christina D. , Sahinidis Alexandros G. , Tsaknis Panagiotis A. , Giannakouli Venetia
Published: November 2021

The purpose of this study is to identify the role personality plays in students’ satisfaction with synchronous online academic learning (SOAL), especially during the COVID-19 pandemic. According to the literature, overall students’ satisfaction with SOAL depends on a number of factors including the quality of SOAL, the quality of the course design, the responsiveness of the instructors, the institutional preparedness, the infrastructure available, and the fairness of the evaluation system. To fully explore the students’ satisfaction with SOAL it is important to examine another important aspect that relates to students’ personalities. For the purpose of this research, an online questionnaire was delivered to undergraduate business students of a public university in Athens during the first spring lockdown period of 2020. The findings of the study indicate that openness and conscientiousness, two of the big five personality traits, present a positive relationship with overall satisfaction with SOAL (Sahinidis & Tsaknis, 2021). They also revealed that students with higher levels of overall satisfaction with SOAL present higher levels of openness, conscientiousness, extraversion, and agreeableness but lower levels of neuroticism. This research study will make a remarkable contribution to the literature regarding the relationship between personality and students’ satisfaction with SOAL
The effect of decision time horizon on short termism: An experimental approach
Authors: Alzoubi Abdallah Bader Mahmoud , Nicholson Gavin , Alzoubi Mohammad Bader Mahmoud
Published: November 2021

Short-termism (i.e., the sub-optimal favouring of short-term performance over long-term performance) is generally explained as an outcome of the agency relationship whereby self-interested managers and/or stock market pressures distort the balance between short and long-term performance. We investigate if short termism (Crilly, 2017; Reilly, Souder, & Ranucci, 2016) is due to cognitive bias (temporal distortion) rather than agency costs. We test these hypotheses with an experimental approach by applying a 3x2 factorial design to manipulate temporal distortion on 60 non-conflicted decision-makers. Results suggest that individuals make inconsistent investment decisions based on differing payout time horizons. Participants faced with simple comparisons between investment opportunities were consistent across different time periods and followed a model of rational decision-making. In contrast, more complex decisions led to intertemporal inconsistency. We provide evidence that: 1) individuals on the whole struggle to deal with incorporating time into business decisions in a consistent way causing us to question the link between short-termism and agency theory; 2) principals likely view investment decisions inconsistently across time and so are a cause of sub-optimal investment decision-making and 3) we need to look beyond studies of moral hazard associated with agency theory and/or myopic market pricing when investigating short-termism.
Is low dose Tranexamic acid less effective than a standard dose at reducing blood loss and inhibiting hyperfibrinolysis in hemorrhagic caesarean section? Multicenter double–blind placebo-controlled dose-ranging (TRACES) trial.
Authors: Ducloy-Bouthors Anne-Sophie , Gilliot Sixtine , Kyheng Maeva , Faraoni David , Turbelin Alexandre , Keita Hawa , Rigouzzo Agnes , Moyanotidou Gabirela , Constant Benjamin , Broisin Francoise , Le-Gouez Agnes , Favier Remi , Peynaud Edith , Ghesquiere louise , Lebuffe Gilles , Duhamel Alain , Allorge Delphine , Susen Sophie , Hennart Benjamin , Jeanpierre Emmanuelle , Odou Pascal
Published: November 2021

Objective: To study the effect of a low (0.5g) or a standard (1g)
tranexamic acid (TA) dose compared to placebo on clinical and biological
endpoints in women experiencing postpartum hemorrhage (PPH) Design:
TRACES trial is a double-blind, randomized, placebo-controlled,
dose-ranging study Setting: 8 women hospitals in France. Population:
Women experiencing PPH > 800 mL during caesarean section.
Method: After informed consent, patients were randomized to receive
either TA 0.5g (n=57), TA 1g (n=58), or a placebo (n=60). Data were
collected at 8 time-points. Main outcome measures: Efficacy: additional
blood loss after study drug, maternal morbidity, safety, biology:
D-dimers, plasmin-antiplasmin complexes (PAP),
simultaneous-generation-thrombin-plasmin-potential. Results: Compared to
1g dose, 0.5g TA was less effective to reduce additional blood loss (300
mL [95% confidence interval (95%CI) 68 to 630] vs 134 mL
[95%CI50 to 419] (p=0.042)). Compared to placebo, 1g TA, but not
0.5g, inhibited hyperfibrinolysis as shown by plasmin generation
potential, % increase in D-dimers from injection to 120 minutes (93%
[95%CI 68 to 118] vs 58% [ 95%CI 32 to 84] (p=0.06) vs 38%
[95%CI 13 to 63] (p=0.003) and % increase in PAP from injection to
30 minutes (56% [95%CI 25 to 87] vs 13% [ 95%CI 18 to 43]
(p=0,051) vs -2% [95%CI -32 to 28] (p=0.009)). Conclusions: In
this study, fibrinolysis inhibition was more sustained after the
administration of 1g TA compared to 0.5g TA or a placebo. Further
pharmacokinetic-pharmacodynamic modelling will be needed to determine
the optimal TA dose to be administered in PPH. NCT 02797119
Assessment of synergistic effect on performing the co-pyrolysis process of coal and waste blends based on thermal analysis
Authors: Brat Zagorka , Jankovic Bojan , Stojiljkovic Dragoslava , Radojevic Milos , Manic Nebojsa
Published: November 2021

The preliminary thermogravimetric studies of co-pyrolyzed low rank coals (lignites Kostolac and Kolubara) with waste materials (spent coffee ground and waste rubber granulate) in a form of blends have been performed. Thermal analysis measurements of blend samples were carried out in a nitrogen, atmosphere at three different heating rates of 10, 15, and 20 K per minute. The coal-waste blends were prepared in the percentage ratios of 90:10, 80:20, and 70:30. This work analyzed the synergy analysis for considered blends shown via descriptive parameters during co-pyrolysis process. According to the performed analysis, the presence of synergistic effect was identified, where strong interactions were also observed. For lignite-spent coffee ground blends, it was found that two factors which affect the synergy effect with coal are concentration of added biomass material and the heating rate. For lignite-tire rubber granulate blends, the blending ratio take on a decisive role for positive consequences of a synergistic effect (ratios below 30% of tire rubber granulate in coals are desirable). Also, in this work the influence of micro-scale condition parameters such as heating rate (as the experimental regulatory factor) was analyzed on the magnitude response of synergism during co-pyrolysis.
Computational analysis on the stability and characteristics of partially premixed butane-air open flames in tubular burner
Authors: Abdul Gani , Muthu Saravanan
Published: November 2021

Partially premixed combustion is one of the developing areas of combustion research that has the advantages of both premixed and diffusion mode of combustion. The present work involves a computational study on the stability and characteristics of partially premixed butane-air flames. The effect of operating parameters like fuel-air ratio, primary aeration, and the presence of co-flow and co-swirl on the stability and flame characteristics has been studied. The simulation results show that the height of the flame decreases with an increase in primary aeration and also in the presence of a co-swirl stream. It has also been found that the stability of flames increases with co-swirl air but deteriorates with the presence of the co-flow air. The flame temperature increases with primary aeration and it has been observed that the peak flame temperature shifts away from the burner mouth for lower primary aeration. It has been observed that the flame stability improves with co-swirl air which is attributed to the re-circulation zone created due to the swirl motion which acts as a heat source. The poor stability in the presence of co-flow air is attributed to flame stretching and aerodynamic quenching of the stretched flamelets. The lift-off velocity and the stable operating range increases with equivalence ratio and also with co-swirl air.
On the approximate numerical solutions of fractional heat equation with heat source and heat loss
Authors: Gundogdu Hami , Gozukizil Omer
Published: November 2021

In this paper, we are interested in obtaining an approximate numerical solution of the fractional heat equation where the fractional derivative is in Caputo sense. We also consider the heat equation with a heat source and heat loss. The fractional Laplace-Adomian decomposition method is applied to gain the approximate numerical solutions of these equations. We give the graphical representations of the solutions depending on the order of fractional derivatives. Maximum absolute error between the exact solutions and approximate solutions depending on the fractional-order are given. For the last thing, we draw a comparison between our results and found ones in the literature.
Assessment of an integrated solar combined cycle system based on conventional and advanced exergetic methods
Authors: Wang Shucheng , Wei Pengcheng , Sajid Sajid , Qi Lei , Qin Mei
Published: November 2021

An integrated solar combined cycle system based on parabolic trough solar collector and combined cycle power plant is proposed. The advanced system is socio-economic significance compared to traditional combined cycle power system. Plainly, the exergetic analyses (exergy destruction and efficiency) via conventional and advanced methods are used for thermodynamic properties of the integrated solar combined cycle system components. In addition, the exergy destruction is divided into endogenous, exogenous, avoidable, and unavoidable. The results show that the combustion chamber has the largest fuel exergy and the highest endogenous exergy destruction rate of 1001.60 MW and 213.87 MW, respectively. Additionally, the combustion chamber has the highest exergy destruction rate of 235.60 MW (60.29%), followed by the parabolic trough solar collector of 54.20 MW (13.87%). For overall system, the endogenous exergy destruction rate of 320.83 MW (82.10%) and exogenous exergy destruction rate of 69.97 MW (17.90%) are resulted via the advanced exergy analysis method. Besides, Several methods to reduce the exergy destruction and improve the components? efficiency are put forward.
The Impact of Racial and Ethnic Health Disparities in Diabetes Management on Clinical Outcomes: A Reinforcement Learning Analysis of Health Inequity Among Youth and Young Adults in the SEARCH for Diabetes in Youth Study
Authors: Kahkoska Anna R. , Pokaprakarn Teeranan , Alexander G. Rumay , Crume Tessa L. , Dabelea Dana , Divers Jasmin , Dolan Lawrence M. , Jensen Elizabeth T. , Lawrence Jean M. , Marcovina Santica , Mottl Amy K. , Pihoker Catherine , Saydah Sharon H. , Kosorok Michael R. , Mayer-Davis Elizabeth J.
Published: November 2021

OBJECTIVE

To estimate difference in population-level glycemic control and the emergence of diabetes complications given a theoretical scenario in which non-White youth and young adults (YYA) with type 1 diabetes (T1D) receive and follow an equivalent distribution of diabetes treatment regimens as non-Hispanic White YYA.

RESEARCH DESIGN AND METHODS

Longitudinal data from YYA diagnosed 2002–2005 in the SEARCH for Diabetes in Youth Study were analyzed. Based on self-reported race/ethnicity, YYA were classified as non-White race or Hispanic ethnicity (non-White subgroup) versus non-Hispanic White race (White subgroup). In the White versus non-White subgroups, the propensity score models estimated treatment regimens, including patterns of insulin modality, self-monitored glucose frequency, and continuous glucose monitoring use. An analysis based on policy evaluation techniques in reinforcement learning estimated the effect of each treatment regimen on mean hemoglobin A1c (HbA1c) and the prevalence of diabetes complications for non-White YYA.

RESULTS

The study included 978 YYA. The sample was 47.5% female and 77.5% non-Hispanic White, with a mean age of 12.8 ± 2.4 years at diagnosis. The estimated population mean of longitudinal average HbA1c over visits was 9.2% and 8.2% for the non-White and White subgroup, respectively (difference of 0.9%). Within the non-White subgroup, mean HbA1c across visits was estimated to decrease by 0.33% (95% CI −0.45, −0.21) if these YYA received the distribution of diabetes treatment regimens of the White subgroup, explaining ∼35% of the estimated difference between the two subgroups. The non-White subgroup was also estimated to have a lower risk of developing diabetic retinopathy, diabetic kidney disease, and peripheral neuropathy with the White youth treatment regimen distribution (P < 0.05), although the low proportion of YYA who developed complications limited statistical power for risk estimations.

CONCLUSIONS

Mathematically modeling an equalized distribution of T1D self-management tools and technology accounted for part of but not all disparities in glycemic control between non-White and White YYA, underscoring the complexity of race and ethnicity-based health inequity.
Diabetic Peripheral Neuropathy and Urological Complications in Type 1 Diabetes: Findings From the Epidemiology of Diabetes Interventions and Complications Study
Authors: Pop-Busui Rodica , Braffett Barbara H. , Wessells Hunter , Herman William H. , Martin Catherine L. , Jacobson Alan M. , Sarma Aruna V.
Published: November 2021

OBJECTIVE

To evaluate associations between diabetic peripheral neuropathy (DPN) and urological complications in men and women with type 1 diabetes (T1D).

RESEARCH DESIGN AND METHODS

Measurements of DPN at Epidemiology of Diabetes Intervention and Complications (EDIC) years 1, 14, and 17 and urological complications at EDIC year 17 were examined in 635 men (mean age 51.6 years, diabetes duration 29.5 years) and 371 women (mean age 50.6 years, diabetes duration 29.8 years) enrolled in the Diabetes Control and Complications Trial (DCCT)/EDIC study. DPN was defined by symptoms, signs, and abnormal electrophysiology or by abnormal Michigan Neuropathy Screening Instrument (MNSI) examination or questionnaire scores.

RESULTS

Erectile dysfunction (ED) in combination with lower urinary tract symptoms (LUTS) was reported in 15% of men and female sexual dysfunction (FSD), LUTS, and urinary incontinence (UI) in 16% of women. Adjusted for age, drinking status, BMI, depression, DCCT/EDIC time-weighted mean HbA1c, microalbuminuria, hypertension, triglycerides, and statin medication use, the odds of reporting ED and LUTS versus no ED or LUTS at EDIC year 17 were 3.52 (95% CI 1.69, 7.31) times greater in men with confirmed DPN at EDIC year 13/14 compared to men without confirmed DPN. Compared to men without DPN, men with DPN based on abnormal MNSI examination or questionnaire scores had significantly higher odds of reporting ED and LUTS versus no ED or LUTS at EDIC year 17. There were no significant differences in DPN between women reporting both FSD and LUTS/UI compared with those without FSD or LUTS/UI at EDIC year 17.

CONCLUSIONS

In long-standing T1D, DPN is associated with the later development of urological complications in men.
The spasticity-related quality of life 6-dimensions instrument in upper-limb spasticity: A first psychometric evaluation
Authors: Turner-Stokes Lynne , Fheodoroff Klemens , Jacinto Jorge , Lambert Jeremy , De La Loge Christine , Calvi-Gries Françoise , Whalen John , Lysandropoulos Andreas , Maisonobe Pascal , Ashford Stephen
Published: November 2021

Objective: Psychometric evaluation of the Spasticity-related Quality of Life 6-Dimensions instrument (SQoL-6D).
Design: A clinimetric evaluation conducted in a multicentre, prospective, longitudinal cohort study at 8 UK sites.
Patients: Adult patients (n=104) undergoing focal treatment of upper-limb spasticity.
Methods: The SQoL-6D was administered in the clinic at enrolment and at 8 weeks, then 1–4 days later at home to assess test-retest reliability.
Results: The SQoL-6D demonstrated adequate construct validity and unidimensionality of the scale, allowing the calculation of a Total score. Cronbach’s alpha (0.74) supported the internal consistency reliability, while the intraclass correlation coefficient supported test-retest reliability (0.82). Correlation coefficients with established instruments supported convergent validity, while significant differences between known-groups (of differing clinical severity) in SQoL-6D Total score confirmed its sensitivity to both cross-sectional and longitudinal differences.
Conclusion: The SQoL-6D is a promising new measure to assess health status for patients with upper-limb spasticity of any aetiology. Further investigation and exploration of the allocation of weights to convert the SQoL-6D to a health-related quality of life utility index, are required.
Rasgos Residuales de Dislexia en Estudiantes Preuniversitarios
Authors: Gómez-Velázquez Fabiola R. , Martínez-Ramos Alicia , Vergara Itzel , Ruiz-Stovel Vanessa D. , Brofman-Epelbaum Jacobo J.
Published: November 2021

Los rasgos de dislexia tienden a persistir hasta la edad adulta, desafortunadamente muchos jóvenes nunca son diagnosticados y continúan lidiando con sus dificultades en etapas preuniversitarias. En el presente estudio se buscó identificar las dificultades en la vida cotidiana que reportan jóvenes preuniversitarios en un cuestionario de dislexia para adultos, para lo cual se compararon las respuestas de 52 estudiantes del último grado de bachillerato, entre 17 y 18 años de edad, 26 jóvenes clasificados como disléxicos por su baja velocidad lectora y pobre conocimiento ortográfico y 26 sin dificultades lectoras, se analizó cada pregunta y su relación con el rendimiento lector. Los resultados mostraron que los jóvenes con dislexia no reportan problemas con la rotación de números, pero sí con el llenado de formas, la ortografía y la lectura en voz alta, en cambio los jóvenes sin dificultades lectoras señalaron con mayor frecuencia tener problemas para discriminar derecha-izquierda, leer un mapa o recordar lo que acaban de leer, aspectos que muchas veces se han relacionado con dislexia. Estos resultados confirman que muchas creencias populares sobre la dislexia no tienen un fundamento científico que las sustente y que los puntajes totales de los cuestionarios de dislexia podría señalar erróneamente a personas sin dificultades lectoras. Proponemos un cuestionario breve enfocado a explorar sólo siete aspectos específicos de la lectura que ayudarían a indentificar rasgos residuales de dislexia en jóvenes, con el fin de brindarles apoyo para continuar sus estudios académicos.
General design criteria for neonatal temperature monitoring sensor using "smart material" conducting polymer development: A review
Authors: Syamimi Nor , Yahud Shuhaida
Published: November 2021

Surface thermistors are being currently used in patient monitoring, including temperature monitoring among neonates. However, these thermistors are reported as being mechanically rigid. This review article aims to provide researchers with a guide to better design a flexible neonatal temperature monitoring sensor. A literature search was conducted to obtain available literature on temperature sensors with specific attention to designing flexible temperature sensors. The achievement of a flexible type thermistor for neonates requires a basic understanding of the thermistor. Also, the conducting polymer material being used and the rationale for their placement. The updated technology in thermistors should be made flexible for the ease of neonates during monitoring. Careful considerations for the design and conduct of flexible temperature sensor research as outlined in this review would help to enhance the quality and comparability of future research studies. Considerations for efficient neonatal temperature monitoring and protection include accuracy, sensor's size, weight, material, and sensor placement. Flexible sensors could be the alternative to conventional bulky and stiff temperature sensors.
An experimental study of the dynamic properties of smart composite magnetorheological materials
Authors: Aguib Salah , Roubah Salah , Hadji Mohamed , Kobzili Lallia , Noureddine Chikh , Djedid Toufik
Published: November 2021

A magnetorheological is a new generation of smart materials in active mechanical vibration and shock control applications. This article is based on a comparative experimental study of the dynamic properties of magnetorheological elastomers (MRE) and magnetorheological fluids (MRF), whose damping and stiffness are controlled simultaneously by applying magnetic field intensity. The dynamic visco-analyser and rheometer were used to test the behaviour of MRE and MRF. The response of both materials depends on the amplitude due to shear strain. The experimental results clearly show the difference between the dynamic properties of MRE and MRF. More specifically, MFRs have high damping with low stiffness; on the other hand, the MRE has average damping with outstanding rigidity. These results help designers achieve more efficient and reliable structures in various engineering fields, such as buildings and mechanical applications.
Investigation of electrical treeing in perspex material
Authors: Abderrazzaq Mohammad
Published: November 2021

Perspex has been known for a long time as a polymeric material, and it has been used for a large number of electrical and non-electrical applications. The present work was carried out to investigates the ageing mechanism of perspex material under a high electric field. The electrical treeing phenomenon was studied using perspex samples with electrodes of a pin-to-plane configuration. The growth of an electrical tree in Perspex was measured and analysed with the aid of an advanced microscope, equipped with a high-resolution camera and connected to a personal computer. Several distinct stages were assigned to characterise the electrical tree development. The area occupied by the electrical tree channels was calculated using equal-area squares. This approach was employed to measure the growth rate of electrical trees under dry and wet conditions. The tree construction, shape and growth speed were studied and analysed to distinguish between treeing phenomenon under wet and dry conditions of fabricated perspex specimens. The absorption of water has increased the tree growth inside the samples, and ions with water have accelerated the breakdown process. The findings of this study are essential to improve the performance of perspex material, which is widely used in a variety of applications for both energy and non-energy purposes.
Pengembangan Bahan Ajar Matematika dengan Berbasis Higher Order Thinking Skills (HOTS) di Kelas VI
Authors: Hidayah Nurul , Rofi'ah Siti
Published: November 2021

Bahasan pokok dari penelitian ini antara lain berisi tentang proses pengembangan yang menghasilkan suatu bahan ajar matematika yang berbasis Higher Order Thinking Skills (HOTS). Dilihat dari judulnya penelitian ini menggunakan metode penelitian pengembangan. Adapun model pengembangan menggunakan Borg and Gall yang memiliki 10 proses antara lain: mencari masalah dan potensi, mengumpulkan data, mendesain produk yang dikembangkan, memvalidasi kepada para ahli, merevisi desain berdasarkan penilaian para ahli, menguji coba pada kelas kecil, merevisi produk berdasarkan hasil uji coba kelas kecil, menguji coba produk secara luas, revisi akhir, dan proses terakhir yaitu desiminasi. Hasil validasi dari para ahli diperoleh presentase sebesar 88,8%, untuk penilaian siswa dari uji coba kelas kecil dan besar sebesar 86%, sedangkan nilai hasil belajar antara sebelum dan sesudah menggunakan handbook terjadi kenaikan 25%. Dari hasil yang diperoleh produk yang dikembangkan menunjukkan valid, menarik, dan efektif digunakan pada proses pembelajaran matematika di kelas VI.
Perbandingan Kemampuan Menulis Permulaan Siswa Kelas 1 SD Negeri 004 Batu Ampar Berdasarkan Siswa Tamatan TK dan Tidak Tamatan TK
Authors: Putri Deantika Prawita , Kurniaman Otang , Hermita Neni
Published: November 2021

this research is intended to describe the starting skiills of students class 1 SD Negeri 004 of Batu Ampar, based on kindergarten students and non-kindergarten students. The subject of this was 20 students class 1 SD Negeri 004 of Batu Ampar stone made up of 10 students who graduated from kindergarten and 10 those students who didn’t graduate from kindergarten. The method employed in the study is a quatitative descriptive method and dating-collection instrument consisting of tests consisting of 20 short written tests, which divide into four types of the vait: thicking letters, thicking words, copying words and copying sentences. The data obtained is further analyzed using a descriptive statistical technique. Studies suggest that there is a differenc betwen the ability to write an undergraduate students. In wich one woul have been a hundred times better writing ability for kindergarten students than avarage grades for kindergarten students 86,1%  in “very good” and students didn’t kindergarten are 74,2%  in category “good”.
Penerapan Metode Question Student Have Untuk Meningkatkan Aktivitas Belajar Peserta Didik
Authors: Nurhaswinda Nurhaswinda
Published: November 2021

The background this research is the low learning activity of students, especially in questioning skills in the learning process. This study aims to determine whether there is an increase in the learning activities of students after applying the question student have method. This research is a Classroom Action Research (CAR). The sample of this research was the fourth grade students of the 2018/2019 academic year with 20 students. This research was completed in 2 cycles consisting of four stages, namely planning, acting, observing, and reflecting. The data collection instruments used were observation and documentation. The results showed that using the question student have method can improve the learning activities of students in mathematics in fourth grade of Elementary School Pahlawan. The activity level of students before the question student have method was applied was 54.28% in the low category. After applying the question student have method in Cycle I, there was an increase of 61.07% in the middle category, and in Cycle II there was an increase of 80.72% in the high category. Based on the results of this study, it can be concluded that the application of the question student have method can improve the learning activities of students in mathematics.
Pengembangan Perangkat Pembelajaran Menulis Narasi Berbasis Media Bagan Pohon di Kelas V Sekolah Dasar
Authors: Jani Nur
Published: November 2021

The difficulty of students in writing narratives is a problem that has been found in the field. Students lack mastery in giving an idea and developing it into a narrative essay. The purpose of this research is to create a learning tool for writing narratives based on tree chart media that is valid, practical, and effective. The type of research used is development research with the ADDIE model. The teacher and the fifth grade students of SD Islam Al-Azhar Simabur are the subjects of this study. Looking at the research data with the validity test, which was obtained from the validation sheet of the learning device. Then to see the practicality data from the observation sheet on the implementation of the lesson plans, along with the teacher and student response questionnaires. Activities and assessments of student learning outcomes are obtained from the effectiveness of learning tools. The results of the validation of learning tools that have been carried out are stated in the very valid category. The learning tools developed are also stated to be very practical, this is supported by the RPP implementation sheet with an average of 90 and the teacher's response 89 then students 91. After that, it can be seen that the results of student activities and student learning outcomes are very satisfying so that it can be stated very effective when applied in learning. In summary, the learning tools developed using the tree chart media in fifth grade elementary school were declared valid, practical and effective.
Pengaruh Penggunaan Metode Jigsaw dan Minat Baca Terhadap Keterampilan Membaca Pemahaman pada Siswa Sekolah Dasar
Authors: Kalsum Ummi
Published: November 2021

This research is motivated by a phenomenon that occurs in the field, namely students have difficulty in reading comprehension. This can be seen from the low scores obtained by students in reading comprehension. This phenomenon makes researchers interested in conducting research. This study aims to obtain information about the effect of using the Jigsaw method and reading interest on reading comprehension skills for elementary school students. This type of research is quantitative research with a quasi-experimental method. Sampling technique The sample in the population is taken using the Simple Random Sampling (SRS) technique. The research data were collected using a reading interest questionnaire and a reading comprehension skill test. The results showed that: (1) the reading comprehension skills of students who were taught using the jigsaw method were higher than the students' reading comprehension skills taught by the conventional method, (2) the reading comprehension skills of students who had high reading interest taught by the jigsaw method were higher. than the reading comprehension skills of students who have high reading interest who are taught by conventional methods, (3) the reading comprehension skills of students who have low reading interest who are taught by the jigsaw method are higher than the reading comprehension skills of students who have low reading interest who are taught by conventional methods , and (4) there is no significant interaction between the jigsawl method and students' reading interest on reading comprehension skills. Based on the research conducted, it can be concluded that reading comprehension skills for elementary school students increase when using the jigsaw method and are associated with reading interest.
Pengaruh Penggunaan Model Membaca Total dan Motivasi Belajar Terhadap Keterampilan Membaca Pemahaman Siswa Sekolah Dasar
Authors: Rafiza Prasnanda Bunga , Miaz Yalvema , Suhaili Neviyarni , Fitriana Fitriana
Published: November 2021

This research is motivated by phenomenon happens on the pitch that students have difficulty in reading comprehension. This is evident from the low values obtained by the students in reading comprehension. This phenomenon makes researchers interested in conducting research. This study aimed to obtain information about the effects of the use of models in total reading and learning motivation towards reading comprehension skills of the sixth grade students of SDN 09 Surau Gadang Kecamatan Nanggalo Padang. This research is a quantitative research methods quasy experiment. The results showed that: (1) reading comprehension skills of students taught by reading the model total is better than reading comprehension skills of students taught by conventional methods, (2) reading comprehension skills of students who have high motivation to learn are taught using models of total reading is better than reading comprehension skills of students who have high motivation to learn are taught using conventional methods, (3) read a deep understanding of writing skills have low learning motivation taught by reading the model of total better than the reading comprehension skills of students who have low learning motivation taught by conventional methods, and (4) there is no significant interaction between the model reading with the total student motivation towards reading comprehension skills. Based on this research can be concluded that there are significant models in total reading and learning motivation towards reading comprehension skills of students in the class VI SDN 09 Surau Gadang Kecamatan Nanggalo Padang.
Management of A Cerebral Cavernoma During Pregnancy: Case Report
Authors: Mesbahi T. , Tahrir Y. , Guettabi K. , Baayoud K. , Ibahiouin K. , Lakhdar A.
Published: November 2021

Intracranial cavernoma is a vascular malformation composed of thin-walled vascular vessels. Blood flow in these lesions is much lower than in AVMs and their hemorrhages are usually small. The presentation is often subacute with seizures or focal neurological deficit, which can be confused in pregnant women with pregnancy toxaemia especially if the malformation is bleeding. We report the case of a 35-year-old patient , 30 weeks pregnant , admitted for delivery who presented with acute intracranial hypertension syndrome with obnubilation of consciousness. Emergency brain CT showed a right fronto-parietal intracranial hematoma. MRI with angiographic sequences show a left parietal hematoma without visible arteriovenous malformation. The patient underwent emergency surgery to evacuate her intracranial hematoma, then the patient was transferred to a gynecological unit for emergency fetal extraction. Histo-pathological analysis of the removed fragments showed an intracranial cavernoma appearance. Urgent surgical evacuation is only necessary if the prognosis is vital.
Pragmatic Transfer in Advanced Saudi EFL Learners’ Refusals
Authors: Abdulaziz Hamad Al-Juraywi Jawaher
Published: November 2021

The present study investigated pragmatic transfer in the refusals of advanced Saudi learners of English as a foreign language (SEFL) in terms of the frequency and content of the emantic formulas, and whether their refusals correspond more to those of Saudi native speakers of Arabic (NSA) or native speakers of English (NSE). A total of 45 female subjects participated in the study and were divided into three groups: advanced SEFL as the target group (n = 15), NSA as a baseline data group (n = 15), and NSE as a baseline data group (n = 15). The study employed a mixed-method data collection approach consisting of a Discourse Completion Test (DCT) and semi-structured interviews. The collected data were analyzed quantitatively and qualitatively using the chi-square test and descriptive statistics. The results of the study revealed that pragmatic transfer was evident in the refusals of the SEFL group in both the frequency and content of semantic formulas. Moreover, the SEFL group’s realization of the speech act of refusal corresponded more to the NSA group than the NSE group. The analysis revealed that the SEFL group’s use of the direct refusal strategies, indirect refusal strategies, and adjuncts to refusals either resembled or approximated the NSA group’s use of the strategies to refuse all of the four stimulus types: requests, invitations, offers, and suggestions. Both the SEFL and NSA groups used the direct refusal strategies in a similar pattern; they used the direct strategies significantly less with interlocutors of a lower and higher social status, and significantly more with interlocutors of an equal social status. Furthermore, the content of the semantic formulas used by the SEFL group corresponded more to the content of the semantic formulas used by the NSA group in terms of the degree of specificity and the choice of the type of specific excuses. The SEFL group significantly approximated the NSA group’s use of both specific and unspecific excuses; they used three categories of specific excuses in a similar frequency: family, health, and personal preferences or needs.
Phylogenetic placement of a recently discovered population of the threatened alpine she-oak skink Cyclodomorphus praealtus (Squamata: Scincidae) in Victoria
Authors: Sumner Joanna , Haines Margaret L. , Lawrence Peter , Lawrence Jenny , Clemann Nick
Published: November 2021

The alpine she-oak skink Cyclodomorphus praealtus is a threatened alpine endemic lizard from the mainland of Australia. The species is previously known from disjunct populations in Kosciuszko National Park in New South Wales and three isolated localities in the Victorian Alps. The New South Wales and Victorian populations represent separate evolutionarily significant units. In 2011, a fourth Victorian population was discovered. We conducted a phylogenetic analysis and determined that the newly discovered population is discrete and may have been separated from other populations since the end of the last glacial maxima. This population requires separate management.
Parasitoids of the uniquely social colletid bee Amphylaeus morosus (Hymenoptera: Colletidae) in Victoria
Authors: Hearn Lucas R. , Stevens Mark I. , Schwarz Michael P. , Parslow Ben A.
Published: November 2021

Understanding how nest parasites contribute to brood mortality rates in host species is an important step towards uncovering the potential implications for host behaviour. This can be especially important for understanding the evolution of social living, where defence against parasites is often posited as a major benefit of cooperative nesting. Only two parasitoid species have previously been reported for the only known social colletid bee, Amphylaeus morosus: the gasteruptiid wasp, Gasteruption primotarsale, and the mutillid, Ephutomorpha tyla. Here we report six additional parasitoid species of A. morosus: the gasteruptiid wasps G. atrinerve, G. globiceps, G. melanopoda and G. cinerescens; the bombyliid fly Anthrax maculatus; and the mutillid wasp Ephutomorpha aff. varipes. The mechanisms of parasitism for these eight parasitoid species are described in combination with how they operate throughout the host brood rearing period and whether benefits of social nesting vary across the season.
Early land plants from the Lower Devonian of central Victoria, Australia, including a new species of Salopella
Authors: McSweeney Fearghus R. , Shimeta Jeff , Buckeridge John St J.S.
Published: November 2021

Early land plants with elongate sporangia held in the palaeobotanical archives of Museums Victoria were examined. The fossil plants are from Yea (?upper Silurian) and near Matlock (Lower Devonian) in central Victoria, and are of interest because they contribute to our understanding of the evolution of early land plants in a region in which research has been limited. Both Salopella australis and Salopella caespitosa were originally described over 30 years ago and this reinvestigation has resulted in the emending of the diagnosis of Salopella australis and the erection of a new morphotaxon Salopella laidae sp. nov. based primarily on differing branching architecture and sporangial morphology. Salopella laidae comes from Yea Formation and possesses regular isotomous branching over at least two orders of branching, terminating in elongate sporangia that are wider than their subtending axes, differing from S. australis, which possesses only one dichotomy emanating from at least two erect parallel parent axes with sporangia that are the same width as their subtending axes. A recently collected specimen of Salopella caespitosa was also examined and adds to our understanding of this taxon, which was previously only known from one specimen. Consideration is given to the possible sources of these early land plants based on other early land plants with a similar grade of organisation.
Aproximações iniciais entre a praxiologia motriz e os jogos condicionados no ensino dos jogos esportivos coletivos
Authors: Bitencourt William Daniel , Ribas João Francisco Magno , Schmitz Antonio Guilherme Filho , Sawitzki Rosalvo Luis
Published: November 2021

Os Jogos Esportivos Coletivos são modalidades que apresentam, em sua lógica interna, peculiaridades que lhes dão um caráter de dinâmica para essas práticas motrizes. Nesse sentido, a aproximação de teorias que sistematizem o processo de ensino-aprendizagem é de suma importância para essas modalidades. Assim, esse estudo tem como objetivo estabelecer relações iniciais entre os principais conceitos da Praxiologia Motriz e dos Jogos Condicionados para o processo de ensino-aprendizagem. Para isso, realizou-se uma pesquisa teórica, apresentando definições conceituais da Praxiologia Motriz e dos Jogos Condicionados, bem como as possíveis aproximações das mesmas dessas propostas. Dessa forma, a partir das discussões teóricas apresentadas, ficou evidente que o processo de ensino-aprendizagem pode ser pautado nessas arestas do conhecimento, pois apresentam expressivos caminhos para o processo de ensino-aprendizagem, possibilidades palpáveis para a prática pedagógica do professor (a), trazendo à tona conhecimentos relevantes para o ensino dos Jogos Esportivos Coletivos.