bluuebunny/crossref_metadata_2025 huggingface dataset:
Cortical thickness and cortical volume measurements of the cingulate gyrus in Sudanese young adult using BrainSuite
Authors: Wegdan Ahmed , Saad Aladin , Ahmed Samy , Karrar Alsharif Mohammed H. , Elfaki Amani
Published: August 2023

Cingulate gyrus is a part of the limbic lobe. Anatomically and functionally, the cingulate gyrus is subdivided into four areas: the anterior cingulate cortex, midcingulate cortex, posterior cingulate gyrus, and the retrosplenial part. The variety of autonomic functions, such as regulating heart rate and blood pressure and having a major role in cognitive function, also has a function in emotional cognition. The present study aims to measure cortical thickness and cortical volume in apparently healthy young adult Sudanese.
In this cross-sectional study, randomly selected individuals (30 males, 30 females) among the Sudanese population, aged between 20-40 years, and who had normal brain magnetic resonance images were included in the study. All study participants underwent magnetic resonance imaging, and measurements of the cingulate gyrus were assessed using BrainSuite software. Analysis was conducted using Statistical Package for the Social Sciences, version 28, and p-values less than 0.05 were considered significant.
For the right cingulate gyrus, the mean cortical thickness and cortical volume were 4.0 mm and 20.9 cm3, respectively. The mean cortical thickness and volume in the left cingulate gyrus were 4.0 mm and 22.3 cm3, respectively. The cortical volume of the left cingulate gyrus was statistically significantly larger than the right (p=0.04). The right and left cingulate gyrus cortical volumes of males were significantly larger than that of females (p=0.001), while the cortical thickness showed an insignificant difference (p=0.3). The cortical volume of the cingulate gyrus was not statistically related to age or body mass index.
The left cingulate gyrus’s total volume is larger than that of the right cingulate gyrus, and there is no significant difference in cortical thickness. Age and body mass index do not affect cortical volume and thickness.
Accounts of adverse neonatal effects in preterm prelabor rupture of membranes: anticipating maternal platelet indices and C-reactive protein as effective biomarkers
Authors: Sai Bhavana D. , Shyamala G. , Sujatha B.
Published: August 2023

Present study aimed at determining maternal platelet indices in preterm prelabor rupture of membranes with adverse neonatal consequences. Comparing maternal C-reactive protein efficacy and platelet indices in predicting outcomes.
Herein, 82 women with preterm prelabor rupture of membranes and 78 women with spontaneous preterm labor were studied. All women undertook complete blood count tests. The group of preterm prelabor rupture of membranes undertook additional C-reactive protein tests. Neonatal outcome data were compiled post-delivery, and results were compared. C-reactive protein efficacy and platelet indices helped in predicting neonatal outcomes in the group of preterm prelabor rupture of membranes using receiver operating characteristic curve analysis.
Women with preterm prelabor rupture of membranes had increased levels of mean platelet volume (8.41 vs. 7.66; p<0.0001), platelet crit (0.223 vs. 0.194; p=0.002), and higher prevalence of early-onset neonatal sepsis (19.5% vs. 2.6%; p<0.001) compared to those with spontaneous preterm labor. In the group of preterm prelabor rupture of membranes, mean platelet volume, platelet crit, and C-reactive protein were significantly associated with respiratory distress syndrome and early-onset neonatal sepsis. The cut-off values mean platelet volume ≥ 8.55fL, platelet crit of ≥0.255%, and C-reactive protein of 5mg/L predicted respiratory distress syndrome with an area under the curve of 0.84, 0.92 and 0.72, the sensitivity of 83%, 91%, and 62%, and specificity of 78.1%, 92.2%, and 68.2%, respectively. The cut-off values of mean platelet volume ≥ 9.05 fL, platelet crit of ≥0.283%, and C-reactive protein of 6mg/L predicted early-onset neonatal sepsis with an area under the curve of 0.86, 0.90 and 0.65, sensitivity of 87.5%, 93%, and 56%, and specificity of 75%, 85%, and 66%, respectively.
Maternal mean platelet volume and platelet crit are useful predictors of neonatal respiratory distress syndrome and early-onset neonatal sepsis in mothers with preterm prelabor rupture of membranes and werebetter predictors of neonatal outcomes than C-reactive protein.
การจัดกลุ่มจังหวัดในประเทศไทยด้วยปัจจัยประชากรศาสตร์และระบาดวิทยา ของโควิด-19
Authors: ชยธวัช วัฒนา
Published: August 2023

โรคติดเชื้อไวรัสโคโรนา 2019 (โควิด – 19) ได้มีการระบาดอย่างต่อเนื่องตั้งแต่ธันวาคม 2562 การจัดกลุ่มพื้นที่เป็นมาตรการสำคัญในการบริหารจัดการโรคติดเชื้อนี้ การศึกษานี้จึงมีวัตถุประสงค์เพื่อทำการวิเคราะห์กลุ่มจังหวัดจากข้อมูลความหนาแน่นของประชากร ขนาดครัวเรือน รายได้ครัวเรือนเฉลี่ยต่อเดือน อัตราการติดเชื้อ และอัตราการเสียชีวิต จากการวิเคราะห์กลุ่มโดยใช้ K-mean clustering พบว่า สามารถจัดกลุ่มจังหวัดได้เป็น 4 กลุ่ม จำแนกตามอัตราการติดเชื้อและอัตราการเสียชีวิต กลุ่ม 1 ปานกลาง จำนวน 23 จังหวัด กลุ่ม 2 และ 4 ต่ำ จำนวน 28 และ 21 จังหวัด ตามลำดับ และกลุ่ม 3 สูง จำนวน 5 จังหวัด เมื่อทำการแจกแจงจังหวัดตามการวิเคราะห์กลุ่มและการจัดจังหวัดตามพื้นที่สถานการณ์ย่อยโรคติดเชื้อไวรัสโคโรนา 2019 (24 มกราคม 2565) ของศูนย์บริหารสถานการณ์ โควิด-19 ที่จัดเป็นพื้นเป็นที่ควบคุม (สีส้ม) 44 จังหวัด พื้นที่เฝ้าระวังสูง (สีเหลือง) 25 จังหวัด และ พื้นที่นำร่องท่องเที่ยว (สีฟ้า) 8 จังหวัด ทำให้สามารถจำแนกระดับของจังหวัดพื้นที่ในแต่ละสีว่ายังมีอัตราการติดเชื้อและอัตราการตายอีกสีละ 3 ระดับ (สูง กลุ่ม 3 กลาง กลุ่ม 1 และ ต่ำ กลุ่ม 2 และ 4) ด้วย ซึ่งสามารถใช้เป็นข้อมูลในการป้องกันตนเองจากการติดเชื้อโควิด-19 ได้
การประดิษฐ์และพัฒนาซีดีไบร์ท ไล่แมลงวัน
Authors: ศรีวะสุทธิ วิลาสินี , เครืออินทร์ ชยาภรณ์ , ฤาชา ภาคภูมิ , ใจสม เสาวภา , บุญญาอารักษ์ นฤมล , มหาวงศ์ คัชรินทร์
Published: August 2023

การประดิษฐ์และพัฒนา “ซีดีไบร์ท ไล่แมลงวัน” มีวัตถุประสงค์ เพื่อพัฒนาซีดีไบร์ท ไล่แมลงวัน และทดสอบความสามารถในการไล่แมลงวัน โดยใช้วัสดุที่มีอยู่แล้วภายในโรงเรียนและท้องถิ่น เพื่อแก้ไข ปัญหาแมลงวันในโรงอาหารของโรงเรียน เพื่อไม่ให้มาตอมอาหาร  และป้องกันโรคที่เกิดจากแมลงวันเป็นพาหะ ผลการประดิษฐ์และพัฒนา ทำให้ได้ ซีดีไบร์ท ไล่แมลงวัน 3 แบบ ได้แก่ แบบที่ 1 ซีดีไบร์ท ไล่แมลงวัน แบบแขวนมีที่เชื่อมต่อไฟฟ้า   แบบที่ 2  แบบแขวนที่พัฒนาต่อยอดจากแบบที่ 1 นำแผงโซล่าเซลล์มาประยุกต์ใช้พลังงานจากธรรมชาติ และแบบที่ 3 แบบตั้งโต๊ะ โดยใช้กระบะถ่านและมอเตอร์  ผลการทดสอบความสามารถในการทำงานของซีดีไบร์ท ไล่แมลงวันทั้ง 3 แบบ จากการสังเกตและสอบถามแม่ค้าและผู้ที่เกี่ยวข้อง พบว่าซีดีไบร์ทไล่แมลงวัน แบบที่ 2 เมื่อใช้แผ่นซีดี จำนวน 4 แผ่น และ แบบที่ 3  เมื่อใช้แผ่นซีดี จำนวน 2 แผ่น แขวน  จะทำให้มอเตอร์ แกว่งเร็วพอดี แผ่นซีดีโดนมือแล้วไม่รู้สึกเจ็บ  แผ่นซีดีสูงพอดี สามารถไล่แมลงวันได้ดี ไม่มีแมลงวันมาตอม  ผู้ใช้มีความพึงพอใจทั้ง 3 แบบ โดยมีความพึงพอใจต่อแบบที่ 2 และแบบที่ 3 มากที่สุด เพราะแบบที่ 2  สามารถถอดประกอบได้  มีแบตเตอรี่รถจักรยานยนต์ หม้อแปลงไฟ หรือ inverter ชาร์จไฟกับชุดอุปกรณ์โซล่าเซลล์ที่มีอยู่แล้วในโรงเรียน ช่วยประหยัดไฟฟ้าโรงเรียน  และ แบบที่ 3 มีขนาดกระทัดรัด มีกระบะถ่านต่อตรงกับมอเตอร์ DC  ขนาด 12 โวลต์ ก้านโลหะแขวนแผ่นซีดี  ทั้ง แบบที่ 2 และ แบบที่ 3 เคลื่อนย้ายสะดวก ใช้ได้ทุกที่ รวมทั้งสถานที่ที่ไม่มีไฟฟ้าเชื่อมต่อ ดังนั้นซีดีไบร์ท ไล่แมลงวันที่พัฒนาขึ้นนี้สามารถไล่แมลงวันได้ช่วยกำจัดความรำคาญและป้องกันโรคที่เกิดจากแมลงวันเป็นพาหะได้
การพัฒนาลิปบาล์มสมุนไพรไทยด้วยวัตถุดิบและสีธรรมชาติ
Authors: บุญก่อน พรอนันต์ , ทุยเวียง ณัฐพร , สุเนตรปิยฉัตร สุพัตรา
Published: August 2023

การวิจัยครั้งนี้มีวัตถุประสงค์เพื่อพัฒนาสูตรลิปบาล์มสมุนไพรไทยโดยใช้วัตถุดิบจากธรรมชาติ             โดยแบ่งออกเป็นสองการทดลอง ประกอบด้วยการทดลองที่ 1 ศึกษาชนิดของน้ำมันที่เหมาะสมต่อการสกัดกระชาย ขิง ตะไคร้ โดยใช้น้ำมันปาล์ม น้ำมันถั่วเหลือง และน้ำมันละหุ่ง พบว่า น้ำมันปาล์มมีความเหมาะสมกว่าน้ำมันถั่วเหลืองและน้ำมันละหุ่ง เนื่องจากได้ปริมาตรของน้ำมันสกัดที่สูงกว่าน้ำมันชนิดอื่น และอุณหภูมิของสารสกัดไม่สูงมาก ไม่มีกลิ่นฉุน ส่วนการทดลองที่ 2 ศึกษาการสกัดสีจากพืช 10 ชนิด ด้วยน้ำมันมะพร้าว ได้แก่ ฟักทอง ขมิ้น แครอท ดอกทองอุไร มันม่วง กะหล่ำม่วง ใบเตย ข้าวไรซ์เบอร์รี่ ข้าวก่ำ และเปลือกแก้วมังกร เพื่อนำไปปรับสีของลิปบาล์มสมุนไพร พบว่า พืช 3 ชนิดที่มีความเหมาะสมต่อการนำไปพัฒนาสูตร           ลิปบาล์มสมุนไพร ได้แก่ ฟักทอง ทองอุไร และ ใบเตย เนื่องจากให้ลิปบาล์มที่มีสีสวย และสกัดสีได้ง่ายกว่าพืชชนิดอื่น เมื่อนำผลิตภัณฑ์ทั้งสามสูตรที่พัฒนาได้นั้นมาทดสอบความพึงพอใจของผู้บริโภคต่อผลิตภัณฑ์  โดยเน้นกลุ่มนักศึกษาและพนักงานทั่วไปจำนวน 20 คน ทั้งเพศชายและหญิง ช่วงอายุ 18-60 ปี  พบว่าภายหลังการทดสอบใช้เป็นเวลา 1 เดือน สูตรที่ประกอบด้วยน้ำมันสมุนไพรกระชาย ขิง ตะไคร้ ที่ผสมสีที่สกัดจากฟักทองเป็นที่ยอมรับของผู้บริโภคมากที่สุด มีคะแนนอยู่ในระดับที่ชอบมากถึงชอบมากที่สุด
ผลลัพธ์ของการส่งเสริมการใช้ยาอย่างสมเหตุผลในโรงพยาบาลและชุมชนจังหวัดสุโขทัย
Authors: วรปาณิ ธีรยา , วรปาณิ ปองพล
Published: August 2023

ยาเป็นหนึ่งในปัจจัยสี่ที่มีความจำเป็นในการดำรงชีวิตเช่นเดียวกับอาหาร ที่อยู่อาศัย และเครื่องนุ่งห่ม ดังนั้นการใช้ยาอย่างสมเหตุผลจึงมีความสำคัญอย่างมาก โดยการส่งเสริมการใช้ยาอย่างสมเหตุผลจะครอบคลุมทั้งในโรงพยาบาลของรัฐและเอกชน สถานพยาบาลและร้านขายยา หน่วยบริการปฐมภูมิ และชุมชน งานวิจัยนี้เป็นการวิจัยเชิงพรรณนามีวัตถุประสงค์เพื่อศึกษาผลลัพธ์ของการส่งเสริมการใช้ยาอย่างสมเหตุผล ในโรงพยาบาลและชุมชนจังหวัดสุโขทัย  โดยมีการประชุมระดมสมองและแลกเปลี่ยนเรียนรู้ ทั้งหมด 3 ครั้ง เพื่อชี้แจงนโยบายและตัวชี้วัด สร้างทีมและเครือข่ายระดับจังหวัด อำเภอ และตำบล กำหนดทีมพี่เลี้ยงและ             ผู้ประสานงานระดับจังหวัด กำหนดพื้นที่ต้นแบบให้เรียนรู้ จัดทำฐานข้อมูลโดยใช้เทคโนโลยีและสามารถ  ค้นคืนข้อมูลได้ จัดเวทีแลกเปลี่ยนองค์ความรู้ ติดตามผลการดำเนินงาน วิเคราะห์ปัญหาและค้นหา              แนวทางแก้ไขปัญหาร่วมกัน และวางแผนการดำเนินงานอย่างต่อเนื่อง วิเคราะห์ข้อมูลเป็นค่าความถี่ ร้อยละ     ผลการศึกษา พบว่า โรงพยาบาลส่วนใหญ่ผ่านเกณฑ์ตัวชี้วัดการส่งเสริมการใช้ยาอย่างสมเหตุผลในโรงพยาบาล รวมถึงโรงพยาบาลส่งเสริมสุขภาพตำบลทุกแห่งในจังหวัดสุโขทัยมีการอัตราการใช้ยาปฏิชีวนะในโรคติดเชื้อระบบทางเดินหายใจช่วงบนและหลอดลมอักเสบเฉียบพลันและโรคติดเชื้อในโรคอุจจาระร่วงเฉียบพลันผ่านเกณฑ์ที่กำหนด นอกจากนี้มีการส่งเสริมการใช้ยาอย่างสมเหตุผลในชุมชนร่วมกับภาคีเครือข่ายและชุมชน โดยมีการลงพื้นที่ประเมินมาตรฐานร้านค้า ร้อยละ 45.26 พบการจำหน่ายผลิตภัณฑ์สุขภาพผิดกฎหมาย ร้อยละ 5.66 ผลิตภัณฑ์สุขภาพที่ผิดกฎหมายที่จำหน่ายในร้านค้าส่วนใหญ่เป็นผลิตภัณฑ์ยา เช่น ยาอันตราย (ร้อยละ 82.14) ยาแบ่งบรรจุ (ร้อยละ 10.27) ยาชุด (ร้อยละ 4.91) ยาไม่มีทะเบียน (ร้อยละ 1.79) และยาหมดอายุ (ร้อยละ 0.89) ดังนั้นการให้ความรู้แก่ประชาชนและการรณรงค์ให้ร้านค้าจำหน่ายผลิตภัณฑ์สุขภาพที่ถูกกฎหมาย ตลอดจนการร่วมมือกันกับทุกภาคส่วนในการลงพื้นที่ควบคุมกำกับและบังคับใช้กฎหมายกับร้านค้าที่จำหน่ายผลิตภัณฑ์สุขภาพผิดกฎหมายอย่างต่อเนื่อง จะช่วยให้ร้านค้าจำหน่ายผลิตภัณฑ์สุขภาพผิดกฎหมายลดลง ประชาชนได้รับความปลอดภัยอย่างยั่งยืน
การพัฒนาบทเรียนอิเล็กทรอนิกส์ เรื่อง แนวคิดเชิงคำนวณ
Authors: ปันชัย ศักรินทร์ , บัวหลวง อาชานนท์ , กันขัติ์ ศิริกรณ์
Published: August 2023

งานวิจัยนี้มีวัตถุประสงค์ 1) เพื่อพัฒนาบทเรียนอิเล็กทรอนิกส์ วิชาวิทยาการคำนวณ เรื่อง แนวคิดเชิงคำนวณ มีองค์ประกอบ ดังนี้ หน้าสำหรับสมัครสมาชิก หน้าบทเรียน หน้าแบบทดสอบ ฐานข้อมูล การจัดอันดับประวัติการทำแบบทดสอบ ข้อเสนอแนะ 2) เพื่อประเมินประสิทธิภาพของบทเรียนอิเล็กทรอนิกส์เรื่อง แนวคิดเชิงคำนวณ โดยใช้เกณฑ์ E1/E2  ผลการประเมินในภาพรวมอยู่ในระดับคุณภาพดีมาก 3) เพื่อศึกษาความพึงพอใจของนักเรียนที่มีต่อการเรียนโดยใช้บทเรียนอิเล็กทรอนิกส์เรื่อง แนวคิดเชิงคำนวณ ผลการประเมินในภาพรวมอยู่ในระดับพึงพอใจมาก กลุ่มเป้าหมายในการวิจัยครั้งนี้คือ นักเรียนชั้นมัธยมศึกษาปีที่ 4/1 โรงเรียนศึกษาสงเคราะห์เชียงใหม่ จำนวน 38 คน เครื่องมือที่ใช้ในการวิจัยประกอบด้วย 1) บทเรียนอิเล็กทรอนิกส์ วิชาวิทยาการคำนวณ เรื่อง แนวคิดเชิงคำนวณ สามารถนำไปใช้ได้ 2) แบบประเมินประสิทธิภาพโดยใช้เกณฑ์ E1/E2 3) แบบประเมินความพึงพอใจของนักเรียนที่มีต่อบทเรียนอิเล็กทรอนิกส์ เรื่อง แนวคิดเชิงคำนวณ ซึ่งมีผลการวิจัยสรุปดังนี้ 1) บทเรียนอิเล็กทรอนิกส์ที่ผู้วิจัยได้พัฒนาขึ้นมามีประสิทธิภาพ 81.37/85.44 เมื่อนำคะแนนก่อนเรียนและหลังเรียนมาเปรียบเทียบความแตกต่างของค่าเฉลี่ยด้วยการทดสอบ t-test พบว่าผลสัมฤทธิ์ของนักเรียนที่เรียนบทเรียนอิเล็กทรอนิกส์สูงขึ้นอย่างมีนัยสำคัญทางสถิติที่ระดับ .05 2) นักเรียนมึความพึงพอใจต่อการเรียนด้วยบทเรียนอิเล็กทรอนิกส์ในภาพรวมอยู่ในระดับมาก ด้วยค่าเฉลี่ย 4.34
CURRICULUM DESIGN: PURPOSE, PROCESS & AGENCY
Authors: Golding Ty , Place Catherine
Published: August 2023

Educators in Wales currently find themselves in a moment. This moment is defined by far-reaching reform. Globally, education reform is nothing new, “national curricula are constantly changing” (Sinnema, 2015, p. 965) and historically, Wales is no different.
A CULTURE OF WELLBEING: WHY WE MUST PUT POSITIVE MENTAL HEALTH AT THE HEART OF OUR SCHOOLS
Authors: Speight Andrew
Published: August 2023

For young people, a key priority when rethinking education is considering how education affects our mental health. It will come as no surprise that young people are facing a mental health epidemic, and the education system has become a driving factor in this. Recent policies have fuelled toxic cultures in our schools, which glorify burnout and stigmatise those who rest as scroungers, whilst long-standing, paradigmatic problems have persisted.Too many young people try to learn in these fear-driven cultures each day – and this was my reality at school. After growing significantly aggrieved, I took action to ensure my school implemented what is called a ‘culture of well-being’ – one wherein rest is held in equal regard to work. One wherein the positive well-being of all is actively promoted – for it is recognised that positive well-being is an essential prerequisite to learning.The culture of well-being has created positive change to the realities experienced by young people on the ground – as well as for the whole-school community. In this article, I will introduce the culture of well-being, explain how to implement it in practice, and amplify the plea of young people for education to work with, not against, their mental health.
Compreensão leitora e compreensão de linguagem técnica na área da Engenharia: um estudo psicolinguístico
Authors: Schlichting Thais de Souza , Souza Ana Cláudia de
Published: August 2023

Este trabalho tem por objetivo discutir e compreender como se relacionam a compreensão em leitura e a compreensão de linguagem técnica no campo da Engenharia. Para tanto, são mobilizados dados coletados por meio de protocolos verbais de leitura, que intentam evidenciar informações acerca do processo de compreensão de textos por parte do participante, que verbaliza seus pensamentos durante uma tarefa de leitura. Os participantes da pesquisa são acadêmicos/as do 10º semestre do curso de Engenharia Elétrica de uma universidade do interior de Santa Catarina. Os dados são analisados quantitativamente, sob o viés teórico da Psicolinguística, considerando-se as teorias acerca dos processos integrantes da compreensão em leitura. A análise indica que os participantes da pesquisa, ao se defrontarem com terminologia especializada e desconhecida em textos da área, desenvolvem estratégias de leitura voltadas a aspectos mais abrangentes do texto. Quando, por sua vez, o texto de forma mais ampla oferece desafios aos leitores, estes recorrem a termos técnicos nos quais se apoiam para compreender o que foi lido.  A compreensão em leitura e a compreensão de linguagem técnica estão, assim, em uma relação de interação e retroalimentação no contexto pesquisado.
“O Meu Pé de Laranja lima”: semiótica e figuratividade
Authors: Viana Fernanda , Silva Sueli Maria Ramos da
Published: August 2023

Levando em consideração que o texto literário pode ser um campo fértil para pensamentos filosófico-linguísticos, condicionamos diversos tratamentos dados a ele, clarificando a criatividade poética e, sobretudo, a construção de sentido. Dessa forma, este artigo, de forma geral, visa a apresentar uma análise da semiótica discursiva em uma articulação com o texto literário. Especificamente, pretendemos evidenciar o sentido, destacando as figuras que convocam a temática da fantasia na obra “O Meu Pé de Laranja Lima” (1968), de José Mauro de Vasconcelos. A justificativa para a análise baseia-se na aspectualização da fantasia, como a temática que sensibiliza os leitores, principalmente, os que temos contato na formação de leitores durante o exercício docente. Nessa perspectiva, a construção da investigação constitui-se por intermédio de trechos da obra que mostram a natureza das isotopias fantasiosas capazes de caracterizar os valores inseridos no discurso. Isso ocorre por meio dos percursos narrativos em que se consolida o fio temático, legitimando o aspecto fático e um modo de verdade (DISCINI, 2004). Dessa maneira, levando em consideração o conteúdo, com alicerce nas estruturas discursivas – pretende-se expor a dimensão figurativa do enunciado em análise (BERTRAND, 2003). Assim sendo, procura-se contribuir com os estudos acerca do texto literário e com a própria concepção semiótica da figuratividade em particular.
Um novo método baseado em detector de dois estágios para segmentação de instância de lesões retinianas usando o modelo Mask R-CNN e a biblioteca Detectron2
Authors: Dias Marcelo , Santos Carlos , Aguiar Marilton , Welfer Daniel , Pereira Alejandro , Ribeiro Marcelo
Published: August 2023

O desenvolvimento de métodos computacionais para realizar a segmentação de instância de lesões retinianas como microaneurismas, hemorragias, exsudatos algodonosos e exsudatos duros desempenha um papel fundamental no diagnóstico precoce da Retinopatia Diabética. Este artigo propõe um método baseado no modelo Mask R-CNN para realizar a segmentação de instância de lesões associadas à Retinopatia Diabética. A arquitetura de rede neural profunda foi treinada, ajustada e testada usando diferentes conjuntos de dados de retinopatia diabética disponíveis publicamente. Além disso, a rede neural foi implementada usando as bibliotecas Detectron2 e OpenCV. O método proposto alcançou no DDR (Dataset for Diabetic Retinopathy) e com otimizador SGD (Stochastic Gradient Descent) o mAP (mean Averegare Precision) de 0,2664 para o limite de Interseção sobre União de 0,5 na etapa de validação.
An Intelligent Chess Piece Detection Tool
Authors: Menezes Richardson , Maia Helton
Published: August 2023

Chess is one of the most researched domains in the annals of artificial intelligence. The main objective of this research is to develop a platform that can determine piece positioning during chess games. Digital image processing methods and real-time object detection (YOLO version 4) algorithms were used during computational development. The problem entails analyzing images captured during a chess game and determining the location of each square on the board, as well as the position of each piece in play. This procedure is repeated at each game turn, enabling the developed system to save and watch all piece moves during a game. The obtained results demonstrate the system’s reliability and feasibility.
Utilizando a Arquitetura UNet++ na Estimativa de Profundidade Monocular
Authors: Guzzo Luiz Antonio Roque , Gazolli Kelly Assis de Souza
Published: August 2023

Com o surgimento das redes convolucionais, muitas abordagens foram propostas visando melhorar os resultados na estimativa de profundidade, mas desconsiderando os custos computacionais. Neste trabalho, apresentamos uma abordagem que utiliza a arquitetura UNet++, empregando uma rede MobileNetV2 como codificador, gerando uma estrutura mais leve, com um número menor de parâmetros. Os experimentos realizados na base NYU Depth V2 mostraram que é possível alcançar melhores resultados quando comparado a trabalhos anteriores, mantendo, no entanto, uma estrutura mais simples.
Abordagem VISO: uma Contribuição à Socialização entre Objetos da Internet das Coisas
Authors: Camargo Leandro , Pernas Ana Marilza , Yamin Adenauer
Published: August 2023

A crescente conectividade dos objetos na IoT permite que eles interajam, compartilhando informações e colaborando de diversas maneiras para realizar tarefas coletivas. No entanto, isso envolve vários desafios de pesquisa ainda abertos. Neste contexto, este artigo apresenta a concepção da abordagem Virtual Interactions between Social Objects (VISO). Esta abordagem trata de aspectos funcionais que uma arquitetura voltada à Social IoT deve prover, especialmente a recomendação autônoma de amizades. A VISO explora o conceito de virtualização de objetos para uma atuação autônoma no ambiente. Resultados preliminares indicam que o agrupamento de objetos em comunidades potencializa as recomendações de serviços ou amizades, de maneira socialmente consciente e personalizada.
Estudo de Estratégia de Aprendizado Auto-supervisionado para Aprimoramento da Consistência Temporal em Modelo de Segmentação Semântica Baseado em Deep Learning
Authors: Barbosa Felipe M. , Osório Fernando S.
Published: August 2023

Segmentação semântica por meio de Deep Learning tem extrema importância na percepção visual para robôs móveis autônomos. Contudo, grande parte da pesquisa atual se baseia percepção quadro-a-quadro. Tal abordagem, além de negligenciar as possibilidades oferecidas pelo uso de dados temporais, resulta em modelos instáveis. Diante disso, e do alto custo do processo de rotulação, novas alternativas de aprendizado exploram a ampla disponibilidade de dados temporais não-rotulados. O presente trabalho estuda a aplicação de supervisão auxiliar auto-supervisionada para promoção da estabilidade temporal em modelos de segmentação. Os resultados demonstram que tal estratégia promove a precisão e estabilidade, mesmo utilizando dados de bases distintas.
Integrando BPMN e AIML para construção de fluxos de diálogo para Chatbots
Authors: Neo Giseldo S. , Barros Evandro C. , Neo Alana V. B. S. , Moura J. Antão B. , Correia Arthur C. , Rodrigues Wanderson R. M.
Published: August 2023

Entre as linguagens para a especificação da base de conhecimento de chatbots existe uma que se destaca pela sua simplicidade o Artificial Inteligence Markup Language (AIML). Porém, desenhar fluxos de diálogo com AIML exige o conhecimento de suas tags XML, além disso, quanto mais complexo o fluxo maior o esforço de manutenção dessa estrutura. Por outro lado, a especificação Business Process Model and Notation (BPMN) prevê uma série de símbolos e padrões de fácil interpretação visual. Para minimizar a complexidade na construção e manutenção dos fluxos em XML do AIML propomos um conversor do BPMN para o AIML (BPMN2AIML). Para Validar a proposta realizamos um estudo de caso em que usuários mapearam fluxos de diálogo e avaliaram a sua usabilidade, também criamos dois chatbots e avaliamos a interação de um deles. Os resultados experimentais demonstram que desenhar fluxos visuais para representar a base de conhecimento dos chatbots AIML com BPMN é possível e aparentemente mais intuitivo do que trabalhar direto com o XML.
Wenn ein Rechtsanspruch nicht reicht
Authors: WILKE FELIX , SIELAFF MAREIKE
Published: August 2023

Trotz einer breiten Zustimmung zum im Grundsicherungssystem verankerten sozialstaatlichen Auftrag werden Leistungen wie Arbeitslos II oder Grundsicherung im Alter häufig nicht beantragt. Eine wichtige Ursache dafür sind legitimatorische Vorbehalte gegenüber der Inanspruchnahme: Ein Rechtsanspruch allein ist für viele nicht ausreichend ; zusätzlich muss eine gesellschaftlich anerkannte Hilfebedürftigkeit vorliegen. Mit der Stärkung des Prinzips der Eigenverantwortung im aktivierenden Sozialstaat wurden entsprechende Vorbehalte systematisch verstärkt. Der Beitrag untersucht anhand des SOEP-Innovationssamples der Welle 2020 / 2021, wie sich Vorbehalte gegenüber der Inanspruchnahme von Grundsicherungsleistungen empirisch äußern. Mittels multivariater Analyse wird aufgezeigt, dass eine Delegitimierung der Inanspruchnahme mit individuellen Interessenlagen, Normen der Eigenverantwortung und der allgemeinen politischen Einstellung korrespondiert.
Governing Through Courts? Law and the Political-Economy of Climate Change Litigation in Indonesia
Authors: Wardana Agung
Published: August 2023

Despite the global trend, climate change litigation in Southeast Asia has remained underexplored and has been given less attention within scholarly discourse. This article aims to contribute to the debate in the region by taking a critical stand in order to counter-balance the predominantly optimistic view of the efficacy of climate change litigation and to better determine the delimiting factors to climate litigation in addressing the climate crisis. In doing so, it examines three main cases representing climate litigation in Indonesia and argues that, in a country where the government pursues economic development based on a carbon-intensive economic growth model, climate litigation appears to be more challenging as it may pose a challenge to the existing political and economic model – the model that has caused the climate crisis in the first place. In fact, the courts, which are regarded as the last line of environmental defence, have also been influenced by this structural condition and has arguably taken up the role of guardian of this economic model.
Nachhaltige Vision: Die erste klassisch-ökologische Utopie Ecotopia (1975) von Ernest Callenbach
Authors: Schölderle Thomas
Published: August 2023

Die globalen Umweltprobleme waren seit Ende der 1960er-Jahre unübersehbar. Im Jahr 1975 veröffentlichte Ernest Callenbach mit Ecotopia die erste große ökologische Utopie, die den Kri⁠senszenarien eine dezidiert positive Alternative gegenüberstellte. Callenbachs Utopie avancierte in kurzer Zeit zu einem Kultbuch der Ökologiebewegung. Im Mittelpunkt seiner literarischen Fiktion steht das Konzept einer nachhaltigen Kreislaufwirtschaft mit vollständig regenerativer Energieversorgung, das aus heutiger Sicht durchaus als visionär gelten kann. Obwohl Einfluss und Stärke des Entwurfs nicht in seiner literarischen Qualität liegen, hält Callenbachs Utopie auch bemerkenswerte gattungsgeschichtliche Innovationen parat, die sowohl das Transformationsverhältnis von Utopie und sozialer Wirklichkeit als auch die Transformation des Utopiegenres selbst betreffen.
Finding Molecular Inhibitors of the Inflammatory Pathway in the Large Intestine Along with Molecular Dynamics with Emphasis on the Use of TCM Database
Authors: Sargazi Ali , Fakheri Baratali , Bahari Abbas Ali , Mahdinezhad Nafiseh
Published: August 2023

Background: Due to the fact that colon inflammation is one of the most common diseases in the country, the interest in using herbal medicines to cure intestinal inflammation is increasing day by day. Objectives: In the present research, we aimed to identify the target molecules in the immune system by analyzing the transcriptome of these diseases and using the virtual screening technique to search for plant compounds that have antagonistic capabilities for these receptors. Also, by using this in vitro culture, check and confirm the anti-inflammatory properties of these compounds. Methods: The population study includes 200 human transcriptome runs, about 60 thousand compounds related to medicinal plants, and in vitro experiments with at least three experimental replicates and three technical replicates. In this study, the anticancer and immunomodulatory effects of aqueous extracts of rosemary and nettle medicinal plants were investigated as a promising source of cancer treatment against the AGS cell line derived from gastric cancer (AGS-Cell-DGC). IC50 of the extracts was determined by MTT assay. Flow cytometry and real-time PCR (RT-PCR) were measured. Results: The MTT test on the survival percentage of AGS cell line (90%) derived from gastric cancer showed that the highest amount of live cells was observed in control, and the lowest amount was observed in the simultaneous combination of rosemary and nettle extract and then nettle (100%). The highest expression of interleukin 1-beta (IL-1β) gene occurred in the control, and the lowest expression occurred in the simultaneous combination of nettle and rosemary extracts. The highest expression of tumor necrosis factor-alpha (TNF-α) gene occurred in the control, and the lowest expression occurred in the simultaneous combination of nettle and rosemary extracts. Conclusions: The results showed that the highest amount of live cells was observed in the control, and the lowest amount was observed in the simultaneous combination of rosemary and nettle extract and then nettle (100%) alone. However, further clinical trials are needed to confirm the results of this research.
A Practical Algorithm for the Management of Superficial Folliculitis of the Scalp: 10 Years of Clinical and Dermoscopy Experience
Authors: Starace Michela , Yamagata João Paulo , Cortez de Almeida Rita Fernanda , Frattini Simone , Bruni Francesca , Alessandrini Aurora , Iorizzo Matilde , Fernandes Melo Daniel , Neri Iria , Piraccini Bianca Maria
Published: August 2023

Introduction: Superficial folliculitis of the scalp (SFS) is a common complaint in clinical practice, and initial presentation may be difficult to differentiate as they may appear very similar to each other.
Objectives: The aim of this thesis is to describe the pathologies that occur clinically as folliculitis of the scalp, identify their causes and characteristics and create a standardized classification.
Methods: This is a retrospective clinical, dermoscopic and histopathological study over 10 years of dermatologic consultations. Only individuals with a confirmed diagnosis of SFS (updated diagnostic criteria or biopsy) were included.
Results: In this review, we describe the various clinical features of different causes of SFS in ninety-nine cases and divided into infectious due to fungus, bacteria, or virus and inflammatory conditions such as rosacea, acneiform eruption and Ofuji syndrome.
Conclusions: The clinician must differentiate SFS from other underlying scarring disorders to prevent poorer outcomes. We created an algorithm to help the clinician reach a proper diagnosis.
Subjective and Objective Measurements of the Facial Effects of Microdoses of Botulinum Toxin
Authors: Hexsel Doris , Valente-Bezerra Indira , Mosena Gabriela , Mourao Maria Antonia Oakim , Fabris Vitor Costa
Published: August 2023

Introduction: Studies have suggested that botulinum toxin A may improve skin quality, and application protocols using hyper-diluted doses of botulinum toxin (microdosing) have been studied as a way to achieve therapeutic goals without fully paralyzing the targeted muscles.
Objectives: To evaluate the effects of a combined protocol utilizing both the standard dosing and the microdosing of AbobotulinumtoxinA for the improvement of skin quality, measured by objective and subjective measurements.
Methods: Thirty patients were treated with botulinum toxin using both the standard technique and the microdosing technique. Objective (Sebumeter®, Mexameter® and digital dermoscopy pictures) and subjective (Global Aesthetic Improvement Scale and a clinical scale for evaluating the quality of facial skin) measurements of the effects in the treated areas were taken to assess the efficacy of the treatment.
Results: Digital dermoscopy showed a marked reduction of erythema and telangiectasias. Erythema and telangiectasias improved both on objective and subjective measurements. Skin oleosity, static rhytids, papules and pustules and enlarged pores improved on subjective measurements. Patient satisfaction was high (93%) despite the high rate of adverse events (56%).
Conclusions: The combined application of standard doses and microdoses of AbobotulinumtoxinA is effective in improving the overall quality of facial skin. The effects on erythema and telangiectasias suggest that it is an effective treatment option for patients with erythematotelangiectatic rosacea. When applying microdoses of botulinum toxin in the lower and mid-face, the doses and pattern of injection should be customized for each patient to reduce the occurrence of adverse events.
Clinical Challenges in Primary Erythromelalgia: A Real-Life Experience from a Single Center and a Diagnostic-Therapeutic Flow-Chart Proposal
Authors: Michelerio Andrea , Tomasini Carlo , Arbustini Eloisa , Vassallo Camilla
Published: August 2023

Introduction: Primary erythromelalgia (EM) is a rare clinical syndrome characterized by recurrent erythema, burning pain and warmth of the extremities. The symptoms greatly compromise the patients' quality of life leading to severe disability. SCN9A mutations can be the cause of the disease. Dermatologists are often the specialists these patients turn to for assistance.
Objectives: To describe the demographic and clinical characteristics of patients with primary EM, to assess the presence and mutation types in the SCN9A gene, to evaluate the effectiveness of several therapeutic approaches, and to propose a diagnostic algorithm with therapeutic implications.
Methods: A monocentric retrospective study using the database of patients with a discharge diagnosis of primary EM of our Center. Demographic, clinical, instrumental and laboratory data of patients were reviewed.
Results: Eleven female patients (age range 16 to 57) were selected. All patients were affected in both the lower and upper extremities. Follow-up ranged from 2 to 9 years. Four patients had four different heterozygous variants of the SCN9A gene. Two patients, although genetically negative, had a suggestive family history. A variety of medications were tried in all our patients to alleviate symptoms, but their efficacy was variable, partial and/or transitory. The most effective therapies were antihistamines, venlafaxine, and mexiletine.
Conclusions: The diagnosis and treatment of EM remain challenging. Patients with this condition display a wide spectrum of clinical manifestations and severity, as well as a paucity of resources and structures to support them. Mutations in the SCN9A gene are not always detected.
Analysis of Adversarial Attacks on AI-based With Fast Gradient Sign Method
Authors: Wibawa Sigit
Published: August 2023

Artificial intelligence (AI) has become a key driving force in sectors from transportation to healthcare, and is opening up tremendous opportunities for technological advancement. However, behind this promising potential, AI also presents serious security challenges. This article aims to investigate attacks on AI and security challenges that must be faced in the era of artificial intelligence, this research aims to simulate and test the security of AI systems due to adversarial attacks. We can use the Python programming language for this, using several libraries and tools. One that is very popular for testing the security of AI models is CleverHans, and by understanding those threats we can protect the positive developments of AI in the future. this research provides a thorough understanding of attacks in AI technology especially in neural networks and machine learning, and the security challenge we face is that adding a little interference to the input data causes the AI ​​model to produce wrong predictions in adversarial attacks there is the FGSM model which with an epsilon value of 0.1 causes the model suffered a drastic reduction in accuracy of around 66%, which means that the attack managed to mislead the model and lead to incorrect predictions. in the future understanding this threat is the key to protecting the positive development of AI. With a thorough understanding of AI attacks and the security challenges we address, we can build a solid foundation to effectively address these threats.
An Integrative Framework of Job Performance Within Cooperative Organisation in Tanggerang Indonesia
Authors: Adrial Adrial , Ali Juhary
Published: August 2023

In the era of globalization, following several Covid-19 outbreaks, the industry is phasing out its mat recall from this plague. For this study, the author sent a questionnaire to a maximum of 206 participants to be analyzed using SEM-PLS methodologies (processing procedures). Based on the outcomes of the information gathered, excellent habits improve employee motivation, performance, and job happiness. Results from testing indicate that if the parts that have already been discussed have significant repercussions to advance the industry, management should make it mandatory for employees to stick four parts of the employee's name on a stick so that the industry can advance through good. This research has limitations because of its narrow focus on the variables of cultural organization, motivation at work, performance at work, and employee happiness. In light of this, it is hoped that future studies would concentrate on a broader range of section variables, rather than focusing just on the already-explained portions. It is anticipated that you will organize or provide proposals for your future research project.
Analyzing Distribution of Packet Round-Trip Times using Fast Fourier Transformation
Authors: Wang Lixin , Yang Jianhua , Qin Maochang
Published: August 2023

Hackers usually send attacking commands through compromised hosts, called stepping-stones, for the purpose of decreasing the chance of being discovered. An effective approach for stepping-stone intrusion detection (SSID) is to estimate the length of a connection chain. This type of detection method is referred to as the network-based SSID (NSSID). All the existing NSSID approaches use the distribution of packet round-trip times (RTTs) to estimate the length of a connection chain. In this paper, we explore a novel approach – Fast Fourier Transformation (FFT) to analyze the distribution of packet RTTs. We first capture network packets from different stepping-stones in a connection chain, identify and match the Send and Echo packets in each stepping-stone. Packet RTTs can be obtained from matched pairs of packets. We then apply the FFT interpolation method to obtain a RTT time function and finally conduct FFT transformation to the RTT function in each stepping-stone host. Finally, we conduct a complete FFT analysis for the distribution of packet RTTs and present the FFT analysis results in this paper.
Impact of Personality Traits on the Academic Achievement of Students at the College Level
Authors: Sehrish Hussain  , Muhammad Athar Hussain  , Tayyba Sadia
Published: August 2023

This research aims to determine the impact of personality traits on the academic performance of students at the college level. Research questions and research objectives lead the study. Objectives were; to enumerate the different personality traits that college students display which the five-component model theory explains, to evaluate the connection between a student’s personality characteristics and academic success, to analyze many personality traits that affect students’ academic success, and to make suggestions for how to solve the issue so that more studies may be done. The survey research design was used to accomplish the objectives. The study focused on undergraduate students from Government colleges of District Rahim Yar Khan. 400 ADP students were chosen from a target population of 7 Government colleges (girls & boys) in Sadiqabad, Khanpur, and Rahim Yar Khan by using the simple random technique. A five-point Likert scale i.e. SD, D, UD, A, SA self-structured questionnaire was used to collect data from the participants. The collected data were analyzed by using SPSS software with descriptive statistics (percentage, mean, and standard deviation). On the basis of the conclusion, there is a significant relationship between panic situation and personality; task handling and efficiency; skills and social situation with a positive correlation at α=0.05
Penderitaan dan Respons Orang Percaya: Upaya Reflektif Kesetiaan bagi Spiritualitas Iman Kristen
Authors: Arifianto Yonatan Alex , Purdaryanto Samuel , Santoso Anton
Published: August 2023

Penderitaan adalah sesuatu yang wajar jika dihindari oleh manusia, merespons penderitaan dengan cara yang salah akan menghasilkan hal-hal negatif. Penelitian ini bertujuan untuk memberikan pemahaman dan konsep yang benar terhadap penderitaan sebagai reflektif spritualitas bagi iman Kristen. Penulisan artikel ini mengunakan pendekatan kualitatif dan studi literatur. Hasilnya adalah sebagai berikut. Pertama, orang percaya dapat memahami secara benar konsep penderitaan dalam teologi Kristen, sehingga orang percaya memiliki sikap, dan respons yang positif. Kedua, orang percaya dapat mengerti konsep reflektif dalam perspektif filosofis dan biblis tentang penderitaan yang direfleksikan bagi kesetiaan orang percaya sebagai kesadaran untuk menerima penderitaan yang diizinkan Tuhan. Sebab melalui hal itu seseorang dapat memiliki paradigma yang benar dalam menghadapi penderitaan, lalu memunculkan kesetiaan dan pribadi yang mengandalkan Tuhan ketika berada dalam penderitaan. Dalam kajian ini penderitaan yang dialami oleh Yesus dan tokoh Alkitab memberikan teladan bahwa sejatinya penderitaan adalah baik bagi mereka.
Nghiên cứu dự báo cường độ bê tông xốp và xác định tương quan với các tham số đầu vào bằng máy vec tơ hỗ trợ
Authors: Lý Hải Bằng
Published: August 2023

Bê tông xốp (BTX) là một loại vật liệu xây dựng với nhiều ưu điểm và được sử dụng rộng rãi trong xây dựng công trình để giảm tải trọng cho kết cấu. Cường độ nén là một đặc trưng cơ học quan trọng của bê tông nói chung và của BTX nói riêng, nên việc ước tính nhanh, chính xác đại lượng này rất quan trọng. Nghiên cứu này đề xuất ứng dụng mô hình máy vec tơ hỗ trợ (SVM) để dự báo cường độ BTX và xây dựng mối tương quan giữa các yếu tố đầu vào của bài toán với mục đích tối ưu hóa quá trình thiết kế BTX. Bộ cơ sở dữ liệu gồm 220 kết quả thí nghiệm cường độ BTX được thu thập và dùng để xây dựng, kiểm chứng năng lực dự báo của mô hình SVM. Các yếu tố đầu vào của bài toán được xét tới là tỷ trọng BTX, tỷ lệ nước/xi măng, và tỷ lệ cát/xi măng. Kết quả cho thấy SVM là một công cụ dự báo rất tốt cường độ nén của BTX với các tiêu chí đánh giá hiệu suất như căn của sai số toàn phương trung bình RMSE = 3.475 MPa, sai số tuyệt đối trung bình MAE = 2.816 MPa và hệ số xác định R2 = 0.930. Cuối cùng, biểu đồ phụ thuộc được phát triển để xây dựng tương quan giữa ba biến đầu vào nói trên với cường độ nén của BTX, giúp ích cho các kỹ sư vật liệu trong công tác thiết kế cấp phối.
Nghiên cứu ảnh hưởng của một số loại phụ gia siêu hóa dẻo đến tính công tác và cường độ của bê tông xi măng
Authors: Đỗ Duy Tùng
Published: August 2023

Bài báo trình bày những kết quả nghiên cứu về tính công tác và cường độ chịu nén của bê tông xi măng khi thay đổi các loại phụ gia siêu dẻo (các gốc khác nhau như Sulfonat napthalen formaldehyde - SNF, Lignosulphunates - LSF và Polyacrylate) với xi măng Hoàng Thạch đang sử dụng phổ biến ở Miền Bắc Việt Nam. Kết quả thực nghiệm cho thấy tính công tác và cường độ chịu nén của bê tông xi măng sử dụng các loại phụ gia siêu dẻo khác nhau như Sikament NN (gốc SNF), Sikament R4 (gốc LSF), Rheobuild 561 (gốc Polyacrylate) với cùng liều lượng 0.8 l/100kg xi măng PCB30 ở các ngày tuổi khác nhau cho thấy có sự khác biệt. Độ sụt của bê tông sử dụng Silikament NN là cao nhất, trong khi Rheobuild 561 là thấp nhất. Cường độ chịu nén ở 28 ngày tuổi của bê tông sử dụng Rheobuild 561 là cao nhất, trong khi sử dụng Silikament NN là thấp nhất. Từ đó, cho thấy cần kiểm tra tính tương thích của xi măng và phụ gia trước khi sản xuất bê tông để lựa chọn loại phụ gia sử dụng phù hợp với mục đích, yêu cầu cụ thể.
Ứng dụng phương pháp khoa học dữ liệu để dự báo tuổi phát triển của sâm và phân tích các yếu tố ảnh hưởng
Authors: Ngô Thị Thu Tình  , Đỗ Quang Hưng  , Nguyễn Phương Linh
Published: August 2023

Tuổi phát triển của sâm (Cultivation ages of ginseng – CAG) là yếu tố quan trọng ảnh hưởng đến chất lượng và giá thành của sâm. Những tiến bộ gần đây trong khoa học dữ liệu đã tạo ra những lợi ích to lớn cho đa dạng các ứng dụng thực tế. Trong lĩnh vực khoa học dữ liệu, học máy đóng một vai trò quan trọng để khám phá thông tin chi tiết từ dữ liệu. Nghiên cứu này dựa trên cơ sở dữ liệu thực nghiêm thu thập được  nhằm xây dựng và đánh giá hiệu suất của 3 mô hình máy học: Tăng cường độ dốc cực cao - Extreme Gradient Boosting (XGB), Tăng cường độ dốc nhẹ - Light Gradient Boosting (LGB) và Tăng cường độ dốc - Gradient Boosting (GB) trong việc dự đoán CAG. Các mô hình được phát triển dựa trên 106 mẫu dữ liệu với chín tham số đầu vào và một tham số đầu ra. Kỹ thuật xác thực chéo K-lần được sử dụng để nâng cao khả năng tổng quát hóa và hiệu suất dự đoán của mô hình. Quan trọng hơn, trong nghiên cứu này XGB mô hình được tối ưu hóa để chọn siêu tham số. Dự báo hiệu suất của tối ưu XGB mô hình được so sánh với 2 mô hình LGB và GB. Kết quả cho thấy XGB là mô hình tốt nhất với hiệu suất dự đoán rất cao (R2=0,964; RMSE=0,148 năm, MAE=0,107 năm). Ngoài ra, kỹ thuật tầm quan trọng của tính năng (Feature importance) được thực hiện để đánh giá ảnh hưởng của các biến đầu vào đối với CAG dự đoán.
Tác động của cấu trúc kiểm soát nội bộ đến hiệu quả tài chính tại các doanh nghiệp ngành xây dựng niêm yết trên thị trường chứng khoán Việt Nam
Authors: Hoàng Thị Hồng Lê  , Đỗ Thị Huyền  , Phan Thùy Dương
Published: August 2023

Bài báo trình bày sự ảnh hưởng của cấu trúc kiểm soát nội bộ đến hiệu quả tài chính của các doanh nghiệp ngành xây dựng niêm yết trên thị trường chứng khoán Việt Nam. Nghiên cứu được thực hiện trên dữ liệu sơ cấp thu thập bằng bảng câu hỏi  và dữ liệu thứ cấp thu thập từ báo cáo tài chính của các doanh nghiệp xây dựng niêm yết trên thị trường chứng khoán Việt Nam được lấy mẫu. Kết quả nghiên cứu thực nghiệm cho thấy doanh nghiệp xây dựng có môi trường kiểm soát lành mạnh, việc đánh giá rủi ro được thực hiện tốt, việc thực thi đúng và đủ các quy trình được thiết kế phù hợp, việc truyền thông hiệu quả, việc giám sát tốt thì doanh nghiệp thường có hiệu quả tài chính tốt.
Nghiên cứu, thiết kế, chế tạo máy CNC phay mạch in phục vụ công tác đào tạo
Authors: Hoàng Thế Phương
Published: August 2023

Hiện nay, các máy móc thiết bị đều không thể thiếu mạch điện tử bên trong để điều khiển thiết bị hoạt động theo ý muốn. Các sinh viên học ngành kỹ thuật đều được đào tạo về quy trình thiết kế mạch điện tử trên máy tính và chế tạo ra mạch in thực tế. Đối với công đoạn chế tạo mạch sau khi đã có file thiết kế thì hầu hết sinh viên đều sử dụng phương pháp làm thủ công, thực hiện thao tác ăn mòn bằng hóa chất. Điều này dẫn đến mạch sau khi chế tạo không đảm bảo được độ chính xác như file thiết kế vì khi ăn mòn bằng hóa chất có thể dẫn đến trường hợp: ăn mòn không hết, ăn mòn quá nhiều. Điều này sẽ ảnh hưởng đến chất lượng của mạch in sau khi chế tạo, và mạch có thể không hoạt động được ổn định đúng chức năng. Nếu sử dụng máy CNC (Computer Numerical Control) để thực hiện công đoạn phay đường mạch và khoan chân linh kiện thì sẽ đảm bảo được độ chính xác và chất lượng đường mạch được tốt hơn. Nội dung bài nghiên cứu này, tác giả thực hiện việc nghiên cứu, chế tạo máy phay mạch CNC phục vụ công tác đào tạo cho sinh viên trường Đại học Công nghệ Giao thông vận tải.