bluuebunny/crossref_metadata_2025 huggingface dataset:
EFFECT OF FIXED FACILITATOR MODEL ON NCE TECHNOLOGY EDUCATION STUDENTS’ ATTITUDE AND ACADEMIC PERFORMANCE IN NIGER STATE
Authors: TUKURA CHARLES SAIDU , Ibrahim Ismail Kuta
Published: April 2020

This study title Effect of fixed facilitator model on NCE Technology Education Students’Attitude and Academic Performance in Niger State, Nigeria. The study used quasiexperimental design. The total population was 942, while the sample size was 216educational technology from two colleges of Education in Niger State. The test instrumentdeveloped by the researcher for the study was the Student‘s Performance AssessmentInstrument (SPAI) and Technology Education Student Attitude Questionnaire (TESAQ)which contained 50 questions. The statistic used were t-test independent sample cumulativemean and the finding of the study standard deviation. The findings of the study revealed thatNCE students performed better when taught with fixed facilitator model compared to theircounter parts taught with lecture method. Based on the results obtained the researcherrecommended that: the instructors of Technology Education should endeavor to use fixedfacilitator model in teaching Technology Education in college of education.
HOW ENGAGING ARE YOU?
Authors: MOHAMAD ROSMAN MOHAMAD RAHIMI , Ismail Mohd Nasir , Masrek Mohamad Noorman
Published: April 2020

Digital library engagement is the extensive use of digital library features and services. Contrary to the traditional concept of usage, DL engagement evaluates the use of an information system based on multiple dimensions; affective, cognitive, and behavioural. Presently, there is scarce evidence and research on the level of DL engagement. Lack of such evidence caused under-utilization of DL resources. Therefore, the purpose of this study is to investigate the level of DL engagement in the context of Malaysian research universities. A quantitative study was conducted; an instrument was distributed to postgraduate students at five Malaysian research universities. A total of 492 responses were recorded and descriptively analyses using Statistical Package for Social Sciences version 24. Frequency, Independent sample t-test, and Analysis of Variance (ANOVA) were performed to identify significance difference and mean distribution of data among the participating universities. Results show that respondent’s age and research domain showed a significant effect on DL engagement, while gender, study mode, level of study, semester, and the university did not show any significant effect on DL engagement.
THE BUFFERING EFFECT OF PERCEIVED ORGANIZATIONAL SUPPORT ON THE RELATIONSHIP BETWEEN WORK ENGAGEMENT AND TURNOVER INTENTION
Authors: GADI PAUL DUNG , Kee Daisy Mui Hung
Published: April 2020

Turnover among academic staff is an increasing concern in public universities in Nigeria. This article aims to examine the correlation between work engagement (WE) and turnover intention (TI), also, to test the moderating effect of perceived organizational support (POS) in the relationship between work engagement and turnover intention. Using a cross-sectional study, this paper examined the influence of work engagement on turnover intention in public universities in Nigeria from April to September 2019. A usable sample of 375 questionnaires was collected among academicians in the public universities in Nigeria and structural equation modeling (PLS-SEM) to analyze the hypotheses. The result showed that work engagement was significant and negatively related to turnover intention and perceived organizational support plays a great role in moderating the relationship between work engagement and turnover intention.
BRIDGING THE MISSING LINKS IN THE IMPLEMENTATION OF TECHNICAL VOCATIONAL EDUCATION AND TRAINING CURRICULUM IN NIGERIA
Authors: Kagara Abdul Bello , Ibrahim Dauda , Wahab Bamidele Kareem
Published: April 2020

The implementation of Technical Vocational Education and Training (TVET) curriculum requires some level of government commitment because of it nature and important towards reducing unemployment. Technical vocational education is a skill acquisition intervention programs that target about learning wisdom which would make people appropriate and productive in designated areas of economic and technological activities. In order to meet the demand of this 21st century implementation of technical vocational education curriculum in Nigeria must in totality be overhauled by ensuring that what is needed to achieve its goal is put in place for positive outcome.  This paper discusses the concept of technical vocational education and training and it’s important towards job creation, the nature of technical vocational education curriculum in technical vocational education institutions, technical vocational education curriculum implementation and the impediments of Technical vocational education curriculum implementation in Nigeria. It was concluded that TVET curriculum implementation faced a lots of challenges. Therefore, all stakeholders in the technical vocational education sub-sector should put hands in deck in order to improve the quality of technical vocational education programs implementation in Nigeria for better outcome
CONSTRAINTS TO EFFECTIVE UTILIZATION OF STUDENT-CENTERED INSTRUCTIONAL STRATEGIES FOR TEACHING BLOCKLAYING, BRICKLAYING AND CONCRETING AT TECHNICAL COLLEGE LEVEL IN NIGER STATE, NIGERIA
Authors: Ibrahim Dauda , Kagara, Abdul Bello  , Alhassan, Ndagi Usman  , Gazali, Sikirulahi Adewole
Published: April 2020

Constraints to effective utilization of student-centered instructional strategies for teaching Blocklaying, Bricklaying and Concreting (BBC) at technical colleges in Niger State, Nigeria. Three research questions and three hypotheses guided the study. A descriptive survey research design was adopted for the study. The study was conducted in the seven technical colleges in Niger state. The target population was 55 respondents consisting of 38 experienced and 17 less experienced teachers. The instrument for data collection was Questionnaire titled Constraints to Effective Utilization of Student-centered Instructional Strategies for Teaching Blocklaying, Bricklaying and Concreting (CEUSISTBBC). The instrument was validated by three experts. Cronbach Alfa was used to ascertain the reliability coefficient of the instrument which was found to be 0.89. Mean and standard deviation was used to answer the research questions while t-test statistic was used to test the hypotheses at 0.05 level of significance. The findings of the study revealed that all the teaching strategies identified are student-centered instructional strategies. Based on the findings, it was recommended that student-centered instructional strategies identified in the study should be made a requirement for teaching/learning situation at technical colleges in Niger state and Federal and state ministry of education should provide adequate funding
Financial Performance and Sustainability in Malaysian Waqf Institutions
Authors: Hanefah Mustafa Mohd , Kamaruddin Muhammad Iqmal Hisham , Masruki Rosnia , Johari Fuadah , Kamarubahrin Aimi Fadzirul
Published: April 2020

This paper aims to measure the financial performance and sustainability in Malaysian waqf private entity and corporations. Examining its performance and sustainability could be useful to assess waqf perpetual existence. Besides that, the waqf private entity and corporations frequently compare actual performance with standards or expectations to enhance the organizations’ achievements. Thus, by using ratio analysis, this study examines five years (2014-2018) annual reports of waqf private entity administered by Pusat Wakaf Majlis Agama Islam Wilayah Persekutuan Sdn. Bhd (PWMSB) and two waqf corporations Pusat Wakaf Selangor (PWS) and Wakaf An-Nur Corporation (WANCorp). The results indicate that only one waqf corporation was financially performed and sustainable in all seven components. The findings provide useful insights into the financial performance and sustainability of waqf private entity and corporations and highlight the need for policy makers in Malaysia and other Muslim countries to give due attention to the holistic accountability of waqf institutions to ensure waqf’s systematic revival. It is hoped that the results and the recommendations of the study would enable the financial reporting and accountability of such institutions at a higher level
ATTITUDE OF NIGERIAN PRIMARY SCHOOL STUDENTS TOWARD MATHEMATICS SUBJECT
Authors: Suleiman Fatima Daudu , Mohd Rameli Mohd Rustam , Ado Muhammad
Published: April 2020

Attitude is an affective variable that can affect the academic life of students significantly. In Nigeria, attitude in mathematics is among the factors influencing performance in maths subject, especially among primary school students. This study aimed at identifying factors that indicate the student’s negative attitude in maths subject. The population of the study is 1,626 from 6 selected primary schools in Nasarawa Local Government Area of Kano, Nigeria. A sample of 384 respondents were selected using the Krejcie and Morgan table. A Math Attitude questionnaire (MAQ) was completed by the respondents which measure the students affect, behaviour and cognitive aspects. The data collected were analysed using the statistical package for social science (SPSS). The results show that the respondents are experiencing a negative attitude in maths subject. It is recommended that parents and teachers are required to provide some supportive measures for changing the student's attitude. If a negative attitude among students is not addressed, the career of students will be very limited and their maths performance will be relatively poor as well
ONLINE IMPRESSIONS ON E-HAILING SERVICES: A STUDY ON POSITIVE AND NEGATIVE SENTIMENTS ON GRAB MALAYSIA AND GO-JEK INDONESIA ON TWITTER PLATFORM
Authors: Yan Chi Emily Chow , GOH HONG LIP , Lim Yee Wui  , Lai Siew Fong  , Alexander Tay Guan Meng
Published: April 2020

The presence of mobile-internet has led to the emergence of the e-hailing industry. As the e-hailing services usage increased, it led riders to share their opinions or discontent after indulging in the services. Therefore, in this study, online sentiments on social media (Twitter) with specific keywords mentioned, were examined to identify the rider opinions towards the e-hailing services in both Malaysia and Indonesia. Service Quality (SERVQUAL) model was used as the foundation to examine the service quality offered by the e-hailing service providers. The dimensions included were: ‘Availability’, ‘Accessibility’, ‘Information’, ‘Comfort’, ‘Safety’, and the additional dimension of ‘Price’. All the data (tweets) collected were classified into either a positive or negative sentiment, and to respective dimensions manually, by referring to keywords. The results revealed that all the dimensions show a negative trend in both countries. ‘Comfort’ and ‘Availability’ was ranked the first in Malaysia and Indonesia respectively, and the results shown were due to riders demanded an e-hailing service that is available anywhere and anytime when they need it. The study results provide a strong reference to practitioners to improve on their service quality and allowed to identify which dimensions were concerned the most by the riders in both countries.
Moderating Role of Corruption Control on firm level determinants of Corporate Sustainability Disclosure Compliance in Nigeria
Authors: Bello Mohammed Sabo , Mohd Said Ridzwana , Johari Jalila , Kamarudin Fakarudin
Published: April 2020

This paper explores the moderating effect of corruption control in strengthening the influence of firm attributes on corporate sustainability disclosure compliance in Nigeria. The study focuses on the existing discussion on mandatory disclosure compliance with corporate governance code. The extent of disclosure compliance is measured using a total unweighted disclosure index, developed from a panel dataset of 118 companies listed in the Nigerian capital market. The companies were selected using a proportionate stratified sampling technique. The dataset for the period of 2011 to 2017 were first analyzed by static panel regression analysis using pooled Ordinary Least Square (OLS), Fixed Effect (FE), and Random Effect (RE) models. The regression models were subjected to further robustness checks under dynamic GMM panel regression analysis, to test for possible endogeneity. The findings revealed significant moderating effect of corruption control, evidenced from the interaction of corruption control with selected firm attributes, namely; industry type, leverage and taxation. The research contributes to the existing literature, as it establishes the importance of control of corruption as an additional factor of corporate sustainability disclosure compliance within the context of Nigeria.
Evaluasi Program Matrikulasi Bagi Mahasiswa Asal Daerah 3T (Studi Evaluatif Menggunakan Model CIPP di IAI Tazkia Bogor)
Authors: Hadi Syamsul
Published: April 2020

Penelitian ini bertujuan untuk mengetahui efektivitas penyelenggaraan program matrikulasi bagi mahasiswa asal daerah 3T (tertinggal, terdepan dan terluar) di tinjau dari komponen konteks, input, proses dan produk dalam program matrikulasi Institut Agama Islam Tazkia Bogor dengan model evaluasi program CIPP Stuffelbeam. Instrumen yang digunakan berupa studi dokumentasi, wawancara, observasi dan angket pada Mahasiswa asal daerah 3T, bagian akademik, pembina dan sumber terkait. Data di analisis melalui triangulasi data (reduksi data, mempresentasikan data dan memverifikasi data). Hasil penelitian menunjukkan, pada komponen konteks, diketahui bahwa program matrikulasi merupakan program wajib di IAI Tazkia untuk level Strata-1 yang ditempuh selama 10 bulan dengan pengawasan 24 jam, mendapat dukungan dari masyarakat, program ini berpengaruh dalam pembentukan kebiasaan mahasiswa dalam belajar dan beribadah. Hasil evaluasi input pada komponen kualifikasi mahasiswa yang tidak sesuai dengan standar program sehingga sebagian mahasiswa terlalu jauh tertinggal dalam bidang akademik dan bahasanya, struktur kurikulum sudah sesuai dengan standar program, standar pengelolaan program sudah pada kategori baik, evaluasi terhadap kondisi sarana/prasarana sudah memadai serta tingkat kesesuaian sarana dan prasarana dengan program sudah sesuai dengan standar dan evaluasi terhadap pembiayaan sudah sesuai standar. Hasil evaluasi proses pada tahapan perencanaan, pelaksanaan dan evaluasi serta pengawasan sudah baik sesuai standar. Hasil evaluasi Produk menunjukkan pada aspek akademik sebagian besar mahasiswa berada pada kategori sangat baik 4%, baik 12%, cukup 40% dan kurang 44%, pada aspek pembinaan 90% kategori baik, 10% kurang dan pada aspek penguasaan bahasa 80% berada pada kategori kurang.
Pembelajaran Online di Tengah Pandemi Covid-19
Authors: Firman Firman , Rahayu Sari
Published: April 2020

Penelitian ini merupakan penelitian kualitatif yang bertujuan untuk memperoleh gambaran pelaksanaan pembelajaran online di Prodi Pendidikan Biologi Fakultas Keguruan dan Ilmu Pendidikan (FKIP) Universitas Sulawesi Barat (Unsulbar) sebagai upaya menekan penyebaran covid-19 di lingkungan kampus. Subjek penelitian adalah  mahasiswa Prodi Pendidikan Biologi. Data dikumpulkan dengan wawancara melalui telepon. Analisis data dilakukan menggunakan teknik analisis interaktif Miles & Huberman. Hasil penelitian menunjukkan bahwa: (1) mahasiswa telah memiliki fasilitas-fasilitas dasar yang dibutuhkan untuk mengikuti pembelajaran online; (2) pembelajaran online memiliki fleksibilitas dalam pelaksanaannya dan mampu mendorong munculnya kemandirian belajar dan motivasi untuk lebih aktif dalam belajar; dan (3) pembelajaran jarak jauh mendorong munculnya perilaku social distancing dan meminimalisir munculnya keramaian mahasiswa sehingga dianggap dapat mengurangi potensi penyebaran Covid-19 di lingkungan kampus.
Faktor Faktor Adversity Quotient dalam Kemampuan Pemecahan Masalah Pembuktian Matematis Topik Teori Grup
Authors: Hakim Fauziah
Published: April 2020

Salah satu masalah matematika yang sering dihadapi mahasiswa dalam proses pembelajaran adalah masalah pembuktian matematis. Pembuktian matematis hadir di banyak mata kuliah, salah satunya pada topik Teori Grup yang ada pada mata kuliah Struktur Aljabar. Pemecahan masalah pembuktian matematis memerlukan daya juang dalam penyelesaiannya mengingat prosesnya yang memerlukan pemikiran tingkat tinggi. Salah satu faktor yang diduga terkait adalah adversity quotient. Penelitian ini bertujuan melihat pengaruh adversity quotient terhadap kemampuan pemecahan masalah pembuktian matematis topik Teori Grup. Penelitian ini menggunakan pendekatan kuantitatif dengan metode korelasional. Populasi pada penelitian ini adalah seluruh mahasiswa Program Studi Pendidikan Matematika Universitas Sulawesi Barat yang sedang memprogramkan mata kuliah Struktur Aljabar pada tahun akademik 2019/2020, sedangkan sampelnya adalah 30 orang mahasiswa yang dipilih secara acak dari populasi tersebut. Data yang diperoleh dari Adversity Response Profile (ARP) Quick Take™ dan Tes Kemampuan Pemecahan Masalah Pembuktian Matematis Topik Teori Grup dianalisis dengan teknik regresi linear sederhana berbantuan perangkat lunak dengan uji prasyarat berupa uji normalitas dan uji linearitas. Pengujian yang digunakan adalah uji dua pihak dengan taraf signifikansi 5%. Berdasarkan analisis data diperoleh kesimpulan bahwa adversity quotient berpengaruh signifikan terhadap kemampuan pemecahan masalah pembuktian matematis topik Teori Grup. Dari hasil analisis lanjutan juga diperoleh bahwa pengaruh tersebut merupakan pengaruh positif namun berada pada kategori  lemah.
Pengembangan Katalog Jaringan Hewan Sebagai Media Pembelajaran Materi Jaringan Hewan di SMA
Authors: Nurhidayah Nurhidayah , Haryunita Haryunita
Published: April 2020

Jenis penelitian yang digunakan adalah penelitian dan pengembangan (R&D) yang bertujuan untuk mengembangkan media pembelajaran katalog jaringan hewan yang bersifat valid, praktis dan efektif. Desain penelitian dan pengembangan mengacu pada model ADDIE yang secara garis besar terdiri atas tahapan analisa (analysis), desain/perancangan (design), pengembangan (development), implementasi/penerapan (implementation) dan evaluasi/umpan balik (evaluation). Instrumen penilaian terdiri atas tiga yaitu (1) instrumen kevalidan berupa angket kevalidan media katalog jaringan hewan dan instrumen penilaian kevalidan angket, (2) instrumen kepraktisan berupa angket respon guru dan respon siswa terhadap media katalog jaringan hewan, dan (3) instrumen keefektifan berupa tes hasil belajar siswa. Berdasarkan hasil analisis data, diperoleh rata-rata kevalidan media oleh dua validator ahli yaitu sebesar 4,3 yakni berada pada kategori valid. Pada penilaian kepraktisan media, diperoleh respon guru sebesar 92% dan respon siswa sebesar 86,6%, yang berarti media katalog jaringan hewan telah memenuhi kriteria kepraktisan. Adapun untuk keefektifan media diperoleh hasil 65,00% siswa mencapai nilai ketuntasan belajar, yang berarti bahwa media katalog jaringan hewan berada pada kategori efektif. Berdasarkan hasil penelitian dapat disimpulkan bahwa media pembelajaran katalog jaringan hewan yang dikembangkan bersifat valid, praktis dan efektif.
Endoscopic transnasal resection of the CP angle schwannoma
Authors: Kiyofuji Satoshi , Shin Masahiro , Kondo Kenji , Koike Tsukasa , Kin Taichi , Saito Nobuhito
Published: April 2020

Cerebellopontine (CP) angle tumors are often resected via retrosigmoid craniotomy; however, sometimes cranial nerves (CNs) make their resection more complex. In such cases, the endoscopic transnasal approach can avoid such manipulations as delivering surgical instruments over CNs or peeling off CNs from the tumor, minimizing the risk of postoperative deficits. A 35-year-old man presented with a 37-mm cystic tumor in the right CP angle, and preoperative 3D fusion images revealed that multiple CNs (VII, VIII, and lower CNs) were running on the tumor posteriorly. The endoscopic transnasal approach enabled safe subtotal resection without causing neurological deficits, and the patient underwent stereotactic radiosurgery for the residual schwannoma.

The video can be found here: https://youtu.be/xKLwdDsLpWA.
Endoscopic endonasal approach for clipping of a PICA aneurysm
Authors: Goldschmidt Ezequiel , Lavigne Philippe , Snyderman Carl , Gardner Paul A.
Published: April 2020

This video depicts the case of a 59-year-old woman that presented to the emergency department with the worst headache of her life. CT showed subarachnoid hemorrhage and digital subtraction angiogram demonstrated a right-side posterior inferior cerebellar artery (PICA) aneurysm. Given the medial and ventral position of the aneurysm, deep to the lower cranial nerves, which obviated distal control from an open approach, and the absence of an endovascular option able to reliably preserve the PICA, an endonasal approach was offered. A far medial approach was performed, and the aneurysm was successfully clipped. The patient developed a postoperative CSF leak with persistent posthemorrhagic hydrocephalus treated with reexploration and an eventual ventriculoperitoneal shunt. The patient was discharged without neurological deficits.

The video can be found here: https://youtu.be/_9hsM2CaMow.
Expanded endoscopic endonasal transpterygoid transmaxillary approach for a giant trigeminal schwannoma
Authors: Martínez-Pérez Rafael , Zachariah Marcus , Li Ruychen , Silveira-Bertazzo Giuliano , Carrau Ricardo L. , Prevedello Daniel M.
Published: April 2020

Atypical trigeminal schwannomas (ATSs) are notorious for their ability to invade the skull base. An expanded endoscopic endonasal approach (eEEA) provides direct access to the tumor with no need for cerebral retraction or manipulation of neurovascular structures. Herein, we present a case of a large temporal fossa extradural lesion with secondary invasion of the sella, clivus, and temporal and infratemporal fossae in a 49-year-old male with severe vision loss. A transpterygoid transmaxillary approach was performed. Gross-total removal was achieved and pathology revealed the diagnosis of ATS. Visual function fully recovered in the right side and the patient has been uneventfully followed since surgery.

The video can be found here: https://youtu.be/6pSwdYsN9hk.
Transorbital approach for endoscopic repair of encephalocele
Authors: Sarris Christina E. , Santarelli Griffin D. , Little Andrew S.
Published: April 2020

This video demonstrates the transorbital approach for endoscopic repair of an anterior skull base encephalocele. The patient is a 77-year-old man with morbid obesity and a 2-year history of left-sided cerebrospinal fluid (CSF) rhinorrhea and radiographic evidence of an anterior skull base defect with an encephalocele. An endoscopic transorbital approach was chosen for repair because of its minimally invasive access to the anterolateral skull base. The patient had an excellent clinical outcome with resolution of the CSF rhinorrhea and preservation of full vision and extraocular muscle function.

The video can be found here: https://youtu.be/oDhZgnaiZ00.
Application of hybrid cranioendoscopic approaches in anterior skull base surgery
Authors: Joyce Evan , Karsy Michael , Makarenko Serge , Oakley Gretchen M. , Couldwell William T.
Published: April 2020

Anterior skull base approaches have included endoscopic or open microsurgical approaches for intracranial pathologies. However, discussion of a combined hybrid, cranioendoscopic approach, leveraging the benefits of both techniques, has been limited. Here we describe a case of a combined endoscopic, endonasal, and open microsurgical frontotemporal approach for resection of a complex anterior skull base lesion. A 62-year-old man with a large meningioma extending intradurally through the cribiform plate and sphenoethmoidal sinuses underwent a cranioendoscopic resection. Surgical techniques, including repair of the anterior skull base defect as well as complication avoidance and the coordination of multiple surgeons, are discussed.

The video can be found here: https://youtu.be/Ti9tUUdWgJc.
Hemorrhagic direct traumatic carotid-cavernous fistula during endoscopic transsphenoidal surgery: intraoperative management and endovascular treatment
Authors: Cossu Giulia , Atkins Tyler , Hajdu Steven D. , Puccinelli Francesco , Daniel Roy T. , Messerer Mahmoud
Published: April 2020

Carotid-cavernous fistula (CCF) is a rare complication after transsphenoidal surgery with only 10 cases published (Ahuja et al., 1992; Cinar et al., 2013; Cossu et al., 2020; Dolenc et al., 1999; Kalia et al., 2009; Karaman et al., 2009; Kocer et al., 2002; Koitschev et al., 2006; Pigott et al., 1989; Takahashi et al., 1969). Intraoperative findings vary from unrecognized events to life-threatening hemorrhages.

We provide a description of the management of an acute CCF occurring during sphenoidotomy in a patient with pituitary apoplexy. Osteotomy performed in the rostrum resulted in a fracture, which extended toward the intracavernous carotid artery.

Bleeding was managed with mechanical compression. Endovascular treatment allowed closure of the fistula through transarterial coiling and glue. Arterial patency was preserved and the patient had no new neurological deficit.

Drilling should be considered over osteotomy for the anterior sphenoidotomy.

The video can be found here: https://youtu.be/0Me23xIVeNI.
Endoscopic endonasal resection of giant pediatric craniopharyngioma: impact on hypothalamic edema
Authors: Gerges Mina M. , Youngerman Brett , Anand Vijay K. , Greenfield Jeffrey P. , Schwartz Theodore H.
Published: April 2020

An 8-year-old child presented with fatigue, weight loss, and visual deterioration. MRI demonstrated a craniopharyngioma with compression of the optic chiasm and extensive edema on the hypothalamus and optic radiations. The tumor was completely removed via an endoscopic endonasal approach. Postoperatively, vision improved and hypothalamic edema completely resolved within 5 days. This video demonstrates the technical nuances of the surgery and discusses the impact of surgery on the hypothalamic nuclei in pediatric patients.

The video can be found here: https://youtu.be/wxkBmhTPi6c.
Endoscopic endonasal resection of a clival chordoma with massive brainstem compression
Authors: Shahein Mostafa , Albonette-Felicio Thiago , Silveira-Bertazzo Giuliano , Martinez-Perez Rafael , Zachariah Marcus , Carrau Ricardo L. , Prevedello Daniel M.
Published: April 2020

Chordomas are rare tumors that occur at an incidence rate of 0.8 per 100,000. Thirty-five percent of chordomas occur in the spheno-occipital region. We present a case of a clival chordoma that had severe brainstem compression. The patient had a 1-year history of slurred speech and left facial weakness (House-Brackmann 3). The endoscopic endonasal transclival approach gave a panoramic view of the region without the necessity of brain retraction or manipulation of the surrounding cranial nerves. Gross-total resection was achieved and no CSF leak was encountered postoperatively. The left facial weakness improved to House-Brackmann 1.

The video can be found here: https://youtu.be/DzW9Q6ckTHw.
Endoscopic endonasal transcavernous approach for invasive corticotroph pituitary adenoma
Authors: Lan Ming-Ying , Wang Wei-Hsin
Published: April 2020

This is a 37-year-old woman who presented with weight gain, a moon-shaped face, and muscle weakness for 4 months. Cushing’s disease was confirmed after a series of diagnostic tests. MRI demonstrated a pituitary macroadenoma with right cavernous sinus invasion and encasement of the right ICA. An endoscopic endonasal approach was performed, and gross-total resection could be achieved without injury of the cranial nerves. The Cushing’s syndrome improved gradually after the surgery. Histopathology revealed a corticotroph adenoma. In this surgical video, we demonstrate the strategies of tumor resection according to a surgical anatomy-based classification of the cavernous sinus from an endonasal perspective.

The video can be found here: https://youtu.be/aNXFRdGfjpI.
Combined strategy of maximal endoscopic endonasal resection and early radiation therapy for complex cystic and solid craniopharyngioma: operative video
Authors: Liu James K. , Zhao Kevin , Eloy Jean Anderson
Published: April 2020

Craniopharyngioma is a rare and benign intracranial tumor of the sellar and suprasellar region. Historically, these tumors were mostly accessed through transcranial corridors and resected with microsurgical techniques. Endoscopic endonasal surgery has recently gained popularity in the treatment of these tumors and has shown at least comparable results to transcranial approaches. The endoscopic endonasal approach provides direct midline access through a transplanum transtuberculum corridor and gives excellent visualization of the undersurface of the optic chiasm to allow safe bimanual sharp dissection of the tumor from the hypothalamus. In this operative video, we demonstrate the case of a 56-year-old female who had a complex craniopharyngioma with solid and cystic components extending superolaterally into the right frontal lobe. This lesion was invasive and partially encased the right optic nerve, optic chiasm, and anterior communicating artery complex. Although a traditional transcranial approach could have been utilized, we elected for an endoscopic endonasal approach for a maximal safe near-total resection, preserving the neurovascular structures. The patient underwent radiation therapy with favorable regression of the residual tumor on subsequent imaging studies. This case illustrates the feasibility of a combined strategy of maximal safe endoscopic endonasal resection followed by early radiation therapy for a complex, invasive cystic and solid craniopharyngioma. The technical nuances of safe bimanual microsurgical dissection of tumor adhesions off of critical neurovascular structures are demonstrated.

The video can be found here: https://youtu.be/z0AINLpRZGs.
Combined endoscopic endonasal and sublabial transmaxillary approach for resection of giant infratemporal fossa schwannoma with intracranial extension: operative video and technical nuances
Authors: Liu James K. , Zhao Kevin , Vazquez Alejandro , Eloy Jean Anderson
Published: April 2020

Tumors of the infratemporal fossa (ITF) are surgically formidable lesions due to their deep location and proximity to critical neurovascular structures. Selecting the optimal surgical corridor for a giant ITF lesion with extensive medial and lateral extension can be challenging due to the limited surgical freedom offered by each individual approach. In this operative video, we demonstrate a case of a 44-year-old female with a giant ITF schwannoma with intracranial extension and erosion of the central skull base. Although we considered several surgical approaches, including a standard binostril endoscopic endonasal approach and an endoscopic Denker’s approach, we eventually chose a combined endoscopic endonasal and sublabial (Caldwell-Luc) transmaxillary approach. This combined approach provides significantly greater surgical freedom than a pure endonasal route to the lateral ITF. The sublabial Caldwell-Luc corridor provides a more direct “head-on” trajectory to the target of the lateral ITF than the pure endonasal route. This combined approach provides a multiportal, multicorridor access, allowing for more surgical freedom and preservation of the piriform aperture and nasolacrimal duct. This case illustrates the versatility of the combined endoscopic endonasal and sublabial transmaxillary approach for giant ITF tumors with significant lateral extension. The technical nuances and surgical concepts are demonstrated in this operative video manuscript.

The video can be found here: https://youtu.be/gy-pkjLdDgE.
Management of arterial injuries in endoscopic endonasal approaches
Authors: McDowell Michael M. , Zenonos Georgios , Wang Eric , Snyderman Carl H. , Gardner Paul A.
Published: April 2020

This is the case of a 76-year-old woman presenting with progressive right vision loss consisting of a right eye temporal field cut and severe visual acuity loss. An MRI was performed showing a suprasellar mass for which she had been referred to our center for an endoscopic endonasal approach. The tumor was found to be densely adherent to adjacent structures, and an ophthalmic artery and A1–A2 junction injury were sustained during resection. The management of intraoperative vascular injuries is described.

The video can be found here: https://youtu.be/JJY6nYKTCSg.
Endoscopic endonasal translacerum approach for resection of petroclival chondrosarcoma
Authors: Almeida Joao Paulo , Cappello Zachary , Borghei-Razavi Hamid , Recinos Pablo F. , Sindwani Raj , Kshettry Varun R.
Published: April 2020

Petroclival chondrosarcomas are a formidable surgical challenge given the close relationship to critical neurovascular structures. The endoscopic endonasal approach can be utilized for many petroclival chondrosarcomas. However, tumors that extend to the inferior petrous apex require working behind the internal carotid artery (ICA). We present a case of a 33-year-old with a 1-year history of complete abducens palsy, with imaging showing an enhancing mass centered at the left petroclival fissure and inferior petrous apex behind the paraclival carotid artery and extending down into the nasopharynx abutting the cervical ICA. In this video, we describe the surgical steps of the endoscopic endonasal translacerum approach with ICA skeletonization and mobilization. We also highlight the relevant surgical anatomy with anatomical dissections to supplement the surgical video. The patient did well without complications. Postoperative MRI demonstrated complete resection and pathology revealed grade II chondrosarcoma. He underwent adjuvant proton beam radiotherapy.

The video can be found here: https://youtu.be/80QXALJW9ME.
Endoscopic endonasal surgery for giant pediatric craniopharyngioma
Authors: Mohyeldin Ahmed , Hwang Peter , Grant Gerald A. , Fernandez-Miranda Juan C.
Published: April 2020

Pediatric craniopharyngiomas that were once thought to be inoperable or considered only for salvage medical therapy are now being reconsidered for aggressive surgical resection via endoscopic endonasal approaches. Here we review the operative video case of an 11-year-old with a giant complex craniopharyngioma that was resected via an endoscopic endonasal approach. Due to the extent of tumor burden near the basilar apex, a transclival approach was necessary. To accomplish this, a wide sphenoidotomy, posterior ethmoidectomy, and resection of the middle turbinate were necessary to create enough working space for the resection. We also highlight several key innovations in pediatric endoscopic endonasal surgery management and underscore a multidisciplinary approach that allows for the safe and successful treatment of these lesions. Our multidisciplinary team involves an experienced fellowship-trained endoscopic skull base surgeon and otolaryngologist, as well as a pediatric neurosurgeon, pediatric endocrinologist, pediatric anesthesiologist, and pediatric intensivists who play important roles in the preoperative, intraoperative, and postoperative phases of care of the patient. Finally, we discuss critical surgical decision points including pituitary transposition, which has a lot of conceptual appeal when it is anatomically feasible but unfortunately, in our experience, has low functional preservation rates. Initially, we always aim to utilize pituitary transposition for tuberoinfundibular craniopharyngiomas, and once the relationship between the tumor and the stalk is determined, a decision on whether to preserve or sacrifice the stalk and pituitary gland is made. In this particular case, there was a salvageable stalk and the transposition was performed knowing that the chances for functional preservation were low.

The video can be found here: https://youtu.be/ClL73FU5QIU.
List apostolski Benedykta XVI z okazji 1600. rocznicy śmierci św. Jana Chryzostoma
Authors: XVI Benedykt
Published: April 2020

List apostolski Benedykta XVI z okazji 1600. rocznicy śmierci św. Jana Chryzostoma
SINTESIS DAN KARAKTERISASI KOMPOSIT FIBER SABUT KELAPA SAWIT DENGAN RESIN EPOKSI
Authors: Setiawan Adhi
Published: April 2020

The use of natural fiber as reinforcement for epoxy polymer composites is currently a concern for researchers because it is environmentally friendly so it can replace glass fiber or carbon in engineering applications. Palm fiber is a type of natural fiber that is produced by the cooking oil industry as a component of waste. The surface modification of fiber with NaOH solution is one of the factors that determines level of adhesion to the epoxy polymer matrix. This study to analyze the effect of alkali treatment on the morphology and characteristics of fiber. In addition, the effect of palm fiber composition on the mechanical properties of composites were studied. Alkali treatment on fiber was carried out using 10% wt sodium hidroxide solution. The morphology and characteristics palm fiber before and after alkali treatment were analyzed using SEM-EDX, XRD, and FTIR. Tensile tests were carried out on composites with treated fibers and without treatment with sodium hidroxide solution. The results showed that alkali treatment caused the surface morphology of the fiber to be finer due to the loss of lignin and hemicellulose components. Alkali treatment fiber can increase the tensile strenght. Composites with fiber and resin composition of 4%: 96% wt that have undergone alkali treatment have a maximum tensile strength of 21.60 MPa.
Türkiye’de Yükseköğretim Çalışmaları: Eğilimler ve Öneriler
Authors: SENAY Hanife Hilal , ŞENGÜL Mehmet , SEGGİE Fatma Nevra
Published: April 2020

Son yıllarda, özellikle 2015 senesinde yükseköğretim çalışmalarının bir doçentlik bilim alanı olarak tanımlanmasıyla birlikte, ülkemizde yükseköğretim alanında yapılan çalışmalarda bir artış gözlenmektedir. Bilimsel araştırmaların yanı sıra yükseköğretim odaklı derneklerin ve merkezlerin kurulması, konferans ve çalıştayların düzenlenmesi ve yükseköğretim çalışmaları alanına yönelik dergilerin çıkarılması bu alana verilen önemin giderek artmasına ve alandaki sorunların çözümüne yönelik çabaların birer göstergesi olarak görülebilir. Bu açıdan bakıldığında, ülkemizde yükseköğretim alanında gerçekleştirilen tüm bu akademik faaliyet ve araştırmaların çıktılarının değerlendirilmesi yükseköğretim alanının gelişmesi ve veri-temelli politikaların oluşturulması açısından önem arz etmektedir. Bu araştırmanın amacı, ülkemizde yükseköğretim alanında yapılan çalışmalardaki eğilimleri ortaya çıkarmaktır. Bu hedef doğrultusunda, çalışmada Türkiye’deki yükseköğretim odaklı düzenlenen konferanslardaki sunulan çalışmalar ile yine bu odakta çıkarılan dergilerdeki makaleler incelenmiştir. Yapılan içerik analizi sonucunda, çalışmadaki öne çıkan bulgulardan bir tanesi en çok araştırılan konunun lisans programları ve bu programların değerlendirilmesi ve geliştirilmesine yönelik çalışmalar olduğudur. Bunun dışında bildirilerde ve makalelerde öne çıkan temalar farklılaşmaktadır. Yapılan çalışmaların araştırma yöntemlerinin benzerlik gösterip ampirik çalışmaların daha ön planda olduğu ve nitel araştırma yaklaşımlarının görece daha sık kullanıldığı bulunmuştur. Çalışmanın sonuçları ışığında, yükseköğretimle ilgili ve ilişkili araştırmacılara, konferans düzenleyicilerine, dergi editörlerine, idarecilere ve politika yapıcılarına, politikaların ve araştırmaların birbirini beslemesine ve birbirinden beslenmesine olanak sağlaması yönünde yapıcı öneriler sunulmaktadır.
Los datos, las analíticas y la digitalización como claves del futuro en la Gestión Deportiva pública y privada
Authors: Gallardo Leonor , Garcia-Unanue Jorge
Published: April 2020

En este artículo se presentan los resultados de dos estudios de investigación sobre el desarrollo competencial y las tendencias en el ámbito de la Gestión Deportiva. En el primero de ellos se compara el nivel de implementación de las herramientas de gestión entre servicios deportivos públicos y privados. En el segundo se analiza las competencias actuales y futuras para la correcta gestión de servicios deportivos.
Datos masivos, algoritmización y nuevos medios frente a desinformación y fake news. Bots para minimizar el impacto en las organizaciones
Authors: Flores Vivar Jesús Miguel
Published: April 2020

Éste trabajo parte de una información compartida por muchos investigadores. La comprensión de la desinformación como un fenómeno que va mucho más allá del término “noticias falsas”. Estos términos han sido apropiados y usados engañosamente por poderosos actores para desestimar y poner en entredicho la cobertura informativa que ya atraviesa momentos críticos sobre la credibilidad.
La incomunicabilidad del misterio del sufrimiento
Authors: Calle Maldonado Carmen de la
Published: April 2020

El sufrimiento es testigo de la condición vulnerable del ser humano. Esta vulnerabilidad se desvela en la inconsistencia, finitud, limitación y radical dependencia humana de los otros, a los que necesita como ámbito de crecimiento personal y afectivo.
Analisa Performa Mesin Stirling Tipe Alpha Inovasi Desain Berbasis Biomassa
Authors: Satria Dhimas , Lusiani Rina , Listijorini Erni , Aswata Aswata , Hermawan Yogi
Published: April 2020

Energi fosil yang terbatas menuntut untuk mengembangkan teknologi yang menggunakan energi alternatif, salahsatu teknologi yang sesuai adalah mesin stirling karena merupakan teknologi pembakaran luar yang dapat memanfaatkan sumber kalor yang tersedia, termasuk di dalamnya adalah biomassa yang merupakan sumber energi yang melimpah dan mudah didapatkan. Penelitian ini merupakan inovasi desain dari penelitian terkait mesin stirling sebelumnya, yaitu dengan membuat sudut fasa menjadi 180o, dengan tujuan untuk mengurangi pengaruh gravitasi pada saat silinder dingin terkompresi, karena sudut fasa yang sekarang digunakan (90o) memiliki kekurangan yaitu silinder dinginnya yang tegak lurus ke atas, sehingga proses kompresinya melawan gravitasi.Tujuan dari penelitian adalah untuk mengetahui performa dari mesin stirling tipe alpa inovasi desain berbasis biomassa ini. Sedangkan metode yang digunakan menggunakan metode Schmidt yaitu salah satu metode perhitungan isothermal untuk mesin stirling. yang berdasarkan pada ekspansi isothermal dan kompresi dari gas ideal. Hasil penelitian menghasilkan efisiensi thermal dari mesin stirling adalah 51%. Kemudian pengaruh perbedaan temperatur panas dengan tempertur dingin yang menunjukkan bahwa semakin besar delta temperatur semakin besar pula kerja outputnya, dan pengaruh rasio volume yang menunjukkan semakin besar rasio volume semakin besar pula kerja outputnya.
NEGATIVE SKIN FRICTION EFFECT IN CONSTRUCTION AND SOME METHODS TO REDUCE NEGATIVE SKIN FRICTION EFFECT
Authors: Dau Ngo Van
Published: April 2020

Basing on the researches in negative skin friction effect, especially practical experiences of construction on soft soil at Cuu Long delta area, this article want to show the negative skin friction effect in soft soil and suggest some methods to reduce this affect.
GRAPH - BASED MODEL FOR TEXT REPRESENTATION
Authors: Nguyen Anh Hoang Tu , Nguyen Chi Tran Kim , Nguyen Phi Hong
Published: April 2020

Text representation models are very important pre-processing step in various domains such as text mining, information retrieval, natural language processing. In this paper we summarize graph-based text representation models. Graph-based model can capture structural information such as the location, order and proximity of term occurrence, which is discarded under the standard text vector representation models. We have tested this graph model in Vietnamese text classification system.
USING MAXIMUM FUNCTION IN DISCRIMINATION ANALYSIS
Authors: Vo Tai Van , To Dung Anh
Published: April 2020

Using maximum function of density functions we provide the new princeple which very advantage to discriminate a element for different situations. Finding maximum function and computing Bayes error are considered. The two programs are written to compute.
DIFFERENTIAL FORMULAS OF STOCHASTIC FUNCTIONS
Authors: Duong Dam Ton
Published: April 2020

Based on the quadratic variation theorem of the Brownian motion, we have established the basic rules of stochastic differetial calculus operations. Theorem 1. If X,Y, are positive-valued stochastic processes satisfying respectively the following stochastic differenntial equations Then a, b R: Where Theorem 2 Suppose is the Hermite type stochastic process of then
USING MICROWAVE-SOXHLET EXTRACTOR TO EXTRACT SOME NATURAL PRODUCTS
Authors: Pham Loc Thanh , Le Thach Ngoc
Published: April 2020

Domestic microwave oven was modified into Soxhlet-Microwave Extractor for extracting of natural products. The study of its extracted capacity was realized on: - caffein from Camellia sinensis L., - stevioside from Stevia rebaudiana (Bert.) Hemsl., - artermisinin from Artemisia annua L.; - rutine from Sophora japonica L.; - fruit oil from Illicium verum Hook. f.; - seed oil from Anethum graveolens L.. These extracted results were compared with the Soxhlet-conventional heating on the time, yield and quality.
COMPARISON OF DEGRADATION CAPACITY OF OXIDATION AND PHOTOOXIDATION OF SULFIDE CATALYZED BY Zn(II) TETRASULFOPHTHALOCYANINE VÀ Co(II) TETRASULFOPHTHALOCYANINE
Authors: Le Minh Thanh , Phan Thao Thanh , Pham Tung Cao Thanh , Phan Tan Minh
Published: April 2020

The oxidation and photooxidation of sulfide catalyzed by soluble phthalocynines were carried out. The results showed that both Zinc(II) Tetrasulfophthalocyanine (ZnTSPc) and Cobalt(II) Tetrasulfophthalocyanine (COTSPC) have catalytic activities in the oxidation of Sulfide. The degradation yiel minute under the light visible irradiation and in the dark were 96,61% and 71,11% respectively. Whereas, in case of CoTSPc during 40 minute, these were 98,10% and 96,30%, respectively. ZnTSPc demonstrates the photoactive property and catalyses the reaction via type II (singlet oxygen mechanism). COTSPc has not the photoactive property and catalyses the reaction via type I (electron transfer mechanism).
FABRICATION OF ANTIBACTERIAL WATER FILTER BY COATING SILVER NANOPARTICLES ON FLEXIBLE POLYURETHANE FOAMS
Authors: Nguyen Phong Thi Phuong , Ngo Thanh Vo Ke , Phan Phuong Hue
Published: April 2020

In this paper, we fabricated silver-coated polyurethane foams and used it as a bacterial filter for contaminated drinking water. Flexible PU foams were soaked in silver colloidal solutions for 10hrs, then washed and air-dried at room temperature. The prepared silver colloidal solutions and silver-coated PU materials were characterized by several techniques including TEM, FE-SEMEDS, UV-Vis, ICP-AAS, and Raman spectroscopy. The TEM images showed that the size of silver nanoparticles in colloidal solutions varies from 6 to 12nm, The Raman, FE-SEM/EDS and ICP-AAS data illustrated that silver nanoparticles were stable on the PU foam and were not washed away by water. Furthermore, the microbiological tests (tube tests and flow test) were carried out on silver-coated PU materials with the Coliforms, E. coli, and B. subtillis. The obtained results showed that the bacteria were killed completely with antibacterial efficiency of 100% being observed. Our research suggests that silver-coated polyurethane foams can be used as excellent good antibacterial water filters and would have several applications in other sectors.