bluuebunny/crossref_metadata_2025 huggingface dataset:
THE EFFECT OF INSTRUCTIONAL MODELS AND LEARNING STYLES TOWARDS WRITING SKILL
Authors: Nisa Baiatun
Published: February 2021

The objective of this experimental study is to find out the effect of instructional models and learning styles toward learnersâ€™ English writing skill. The research was conducted at the English Department, the Academy of Foreign Language BSI Jakarta Indonesia. The results of this research indicated that: (1) there is a significant different improvement of English writing skill between group of learners who were taught by using the STAD Cooperative Learning model and those who were taught by using The Lecture Model, (2) English writing skill of the visual learners taught by using STAD Cooperative Learning model is better than those taught by using The Lecture Model, (3) English writing skill of the auditory learners taught by using The Lecture Model is better than those taught by using STAD Cooperative learning model, and (4) there is an interaction effect between the instructional model and learning style towards English writing skill achievement.
Messages For Humanity In "Bula Malino" (Quiet Moon) (A Poem by Kaimuddin Idrus Muhammadalbuthuni Ibnu Badaruddin)
Authors: Sahlan Alan
Published: February 2021

The 2013 Curriculum describes the core competencies (KI) into four aspects of competence, namely (1) spiritual, (2) social, (3) cognitive, and (4) psychomotor aspects. The spiritual and the social aspects of learning materials development is done in an integrated manner, namely through the development of cognitive aspects (knowledge) of KI 3, and psychomotor aspects (skills) of KI 4. Therefore, the integration literature values in the areas of learning may be one of the teacher's choices. The objective is to make the learning materials comply with students' schemata or insight. Based on the content analysis that has been done in some local literatures both in folklores and poetries, local literature contains a lot of character values. Thus, local literatures may contribute to the implementation of 2013 Curriculum, so that teachers can integrate them in the development of learning. Local literatures in Southeast Sulawesi such as; Oheo Folklore for Tolaki people, Wandoke-Doke te Lakolo-kolopua Folklore for Muna People, or Wandiu-Diu Folklore for Buton people contains a lot of character values, both in terms of spiritual and social values. Folk Songs such as Kabanti, Kantola also has similar values in the society; they have humanistic, moral, mutual assistance, hard work, discipline, and struggle values. Spiritual values in the local literatures, among others are, belief in the greatness of Allah SWT, confidence in God's grace in all its activities, and surrender to Allah. Character values on learning in the implementation of the 2013 Curriculum, among others are; discipline, hard work, honesty, responsibility, working together, affection, and respect. Thus, the values of the local literature or local culture is highly relevant to the values of character education, and therefore local literature values can be integrated in the learning area designed by teachers in the implementation of 2013 Curriculum, especially in developing KI 1 and KI 2 in learning.
INTEGRATING 21ST CENTURY "COMMUNICATION & COLLABORATION" SKILLS INTO FRENCH LISTENING COMPREHENSION COURSE BY UTILIZING YOUTUBE CHANNEL
Authors: Ratna
Published: February 2021

The purpose of this study is to create a lesson plan as a supplement for Réception Orale I course that is integrated with 21st century skills and based on Youtube Channel. This design is created as an effort to employ the information technology in the course, which by far is deemed to be unable to merge the blended learning on its maximum effort. The importance of this Blended Learning-based research is conducted to improve students' listening skills in French Language Study Program (FLSP) through audio-visual learning media that is in line with technological developments, namely the Youtube Channel. Youtube Channel which will be used as a learning medium in listening comprehension course in FLSP is a special channel that is identified based on the suitability of the material in the Course Design (RPS) of the listening comprehension. The design of the Youtube Channel will set off by uploading videos that are relevant to the learning needs of listening skills so that learning objectives can be achieved. The result of this study is the supplement design for French listening comprehension course which is based on Youtube Channel. The finding of this paper may shed the light in paving our way to prepare ourselves to face Industrial Revolution 4.0, which characteristics among others is the use of information technology in the learning process.
MOTIVATION FOR LEARNING SPEAKING SKILLS USING VIDEO BLOG (VLOGGING) BASED ON PROJECT LEARNING STUDENTS OF THE INDONESIAN LANGUAGE AND LITERATURE EDUCATION DEPARTMENT AT NUSA CENDANA UNIVERSITY: A PHENOMENOLOGY APPROACH
Authors: Niron Yakobus M. Langkelang
Published: February 2021

This study aims to identified students motivation in learning project-based learning (PBL) Indonesian language skills using vlogging media based on meanings and themes seen from the "because motives" and "in order to motives" related to the phenomenon of learning in the classroom. In identifying objectives, this study uses a qualitative research method with the approach of phenomenology from Albert Schutz's perspective. Researcher becomes the main instrument in an effort to obtain and find data. The research subjects were 38 second semester students of the Department of Language and Literature at Nusa Cendana University. Data collection techniques used include observation, questionnaires, and interviews. Data analysis through three stages of the flow model namely reduction, presentation and verification of data and triangulation. The results of the study prove that the teaching strategy associated with vlogs can attract students' learning interest because of their interest in other fields such as multimedia technology and social media. The application of learning PBL-based speaking skills using vlogs can improve speaking competence and gradually improve the mental aspects of students to become more confident to speak and communicate in public. So it can be said that learning PBL-based speaking skills using vlogs is a good and innovative learning strategy in an effort to increase learning motivation and mastery of students' speaking skills.
PENGATURAN KECEPATAN MOTOR DC SERI BERBASIS ARDUINO UNO
Authors: Diarsyah Amarullah  , Mochammad Djaohar  , Massus Subekti
Published: February 2021

Abstract

The purpose of this research is to design of the speed regulation of an arduino uno based seri DC motor using a DC-DC converter (Boost Converter). This research uses research and development method. The research subjects used are seri DC motor. Data analysis technique used is descriptive analysis with data collection technique that is laboratory observation using test instrument. The conclusion of this research is using a DC-DC converter or boost converter can move seri DC motor loads inertia to which has a maximum voltage of 24 V from the start supply to the boost converter which is 12 V so that the voltage increases twice. Other than that in terms of setting the DC motor speed is influenced by the amount of duty cycle controlled via by arduino uno microcontroller.

ABSTRAK

Tujuan penelitian ini adalah untuk membuat rancang bangun pengaturan kecepatan motor DC seri berbasis arduino uno dengan menggunakan DC-DC converter (Boost Converter).

Penelitian ini menggunakan metode riset dan pengembangan. Subyek penelitian yang digunakan yaitu motor DC seri. Teknik analisis data yang digunakan yaitu analisis deskriptif dengan teknik pengumpulan data yaitu observasi laboratorium menggunakan instrumen pengujian.

Kesimpulan dari penelitian ini adalah dengan menggunakan DC-DC converter atau boost converter bisa menggerakan beban inersia pada motor DC seri yang memiliki tegangan maximal 24 V, dari supply awal ke boost converter yaitu 12 V sehingga tegangan meningkat dua kali. Selain itu dalam hal pengaturan kecepatan motor DC dipengaruhi besaran duty cycle yang dikontrol melalui mikrokontroler arduino uno.
Pengaruh Curah Hujan dan Debit Air Terhadap Produktivitas Energi Listrik yang Dihasilkan Pada Pembangkit Listrik Tenaga Air (Studi Kasus: Sub Unit PLTA Kracak, Kabupaten Bogor Jawa Barat)
Authors: Gunawan Wildan , Muslim Suyitno , Arif Rahardjo Imam
Published: February 2021

This research is aimed to understand the effects of  rain fall and discharge rate towards hydro electric power plant productivity (case study at Kracak Sub Unit HPP, Bogor Regency Jawa Barat). Multiple regression tecnique analysis is used as research method with quantitative approach for describing the effects of rain fall and discharge rate towards hydro electric energy productivity. Based on Sub Unit PLTA Kracak during a highest down pour in June 2018 has gained electrical power about 173,583 kWh for 15,84 mm rain fall and the lowest rain fall in July 2018 is 0,86 mm only obtain 49,772 kWh electrical power with the average rain fall record in three stations is 8,9592 mm. Mean while, for the highest river discharge rate happened in February is 10,08 m3/detik which produce 198,296 kWh electrical power and the lowest in June that only gained 3,53 m3/detik which produce 49,772 kWh electrical power with the average of river discharge rate in 2018 is only 7,9858 m3/detik. The average of electrical power it self is only 156,0105 kWh for 8,9592 mm of rainfall and 7,9858 m3/detik river discharge rate record in 2018. The conclusion oh this research is the discharge rate in headwaters area is affected by rainfall intensity, but not necessarily affected to hydro electric energy productivity.

 

ABSTRAK

Tujuan dari penelitian ini adalah untuk mengetahui pengaruh curah hujan dan debit air terhadap produktivitas energi listrik yang dihasilkan pada pembangkit listrik tenaga air (Studi Kasus: Sub Unit PLTA Kracak, Kabupaten Bogor Jawa Barat). Metode yang digunakan dalam penelitian ini adalah metode deskriptif dengan pendekatan kuantitatif teknik analisis data regresi berganda untuk mendiskripsikan data penelitian curah hujan dan debit air terhadap produktivitas energi listrik yang dihasilkan. Berdasarkan data hasil penelitian yang diperoleh di Sub Unit PLTA Kracak data curah hujan tertinggi pada tahun 2018 di Bulan Juni sebesar 15,84 mm dapat menghasilkan energi listrik sebesar 173,593 kWh dan terendah di Bulan Juli sebesar 0,86 mm dapat menghasilkan energi listrik sebesar  49,772 kWh dengan rata-rata pertahun 2018 yaitu sebesar 8,9592 mm di tiga stasiun. Sedangkan data debit air pada tahun 2018 tertinggi di Bulan Februari sebesar 10,08 m3/detik dapat menghasilkan energi listrik sebesar 198,296 kWh dan terendah di Bulan Juli sebesar 3,53 m3/detik dapat menghasilkan energi listrik sebesar 49,772 dengan rata-rata pertahun 2018 debit air sebesar 7,9858 m3/detik. Dengan rata-rata curah hujan 8,9592 mm dan debit air 7,9858 m3/detik dapat menghasilkan energi listrik rata-rata pertahun 2018 sebesar 156,0105 kWh selama tahun 2018. Dapat disimpulkan curah hujan tidak berpengaruh langsung terhadap produktivitas energi listrik yang dihasilkan sedangkan debit air berpengaruh terhadap produktivitas energi listrik.
SIFAT FISIK DAN MEKANIK BAMBU LAPIS DENGAN KULIT DAN TANPA KULIT TERHADAP SNI 01â€“5008.7â€“1999 (Studi Kasus: Bambu Hitam)
Authors: Supriyanti Yunita , Bachtiar Gina , Nasution Nira
Published: February 2021

Tujuan penelitian ini adalah untuk mengetahui sifat fisik dan mekanikbambu lapis berbahan dasar bambu hitam dengan kulit maupun tanpakulit, untuk selanjutnya digunakan sebagai pembanding adalah SNI01â€“5008.7â€“1999 (kayu lapis struktural). Sifat fisik dan mekanik yangdiujikan meliputi kadar air, keteguhan lentur, modulus elastisitas, danketeguhan rekat.Hasil penelitian menunjukkan bahwa kadar air, keteguhan lenturmaupun modulus elastisitas sejajar serat, dan keteguhan rekat bambulapis berbahan dasar bambu hitam tanpa kulit memenuhi SNI 01â€“5008.7â€“1999, namun tidak demikian untuk keteguhan lentur maupunmodulus elastisitas tegak lurus serat. Sedangkan untuk bambu lapisberbahan dasar bambu hitam dengan kulit diperoleh kesimpulan bahwaketeguhan lentur sejajar serat, modulus elastisitas sejajar dan tegaklurus serat memenuhi SNI 01â€“5008.7â€“1999, namun tidak demikianuntuk kadar air, keteguhan lentur tegak lurus serat dan keteguhanrekat. Berdasarkan hasil penelitian juga diperoleh kesimpulan bahwaketeguhan lentur bambu lapis dengan kulit lebih rendah daripadaketeguhan lentur bambu lapis tanpa kulit untuk arah sejajar serat,sedangkan untuk arah tegak lurus serat, keteguhan lentur bambu lapisdengan kulit lebih tinggi daripada keteguhan lentur bambu lapis tanpakulit.
STUDI PENGELOLAAN AIR BERSIH DI KAWASAN INDUSTRI JABABEKA KABUPATEN BEKASI
Authors: Arnandi Faeruzy , Rahmayanti Henita , Bachtiar Gina
Published: February 2021

Penelitian ini bertujuan untuk mengetahui bagaimana pengelolaan airbersih yang ideal untuk memenuhi kepuasan pelanggan (industri danperumahan) dikawasan industri Jababeka. Penelitian ini dilakukan diKawasan Industri Jababeka pada WTP I dan WTP II mulai dari bulanMei sampai dengan bulan Juli 2011.Dalam penelitian ini menggunakan Metode Deskriptif Kualitatif,dengan populasi adalah seluruh pelanggan air bersih (industri danperumahan) di Kawasan Industri Jababeka. Sedangkan jumlah sampeladalah 10 pelanggan industri dan 33 pelanggan perumahan denganteknik pengambilan sampel menggunakan simple randomsampling.Instrument yang digunakan adalah kuisioner, wawancara danobservasi untuk menjaring data mengenai kualitas dan kuantitas airbersih di WTP dan pendapat pelanggan mengenai air bersih diKawasan Industri Jababeka. Parameter pokok yang diukur adalahtingkat pH dan Kekeruhan/turbidity yang terdapat di tempatpengolahan dan pipa distribusi di WTP.Hasil penelitian didapat bahwa terdapat kekurangan jikadibandingkan dengan standar kualitas air bersih yang telah ditetapkandi Kawasan Industri Jababeka dengan kenyataan yang sebenarnya.Namun, untuk pemenuhan air bersih kawasan pelanggan industri,berdasarkan presentase menunjukkan bahwa kualitas air masih belummemenuhi kebutuhan dan kepuasaan pelanggan. Sementara dari segikuantitas, pemenuhan air bersih untuk kawasan pelanggan perumahanmasih belum memenuhi kepuasaan pelanggan, debit air yangdihasilkan masih harus ditingkatkan. Namun, untuk pemenuhankuantitas air bersih di kawasan industri sudah memenuhi kepuasaanpelanggan. Setelah dilakukan identifikasi tempat pengelolaan, hasilperbandingan frekuensi menunjukkan, untuk instalasi pengolahan airtidak terjadi penurunan kualitas (kekeruhan dan peningkatan pH) dankuantitas (volume dan debit air). Penurunan terjadi pada bagian pipadistibusi, baik kualitas dan kuantitas. Untuk meminimalisir penurunantersebut, perlu dilakukan pengawasan yang ketat pada saat melakukanflushing.
PENYELENGGARAAN SERTIFIKASI TENAGA AHLI JASA KONSTRUKSI DI INDONESIA TAHUN 2000-2012
Authors: Widiasanti Irika
Published: February 2021

Industri konstruksi merupakan industri yang mempunyai karakter yang,unik, banyak pihak yang terlibat dengan berbagai fungsi yang berbeda(Penyedia jasa konsultan, Penyedia jasa konstruksi, Suplier danOwner). Bunga rampai ini berisi hasil-hasil penelitian terkait denganpenelitian tentangpenyelenggaraan sertifikasi tenaga ahli dalam kurunwaktu 2005 â€“ 2012.
STUDI KUAT TEKAN BETON YANG MENGALAMI PENUNDAAN PENUANGAN DENGAN PENAMBAHAN BAHAN TAMBAH RETARDER
Authors: Putra Ferdian Zudis , ST Prihantono , Murtinugraha Eka
Published: February 2021

Penelitian ini bertujuan untuk mengetahui perubahan kekuatan tekan betonmenuangkan tertunda selama 2,5 jam untuk mendapatkan dosis optimal yang ditambahkan dalambeton yang merupakan penambahan Retarder POZZOLITH 425 R ditambahkan dengan 5 dosisvariasi yaitu 0%, 0,2%, 0,4%, 0,6% dan 0,8% untuk desain campuran beton fâ€™cNilai 35 MPa dan kemerosotan 75 Â± 20 mm.Penelitian ini diadakan di PT. Adhimix Precast Indonesia Plant Kebon Jeruk BaratJakarta di Material Testing Laboratory pada bulan September Sampai November 2012 denganmetode eksperimental sesuai dengan Standar Nasional Indonesia (SNI) danAmerican Society for Testing and Materials (ASTM). Penelitian ini menggunakandesain campuran beton untuk 35 MPa dan nilai Slump 75 Â± 20 mm, yang banyak darisampel silinder adalah 50.Hasil dari penelitian menunjukkan bahwa penambahan Retarder yang optimalPOZZOLITH 425 R menambahkan dosis penuangan beton yang tertunda selama 2,5 jam dengandesain mixes fâ€™c 35 MPa adalah 0,6% dari berat semen dengan kompresifnilai kekuatan 46,31 MPa dan nilai kemerosotan adalah 13 cm. persentase maksimumpeningkatan kuat tekan terjadi pada penambahan Retarder POZZOLITH425 R adalah 14,64%. Untuk penambahan Retarder POZZOLITH 425 R 0,2%, 0,4%, dan0,8% perubahan persentase kuat tekan adalah 5,12%; 9,06%; dan -2,66%dari beton yang tidak ditambahkan retarder.
PEMANFAATAN LIMBAH PADAT IPAL INDUSTRI TEKSTIL SEBAGAI PENGGANTI SEBAGIAN AGREGAT HALUS PADA BETON
Authors: Wiyono Iristyaningrum , Musalamah Sittati , MT Anisah
Published: February 2021

Penelitian ini bertujuan untuk mengetahui kegunaan dari limbah padat IPAL indutri tektil pada kuat tekan beton pada benda uji kubus dalam upaya untukmendapatkan proporsi maksimum pada beton dengan menggunakan 4 perlakuan yaitu, 0%, 20%, 40% dan 60% dari jumlah berat agregat halus untuk rancangan beton fâ€™c 25 Mpa dengan slump 120Â±20 mm.Penelitian ini dilaksanakan di Laboraturium Kimia Universitas Indonesia dan Laboraturium Uji Bahan Universitas Negeri Jakarta pada bulan Desember 2012hingga Januari 2013 dengan metode eksperimen. Penelitian ini menggunakan beton dengan rancangan fâ€™c 25 Mpa dengan slump 120Â±20 mm, dengan jumlahsampel 40 benda uji berbentuk kubus. Hasil penelitian ini menunjukan bahwa terdapat perbedaan pada penggunaan limbah padat IPAL industri tekstil dengan kuat tekan beton. Rata-rata kuat tekan tertinggi terdapat pada kandungan limbah 60% dari berat agregat halus yaitu18,99 Mpa, tegangan karakteristik tertinggi didapat oleh beon dengan kandungan limbah 40%, sedangkan nilai slump yang memenuhi nilai slump rencana adalah pada beton dengan kandungan limbah 20% dari berat agregat halus yaitu 100 mm.
50 MEKANISME SERTIFIKASI TENAGA AHLI JASA KONSTRUKSI MENURUT UNDANG-UNDANG NOMOR 11 TAHUN 2014 TENTANG KEINSINYURAN
Authors: Widiasanti Irika
Published: February 2021

Undang-undang nomor 11 tahun 2014 tentang Keinsinyuran disahkan 25 Pebruari 2014 bertujuan untuk mencegah kesalahan dan kelalaian praktek keinsinyuran yang dapat merugikan masyarakat, mengatasi pekerjaan teknologi dan ahli teknologi, mengamankan investasi, dan anggaran pembangunan,mengembangkan keinsinyuran dan teknologi serta penyetaraan kualifikasi dan kompetensi insinyur Indonesia dengan insinyur dari negara lain. Sehinnganantinya mampu memajukan profesi keinsinyuran agar menjadi ujung tombak pembangunan dan daya saing global untuk kemajuan dan kesejahteraan bangsa Indonesia. Kesiapan lulusan teknik untuk bersaing di pasar harus dibarengi dengan aturan hukum dan perundangan yang mengaturnya. Selain itu, UU Keinsinyuran juga mengatur tentang sertifikasi insinyur professional, penyelenggaraan lisensi kerja hingga standar pelayanan. Hal-hal yangmendorong penyelenggaraan sertifikasi tenaga kerja konstruksi antara lain adalah segmentasi pasar kerja bergeser dari pendekatan wilayah ke pendekatan profesi dan kompetensi , Sumber Daya Manusia kompetensi tinggi untuk memenangkan persaingan, sertifikat menjadi bukti pengakuan kualifikasi tertulis.Studi ini bertujuan untuk mengetahui mekanisme sertifikasi tenaga ahli jasa konstruksi sebagai salah satu bidang keinsinyuran yang diatur pada UUKeinsinyuran ini. Pembahasan ditinjau terhadap lembaga penyelenggara dan proses penyelenggaraan.Pelaksanaan studi mengacu pada metodologi yang meliputi kegiatan utama Studi literatur, pengumpulan data primer dan sekunder, analisis data, perumusankesimpulan dan rekomendasi. Analisis dilakukan didasarkan pada informasi yang diperolah dari berbagai sumber, baik informasi sekunder, informasi primer yang dilengkapi dengan pendapat para pakar dan praktisi.Hasil dari studi ini, diharapkan dapat memperkuat konsep sertifikasi tenaga ahli sesuai dengan prinsip sistem nilai dan base practice internasional
Perioperative Corticosteroids Reduce Dysphagia Severity Following Anterior Cervical Spinal Fusion
Authors: Garcia Stefan , Schaffer Nathaniel E. , Wallace Nicholas , Butt Bilal B. , Gagnier Joel , Aleem Ilyas S.
Published: February 2021

Background:

The anterior approach to the cervical spine is commonly used to treat cervical pathology. It is, however, associated with high rates of dysphagia, which may be associated with substantial patient morbidity. Perioperative corticosteroid administration has been advocated to decrease dysphagia rates; its efficacy, however, remains uncertain. We conducted a meta-analysis of randomized trials to determine the efficacy of perioperative corticosteroid administration in reducing postoperative dysphagia as well as any adverse effects, such as pseudarthrosis and infection.

Methods:

We conducted a systematic search of electronic databases (MEDLINE, Embase, CENTRAL [Cochrane Central Register of Controlled Trials], ClinicalTrials.gov) to identify randomized controlled trials (RCTs) that evaluated corticosteroids versus any comparator for prevention of postoperative dysphagia after anterior cervical spine procedures. Two independent reviewers used the GRADE (Grades of Recommendation Assessment, Development and Evaluation) criteria to assess eligibility and risk of bias, perform data extraction, and rate the quality of evidence. The primary outcome was severity of postoperative dysphagia. We conducted meta-analyses of dysphagia (both overall and by delivery method), pseudarthrosis, and postoperative infection.

Results:

After screening of 927 articles, a total of 7 studies were eligible for final inclusion. These included 431 patients, of whom 247 received corticosteroids and 184 received placebo or a control treatment. Moderate-quality evidence demonstrated a significant improvement in postoperative dysphagia rates (odds ratio, 0.35; 95% confidence interval, 0.20 to 0.63; p < 0.001), and this finding was robust to both permutation analyses and sensitivity analyses removing the studies with a high risk of bias. There was no significant difference between intravenous and local steroid administration (p = 0.16). There were no documented infections. There was no significantly increased risk of pseudarthrosis in those receiving steroids compared with placebo or a control treatment (p = 0.13).

Conclusions:

This meta-analysis found moderate-quality evidence supporting the use of perioperative corticosteroid administration as an adjunct to anterior cervical spinal procedures. Patients treated with corticosteroids intravenously or locally had significantly decreased severity of dysphagia.

Level of Evidence:

Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.
All-Suture Anchor Dynamic Anterior Stabilization Produced Successful Healing of the Biceps Tendon
Authors: de Campos Azevedo Clara , Ângelo Ana Catarina
Published: February 2021

Cases:

Three patients (age, 15-34 years) who had a history of chronic traumatic anteroinferior glenohumeral instability (2-10 dislocations) and preoperatively documented Bankart and Hill-Sachs lesions underwent all-arthroscopic trans-subscapular transposition of the long head of the biceps that was fixed on the anteroinferior glenoid using a novel double double-pulley all-suture anchor method that has not been reported previously.

Conclusion:

Excellent 12-month clinical and imaging outcomes, with substantial improvements in the Western Ontario Shoulder Index and the Rowe score in the first consecutive patients who underwent this original technical variant of dynamic anterior stabilization and the surgical pearls and pitfalls are described in detail.
Retroperitoneal Approach for Excision of Wear-Debris Pseudotumor
Authors: Bellamkonda Kirthi S. , Tonnessen Britt H. , Molho David A. , Lindskog Dieter , Wiznia Daniel
Published: February 2021

Case:

Pelvic pseudotumors may occur as a reaction to wear-debris after hip arthroplasty and are rarely treated with surgery. We describe an instance in which a pelvic pseudotumor along the iliopsoas muscle tendon sheath was debulked using a retroperitoneal approach in a patient presenting for treatment of a prosthetic hip infection. The patient recovered uneventfully and was ambulatory with a new hip prosthesis at 3 months after procedure.

Conclusions:

Retroperitoneal exposure provided safe, excellent exposure to a wear-debris pelvic pseudotumor in this case.
Adolescent Athlete Stress Fractures Associated with Vitamin D Insufficiency
Authors: Haase Douglas R. , Brown Kevin , Templeton Kimberly J.
Published: February 2021

Case:

The authors present 3 adolescent athletes who presented with stress fractures in their lower extremities, initially diagnosed as tumors. All 3 patients received an inconclusive magnetic resonance imaging before referral; fractures were confirmed on radiographs and computed tomography. All were found to have vitamin D insufficiency.

Conclusions:

Vitamin D insufficiency is a global epidemic mainly focused on adults and young-adult athletes. These case reports raise concerns about a growing prevalence of vitamin D insufficiency in adolescents, the potential risk of stress fracture, and the need for screening and possible supplementation in adolescent athletes to improve their bone health.
Posterior Circulation Stroke due to Atlantoaxial Instability in CHST3-Related Skeletal Dysplasia
Authors: Dhawale Arjun , Bajaj Shruti , Chaudhary Kshitij , Agarwal Tushar , Garg Sandeep , Choudhury Himanshu
Published: February 2021

Case:

An eight-year-old boy presented with acute encephalopathy due to posterior circulation ischemic stroke. He was found to have vertebral artery stenosis secondary to atlantoaxial instability (AAI) due to an os odontoideum. Occipitocervical fusion was performed 4 weeks after stroke. The child improved neurologically and regained independent ambulation. He had indications of an underlying spondyloepiphyseal dysplasia with joint luxation and whole-exome sequencing diagnosed CHST3-related skeletal dysplasia.

Conclusion:

As far as we know, this AAI due to an os odontoideum is a previously unreported complication of CHST3-related skeletal dysplasia. Occipitocervical fusion yielded good clinical results with the 1-year follow-up.
Displaced Femoral Neck Fracture in a Child Mimicking the Retinacular Flap Technique for Capital Realignment
Authors: Venkatadass K. , Saikrishna K. , Rajasekaran S
Published: February 2021

Case:

Pediatric femoral neck fractures are rare injuries usually associated with high-energy trauma. We present a grossly displaced femoral neck fracture in a 7-year-old girl due to a high violence road traffic accident, in which the femoral neck had buttonholed medially into the adductors. The management and clinical and radiological outcomes are discussed with relevant literature.

Conclusion:

This case is reported for its atypical presentation, in which the metaphysis of the proximal femur completely separated from the capital epiphysis and the greater trochanteric apophysis leaving the posterior periosteal flap intact mimicking the retinacular flap technique for capital realignment procedure.
Difference in Resident Versus Attending Perspective of Competency and Autonomy During Arthroscopic Rotator Cuff Repairs
Authors: Foster Michael J. , O'Hara Nathan N. , Weir Tristan B. , Aneizi Ali , Henn R. Frank , Packer Jonathan D. , Hasan S. Ashfaq , Slobogean Gerard P. , Gilotra Mohit N.
Published: February 2021

Background:

A noted deficiency in orthopaedic resident education is a lack of intraoperative autonomy; however, no studies exist evaluating this issue. The purpose of this study was to determine whether there is a difference between resident and attending perception of resident competency and autonomy during arthroscopic rotator cuff repairs and whether increased perceived competency leads to more autonomy.

Methods:

This study included 21 orthopaedic residents and 7 attendings from a single residency program. A survey was developed that included the previously validated Ottawa Surgical Competency Operating Room Evaluation (O-SCORE) and implemented novel arthroscopic rotator cuff repair questions concerning 5 key procedural steps determined by attendings. The survey assessed resident and attending perception of percent opportunity given and percent completed of each step and whether the resident could complete the surgery independently. Paired comparisons were conducted using the Wilcoxon signed-rank test. Agreement between residents and attendings was calculated using a linear-weighted Gwet's AC2. A secondary analysis investigated resident perception of autonomy stratified by attending perception of competency using Kruskal-Wallis tests.

Results:

One hundred forty-two surveys were completed over one academic year. Residents reported a 4-point higher median O-SCORE (34) than attendings (30; p < 0.01; agreement = 0.63). Residents perceived less opportunity compared with attendings, with a median opportunity to complete each step of 54% vs. 70% (p < 0.01; agreement = 0.39). Residents also perceived lower percent completed of the key steps compared with attendings, with medians of 52% vs. 61% (p < 0.01; agreement = 0.37). Resident perceived opportunity increased with higher attending reported O-SCOREs (p < 0.01) and percent completion of the key steps (p < 0.01). No statistically significant increase in perceived opportunity was observed the with post-graduate year (PGY) level (p = 0.35).

Discussion:

This study demonstrated a significant difference in perception between residents and attendings regarding resident competency and autonomy during arthroscopic rotator cuff repairs. It also demonstrated that with increasing attending perception of competency, there was an increasing resident perception of autonomy, but there was no statistically significant difference of perceived autonomy based on the PGY-level.
Restoration of External Rotation Following a Lateral Approach for Glenoid Bony Increased-Offset Reverse Shoulder Arthroplasty
Authors: Imai Shinji
Published: February 2021

Background:

Reverse shoulder arthroplasty (RSA) is a recognized therapeutic modality for a massive rotator cuff tear. Some authors recommend lateralization of the center of rotation by bony increased offset (BIO) of the glenoid for improvement of external rotation, while others refute its effects. RSA through the conventional deltopectoral approach sacrifices the subscapularis tendon during the approach. We hypothesized that a lateral approach (LA) for RSA, with less soft-tissue resection, would restore external rotation by allowing retensioning of the remaining rotator cuff with use of a BIO graft.

Methods:

We retrospectively investigated 36 nonlateralized inlay RSAs performed through a lateral approach (LA non-BIO group) and 40 inlay RSAs performed through a lateral approach with BIO (LA BIO group) for a massive rotator cuff tear. There were 5 patients with a combined loss of active elevation and external rotation (CLEER) in the LA non-BIO group and 6 in the LA BIO group. The Constant score, the UCLA (University of California Los Angeles) score, and range of motion, in particular, external rotation with the arm at 0° (ER0) and at 90° of abduction (ER90), were compared.

Results:

The mean ER90 in the LA BIO group improved significantly, from 45.8° ± 21.6° to 65.9° ± 15.8° (p = 0.012). Postoperative ER90 in the LA BIO group was significantly higher than in the LA non-BIO group (mean, 65.9° ± 15.8° compared with 53.0° ± 12.3°; p = 0.026). The mean ER0 for the patients with CLEER status significantly improved in the LA BIO group, from −15.8° ± 9.8° to 11.0° ± 15.6° (p = 0.0072). The mean postoperative anterior elevation, UCLA score, and Constant score in the LA BIO group and the LA non-BIO group improved significantly, but there was no difference between the 2 groups (anterior elevation: 131.5° ± 17.6° compared with 121.5° ± 14.1°, p = 0.07; UCLA: 25.5 ± 6.4 compared with 23.4 ± 5.4, p = 0.2; Constant: 74.3 ± 12.0 compared with 73.6 ± 10.1, p = 0.43).

Conclusions:

LA BIO-RSA was associated with a significant improvement in range of motion, particularly external rotation. Improvements in anterior elevation, the Constant score, and the UCLA score were not significantly different from those noted for LA non-BIO-RSA.

Level of Evidence:

Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.
Biomedical Ethics in Performing Arts Medicine Research
Authors: Manchester Ralph A
Published: February 2021

As the field of performing arts medicine continues to advance, it is essential that we maintain the trust that has been built over the last quarter century with the dancers, musicians, and other performing artists we serve. Trust is a precious commodity that is built over time, largely
between individual health care professionals and the patients for whom they care. However, other things we do (or don't do) can have a major influence on the trust and confidence that others place in us. One of these is research and the way we conduct research, especially when it involves
human subjects. The public's confidence in medical researchers has been shaken in the last few years as the result of a few well-publicized “bad outcomes” in clinical studies being done at leading academic medical centers in the U.S. and elsewhere. While we are unlikely to do gene-transfer
or new drug development studies in an effort to address the health problems of musicians and dancers, we should still hold ourselves to the same ethical standards that apply to the rest of the healthcare world.
Lifetime Prevalence of Upper-body Musculoskeletal Problems in a Professional-level Symphony Orchestra: Age, Gender, and Instrument-specific Results
Authors: Abréu-Ramos Antonio M , Micheo William F
Published: February 2021

Instrumentalists are at risk to develop upper-body musculoskeletal problems (MSKPs). Identified risk factors include age, gender, instrument played, joint laxity, and poor technique or posture. In this study, we established the prevalence of MSKPs that affect the ability to play an
instrument in the population of a professional-level symphonic orchestra and the relation of these problems to gender, age, and instrument. The members of the Puerto Rico Symphony Orchestra were recruited voluntarily. A questionnaire was used to obtain information on demographics, instrument
played, and history of MSKP severe enough to affect their playing ability. Questions also covered alleviating and aggravating factors, upper-body areas involved, type of symptoms, and type of treatment sought. After the questionnaire was completed, all players underwent a neuromusculoskeletal
upper-body examination. Of the 75 musicians participating, 81.3% reported having had an MSKP that affected their ability to play. Of these, 83.6% reported their MSKP was directly associated to playing. Females were more commonly affected, 87.5% vs. 79.7% for males. Lower-body strings (cello,
bass) players and percussionists (93.3% and 100%, respectively) and younger (22-29 yrs) and older (50-61 yrs) populations (83.3% and 90.9%, respectively) reported more MSKPs. These age groups played more hours per week (28.7 and 32.0 hrs, respectively). In all groups, low back pain was the
most common complaint, present in 75.4% of those with MSKPs. Upper-body strings (violin, viola) players also reported neck and left shoulder problems. Contributing factors include hours of exposure and technical expertise. Female gender, age, and instrument played were found to be risk factors
for developing MSKPs in this population.
Posteruptive Thermal History of the Proterozoic Basaltic North Shore Volcanic Group of the Midcontinent Rift: Evidence from K/Ar Data of Celadonite
Authors: Schmidt Susanne Theodora , Süssenberger Annette , Wemmer Klaus
Published: February 2021

This study reports three K/Ar ages on celadonite, a dioctahedral K-Fe mica, in the Proterozoic North Shore Volcanic Group (NSVG) of the Midcontinent Rift in northeastern Minnesota. Celadonite formed during beginning posteruptive, low-temperature conditions at temperatures<100°C and with input of meteoric water. K/Ar ages between 1062±16 Ma and 955.0±12 Ma document a remarkably long posteruptive thermal history of >100 myrs in a thick continental basaltic sequence. In the stratigraphically lower part of the NSVG, celadonite formation occurred at 1062±16 Ma in an amygdule or a vesicle filled with celadonite, while another celadonite amygdule in a stratigraphically higher flow was dated at 1039.4±14 Ma. Both flows are overprinted by a later multistage lower zeolite-phyllosilicate facies assemblage (laumontite-albite-corrensite±chlorite±smectite±prehnite±pumpellyite). In the stratigraphically higher part of the sequence, celadonite crystallization at an amygdule rim is followed by upper zeolite facies conditions (stilbite-heulandite-smectite assemblage) and was dated at 955.0±12.4 Ma. The constrained time frame of 107 myrs indicates a long-lived, probably not continuous and locally occurring, posteruptive thermal alteration process. The data suggest that alteration was depth-controlled and temporally and spatially inhomogeneous and implies the progression of the sequence from a close-to-the-surface alteration mode with input of meteoric water to a burial metamorphic mode and with locally occurring hydrothermal activity due to continuous magmatic activity. Volcanism in the Midcontinent Rift system is supposed to have lasted between 1109 Ma and 1083 Ma based on U/Pb zircon ages. The first crystallization of celadonite is recorded in the lower part of the NSVG and occurred ca. 30 myrs after the emplacement of the Silver Bay aplite intrusion in the upper part of the NSVG. Burial rates are determined to be 0.04 km·Ma-1and 0.10 km·Ma-1. The hydrothermal alteration under low-temperature burial conditions clearly postdates the rift-related alkaline and tholeiitic magmatism of the Midcontinent Rift and overlaps with the depositional window of the sedimentary rocks that overlie the Midcontinent Rift volcanics, as well as crustal-scale fault systems that were active during Grenvillian tectonic uplift after the cessation of magmatic activity.
Sistem Optimasi Penjadwalan Mesin Produksi Menggunakan Metode GUPTA Berbasis Android
Authors: Mashuri Chamdan , Mujianto Ahmad Heru , Sucipto Hadi , Arsam Rinaldo Yudianto
Published: February 2021

Research has been carried out by developing an optimization information system for scheduling production machines by applying the Android-based GUPTA method. This android-based application is able to optimize production time, because in the android application it implements the GUPTA algorithm which uses the calculation of the comparative processing time on every machine in the company by prioritizing the smallest processing time for scheduling which aims to optimize production scheduling time, by paying attention to the value of makespan to produce product size 12 griddle, size 14 griddle, 16 size griddle, 18 size griddle and 20 size griddle so that an optimal makespan value is obtained. The GUPTA method can be used in problems with more than two machines, because this method combines the time of each process on the first and subsequent machines to find the minimum value and can only be used in pure flow shop scheduling. The advantage of this method is that it determines scheduling only on one machine group. This research resulted in an Android-based application that can schedule products to be produced by machines automatically. From the results of testing with a total of 12 pieces of production in each product with a total of 5 different sizes, the minimum value of makespan is obtained, namely 2054569 minutes with the sequence of product processing with work order 12 griddle, griddle 18, griddle 20, griddle 16, and griddle 14 The accuracy of the application test results shows 98.87% for the first time and 98.84% for the second time when compared with manual calculations.
Implementasi Augmented Reality Furniture Dengan User-Defined Target Berbasis Android
Authors: Junaidi Akmal , Prabowo Rizky , Syarif Admi , Fazri Yudistira
Published: February 2021

Furniture catalogs display items statically in 2-dimensional form only. Buyers often want to observe furniture in a real room. Home-View application in this study can display 3D furniture objects as they want. Home-View App has been developed with Augmented Reality technology. Application is developed using the Vuforia SDK library and User Defined Target (UDT) method in the Unity3D software. UDT is utilized to display 3D furniture on a target like magazine and book covers. Home-View application has two menus namely Marker Katalog and HomeView. Marker Katalog serves as a method to view 3D furniture in a small form in the furniture catalog. HomeView serves as a way to view 3D furniture in the desired room. This application has a positioning feature on the x and y axis and rotating feature on the z axis. The application can run by displaying 3D furniture to its actual size at the HomeView menu and successfully displaying 3D furniture as listed on the catalog at the Marker Katalog menu.
Moderating Effects of Academic Position and Computer Literacy Skills on E-learning Portal Usage: SEM Application on Theory of Planned Behaviour
Authors:   Science Library, South Eastern University of Sri Lanka,, Mashroofa Mohamed Majeed , Haleem Athambawa , Jahufer Aboobucker
Published: February 2021

The main objective of this research is to investigate the moderating effect of academic position and computer literacy level on usage of the online learning portal among academics by examining the factors from the perspective of the Theory of Planned Behaviour as the basis for conceptual model. Academic position and Computer Literacy skills are used as moderators. The population of the study comprised 5399 academics. Systematic proportionate sampling techniques applied to gather data, with 400-sample size. Data were received from only 320 university academics, giving a response rate of 80%. SPSS and AMOS version 23 were instrumented to analyse the data and Structural equation modelling was used to find the model fit and causal relationships. This study reveals that both attitude and subjective norm have influences on the behavioural intention but not the perceived behavioural control. Behavioural intention and perceived behavioural control had a direct association with Portal Usage. Both gender and academic position moderate the association of exogenous and endogenous variables. This study will help to set up new work norms that will set aside time for teaching activities through the E-L portal, prepare policy guidelines, and provide incentives to faculty members to encourage E-L portal usage. Universities can use the finding to improve their concerns of the factors involved, as that would enable the academics to use more effectively the online learning system installed at great cost in the universities. In addition, this theoretically contributes to consider the academic position and the computer literacy skills level as the determinants of portal usage.
Physical properties of menstrual hygiene waste as feedstock for onsite disposal technologies
Authors: Sasidaran Sarani , Kachoria Prateek , Raj Antony , Ramalingam Sudha , Stoner Brian R. , Sellgren Katelyn L. , Grego Sonia
Published: February 2021

Onsite incinerators offer a promising solution to the challenges of menstrual waste disposal, particularly in institutional settings. However, thermochemical processes are well known to depend on the nature of the feedstocks and their moisture content (MC). An analysis is presented of the physical properties of menstrual waste as potential feedstock for onsite incinerators. Waste was generated in three institutional settings – from women of wide age range and from people with different socioeconomic backgrounds such as workers and students. Over 10 separate collections, 613 discarded menstrual pads were obtained with over 93% of the waste representing commercially disposable pads and less than 7% of the waste appearing to be homemade cloth pads. A surprising finding of this study was that a significant fraction of the commercially disposed pads (23–37%) had a large wet weight (over 20 g) which was associated with MC exceeding 50 wt%. This high MC was attributed to the practice of washing the pads prior to disposal, and it was much higher than what is standard for thermal processing. These data suggest that testing protocols for menstrual waste incinerator technology performance should include an evaluation of the effects of higher MC, unfolded pads, and occasional cloth pads.
Impact of sunspot activity on the rainfall patterns over Eastern Africa: a case study of Sudan and South Sudan
Authors: Mohamed Mostafa A. , El-Mahdy Mohamed El-Sayed
Published: February 2021

The relation between sunspots and rainfall patterns is still obscure in Africa, especially for Sudan and South Sudan. This research explores the response of rainfall to solar activity in eastern regions of Africa, with a case study in Sudan and South Sudan. Rainfall varies with time; therefore, skillful monitoring, predicting, and early warning of rainfall events is indispensable. Severe climatic events, such as droughts and floods, are critical factors in planning and managing all socioeconomic activities. Similar trends for the sunspot activity (sunspot number and sunspot groups) changes and rainfall variations for different stations in East Africa during the years 1910–2018 were not found. Correlation analysis carried out for the above period indicated a weak negative correlation between the total rainfall and the average number of sunspots over the long-term scale for selected stations in Sudan and South Sudan. The overall result of the paper indicated no significant relationship between sunspot numbers and rainfall in temporal and spatial scales in Sudan and South Sudan.
The Spy Power, Technological Innovations, and the Human Dimensions of Intelligence: Recent Presidential Abuse of America’s Secret Agencies
Authors: Johnson Loch K
Published: February 2021

The purpose of national security intelligence is to provide policy officials with an advantage in the making of effective policy, based on the collection and analysis of accurate information from around the world that can help to illuminate a decision. Foreknowledge is invaluable in the service of a nation’s security; and, in the gathering of useful information, technological innovations in the world of intelligence can result in a stronger shield to protect citizens against the many dangers that lurk across the continents in this uncertain and hostile world. 
Despite all the marvels of modern espionage tradecraft, the governments that rely on them must still deal with the human side of intelligence activities. Unfortunately, arrogance, shortsightedness, laziness, frenetic schedules, and the corrosive influences of power (among other flaws) often lead policy officials to ignore or warp the advantages they could accrue from advanced intelligence spycraft, if they would only use these sources and methods properly. This article examines some of the problems that imperfect human behavior has created for intelligence in the United States at the highest levels of government over the past two decades.