bluuebunny/crossref_metadata_2025 huggingface dataset:
PERHITUNGAN LENGAN EXCAVATOR KAPASITAS 450 KG UNTUK LABORATORIUM
Authors: Ucok Mulyo Sugeng  , Deniyanto
Published: August 2020

Dewasa ini sistem hidrolik banyak digunakan dalam berbagai macam industri. Salah satu alat yang menggunakan sistem hidrolik adalah hydraulic excavator atau excavator hidrolik. Penggunaan alat ini harus memperhatikan kapasitasnya. Penggunaan melampaui kapasitas berakibat kerusakan dan kecelakaan. Tujuan penelitian ini adalah untuk mengetahui kapasitas beban design vs actual dari excavator hidrolik kapasitas 450 Kg yang digunakan di laboratorium. Metode yang digunakan dalam penelitian ini adalah analisis kuantitatif yaitu Analisa mekanis pada setiap parts yg terkait dan uji analisa FEM . Dengan dilakukan perhitungan ini maka dapat diketahui kekuatan dan kapasitas lengan excavator serta cara kerja dari sistem hidrolik. Hasil dari penelitian yaitu dengan perhitungan, rangka meja penopang lengan excavator mempunyai tegangan maksimal (σ = 15.62 N/mm²) lebih kecil dari tegangan maksimal bahan (σ = 350 N/mm²), dengan SF=22,4  maka konstruksi meja penopang alat peraga lengan excavator dinyatakan aman . Sedangkan untuk kekuatan silinder hidrolik mempunyai gaya pada saat in stroke sebesar F= 20.742 N dan saat out stroke sebesar F= 27.632 N. Jika kekuatan silinder hidrolik dibandingkan dengan beban total lengan excavator yang memiliki beban design maksimal terbesar diterima oleh silinder Boom yaitu sebesar  F= 9.037,05 N, nilai ini lebih kecil dibandingkan  kapasitas gaya dorong  silinder F= 27.632 N, maka dapat disimpulkan bahwa sistem hidrolik aman digunakan karena gaya dorong lebih besar dari beban maksimal.
PERSEPSI GAP KUALITAS DAN PENGEMBANGAN PRODUK PADA INDUSTRI BERBASIS KEDELAI DI UMKM TAHU CILEUNGSI
Authors: M Ali Pahmi  , Ahmad Maulana  , Mansyur Sidik  , Rizki Maulana
Published: August 2020

Latar Belakang Sektor Agribisnis dan sektor industri olahan merupakan dua sektor industri terbesar di Indonesia namun dalam beberapa tahun ini data BPS menunjukan terjadi penurunan pertumbuhan. Kawasan lebak Cileungsi merupakan salah satu kawasan di Cileungsi Bogor yang juga pernah mengalami masa era kejayaan UMKM tahu tempe di tahun 80-90. Namun saat ini, skala industri dan jumlah pengusahanya semakin berkurang. Tujuan Penelitian ini bertujuan untuk menganalisa gap persepsi kualitas produk tahu tempe berdasarkan 8 dimensi kualitas garvin dan merumuskan rencana pengembangan produk baru yang sesuai dengan ekspektasi market di sekitar area cileungsi. Metode penelitian dimulai dengan data primer awal guna memetakan business process industri tahu tempe dan memetakan formulasi 8 dimensi kualitas garvin dalam produk tahu tempe dan sampel kuesioner dan perceptual map terhadap konsumen terkait gap persepsi kualitas produk tahu tempe di area Cileungsi. Hasil dan Pembahasan. Temuan awal penelitian diketahui terdapat gap kualitas antara produsen dan konsumen. Solusi untuk kemudian diformulasikan menjadi masukan dalam framework pengembangan produk NPD yang di validasi dengan metode AVAC. Dengan tujuan mengembangkan dan meningkatkan daya saing produk industri tahu tempe di Cileungsi.
SISTEM PENDUKUNG KEPUTUSAN PEMILIHAN MAHASISWA BERPRESTASI DENGAN METODE SIMPLE ADDITIVE WEIGHTING
Authors: Erma Kurniasari Nurhasanah  , Slamet Abadi  , Pria Sukamto
Published: August 2020

Dalam perguruan tinggi mahasiswa dituntut untuk dapat aktif dan memiliki prestasi dalam bidang akademik dan non akademik. Untuk itu dalam pemilihan mahasiswa berprestasi tidak hanya mempunyai nilai Indeks Prestasi Kumulatif (IPK) bagus, akan tetapi juga didukung dengan kemampuan lainnya. Dalam proses menentukan mahasiswa berprestasi di Sekolah Tinggi Teknologi Muhammadiyah Cileungsi masih dilakukan secara manual sehingga, dalam proses pengolahan data dapat memakan waktu lama dan dapat beresiko terjadinya kesalahan dalam proses penilaian. Tujuan dari penelitian ini yaitu membuat sebuah Sistem Pendukung Keputusan (SPK) pemilihan mahasiswa berprestasi.  Metode yang digunakan dalam penelitian ini yaitu metode Simple Additive Weighting (SAW), konsep dari metode SAW adalah menentukan nilai bobot untuk setiap atribut kemudian dilanjutkan dengan proses perangkingan untuk menentukan alternatif terbaik. Sistem yang dibuat menggunakan Hypertext Preprocessor (PHP) sebagai bahasa pemrograman, dengan database MySQL. Hasil akhir yg didapat, sistem ini dapat menghasilkan output berupa laporan daftar calon mahasiswa berprestasi beserta nilai hasil perhitungan menggunakan metode SAW, dan berdasarkan perhitungan dari 6 aspek yang terdapat pada ISO 9126 memiliki nilai persentase sebesar 70,41% dengan skala baik, dari 6 aspek tersebut yang memiliki nilai persentase tertinggi yaitu maintainability (pemeliharaan) dengan nilai persentase 74,3%  dan dinyatakan dengan skala baik.
MENGHITUNG TEGANGAN STATIK PADA STRUKTUR RANGKA SEPEDA BMX MENGGUNAKAN SOFTWARE CATIA
Authors: Firmansyah Azharul  , Mohammad Fadel  , Rahmawati
Published: August 2020

Rangka komponen terpenting dari sepeda yang berfungsi menopang berat yang di berikan oleh pengendara, karena itu rangka pada sepeda BMX harus aman dan kuat. Tujuan dari penelitian ini adalah melakukan analisis rangka sepeda BMX dilakukan pada area sambungan antara bottom tube dan headtube. Adapun metode penelitian menggunakan software CATIA P3 VR14 dengan fitur finite element analysis (FEA), adapun material yang dipergunakan material Chromoly 4130 dengan pembebanan 2000 N. Hasil perhitungan yang dilakukan dalam meningkatkan displacement 74% dan 86%, sedangkan regangan meningkat 100%, hal ini menandakan tidak terjadi lagi regangan setelah ditambahkan penguat, didapatkan hasil 75%, kemudian perhitungan displacement maksimum pada u5 dan u6 mendapatkan hasil 46,4 mm. Berdasarkan actual rangka tanpa ada tambahan penguat lebih rendah menjadi 44,9 mm. Setelah mendapatkan hasil actual desain tanpa penguat 1.5601e+006 mm dan setelah menggunakan penguat dengan software CATIA sebesar 7.3915e+006 mm, sedangkan tegangan maksimum sebelum ditambahkan penguat terdapat pada σx7 1360 N/mm2 dan σx8 yaitu sebesar 1306 N/mm2, sesudah ditambahkan penguat menjadi 1258 N/mm2 dan 1288 N/mm2. Hasil simulasi software CATIA diperoleh deformasi  bagian bawah rangka tanpa penguat yang di tampilkan dengan visualisasi warna merah, dimana warna tersebut mengindikasikan beban yang cukup berat, dan setelah di berikan penguat terjadi perubahan warna menjadi orange yang menandakan rangka bawah tersebut aman, kemudian setelah ada tambahan penguat dan perhitungan tegangan beban masih dalam kondisi normal terhadap Chromoly 4130, dimana dalam pengujian tegangan luluh didapat nilai 2.104e+9N/m2.
PEMBUATAN BIOETANOL DARI KULIT PETAI (PARKIA SPECIOSA HASSK) MENGGUNAKAN METODE HIDROLISIS ASAM DAN FERMENTASI SACCHAROMYCES CEREVISIAE
Authors: Herdini  , Gobby Rohpanae  , Veriah Hadi
Published: August 2020

Kebutuhan etanol semakin bertambah dengan semakin banyaknya pabrik farmasi dan sekolah farmasi maupun kimia dan kebutuhan sumber energi terbarukan yang besar di Indonesia. Solusi untuk mengatasi persoalan tersebut adalah dengan mengembangkan bioetanol. Penelitian ini bertujuan untuk membuat bioetanol dari kulit petai (Parkia speciosa Hassk.) yang dihidrolisis oleh asam klorida 2.0%. Bahan baku bioetanol biasanya mengandung karbohidrat yang cukup tinggi dan kulit petai mengandung karbohidrat sebesar 68.3-68.75%.  Sebelum dilakukan perlakuan, sampel tanaman petai (Parkia speciosa Hassk.) dilakukan determinasi selanjutnya petai dipanen berjumlah 2.5 kg dengan kondisi buah yang segar, telah matang serta tidak busuk. Panen petai dilakukan hanya dari satu pohon saja, kulit yang diambil adalah kulit petai yang segar tidak kering atau busuk, dan telah dipisahkan dari bijinya. Hidrolisis asam dilakukan  pada  temperatur  70°C selama  4 waktu perlakuan yang mana sampel pertama (sampel A dihidrolisis selama 30 menit), sampel kedua (sampel B dihidrolisis selama 60 menit), sampel ketiga (sampel C dihidrolisis selama 90 menit), sampel keempat (sampel D dihidrolisis selama 120 menit). Hasil hidrolisis karbohidrat monosakarida yang diuji kualitatif menunjukkan hasil positif dengan larutan Benedict. Larutan hidrolisat positif golongan karbohidrat monosakarida hasil hidrolisis asam yang difermentasi menjadi etanol dengan bantuan Saccharomyces cerevisiae pada pH 4. Kadar bioetanol yang dihasilkan ditentukan menggunakan metode densitas dengan alat piknometer 10 ml. Hasil penelitian menunjukkan bahwa pada konsentrasi asam 2,0%, temperatur 70°C, waktu hidrolisis 120 menit, dan menggunakan Saccharomyces cerevisiae diinkubasi selama 5 hari menghasilkan kadar bioetanol tertinggi sebesar 3,0%.
EFECTOS DE LA TOXICIDAD CUTÁNEA INDUCIDA POR EL TRATAMIENTO ANTI-EGFR EN LA CALIDAD DE VIDA DE LOS PACIENTES DEL HOSPITAL DE DÍA ONCOLÓGICO DEL HOSPITAL UNIVERSITARIO DE BURGOS
Authors: CALVO LAURA
Published: August 2020

Introducción: Los inhibidores del Receptor del Factor de Crecimiento Epidérmico (Epidermal Growth Factor Receptor, EGFR) son fármacos antineoplásicos que actúan de forma dirigida sobre mecanismos implicados en el crecimiento celular neoplásico. No obstante, se asocian con efectos adversos que afectan a la piel, pelo y uñas.

Objetivo: Evaluar el efecto de la toxicidad cutánea en la calidad de vida de los pacientes del Hospital de Día Oncológico del HUBU que reciben el tratamiento anti- EGFR.

Material y método: Estudio descriptivo, transversal, y de tipo cuantitativo. Los 17 pacientes completan un cuestionario, Functional Assessment of Cancer Therapy (FACT), que evalúa la calidad de vida en dominios: físico, emocional, social y funcional.

Resultados y discusión: El dominio que más influye en la calidad de vida es el físico, seguido del emocional, funcional y social. Las mujeres presentan peor calidad de vida en todos los dominios con respecto los hombres. Los pacientes que han suspendido algún ciclo del tratamiento presentan mayor afectación del RPP que los pacientes que no han suspendido ningún ciclo. La enfermería resulta vital para la identificación y tratamiento de los efectos adversos.

Conclusión: La calidad de vida de los pacientes oncológicos se ve afectada negativamente por los efectos adversos.

ABSTRACT

Background: Epidermal Growth Factor Receptor (EGFR) inhibitors are antineoplastic drugs that act in a targeted manner on mechanisms involved in neoplastic cell growth. However, they are associated with adverse effects that affect the skin, hair and nails.

Objective: To evaluate the effect of dermatological toxicity on the quality of life of HUBU patients that receiving the anti-EGFR treatment.

Material and method: Descriptive, transversal and quantitative study. The 17 patients complete a questionnaire, Functional Assessment of Cancer Therapy (FACT), which evaluates the quality of life in domains: physical, emotional, social and functional.

Results and discussion: The domain that most influences in the quality of life is the physical, followed by the emotional, functional and social domain. Women presented worse quality of life in all domains with respect to men. Patients who have discontinued a treatment cycle  have a greater involvement of the RPP than patients who have not stopped any cycle. Nursing is vital for the identification and treatment of the adverse effects.

Conclusion: The quality of life of cancer patients is affected negatively by the adverse effect.
Validación de una versión reducida del Cuestionario Estilos de Respuesta Parental (CERP-R) frente a la enfermedad de un hijo
Authors: Egea Zerolo Blanca , García-Vivar Cristina , Núñez Partido Juan Pedro , Visedo Paula , Pitillas Salvá Carlos
Published: August 2020

Tener un hijo con una enfermedad grave puede ser muy estresante para los padres. Con el objetivo de ofrecer a los profesionales de la salud un sistema preciso y de fácil aplicación para detectar diferentes respuestas parentales frente a la enfermedad del hijo se creó una versión breve del Cuestionario de Estilos de Respuesta Parental (CERP).

Objetivo: Analizar la fiabilidad y la validez de una versión reducida del CERP en una muestra de padres de niños y adolescentes con enfermedad crónica.

Metodología: Se analizaron las características psicométricas (validez, fiabilidad y análisis factorial) de una versión reducida a 16 ítems de la versión original del CERP, que mide principalmente cuatro formas de respuesta parental negativa frente a la enfermedad del hijo: desgana/disforia, irritabilidad/rechazo, sobreprotección y percepción de desajuste. La muestra estuvo compuesta por 28 padres y madres de un hijo enfermo.

Resultados: El análisis de fiabilidad de la versión reducida (CERP-R) mostró un índice de consistencia interna alto. En los datos globales del cuestionario no hay diferencias estadísticamente significativas entre padres y madres de las mismas parejas en cuanto a su puntuación global. En el análisis por factores, las respuestas de disforia/desgana son significativamente más altas en madres, mientras que la sobreprotección es significativamente superior entre padres.

Conclusión: El CERP-R  analiza las diferencias en las respuestas afectivas de los padres y madres frente a la enfermedad del hijo. Es un instrumento fiable y válido, que permite medir los diferentes estilos de respuesta parental, de cara a planificar intervenciones familiares.
Effect of Nurse Therapeutic Communication on Patient Satisfaction in the Installation of Genreral Hospital in Massenrempulu, Enrekang District
Authors: Primadianty Indri , . Indar , Arifin Alwi , Razak Amran , Salmah Ummu , . Syamsuddin
Published: August 2020

Therapeutic communication is one of the important keys in providing patient services in hospitals. Nurses who have communication skills, not only will easily establish a relationship of trust with patients, also prevent illegal problems, and increase satisfaction in the hospital. This study aims to analyze the effect of nurses' therapeutic communication with patient satisfaction in the inpatient installation at Massenrempulu District Hospital Enrekang. The method used is this research is an observational analytic with cross sectional study design. The population in this study were patients in the inpatient hospital of Massenrempulu District Hospital. The research sample of 75 people. The technique of determining the sample is to use the accidental sampling method. Analysis of the data used is chi square and multiple logistic regression. The results showed that the majority of respondents aged 40-49 years (25.3%), were female (61.3%), had elementary / equivalent education (30.7%) and worked as farmers (36.0%). The analysis showed that there was a statistically significant relationship between the variable respect (0.002), positive attitude (0.019) and not a meaningful relationship opening up (0.239) with patient satisfaction. The results of multivariate analysis with multiple logistic regression tests showed that the positive attitude of Exp (B) or Odds Ratio was 0.595. The most dominant variable influences patient satisfaction in the inpatient installation of Massenrempulu District Hospital, Enrekang Regency.
Dynamical Instabilities in Systems of Multiple Short-period Planets Are Likely Driven by Secular Chaos: A Case Study of Kepler-102
Authors: Volk Kathryn , Malhotra Renu
Published: August 2020

We investigated the dynamical stability of high-multiplicity Kepler and K2 planetary systems. Our numerical simulations find instabilities in ∼20% of the cases on a wide range of timescales (up to 5 × 109 orbits) and over an unexpectedly wide range of initial dynamical spacings. To identify the triggers of long-term instability in multiplanet systems, we investigated in detail the five-planet Kepler-102 system. Despite having several near-resonant period ratios, we find that mean-motion resonances are unlikely to directly cause instability for plausible planet masses in this system. Instead, we find strong evidence that slow inward transfer of angular momentum deficit (AMD) via secular chaos excites the eccentricity of the innermost planet, Kepler-102 b, eventually leading to planet–planet collisions in ∼80% of Kepler-102 simulations. Kepler-102 b likely needs a mass ≳0.1 M
⊕, hence a bulk density exceeding about half Earth’s, in order to avoid dynamical instability. To investigate the role of secular chaos in our wider set of simulations, we characterize each planetary system’s AMD evolution with a “spectral fraction” calculated from the power spectrum of short integrations (∼5 × 106 orbits). We find that small spectral fractions (≲0.01) are strongly associated with dynamical stability on long timescales (5 × 109 orbits) and that the median time to instability decreases with increasing spectral fraction. Our results support the hypothesis that secular chaos is the driver of instabilities in many nonresonant multiplanet systems and also demonstrate that the spectral analysis method is an efficient numerical tool to diagnose long-term (in)stability of multiplanet systems from short simulations.
FRB 200428: An Impact between an Asteroid and a Magnetar
Authors: Geng Jin-Jun , Li Bing , Li Long-Biao , Xiong Shao-Lin , Kuiper Rolf , Huang Yong-Feng
Published: August 2020

A fast radio burst (FRB) was recently detected to be associated with a hard X-ray burst from the Galactic magnetar SGR 1935+2154. Scenarios involving magnetars for FRBs are hence highly favored. In this work, we suggest that the impact between an asteroid and a magnetar could explain such a detection. According to our calculations, an asteroid of mass 1020 g will be disrupted at a distance of 7 × 109 cm when approaching the magnetar. The accreted material will flow along the magnetic field lines from the Alfvén radius ∼107 cm. After falling onto the magnetar’s surface, an instant accretion column will be formed, producing a Comptonized X-ray burst and an FRB in the magnetosphere. We show that all the observational features of FRB 200428 could be interpreted self-consistently in this scenario. We predict quasi-periodic oscillations in this specific X-ray burst, which can serve as an independent observational test.
Taxonomic note on Parnassia (Celastraceae): the identity of P. nubicola
Authors: Ma Yonghong , Zhou Hanlu , Shu Yumin
Published: August 2020

Based on examination of herbarium specimens (including types) and living plants, as well as analysis of protologues and distributions, Parnassia tibetana, P. nubicola subsp. occidentalis, and P. nubicola var. nana are reduced to synonyms of P. nubicola.
Le poids économique direct de la culture en 2018
Authors: Turner Laure
Published: August 2020

En 2018, le poids économique direct de la culture, c’est-à-dire la valeur ajoutée de l’ensemble des branches culturelles, est de 47 milliards d’euros. La part de la culture dans l’ensemble de l’économie s’établit ainsi à près de 2,3 %, soit un poids stable pour la sixième année consécutive. Le recul des branches du livre, et plus particulièrement de la presse, continue de peser sur la croissance. À l’inverse, l’audiovisuel, première branche culturelle en termes de poids économique (28 % de la valeur ajoutée de l’ensemble des branches culturelles), les arts visuels et, cette année, le patrimoine, soutiennent la croissance de la valeur ajoutée de la culture. En 2017, 670 000 personnes travaillent dans les secteurs culturels (2,5 % de la population active), principalement dans le livre et la presse (19 %), les arts visuels (16 %) et l’audiovisuel (15 %). Un tiers des actifs travaillant dans les secteurs culturels sont indépendants, contre seulement 12 % dans la population active.
Médialités biographiques, pratiques de soi et du monde
Authors: Delory-Momberger Christine , Bourguignon Jean-Claude
Published: August 2020

Les notions de « médium » et de « médialité » apportent un renouvellement très fécond dans la manière de penser les médiations du rapport à soi. En montrant le rôle déterminant du médium, de son matériau et de ses formes spécifiques dans le façonnage du rapport à soi, elles amènent à reconnaître que le sujet se constitue dans des pratiques qui sont ce par quoi et ce dans quoi une subjectivité se constitue. Par ailleurs, la notion de « pratiques automédiales » permet d’englober toutes les formes d’expression et de langage : parlées et écrites, photographiques, visuelles, sonores, graphiques, plastiques, numériques, corporelles et gestuelles, scéniques, etc. Entre autres conséquences, la réflexion liée à la « médialité », tout en élargissant le champ des pratiques, ouvre les démarches de formation à de nouvelles approches plus conscientes du rôle constitutif des médiations dans les processus de construction du sujet.
Théâtre et art martial comme médiateurs de soi et de l’indicible
Authors: Drouelle Carole
Published: August 2020

Au-delà de la recherche d’efficacité, les arts martiaux asiatiques visent à une construction du sujet. Leur action automédiale offre une expérience d’unité de soi. Ils constituent donc des « techniques de soi » (Foucault). Afin de faire apparaître l’indicible sur scène, l’acteur doit préparer son corps par une pratique particulière, par exemple celle d’un art martial. Le metteur en scène russe A. Vassiliev a choisi le wu shu pour construire un « acteur transparent » au service d’un théâtre métaphysique. Ainsi, la pratique martiale fournit à l’acteur à la fois une technique automédiale et une voie pour incarner l’indicible sur scène.
L’expérience de récits de vie en théâtre de terrain : du jeu au je, un théâtre relationnel pour déjouer le réel
Authors: Bouve Catherine
Published: August 2020

Ce texte présente une recherche empirique menée à partir d’un théâtre de terrain, théâtre relationnel , mené par le metteur en scène Ricardo Lopez Munoz. C’est un théâtre qui se construit avec des habitants. Dans ce dispositif de création, le récit, défini en tant que variété de médium (récits d’objets, de photos, etc.) tient une place centrale. Il peut être analysé comme pouvoir d’agir, en tant que pratique de soi, d’un sujet en capacité d’élaborer un récit sur son vécu, qui l’inscrive dans une historicité. À partir de récits singuliers se constitue progressivement une scénographie de récit collectif, en prise avec la réalité du monde.
Techniques de soi et maintien biographique : une enquête sur les pratiques numériques des personnes à la rue
Authors: Trainoir Marianne
Published: August 2020

La vie à la rue impose aux personnes un certain nombre d’épreuves spécifiques qui fragilisent les individus toujours contraints de lutter contre la déprise. Elle exacerbe les questions de l’identité, de la mémoire et de la projection. Dans cette perspective, les pratiques numériques peuvent être analysées comme des techniques de soi contribuant à la lutte pour le maintien de soi. Constituant une entrée pour l’observation et l’analyse des pratiques de biographisation, les pratiques et expressions numériques permettent de transformer le rapport à soi et au monde, notamment à travers des pratiques de micro-récits de soi. Mais ces micro-récits ne servent pas toujours un récit cohérent permettant d’agir et de se projeter.
Images et monde du sensible dans un carnet de route
Authors: Baeza Carole
Published: August 2020

À partir d’une expérience de recherche sur la pratique d’écriture créative et esthétique de soi en santé (le carnet de route), nous analyserons la prégnance des images et du monde du sensible dans le processus de biographisation.
Médialités biographiques de la pratique scientifique
Authors: Dheur Sonia
Published: August 2020

Après avoir mené une longue activité de recherche fondamentale en biologie, je me suis interrogée sur le processus de biographisation du sujet-cherchant dans et par la pratique scientifique. Avec des collègues chercheurs en sciences humaines et sociales, géographes pour la plupart, mais aussi anthropologues, philosophes, chercheurs en sciences de l’éducation et en littérature, nous nous sommes réunis régulièrement pendant trois ans dans le cadre d’un séminaire visant à explorer la dimension poétique de la pratique scientifique dans le contexte d’élaboration des savoirs académiques qui est le nôtre. Ma communication tente de revisiter cette animation scientifique au prisme de la recherche biographique.
A coupled $ p $-Laplacian elliptic system: Existence, uniqueness and asymptotic behavior
Authors: Zhang Yichen , Feng Meiqiang
Published: August 2020

We prove uniqueness, existence and asymptotic behavior of positive solutions to the system coupled by $ p $-Laplacian elliptic equations

   $ \begin{align*} \left \{ \begin{array}{l} -\Delta_p z_1 = \lambda_1 g_1(z_2)\ \ {\rm in}\ \Omega,\\ -\Delta_p z_2 = \lambda_2 g_2(z_1)\ \ {\rm in}\ \Omega,\\ z_1 = z_2 = 0\ \ {\rm on}\ \ \partial \Omega, \end{array} \right. \end{align*} $

where $ \Delta_p u = \text{div}({|\nabla u|}^{p-2}\nabla u),\ 1
, $ \lambda_1 $ and $ \lambda_2 $ are positive parameters, $ \Omega $ is the open unit ball in $ \mathbb{R}^N,\ N\geq 2 $.
Gorenstein global dimensions relative to balanced pairs
Authors: Liu Haiyu , Zhu Rongmin , Geng Yuxian
Published: August 2020

Let $ \mathcal{G}(\mathcal{X}) $ and $ \mathcal{G}(\mathcal{Y}) $ be Gorenstein subcategories induced by an admissible balanced pair $ (\mathcal{X}, \mathcal{Y}) $ in an abelian category $ \mathcal{A} $. In this paper, we establish Gorenstein homological dimensions in terms of these two subcategories and investigate the Gorenstein global dimensions of $ \mathcal{A} $ induced by the balanced pair $ (\mathcal{X}, \mathcal{Y}) $. As a consequence, we give some new characterizations of pure global dimensions and Gorenstein global dimensions of a ring $ R $.
Neuro-mechanical aspects of playing-related mobility disorders in orchestra violinists and upper strings players: a review
Authors: Mizrahi Joseph
Published: August 2020

Orchestra musicians are at high risk of neuro-mechanical disorders due to the intense stresses their body withstand, leading to pain and injury. This review presents a comprehensive account of the works on the circumstances and types of playing related mobility disorders of upper strings players, as well as on the relevant neuro-mechanical factors and perspectives to those disorders. The following aspects are considered: asymmetry and imbalance in the musculo-skeletal system, muscle-bone-joint interactions, repetitive overloading and fatigue. An additional factor relates to neuro-muscular redundancy in the motor system, whereby more muscles and tendons than strictly necessary are engaged in performing a motor task, thus making the system indeterminate, with no unique solution. This same task can be performed with different muscle combinations. It is thus of interest to verify whether playing disorders may be alleviated by considering alternative techniques of performance.
‘That song moves me to tears’ – Emotion, memory and identity in encountering Christian songs
Authors: Tönsing J. Gertrud
Published: August 2020

This article aims to explore the complex issue of the emotive effect of Christian songs. It is based mainly on a literature survey, using sources both from Christian hymnology and musicology. It also uses illustrative examples from three informal surveys in congregations on the reasons particular songs are favourites. The point is made that exploring this issue scientifically is very complex as there are so many variables in people’s appreciation of songs. Some of these elements are discussed, such as the effect of the external setting in which people experience a song, factors important in the appreciation of a text, such as poetic quality and knowledge of the author’s background. Other factors are the emotive quality and level of difficulty of a tune and in what time this style was popular. Then there are the internal factors, such as the link of a song with group identity and special memories. Some of the survey results corroborate the pointers in the literature for what makes certain songs particularly emotionally appealing. Some of these were a preference for musical styles popular in one’s youth, the importance of relationships with significant others for forming favourites and the important element of memory in the emotional impact of songs. Concluding pointers for worship include motivating for different styles of music in worship and carefully finding those songs in each new musical genre, which have the potential for sustaining today’s youth into the future.Contribution: This article makes a contribution in what is a complex and often emotionally charged issue in congregations: Worship styles and musical preferences. It argues for the importance of using different musical styles and bringing the generations together.
Perception of seismic design by architects in Algeria
Authors: Benfarhat Bachir , Benouar Djillali , Cartier Stéphane
Published: August 2020

The purpose of this article is to analyse the results of a survey towards the architects and engineers of construction in order to estimate the perception of the anti-seismic protection amongst these professionals. It focuses more on the architects who design buildings and, in many cases, monitor their implementation. The main result is the observation of inadequacies and gaps in seismic culture amongst the professionals, especially architects. These difficulties require the reinforcement of earthquake-resistant training. This effort to upgrade skills is as important as other aspects of the preventive management of the seismic risk in Algeria.
Bridging the gap between technical and social competencies of urban and regional planning through mobile technology: The case of Cape Peninsula University of Technology
Authors: Pinfold Nicholas , Mokhele Masilonyane
Published: August 2020

Higher education institutions are entrusted with the responsibility of training future workforces that are well equipped to function in the age of the 4th industrial revolution (4IR). This role is pertinent in light of growing concerns that with the advent of 4IR, mobile technology and robotics would take over certain roles that are currently performed by humans. Using the case of Goedverwacht community service-learning project in the Western Cape province of South Africa, this paper demonstrates ways in which mobile technology is embraced and applied in urban and regional planning education at Cape Peninsula University of Technology (CPUT). The purpose of the service-learning collaboration between the Goedverwacht community and CPUT was to produce a spatial map depicting property boundaries so that the community could, amongst others, be ready for the imminent land tenure reform processes. With the input and guidance of community members, the map was compiled through the use of mobile and allied technology, including global positioning system-enabled smartphones, drones and mobile geographic information system.
Principalization of ideals on toroidal orbifolds
Authors: Abramovich Dan , Temkin Michael , Włodarczyk Jarosław
Published: August 2020

Given an ideal

\mathcal I

on a variety

X

with toroidal singularities, we produce a modification

X' \to X

, functorial for toroidal morphisms, making the ideal monomial on a toroidal stack

X'

. We do this by adapting the methods of [Wło05], discarding steps which become redundant.

We deduce functorial resolution of singularities for varieties with logarithmic structures. This is the first step in our program to apply logarithmic desingularization to a morphism

Z \to B

, aiming to prove functorial semistable reduction theorems.
SPECIFICATION FOR TESTING AUTOMOTIVE LED MODULES
Authors:   USCAR
Published: August 2020

This specification is a general level subsystem light source specification that establishes test requirements of light emitting diode (LED) components and modules for use in automotive lighting systems.

The completed test data from this test specification is intended to be provided to the OEM by the Tier 1 lamp set maker as part of the lamp assembly PPAP. Re-testing shall be required if any portion of the approved LED module experiences a design, manufacturing, or component change.

This document shall be applied to systems that meet the requirements for design, performance, and validation established by government standards.

The LED module is defined as the LED devices and any electronics required to properly energize the LEDs using a vehicle electrical power system along with any associated electrical wiring, connectors, and thermal management system. Samples shall be tested as a subsystem and considered one test sample for the entire test sequence. A failure of any component in the test sample shall constitute a failure of the entire sample.

NOTE: If other manufacturers’ components are intended to be approved for use in the LED modules, then those possible combinations of components shall be considered a new LED module and shall also be tested.

Additional testing may be required by individual OEMs to meet specific EMC, quality, reliability, and durability objectives.

The following tests are to be performed under the following conditions:

New sample.

Design or process change made to an existing module.

Completion of one calendar year as noted in the annual tests table shown in Appendix E. (Note: Production process control data, collected at a shorter interval per an approved control plan, may be substituted if approved by customer’s responsible engineer and purchasing representative.)
Economic analysis of land management practices among crop farmers in Osun State, Nigeria
Authors: Ezekiel A.A. , Ayinde E.O. , Akinsola G.O.
Published: August 2020

Increase in soil degradation has negatively impacted on food production. This therefore necessitates sound land management practices. This study analyzed the economics of the land management practices among crop farmers in Osun State, Nigeria. Data were collected with the aid of structured interview schedule from 80 respondents in four Local Government Areas of the state using a three-stage sampling techniques. Budgetary and multiple regression analyses were the analytical tools employed. About 63% of the farmers were male and 78.4% of them were above 38 years. Seventy-two percent of the farmers had secondary sources of income. The average gross margin of the farms was N48,456.56k. The total value product increases by a value of N4.90K for every N1 increase in the total variable cost. The study concludes that land management practices such as fertilizer application, length of fallow on land and length of tillage on land have a positive effect on crop output in the study area. Therefore, extension services should be intensified to disseminate modern ideas and technology in crop farming for greater productivity. Activities that promote soil tillage for crop production should be encouraged as this would increase crop output.

Keywords: Economic analysis, Land management, Fallowing, Crop output
Potentials for the commercialization of Cocoyam in Oyun Local Government Area, Kwara State, Nigeria
Authors: Omotesho K.F. , Kayode A.O. , Adebayo S.A. , Akinrinde A.F. , Mohammed A.J.
Published: August 2020

Despite the nutritional and other advantages of cocoyam over some tuber crops, it remains neglected, underutilised, and non-commercialized in many parts of Nigeria. The study assessed the potentials for the commercialisation of cocoyam. Specifically, it assessed farmers’ awareness of the uses of cocoyam, level of cocoyam cultivation, farmers’ attitude towards its commercialisation, and the constraints to its commercialisation. Two-stage random sampling technique produced 154 respondents and an interview schedule was administered to collect data. Descriptive statistics and the multiple regression analysis were used for data analysis. Results revealed that farmers’ mean age, farming experience and farm size were 53.9  years, 22 years, and 4.3 acres respectively. The level of awarenessof the uses of cocoyam was high (73.52%) and had an averagely positive attitude (mean score = 2.38) towards its commercialisation. Cultivation of cocoyam was mostly on a subsistence level among the farmers (97.3%). High susceptibility to pests and diseases (MS = 3.13) and a higher preference for other tuber crops (MS = 3.09) were the major constraints to the  commercialisation of cocoyam. Farmers’ age (β = –0.008), level of education (β = –0.046), household size (β = –0.012), and frequency of extension contact (β = 0.018) determined farmers’ attitude towards its commercialisation. The study concluded that the potentials for the commercialization of cocoyam was appreciable in the study area. Findings underscore the need for research on cocoyam pest and diseases control as well as breeding ofimproved varieties of the plant by National Root Crops Research Institutes.

Key words: attitude, commercialization, neglected, under-utilized and cocoyam
Isolation and Characterization of Lupeol from the Stem of Tapinanthus globiferus (A Rich.) and its Antimicrobial Assay
Authors: Emaikwu V. , Ndukwe I.G. , Mohammed R. , Iyun O.R.A. , Anyam J.V.
Published: August 2020

Lupeol, a pentacyclic triterpenoid, was isolated from hexane and ethyl acetate solvent system. In antiquity, the stem and leaf infusion of Tapinanthus globiferus has been used ethno-medicinally as a remedy for stomach ache, diarrhea, dysentery, and wounds. Lupeol isolation from this species was carried out by column chromatography after concentrating the crude extract using a rotary evaporator, and the structure was determined by analysis of the isolate by IR, 13CNMR, 1HNMR, HSQC, and HMBC spectral analysis as well as comparison with reported data. This is the first isolation of lupeol from the stem of this species.

Keywords: Tapinanthus globiferus, Column chromatography, dysentery, Lupeol
Kinetic and Thermodynamic Study of Oxidative Decolourisation of a Typical Food Dye (Tartrazine) in an Aqueous Environment
Authors: Okeola F.O. , Odebunmi E.O. , Amoloye M.A. , Babamale H.F. , Thema S. , Abdulsalam J.O.
Published: August 2020

The study was carried out to describe the kinetics and thermodynamics of hydrogen peroxide oxidation of a typical food dye (Tartrazine). The effect of different operational factors were investigated spectrophotometricallyat wavelength460 nm under pseudo first order reaction.These included concentration of the oxidant and the dye, the pH, ionic strength and temperature of the reacting medium and the presence of transition metal ion as homogenous catalyst. A complete and smooth decolourisation was observed. The results showed that the rate of oxidation of dye increased with increasing in concentration of substrate and oxidant. Increasing in temperature, ionic strength and pH of the basic reaction medium also raised the reaction rate. The rate of oxidation also increased with increasing in the concentration of Fe (III) ion. Pseudo second order rate constant (k2) obtained was 1.95 x 10-3 M-1s-1 and 3.8 x10-3M-1s-1 in the absence and presence of Fe (III) ion respectively. The Arrhenius activation energy for the oxidation in the absence and presence of Fe (III) ion were 47.23 kJmol-1 and 42kJmol-1 respectively. Other thermodynamic parameters showed entropy of activation (ΔS#), free energy of activation (ΔG#) and Enthalpy of activation of the reaction (ΔH#) in the presence of Fe (III) as -34.7  JK-1mol-1, 48.4 kJmol-1 and 40.30 kJmol-1 respectively. The results in the absence of Fe (III) ion were -24.6 JK-1mol-1, 51.2 kJmol-1 and 44.0 kJmol-1respectively. The relative lower activation energy (Ea),fairly higher negative value of (ΔS#) and higher (ΔG#) , with higher rate constant in the presence of Fe(III) ion showed Fe(III) ion enhancement of rate of decolourisation.

Keywords: Tartrazine Food dye, Kinetics, Thermodynamics, Hydrogen Peroxidede colourisation,
Concentration of Heavy Metals in Vegetables Cultivated around Dumpsites in Jimeta and Ngurore Areas, Adamawa State, Nigeria
Authors: Sakiyo D.C. , Chessed G. , Eli J. , Usongo Y.J.
Published: August 2020

The study analyses the health risk assessment of the concentration of Iron, Lead, Copper, Chromium, and Cadmium heavy metals in vegetables grown near dumpsites of Jimeta and Ngurore areas of Adamawa State, Nigeria. Vegetables mainly Spinach (Spinacia oleracea) and lettuce (Lactuca sativa) were collected in triplicates and analyzed using Atomic Absorption Spectrophotometer Buck 210VGP (AAS). The result revealed that heavy metals detected in spinach at Jimeta dumpsite decreased in the following order: Fe (3.7 mg/kg) > Pb (0.18 mg/kg) > Cu (0.12 mg/kg) > Cr (0.07 mg/kg) > Cd (below limit of detection), compared to the metal concentration in spinach at Ngorure dumpsite with lower concentration of heavy metal which decreased in the order of: Fe (2.5 mg/kg) > Pb (0.16 mg/kg) > Cu (0.14 mg/kg) > Cr (0.02 mg/kg) > Cd (below limit of detection). Other result for Spinach in Jimeta decreased in the order Fe (3.31mg/kg) > Pb (0.2mg/kg) > Cu (0.11mg/kg) > Cr (0.05mg/kg) > Cd (ND) beyond the limit of detection while Lettuce decreased in the order Fe (22.54mg/kg) > Cu (0.31mg/kg) > Pb (0.12mg/kg) > Cr (0.07mg/kg) > Cd (ND) beyond the limit of detection. Fe is the most abundant element in the vegetables with a mean value of 21 mg/kg followed by Pb (0.177 mg/kg). The analyses of paired T-test for vegetables in Ngurore and Jimeta at 0.05 level of significant confirmed that Cu and Cr showed no statistically significant difference in their concentration level while Fe and Pb confirmed that there was statistically significant difference in their concentration level. However, the detection of heavy metals in these vegetables calls for close environmental monitoring and adequate public awareness. This is necessary to discourage further pollution which could lead to high metal concentration and metal poisoning in vegetables and invariably humans that consume them.

Keywords: Spinacia oleracea, Lactuca sativa, Heavy metal, Atomic Absorption Spectrophotometer
Evaluation of Revenue Channels and Challenges in Sustainable Management of Oyo State Forest Reserves, Nigeria
Authors: Kolade R.I. , Adejumo A.A. , Olugbire O.O. , Akanni O.F. , Fatoki O.A.
Published: August 2020

Forest revenue system is an instrument used by government to achieve various goals and objectives in forest management. This paper evaluates the various challenges of revenue collection and remittance in Oyo forestry service in Nigeria. A total of 94 forest officials were identified and reached (100%) in all the forestry administrative zones in Oyo State, including the headquarters through a set of structured questionnaire and dataobtained were analyzed using descriptive statistics and logit regression at α0.05. Theaverage age of the respondents was 39.7±6.5 years, mostly male (71%), married (75.6%) and had secondary education (63%). Challenges confronting adequate revenue collection included lack of proper law enforcement, payment of cash by revenue collectors and inability of field officers to withstand armed illegal fellers with odds-ratio of 55694.85,  668.78 and 20.79 respectively. Problems facing adequate revenue remittance were remittance by field staff, inaccessibility ofbank on time, lack of provision of incentives for running cost by the government and possibilities of field officersindulging in printing of fake receipts with odds-ratio of 140.18, 116.80, 3.65 and 3.44 respectively. The studyexposed the various challenges facing adequate revenue collection and remittance in Oyo State forestry service, it istherefore necessary for the forest managers in the State to utilize this information wisely for the betterment of revenuegeneration.

Keywords: Challenges, Revenue collection, Revenue remittance
Evaluation of the Direct Compression Properties of Microcrystalline Cellulose Obtained from Cassava Fermentation Waste in Paracetamol Tablet Formulations
Authors: Eraga S.O. , Elue D.N. , Iwuagwu M.A.
Published: August 2020

Background: Natural materials have gained a lot of significance in the field of drug delivery because of their cost effectiveness and ready availability.Purpose: The study aimed at evaluating the direct compression property of microcrystalline cellulose from cassava fermentation waste in directly compressed paracetamol tablet formulations.Methods: Alkali delignification of the dried cassava fermentation fibres, followed by bleaching and acid depolymerisation was employed in the extraction of α-cellulose and conversion to microcrystalline cellulose (MCC). The MCC obtained and Avicel® were used at different concentrations (5.0-15 %w/w) to formulate batches of paracetamol tablets by directed compression. A comparative evaluation of the formulated paracetamol granules and tablets properties were undertaken.Results: The paracetamol granules formulated showed good flowability with Hausner’s ratios of 1.15-1.25, Carr’s indices of 13.10-20.00 % and angles of repose ≤ 34.41°. The formulated tablets showed good hardness (> 5.0 kgf) and disintegration time within 10 min. Only tablets containing 5.0 and 7.5 %w/w of the test MCC failed the BP dissolution test specification for tablets which stipulates that at least 70 % of the drug should be in solution after 30 min.Conclusion: This study has shown that the extracted MCC has direct compression ability evidenced in the mechanical strength of the formulated paracetamol tablets. The tablet properties of the formulated paracetamol tablets revealed pharmaceutically acceptable tablets though they were not comparable with Avicel® at all concentrations and the MCC may serve as an alternative local source for direct compression excipient.

Keywords: Cassava, microcrystalline cellulose, direct compression, paracetamol, tablets
Investigation of Antioxidant Compositions and Antioxidative Activities of Ethanol Extract of Alstonia boonei Stem Bark
Authors: Uroko R.I. , Sangodare R.S.A. , Onyeabo C. , Agbafor A. , Uchenna O.N. , Nwuke C.P. , Asadu C.L.
Published: August 2020

Background: Oxidative stress is the major mechanism of action employed by many drugs, xenobiotics and toxicants that generate reactive metabolites in the body to elicit adverse reactions when there are insufficient antioxidants to neutralise the excess reactive metabolites.

Objectives: This study evaluated antioxidant compositions and antioxidative activities of ethanol extract of Alstonia boonei stem bark with the view of understanding its ameliorative potentials on oxidative stress.

Materials and Methods: Thirty-six rats divided into 6 groups of 6 rats each was used for this study. Group 1 served as normal control, group 2-6 were carbon tetrachloride-induced oxidative stress which served as treatment groups. Group 2 was untreated, group 3 was treated with silymarin (100 mg/kg) while group 4-6 were treated with the extract 100, 200 and 500 mg/kg body-weight for 28 days respectively. The animal study and antioxidant compositions of the extract were analysed using standard methods.

Results: The extract was found to rich in antioxidant components such as phenols, flavonoids, β-carotene and lycopene. The extract showed high DPPH (2, 2-diphenyl-1-picrylhydrazyl) and nitric oxide radical scavenging activities and high ferric reducing antioxidant power with increasing concentrations. The significant (P < 0.05) reduction in antioxidant enzymes activities and increased level of lipid peroxidation caused by the carbon tetrachloride induction were significantly (P < 0.05) reversed, in the extract-treated groups relative to the normal control.

Conclusions: These findings suggest that the extract possesses antioxidative properties and can be used in the management of oxidative stress and its related disease conditions.

Keywords: Antioxidant components, Alstonia boonei stem bark, Antioxidative stress, Lipid peroxidation, Antioxidant enzymes.