bluuebunny/crossref_metadata_2025 huggingface dataset:
Afrofuturismo e o devir negro do mundo | Afrofuturism and the becoming-black of the world
Authors: Burocco Laura
Published: March 2020

O artigo situa algumas reflexões sobre práticas de decolonização do saber no contexto afro brasileiro. Alerta sobre um possível esvaziamento de termos e teorias, concentrando a atenção no movimento afrofuturista lido em conjunto com o debate sobre o que define afropolitanismo.Versão ampliada deste artigo foi publicada com o título "Afrofuturismo e Perspectivismo Ameríndio: duas ferramentas para um pensamento decolonial" no portal BUALA: http://www.buala.org/pt/a-ler/afrofuturismo-e-perspectivismo-ameri-ndio-duas-ferramentas-para-um-pensamento-decolonial
The Legal Authority of the Jurist and Its Scope in Modern Iran
Authors: Kara Seyfeddin
Published: March 2020

The development of Shīʿi jurisprudence has mostly been studied from the perspective of its relation to political authority. A handful of works that have examined the subject from a purely legal perspective, neglected the influence of Muslim societies on the evolution of Shīʿi legal theory. The paper examines the development of Shīʿi jurisprudence from a legal perspective and argues that there is an intrinsic connection between Islamic law (both Sunni and Shiʿi laws) and Muslim societies. Therefore, the changing values and expectations of society prompt changes in Islamic rulings. In this sense, the evolution of Shīʿi legal theory is no different to Sunni legal theory, and there are striking similarities between Khomeini's theory of Wilāyat al-Faqīh and the Sunni legal notion of maṣlaḥa which both aim to respond to the exigencies of the social change.
Regulation of a Servo Piezo Mechanical Hydraulic Actuator for Intake Valves in Camless Combustion Engines
Authors: Mercorelli Paolo
Published: March 2020

In this paper a hybrid actuator is proposed. The hybrid actuator consists of a piezo mechanical structure and a hydraulic ratio displacement. Particular attention is paid to a liquid spring model of the displacement ratio which represents the hydraulic part of the mechanism. The proposed mechanism represents the fundamental part of a more complex one which consists of a supplementary hydraulic part to control intake valves of a combustion engine. The whole mechanism is controlled using a cascade repetitive control combined with a proportional derivative (PD) controller and a feed-forward action to track a periodic signal. Measured results of the closed loop carried out the suitability of the control approach.
Ecological Sensibility and the Experience of Nature in 20th c. French Literature // Sensibilidad ecológica y la experiencia de la naturaleza en la literatura francesa del s.XX
Authors: Wagner Walter
Published: March 2020

This essay provides a survey of relevant works by Jean Giono, Marguerite Yourcenar and Julien Gracq, three major authors of twentieth-century French literature. All of these authors attempt in various ways to overcome the nature-culture dualism, a largely neglected topic in modern French literature, which is in accordance with a Romantic conception of nature. The following article falls into two parts. In the first part, I will analyse selected examples of experiences of nature that reflect an awareness of the complex interdependence of humans and their natural environment, i.e. a basic form of ecological sensibility. In the second part, I propose to explore the correlation between ecological sensibility and the search for the good life, which aims at cultural and social change. Finally, I will evaluate the three writers’ debt to Romantic ecology and where they transcend it in order to create a modern ecological awareness informed by environmental ethics and science.    Resumen   Este ensayo proporciona una visión general de las obras de Jean Giono, Marguerite Yourcenar, and Julien Gracq, tres grandes autores de la literatura francesa del siglo XX. Estos escritores intentan superar de diferentes formas el dualismo naturaleza-cultura, un tema en gran medida olvidado en la literatura francesa moderna, que está de acuerdo con  una concepción romántica de la naturaleza. El siguiente artículo se divide en dos partes. En la primera parte analizaré una selección de ejemplos de experiencias de la naturaleza que reflejan un conocimiento de la compleja interdependencia de los humanos con su entorno natural, es decir, una forma básica de sensibilidad ecológica. En la segunda parte propongo explorar la correlación entre la sensibilidad ecológica y la búsqueda de una buena vida, que pretende cambio cultural y social. Finalmente, evaluaré la deuda de los tres escritores hacia la ecología romántica y dónde la trascienden para crear una conciencia ecológica moderna influida por la ética medioambiental y la ciencia.
Whole Issue // Número completo
Authors: Martin Junquera Imelda
Published: March 2020

Whole issue 5.1.
“We’re Going in for Natural Training”: Athletics and Agriculture in Jack London’s The Valley of the Moon // "Nos gusta el entrenamiento natural": Atletismo y Agricultura en The Valley of the Moon de Jack London
Authors: Mortensen Peter
Published: March 2020

Jack London was both an athlete and an environmentalist, and in The Valley of the Moon (1913) he represents athletics not as a distraction from environmental issues but as the model for the types of exercise that modern humans must perform to establish a more sustainable relationship to the natural world. Writing what at times resembles a fictional training manual, I argue, London taps into his contemporaries’ anxieties about human physical degeneration and their pervasive fascination with sports, fitness and physical performance. At the same time, London also uses his novel to address environmental degeneration head-on, valorizing early 20th-century agrarian practices designed to regenerate American agriculture and establish American society as a whole on a more ecologically sound basis. The Valley of the Moon merits ecocritical interest, I find, because London uses athletics as a template for thinking about the forms of “natural training” that humans must engage in if they wish to evolve into responsible managers of both their own bodies and the natural environment. Resumen     Jack London era tanto un atleta como un ecologista, y en The Valley of the Moon (1913) representa el atletismo no como una distracción de los problemas medioambientales sino como el modelo de los tipos de ejercicio que los humanos modernos deben realizar para establecer una relación más sostenible con el mundo natural. Escribiendo lo que a veces parece un manual de entrenamiento ficticio, London aprovecha las ansiedades de sus contemporáneos sobre la degeneración física humana y su fascinación dominante con los deportes, la forma física y el rendimiento físico. Al mismo tiempo, London también usa su novela para abordar directamente la degeneración ambiental, valorizando las prácticas agrarias de principios del siglo XX diseñadas para regenerar la agricultura estadounidense y establecer la sociedad estadounidense en su conjunto sobre una base más ecológica. Creo que The Valley of the Moon merece interés ecocrítico, porque London utiliza el atletismo como una plantilla para pensar en las formas de “entrenamiento natural” que los humanos deben adoptar si desean evolucionar en gerentes responsables tanto de sus propios cuerpos como del entorno natural.
How Communicative Performances Can Constitute an Organization’s Self
Authors: Hildwein Fabien
Published: March 2020

The creation of an organization’s self is the attribution of a collective will and agency to a group of individuals, thereby constituting them into an organization able to interact with its peers. As such, the organization’s self represents a central issue for collective action, as studied through the prism of the “communicative constitution of organizing” (CCO). Performances, as communicative and spectacular events during which a collectivity presents its self and displays a given message, represent a little-studied opportunity to understand the constitution of the organization’s self, and to explore the links between the organization’s self and the selves of its members. The empirical part of this study analyses the French feminist activist group, La Barbe, which uses innovative performances to denounce the absence of women at the top of organizations. The paper’s contribution is twofold: the analysis presents how visual and symbolic performances can help to constitute an organization’s self, notably through what performances produce for the organization: visibility, coordination and mobilization. Second, it shows the impact of performances on those who execute them, which retroactively has important organizational effects by ensuring their engagement in the organization.
Living the PhD journey
Authors: Authors Multiple
Published: March 2020

No abstract available.
PENGARUH FINANSIAL, AKTIFITAS DANKENAKALAN TERHADAP DAYA KREATIFITAS REMAJA
Authors: Feranita Nungky Viana
Published: March 2020

Perekonomian rumah tangga dapat diidentikkan dengan kesejahteraan, yang memberikan tingkatan fasilitas terhadap anggota rumah tangga. Mengatasi permasalahan hidup yang serba kekurangan maka manusia harus berusaha membuka kreatifitas untuk mencari bagaimana dapat menghasilkan uang. Sesuai pepatah waktu sama dengan uang, maka manusia yang punya aktifitas tinggi pasti punya daya kreatifitas untuk segera menyelesaikan semua pekerjaannya. Anak nakal selalu berkelit bila dituduh negatif, bila terjepit pasti punya ide untuk terbebas dari masalah. Hasil penelitian mengatakan bahwa semakin meningkat kesulitan remaja dalam finansial, semakin aktif perilaku remaja dan semakin nakal remaja tersebut maka semakin tinggi daya kreatifitasnya.
PERPUTARAN PIUTANG DAN PENGARUHNYA TERHADAP MODAL KERJA
Authors: Wahyudi Koko Denik
Published: March 2020

Penelitian ini dilakukan untuk mengetahui pengaruh perputaran piutang terhadap modal kerja. Penelitian ini dilakukan terhadap laporan keuangan PT Tempo Scan Pasific Jakarta yang  diambil dari www.idx.co.id, dan www.ecfin.co.id. Data diambil dengan menggunakan total sampling (sensus) maksudnya adalah yang dijadikan sampel adalah seluruh jumlah populasi yaitu laporan keuangan PT. Tempo Scan Pasific tahun 1997– 2013. Analisis data yang dilakukan melalui berbagai uji antara lain (1)  Uji Asumsi Klasik, yang meliputi uji normalitas dan uji auto korelasi, (2) Uji Korelasi, (3) Uji Regresi, dan (4) Uji Hipotesis.Hasil penelitian menunjukan bahwa tidak ada pengaruh antara perputaran piutang dan modal kerja PT. Tempo Scan Pasific, Tbk. Hal ini terjadi karena struktur keuangan yang ada  di PT. Tempo Scan Pasific, Tbk dimana nilai piutang sangat kecil bila dinbandingkan dengan akun-akun yang lainnya, seperti kas persediaan dan aktiva lancar lainnya.
KEPEMIMPINAN TERHADAP INOVASI DAN KINERJA UKM (Sebuah Naskah Konseptual)
Authors: Feranita Nungky Viana
Published: March 2020

Tujuan dari makalah ini adalah untuk mengeksplorasi isu-isu terkait dalam hubungan antara kepemimpinan dan inovasi UKM. Makalah ini juga membahas hubungan antara kepemimpinan dan kinerja UKM. Kerangka konseptual melakukan tinjauan secara menyeluruh dari literatur yang relevan sebelum mengembangkan proposisi mengenai pengaruh kepemimpinan terhadap inovasi dan kinerja UKM. Makalah ini mengantisipasi bahwa kepemimpinan akan mendukung inovasi dan kinerja UKM. Penelitian di masa depan harus dilakukan untuk melakukan analisis empiris untuk memvalidasi dan/atau memodifikasi proposisi yang disajikan dalam makalah ini.
PENGARUH KUALITAS PRODUK DAN HARGA TERHADAP LOYALITAS KONSUMEN PADA PERCETAKAN UD. PRISMA JEMBER
Authors: Setiono Sovia Anggraini , Holili Ahmad
Published: March 2020

Penelitian ini bertujuan untuk mengetahui pengaruh kualitas produk dan harga terhadap loyalitas konsumen. Penelitian ini dilakukan di Percetakan UD. PRISMA Jember. Metode pengumpulan data pada penelitian ini dengan kuesioner yang menggunakan teknik Sampling Jenuh, dengan sampel sebanyak 68 responden. Analisis yang digunakan dalam penelitian ini adalah analisis kuantitatif meliputi uji data dengan uji validitas, uji reabilitas dan uji asumsi klasik, analisis data dengan uji determinasi, uji koefisien dan ujikorelasi, lalu uji hipotesis dengan uji F dan uji t. Hasil penelitian ini menunjukkan bahwa secara simultan (uji F) nilai Fhitung lebih besar dari nilai Ftabel (9,132 > 3,14), dan nilai signifikansi (sig) = 0,000 yang lebih kecil dari nilai α = 0,05. Hasil ini menunjukkan bahwa secara simultan kualitas produk dan harga berpengaruh signifikan terhadap loyalitas konsumen. Secara parsial (uji t) kualitas produk menunjukan nilai thitung lebih besar dari nilai ttabel (3,375 >1.6675) dan nilai signifikasi 0,001 < 0,05. Hasil ini menunjukkan bahwa secara parsial kualitas produk berpengaruh signifikan terhadap loyalitas konsumen. Serta harga menunjukkan nilai thitung lebih besar dari nilai ttabel (1,749 >1.6675) dan nilai signifikasi 0,005 < 0,05. Hasil ini menunjukkan bahwa secara parsial harga berpengaruh signifikan terhadap loyalitas konsumen. Hasil analisis menggunakan uji determinasi diketahui bahwa 19,5% variabel loyalitas konsumen dapat dipengaruhi oleh variasi dari variabel kualitas produk dan harga, sedangkan 80,5% dipengaruhi oleh variabel lain yang tidak diteliti dalam penelitian ini.
PENGARUH KEPEMIMPINAN SUPPORTIF TERHADAP KINERJA PEGAWAI DI KANTOR KELURAHAN SEMPUSARI KECAMATAN KALIWATES KABUPATEN JEMBER
Authors: Supriyadi Ibnu , Adi Roby Prasetyo
Published: March 2020

Penelitian ini bertujuan untuk mengetahui sejauhmana kepemimpinan supportif berpengaruh terhadap kinerja pegawai di Kantor Kelurahan Sempusari Kecamatan Kaliwates Kabupaten Jember. Populasi dalam penelitian ini adalah seluruh pegawai di Kantor Kelurahan Sempusari yang berjumlah 14 orang, sedangkan sampel yang diambil adalah sebanyak 14 orang dengan menggunakan metode sampling jenuh. Instrumen yang digunakan dalam penelitian ini adalah kuesioner, yang disusun menggunakan skala likert. Metode penelitian yang dipakai adalah metode non-parametrik. Hasil penelitian ini menunjukan ada pengaruh nyata kepemimpinan supportif terhadap kinerja pegawai di Kantor Kelurahan Sempusari Kecamatan Kaliwates Kabupaten Jember. Hal ini dibuktikan dengan hasil uji Regresi Sederhana yaitu t-hitung (3,594) > t-tabel (1,761). Yang berarti hipotesis nihil (H0) ditolak dan hipotesis alternatif (Ha) diterima.
PENGARUH EVALUASI KEBIJAKAN PENDAMPINGAN PENGELOLAAN KEUANGAN DESA DAN KOMPENSASI TERHADAP KINERJA TENAGA FASILITASI PENDAMPING DESA DI KABUPATEN LUMAJANG
Authors: Hadi Enny Roseita , Murdyastuti Anastasia , Puspitaningtyas Zarah
Published: March 2020

Kinerja pegawai atau kinerja individu merupakan aspek yang berperan penting dalam keberhasilan dan kemajuan organisasi. Pencapain kinerja yang optimal dipengaruhi oleh beberapa aspek, diantaranya adalah evaluasi kebijakan dan kompensasi. Penelitian ini bertujuan untuk mengetahui dan menganalisis pengaruh evaluasi kebijakan pendampingan pengelolaan keuangan desa dan kompensasi terhadap kinerja tenaga fasilitasi pendamping desa di Kabupaten Lumajang, baik secara simultan maupun parsial dengan menggunakan teori kinerja dari Rummler, teori evaluasi kebijakan dari Dunn, serta teori kompensasi dari Sinambela. Penelitian ini menggunakan jenis penelitian survei kausalitas dengan pendekatan kuantitatif. Populasi berjumlah 222 pendamping desa dengan teknik pengambilan sampel menggunkan teknik Slovin dengan perkiraan taraf kesalahan 5% dan diperoleh 143 pendamping desa sebagai responden penelitian. Teknik pengumpulan data menggunakan kuesioner, wawancara dan observasi nonpartisipan. Teknik analisis data yang digunakan adalah analisis regresi linear berganda. Hasil uji regresi menunjukkan bahwa baik secara simultan maupun parsial variabel evaluasi kebijakan dan kompensasi berpengaruh positif dan signifikan terhadap kinerja. Berdasarkan hasil penelitian tersebut, hendaknya pemerintah Kabupaten Lumajang tetap  mempertahankan dan meningkatkan aspek-aspek yang berkaitan dengan evaluasi kebijakan dan kompensasi guna meningkatkan kinerja pendamping desa.
PENGARUH PENDAPATAN SUAMI, TINGKAT PENDIDIKAN, UMUR DAN KESEMPATAN KERJA TERHADAP JUMLAH JAM KERJA BURUH WANITA PADA GUDANG TEMBAKAU “GMIT” JEMBER
Authors: Setiono Sovia Anggraini , Prabawati Achadyah
Published: March 2020

Penelitian ini bertujuan untuk mengetahui dan mennguji pengaruh yang signifikan variabel pendapatan keluarga, tingkat pendidikan, umur dan kesempatan kerja terhadap jumlah jam kerja buruh wanita pada Gudang Tembakau “GMIT” Jember. Metode penelitian yang dilakukan adalah deskriptif kuantitatif dengan penentuan responden secara purposive sampling yang berjumlah 58 orang.Hasil penelitian menunjukkan bahwa berdasarkan perhitungan uji regresi diperoleh bahwa variabel pendapatan suami berpengaruh signifikan terhadap jumlah jam kerja sebesar 0,837. Tingkat pendidikan berpengaruh signifikan terhadap jumlah jam kerja sebesar 0,016. Umur berpengaruh signifikan terhadap jumlah jam kerja sebesar 0.017. Kesempatan kerja berpengaruh signifikan terhadap jumlah jam kerja sebesar 0,024. Berdasarkan perhitungan tersebut diketahui bahwa variabel pendapatan suami memiliki pengaruh yang lebih dominan terhadap jumlah jam kerja buruh wanita pada Gudang Tembakau “GMIT” Jember.  Pengujian variabel independen yaitu pendapatan suami, tingkat pendidikan, umur dan kesempatan kerja secara bersama dapat menjelaskan jumlah jam kerja sebesar 0,802 atau 80,2%. Hal ini diperkuat dengan diperolehnya nilai Fhitung yang signifikan yaitu sebesar 31,029.   Kata Kunci: Pendapatan Suami, Tingkat Pendidikan, Umur, Kesempatan Kerja
IMPLEMENTASI PERATURAN DAERAH KABUPATEN JEMBER NOMOR 6 TAHUN 2008 TENTANG PEDAGANG KAKI LIMA
Authors: Darmaningsih Rahmawati , Patriadi Himawan Bayu , Wahyudi Edy
Published: March 2020

Tulisan ini membahas tentang administrasi publik khususnya tentang implementasi kebijakan publik. Kasus yang akan diteliti adalah permasalahan Pedagang Kaki Lima.Jenis penelitian yang dilakukan adalah kualitatif. Metode kualitatif digunakan dengan pertimbangan bahwa peneliti bermaksud untuk mendeskripsikan atau memperoleh gambaran secara leluasa tentang  Implementasi Peraturan  Daerah  Kabupaten Jember  Nomor  6  Tahun  2008. Lokasi penelitian di Kabupaten Jember tepatnya  tiga kecamatan kota yaitu Kecamatan Kaliwates, Kecamatan Sumbersari, dan Kecamatan Patrang. Implementasi Peraturan Daerah Kabupaten Jember Nomor 6 Tahun 2008 tentang Pedagang Kaki Lima dikatakan kurang berhasil, karena masih ada pedagang kaki lima yang kembali ketempat semula setelah direlokasi ataupun mereka tidak mau pindah secara sukarela meskipun sudah disediakan tempat relokasinya sehingga memaksa aparatSatuan Polisi  Pamong PrajabesertaTim Penataan pedagang kaki limamengambil langkah represif. Penyebab terjadinya hal tersebut adalah belum tersedianya tempat relokasi dengan segala aksesnya, yang menjaditanggung jawab Dinas Cipta Karya dan Tata Ruang, dan belum diadakan pelatihan-pelatihan kepada pedagang kaki lima agar dagangan mereka lebih menarik tampilan maupun rasanya, ini menjadi tanggung jawab Dinas Perindustrian dan Perdagangan.Tulisan ini membahas tentang administrasi publik khususnya tentang implementasi kebijakan publik. Kasus yang akan diteliti adalah permasalahan Pedagang Kaki Lima.Jenis penelitian yang dilakukan adalah kualitatif. Metode kualitatif digunakan dengan pertimbangan bahwa peneliti bermaksud untuk mendeskripsikan atau memperoleh gambaran secara leluasa tentang  Implementasi Peraturan  Daerah  Kabupaten Jember  Nomor  6  Tahun  2008. Lokasi penelitian di Kabupaten Jember tepatnya  tiga kecamatan kota yaitu Kecamatan Kaliwates, Kecamatan Sumbersari, dan Kecamatan Patrang. Implementasi Peraturan Daerah Kabupaten Jember Nomor 6 Tahun 2008 tentang Pedagang Kaki Lima dikatakan kurang berhasil, karena masih ada pedagang kaki lima yang kembali ketempat semula setelah direlokasi ataupun mereka tidak mau pindah secara sukarela meskipun sudah disediakan tempat relokasinya sehingga memaksa aparatSatuan Polisi  Pamong PrajabesertaTim Penataan pedagang kaki limamengambil langkah represif.Penyebab terjadinya hal tersebut adalah belum tersedianya tempat relokasi dengan segala aksesnya, yang menjaditanggung jawab Dinas Cipta Karya dan Tata Ruang, dan belum diadakan pelatihan-pelatihan kepada pedagang kaki lima agar dagangan mereka lebih menarik tampilan maupun rasanya, ini menjadi tanggung jawab Dinas Perindustrian dan Perdagangan.
Fuzzy-Neural Petri Net Distributed Control System Using Hybrid Wireless Sensor Network and CAN Fieldbus
Authors: Abed Ali , Ali Abduladhem , Aslam Nauman , Marhoon Ali
Published: March 2020

The reluctance of industry to allow wireless paths to be incorporated in process control loops has limited the potential applications and benefits of wireless systems. The challenge is to maintain the performance of a control loop, which is degraded by slow data rates and delays in a wireless path. To overcome these challenges, this paper presents an application–level design for a wireless sensor/actuator network (WSAN) based on the “automated architecture”. The resulting WSAN system is used in the developing of a wireless distributed control system (WDCS). The implementation of our wireless system involves the building of a wireless sensor network (WSN) for data acquisition and controller area network (CAN) protocol fieldbus system for plant actuation. The sensor/actuator system is controlled by an intelligent digital control algorithm that involves a controller developed with velocity PID-like Fuzzy Neural Petri Net (FNPN) system. This control system satisfies two important real-time requirements: bumpless transfer and anti-windup, which are needed when manual/auto operating aspect is adopted in the system. The intelligent controller is learned by a learning algorithm based on back-propagation. The concept of petri net is used in the development of FNN to get a correlation between the error at the input of the controller and the number of rules of the fuzzy-neural controller leading to a reduction in the number of active rules. The resultant controller is called robust fuzzy neural petri net (RFNPN) controller which is created as a software model developed with MATLAB. The developed concepts were evaluated through simulations as well validated by real-time experiments that used a plant system with a water bath to satisfy a temperature control. The effect of disturbance is also studied to prove the system's robustness.
Numerical Analysis of Thermal Dependence of the Spectral Response of Polymer Optical Fiber Bragg Gratings
Authors: Hisham Hisham
Published: March 2020

The thermal dependence of the spectral response (i.e. transmission, reflection and time delay ( r) responses) of uniform polymer optical fiber (POF) Bragg gratings has been investigated. In addition to the temperature dependence, the effects of grating strength (kLg) and fiber index modulation ( n) have been investigated. Besides high capability of tunable wavelength due to the unique large and negative thermo-optic coefficient of POF, the spectral response for POF Bragg gratings show high stability and larger spectrum bandwidth with temperature variation compare with the silica optical fiber (SOF) Bragg gratings, especially with the increase of the kLg value. It was found that by increasing kLg, the peak reflectance value increases and the bandwidth of the Bragg reflector become narrower. Also it’s shown by increasing the kLg value, r deceasing significantly and reach its minimum value at the designed wavelength ( B). Furthermore, the r for POF Bragg gratings is less than that for SOF Bragg gratings at the same value of kLg. Also it’s found that the peak reflectivity value increases to around 60% when the n value increases from 1*10-4 to 5*10-4.
Obesity and child overweight
Authors: Arzube Almeida Michelle Nathaly , Espinosa Arreaga Gabriela Belén
Published: March 2020

This document, “Overweight and childhood obesity. It is to guide, prevent, to see treatment in Health Care”, in adequate nutrition for children in childhood as support for the care of overweight or obese children, as well as for guidance of community actions to promote health as a warning strategy of overweight and obesity. Obesity and childhood overweight is a major international problem that has grown in the last decades. Some of the causes it causes are inappropriate uses of food and sedentary lifestyle. The common purpose of this research is to know what the causes of childhood obesity are and overweight and look for educational proposals to reduce childhood obesity.
Temporomandibular Joint analysis in patients with Temporomandibular Dysfunction
Authors: Ortiz Barcia Roberto Octavio , Jorge Eduardo Barona Terán
Published: March 2020

The disk displacement (DD) is a TMJ internal alteration that accompanies temporomandibular disorders, being found in up to 55% of the population. This can be defined as the anomalous relationship of the disc with the bone structures of the TMJ causing a Temporomandibular Dysfunction (TMD), that is, incoordination between the disc and the condyle. Objective: Establish specific characteristics of  Tmj structures as a predisposing factors for Temporomandibular disorders. Materials y Methods: A cross-sectional and observational study was conducted in which 45 MRI magnetic resonances were analyzed, meaning 90 joints, which were found in the Imaging Diagnostic Department database of the Omni Hospital. Its analysis was carried out under different methods accordind the structure studied.Results: The most prevalent disk displacement was slight in 48.89%. The greatest inclination of joint eminence occurred in 85.71% of moderate DD in men and in 55.56% of severe DD in women. The posterior condylar position was found in 100% severe DD. Sigmoid type morphology occurred in 52.22%, being more prevalent in severe DD in 66.67%. The folded disk morphology was found in moderate DD and severe DD in 52.38% and 33.33%. Finally, vertical condylar asymmetry occurred in 55,56% of the patients analyzed. Conclusion: It was concluded that certain characteristics are more prevalent than others that could alert us the presence of disk displacement and its severity as the posterior condylar position and the articular eminence morphology.
The Dark Planets of the WASP-47 Planetary System
Authors: Kane Stephen R. , Fetherolf Tara , Hill Michelle L.
Published: March 2020

Exoplanet discoveries have demonstrated a vast range of planetary system architectures. The demographic of compact planetary systems are especially interesting from the perspective of planetary formation and the evolution of orbital dynamics. Another interesting demographic is that of giant planets in eccentric orbits, since these planets have likely had a dynamical history involving planet–planet scattering events. The WASP-47 system is particularly fascinating since it combines these two demographics, having both compact planetary orbits and a giant planet on an eccentric orbit within the system the habitable zone. Here we provide an analysis of the WASP-47 system from the perspective of atmospheric detection and characterization. We discuss the system architecture and the potential for additional long-period planets. We simulate expected phase variations as a function of planet orbital phase for the system due to the combined effect of the planets. We present an analysis of precision photometry of WASP-47 from the K2 mission, phased on each of the planets. The analysis rules out the detection of phase signatures for the two inner-most planets, enabling constraints upon their albedos and atmospheric properties. Our study concludes that WASP-47b is an example of a “dark” planet with a tentative geometric albedo of 0.016 and a 1σ upper limit of 0.17. The WASP-47e data are consistent with a broad range of albedos, but also show early evidence of having a relatively low albedo. The growing number of dark, short-period giant planets provide the framework of an ideal sample for studying low albedo dependence on atmospheric composition.
A Model for the Onset of Self-gravitation and Star Formation in Molecular Gas Governed by Galactic Forces. II. The Bottleneck to Collapse Set by Cloud–Environment Decoupling
Authors: Meidt Sharon E. , Glover Simon C. O. , Kruijssen J. M. Diederik , Leroy Adam K. , Rosolowsky Erik , Hughes Annie , Schinnerer Eva , Schruba Andreas , Usero Antonio , Bigiel Frank , Blanc Guillermo , Chevance Mélanie , Pety Jerome , Querejeta Miguel , Utomo Dyas
Published: March 2020

In Meidt et al., we showed that gas kinematics on the scale of individual molecular clouds are not entirely dominated by self-gravity but also track a component that originates with orbital motion in the potential of the host galaxy. This agrees with observed cloud line widths, which show systematic variations from virial motions with environment, pointing at the influence of the galaxy potential. In this paper, we hypothesize that these motions act to slow down the collapse of gas and so help regulate star formation. Extending the results of Meidt et al., we derive a dynamical collapse timescale that approaches the free-fall time only once the gas has fully decoupled from the galactic potential. Using this timescale, we make predictions for how the fraction of free-falling, strongly self-gravitating gas varies throughout the disks of star-forming galaxies. We also use this collapse timescale to predict variations in the molecular gas star formation efficiency, which is lowered from a maximum, feedback-regulated level in the presence of strong coupling to the galactic potential. Our model implies that gas can only decouple from the galaxy to collapse and efficiently form stars deep within clouds. We show that this naturally explains the observed drop in star formation rate per unit gas mass in the Milky Way’s Central Molecular Zone and other galaxy centers. The model for a galactic bottleneck to star formation also agrees well with resolved observations of dense gas and star formation in galaxy disks and the properties of local clouds.
Using Data Imputation for Signal Separation in High-contrast Imaging
Authors: Ren 任 Bin 彬 , Pueyo Laurent , Chen Christine , Choquet Élodie , Debes John H. , Duchêne Gaspard , Ménard François , Perrin Marshall D.
Published: March 2020

To characterize circumstellar systems in high-contrast imaging, the fundamental step is to construct a best point-spread function (PSF) template for the noncircumstellar signals (i.e., starlight and speckles) and separate it from the observation. With existing PSF construction methods, the circumstellar signals (e.g., planets, circumstellar disks) are unavoidably altered by overfitting and/or self-subtraction, making forward modeling a necessity to recover these signals. We present a forward modeling–free solution to these problems with data imputation using sequential nonnegative matrix factorization (DI-sNMF), which first converts this signal separation problem to a “missing data” problem in statistics by flagging the regions that host circumstellar signals as missing data, then attributes PSF signals to these regions. We mathematically prove it to have negligible alteration to circumstellar signals when the imputation region is relatively small, which thus enables precise measurement of these circumstellar objects. We apply it to simulated point-source and circumstellar disk observations to demonstrate its proper recovery of them. We apply it to Gemini Planet Imager K1-band observations of the debris disk surrounding HR 4796A, finding a tentative trend that the dust is more forward scattering as the wavelength increases. We expect DI-sNMF to be applicable to other general scenarios where the separation of signals is needed.
Black Hole Parameter Estimation from Its Shadow
Authors: Kumar Rahul , Ghosh Sushant G.
Published: March 2020

The Event Horizon Telescope (EHT), a global submillimeter wavelength very long baseline interferometry array, unveiled event-horizon–scale images of the supermassive black hole M87* as an asymmetric bright emission ring with a diameter of 42 ± 3 μas, and it is consistent with the shadow of a Kerr black hole of general relativity. A Kerr black hole is also a solution of some alternative theories of gravity, while several modified theories of gravity admit non-Kerr black holes. While earlier estimates for the M87* black hole mass, depending on the method used, fall in the range

, the EHT data indicated a mass for the M87* black hole of (6.5 ± 0.7) × 109
M
⊙. This offers another promising tool to estimate black hole parameters and to probe theories of gravity in its most extreme region near the event horizon. The important question arises: Is it possible by a simple technique to estimate black hole parameters from its shadow, for arbitrary models? In this paper, we present observables, expressed in terms of ordinary integrals, characterizing a haphazard shadow shape to estimate the parameters associated with black holes, and then illustrate its relevance to four different models: Kerr, Kerr–Newman, and two rotating regular models. Our method is robust, accurate, and consistent with the results obtained from existing formalism, and it is applicable to more general shadow shapes that may not be circular due to noisy data.
The Turbulent Stress Spectrum in the Inertial and Subinertial Ranges
Authors: Brandenburg Axel , Boldyrev Stanislav
Published: March 2020

For velocity and magnetic fields, the turbulent pressure and, more generally, the squared fields such as the components of the turbulent stress tensor, play important roles in astrophysics. For both one and three dimensions, we derive the equations relating the energy spectra of the fields to the spectra of their squares. We solve the resulting integrals numerically and show that for turbulent energy spectra of Kolmogorov type, the spectral slope of the stress spectrum is also of Kolmogorov type. For shallower turbulence spectra, the slope of the stress spectrum quickly approaches that of white noise, regardless of how blue the spectrum of the field is. For fully helical fields, the stress spectrum is elevated by about a factor of two in the subinertial range, while that in the inertial range remains unchanged. We discuss possible implications for understanding the spectrum of primordial gravitational waves from causally generated magnetic fields during cosmological phase transitions in the early universe. We also discuss potential diagnostic applications to the interstellar medium, where polarization and scintillation measurements characterize the square of the magnetic field.
Variable Accretion onto Protoplanet Host Star PDS 70
Authors: Thanathibodee Thanawuth , Molina Brandon , Calvet Nuria , Serna Javier , Bae Jaehan , Reynolds Mark , Hernández Jesús , Muzerolle James , Hernández Ramiro Franco
Published: March 2020

The PDS 70 system has been subject to many studies in the past year following the discovery of two accreting planets in the gap of its circumstellar disk. Nevertheless, the mass accretion rate onto the star is still not well known. Here, we determined the stellar mass accretion rate and its variability based on Transiting Exoplanet Survey Satellite and High-Accuracy Radial velocity Planetary Searcher (HARPS) observations. The stellar light curve shows a strong signal with a 3.03 ± 0.06 days period, which we attribute to stellar rotation. Our analysis of the HARPS spectra shows a rotational velocity of

, indicating that the inclination of the rotation axis is 50° ± 8°. This implies that the rotation axes of the star and its circumstellar disk are parallel within the measurement error. We apply magnetospheric accretion models to fit the profiles of the Hα line and derive mass accretion rates onto the star in the range of

, varying over the rotation phase. The measured accretion rates are in agreement with those estimated from near-UV fluxes using accretion shock models. The derived accretion rates are higher than expected from the disk mass and planets’ properties for the low values of the viscous parameter α suggested by recent studies, potentially pointing to an additional mass reservoir in the inner disk to feed the accretion, such as a dead zone. We find that the He I λ10830 line shows a blueshifted absorption feature, indicative of a wind. The mass-loss rate estimated from the line depth is consistent with an accretion-driven inner disk MHD wind.
Cystic Echinococcosis of the Breast - Diagnostic Dilemma or just a Rare Primary Localization
Authors: Mutafchiyski Ventsislav M. , Popivanov Georgi I. , Tabakov Mihail S. , Vasilev Vladimir V. , Kjossev Kirien Ts. , Cirocchi Roberto , Philipov Anthony T. , Vaseva Virsavia S. , Baitchev Georgi T. , Ribarov Racho , Konaktchieva Marina N.
Published: March 2020

Introduction: Although the liver and lung are the most frequently affected organs in cystic echinococcosis, the cysts may develop in any viscera and tissues. Breast is a rare primary localization with few cases described in the literature. We present an updated and systematic review and discuss the possible mechanisms of spreading, diagnostic and treatment options.Materials and methods: We performed a literature search in PUBMED using the key words ‘hydatid disease’, ‘cystic echinococcosis’ and ‘breast echinococcosis’ without time limitation. Only studies reporting breast cystic echinococcosis were included.Results: Overall, 121 cases with cystic echinococcosis and 2 with alveolar echinococcosis were reported. A total of 52 cases were included in the analysis. The mean size of cysts was 5.5 cm (range 1.7-12). The most common clinical presentation was painless lump presented from 4 months to 19 years before the final diagnosis. Most cases had isolated breast CE, few cases had synchronous localizations – femoral, thigh and lung, and previous liver CE. Most were active CL and CE1-2 cysts (72%). Ultrasound was used in 83%, followed by mammography (35%). Fine needle aspiration was reported in 27 cases with positive finding in 59%.Conclusions: In cases with cystic breast lesions from endemic regions we recommend the US as a gold standard. CT and MRT are more accurate but expensive tools without the potential to change the surgical tactic. In contrast to the other localizations of CE, complete excision of the cysts is the best diagnostic and treatment approach.
Correlation of Disease Activity and Quality of Life of Patients with Psoriasis after Narrow-band Ultraviolet B Therapy
Authors: Dourmishev Lyubomir A. , Lyubomirova Karolina
Published: March 2020

Introduction: Treatment with ultraviolet light is a well-established and effective treatment option for mild to moderate psoriasis. The aims of the study were to measure the psoriasis area and severity index (PASI) reduction after narrow-band ultraviolet B (NB UVB) therapy, to evaluate the quality of life before and after treatment using the dermatology life quality index (DLQI), and to compare the clinical effectiveness with quality of life improvement.

 

Material and methods: Twenty two patients (13 male and 9 female patients), aged between 21 to 70 years (mean age 40±14.65 years) were enrolled in the study. NB UVB treatment was performed with 10 to 25 (mean 18.5; SD 3.39) procedures with cumulative doses of 5 to 19.4 J/cm2. The baseline median PASI score was 20.027 which decreased after therapy to 11.11. More than PASI 50% reduction was achieved in 40.91% of the patients after at least 6 weeks of treatment and the results are highly statistically significant. Quality of life (QoL) assessed using DLQI was found moderately affected by disease pretreatment. NB UVB therapy significantly increased DLQI score in spectrum of ‘symptoms and feelings’ and ‘treatment’.

 

Discussion: The PASI score reduction that we observed after NB-UVB therapy is consistent with the results reported by other authors. Baseline DLQI scores were indicative of moderate QoL impairments associated with disease. At the same time, the reduction of the DLQI index corresponding to improved QoL correlated with the objective clinical symptom assessment. 

 

Conclusion: Our data suggest that DLQI and PASI indexes are important complementary methods for comprehensive health assessment of patients with psoriasis. 
Se salir les mains pour les autres. Métiers de femme et division morale du travail
Authors: Avril Christelle , Ramos Vacca Irene
Published: March 2020

Qu’est-ce qu’un « métier de femme » ? Cet article permet d’enrichir la réponse féministe à cette question à partir d’un angle négligé de l’approche du sale boulot d’Everett Hughes, celui concernant les rôles dans la division morale du travail. À partir de trois enquêtes, l’une sur les aides à domicile, la deuxième sur les aides-soignantes et infirmières en pédiatrie et la troisième sur les secrétaires hospitalières, il montre qu’un « métier de femme » se définit moins par la licence spécifique de faire certaines tâches que par le fait de faire ce qu’il reste à faire. Si les femmes peuvent vivre cette délégation positivement lorsqu’il s’agit d’endosser de « bons rôles », cela est moins vrai lorsqu’elles doivent se salir les mains pour les autres. Elles assument en effet de « mauvais rôles » en déchargeant les catégories supérieures des tâches peu morales et voire immorales. Cet article contribue à saisir les liens entre division sexuelle des rôles et construction des positions de pouvoir et de prestige.
A stochastic programming model of vaccine preparation and administration for seasonal influenza interventions
Authors: Chen Sheng-I ,   Department of Industrial Engineering and Management, National Chiao-Tung University, 1001University Road, HsinChu, 30010, Taiwan, Wu Chia-Yuan
Published: March 2020

This study considers the integration of vaccine preparation and administration decisions for seasonal influenza interventions. We examine actual vaccination activities of sharing multiple vaccine products and supplementary vaccinations. A two-stage stochastic program is formulated to determine the optimal ordering and allocation of vaccines under uncertain attack rates, vaccine efficacies, and demands. We present an algorithm based on the sample average approximation and warm-start solution to solve the stochastic integer program with continuous random variables. Furthermore, the optimal solution for the deterministic model using the expected value is analyzed and obtained directly. Our analysis compares the deterministic and stochastic solutions to assess the impact of uncertainties on the immunization outcomes and costs. The result shows that the stochastic programming model provides a more robust solution than the deterministic model, and uncertain characteristics should consider when making public health decisions.
Effect of Alloy Elements in Time Temperature Transformation Diagrams of Railway Wheels
Authors: Rezende A.B. , Fernandes F.M. , Fonseca S.T. , Farina P.F.S. , Goldenstein H. , Mei Paulo Roberto
Published: March 2020

The Heavy-Haul railroad wheels started to use higher wear resistance steels microalloyed with niobium, vanadium, and molybdenum [1]. During continuous cooling, these elements depress the temperature of the pearlite formation, producing smaller interlamellar spacing that increases the hardness of the steel, besides to favor the precipitation hardening through the formation of carbides [2, 3]. Also, they delay the formation of difusional components like pearlite and bainite during isothermal transformation. The effects of these alloy elements on microstructure during isothermal transformation were studied in this work using a Bähr 805A/D dilatometer. Three different compositions of class C railway wheels steels (two microalloyed and one, non microalloyed) were analyzed in temperatures between 200 and 700 °C. The microstructure and hardness for each isothermal treatment were obtained after the experiments. Comparing with non microalloyed steel (7C), the vanadium addition (7V steel) did not affect the beginning of diffusion-controlled reactions (pearlite and bainite), but delayed the end of these reactions, and showed separated bays for pearlite and bainite. The Nb + Mo addition delayed the beginning and the ending of pearlite and bainite formation and also showed distinct bays for them. The delays in diffusion-controlled reactions were more intense in the 7NbMo steel than in 7V steel. The V or Nb + Mo additions decreased the start temperature for martensite formation and increased the start temperature for austenite formation.
Applying Phenomenological Lumped Models in Drying Process of Hollow Ceramic Materials
Authors: Barbosa de Lima Wanderson Magno Paiva , de Lima Elisiane Santana , Carmo de Lima Ana Raquel , de Oliveira Neto Guilherme Luiz , de Oliveira Nívea Gomes Nascimento , de Farias Neto S.R. , de Lima Antonio Gilson Barbosa
Published: March 2020

Drying is a complex process of coupledheat and mass transfer of wet porous material. Wet clay products when exposed to drying without control can suffer cracks and deformations, reducing its quality post-drying. Thus, this work aims to study the hollow ceramic materials drying with arbitrary shape using lumped models. Here, the exact solution of the governing equations were obtained using the method of separation of variables. Results of the average moisture constant and temperature of the material along the process are presented and analyzed. It was observed that the moisture loss process occurs at a lower speed than the heating of the ceramic material because its thermal diffusivity is greater than the mass diffusivity and that the area/volume relationship strongly affects the heat and mass transfer of the material.
X-Band Electromagnetic Characterization of Fe72Al23V5 Based Nanocomposites
Authors: Otmane Fadhéla , Hamlati Zineb , Rekioua B. , Maali A. , Azzaz Mohammed
Published: March 2020

Determination of the electromagnetic parameters is an important tool to evaluate the microwave-absorbing characteristic of a novel material. In this context, our research was carried out to investigate the electromagnetic parameters of nanocomposites samples obtained by inclusion of nanostructured Fe72Al23V5 powders in a resin matrix. Nanostructured Fe72Al23V5 powders were synthesized by high-energy mechanical alloying (MA) route and characterized using a scanning electron microscopy (SEM). The nanostructured Fe72Al23V5 powders were dispersed in an epoxy resin matrix. Nanocomposites bulk samples of rectangular section and given thickness were shaped for electromagnetic characterization in an X-band metallic rectangular waveguide. Electromagnetic characterization was performed in terms of measured Sij scattering parameters. Dielectric permittivity and magnetic permeability spectra were extracted over the microwave X-band via the transmission/reflection technique. Obtained results exhibit how the nature and size of the inclusions affect the electromagnetic parameters in the X-band frequencies.
Effect of Catalyst Synthesis Parameters on the Performance of CO2 Hydrogenation to Methanol over SBA-15 Supported Cu/ZnO-Based Catalysts
Authors: Tasfy Sara F.H. , Zabidi Noor Asmawati Mohd , Shaharun Maizatul Shima , Subbarao Duvvria
Published: March 2020

Bimetallic Cu-ZnO-based catalyst were systematically prepared via impregnation technique under controlled synthesis conditions of active metal loading, ratio of active metal Cu:Zn and synthesis pH. The effect of the synthesis condition on the performance of the Cu-ZnO supported catalysts with respect to the hydrogenation of CO2 to methanol in micro-activity fixed-bed reactor at 250°C, 2.25 MPa, and 75% H2/25%CO2 ratio. The synthesized catalysts were characterized by transmission electron microscopy (TEM) and temperature programmed desorption, reduction, oxidation and pulse chemisorption (TPDRO) and the surface area determination was also performed. The results demonstrate that the catalytic structure, activity, and methanol selectivity was strongly affected by the synthesis parameters. Increasing of synthesis pH from 1 to 7 shows better metal particles distribution, Cu desperation of 29%, higher BET surface area as well as Cu surface area, while further increasing on pH revealed on particles agglomeration and weak metal-support interaction. In addition, increasing of the active metal loading from 5 to 15 % resulted in dramatic increase in the conversion of CO2 and methanol production while further increase caused lower catalytic performance. Moreover, catalyst with total loading of 15%, Cu:Zn ratio of 70:30 synthesized at pH of 7 exhibit higher catalytic activity of 14%, methanol selectivity of 92%, and TOF of 1.24×103 s-1 compared with other catalyst prepared under various conditions