bluuebunny/crossref_metadata_2025 huggingface dataset:
Oryza sativa PULP AS A TEMPLATE IN α-ALUMINA NANOCRYSTALLINE SYNTHESIS BY PRECURSOR CALCINING PROCESS
Authors: Septawendar Rifki , Purwasasmita Bambang Sunendar , , Suhanda , Nurdiwijayanto Leanddas , Hidayat Taufan
Published: August 2017

Synthesis and characterization of α-alumina nano powder with Oryza sativa pulp as template by precursor calcining process have been successfully conducted. The aim of this experiment is to study the potential of Oryza sativa pulp as a template of precursor calcining process method that isrelatively cheaper than that of sol gel method in α-alumina synthesis. Weight ratio between precursor and Oryza sativa pulp was 1 : 2. The effect of calcination temperature on α-alumina synthesis in this research is set by variation of calcination temperature at 900°C, 1000°C, and 1100°C. In this research, X-Ray Diffraction (XRD) analysis is used to investigate the transformation of crystal phase, structure and size of the crystal formed by the calcinations temperature. Scanning Electron Microscope (SEM)characterization is used to identify morphology of α-Al2O3 powder. Based on XRD characterization result, synthesized alumina sample forms α-Al2O3 and γ-Al2O3 crystal phases. The formed crystallite size is in nanometer dimension for α-Al2O3 which biggest crystallite size is 46.6 nm. According to SEM characterization result, it is shown that α-Al2O3 formed rhombohedral or bar shape and planar. The particle size will increase along with the elevation of calcination temperature.Key words : nano powder, α-alumina, precursor calcining process, oryza sativa pulp ABSTRAKSintesis dan karakterisasi nanopowder α-alumina dengan menggunakan pulp merang sebagai template melalui proses kalsinasi prekursor telah berhasil dilakukan. Penelitian ini bertujuan untuk mempelajari potensi pulp merang sebagai template dari precursor calcination process yang merupakan metoda relatif lebih murah dibandingkan metode sol gel dalam mensintesis α-alumina. Perbandingan berat antara prekursor dan pulp adalah 1:2. Pengaruh temperatur kalsinasi terhadap pembentukan α-alumina ditetapkan dengan variasi temperatur kalsinasi pada 900°C, 1000°C, dan 1100°C. Analisis diffraksi Sinar-X (XRD) digunakan untuk mengetahui perubahan fasa kristal, struktur, dan ukuran kristal yangterbentuk pada suhu kalsinasi tersebut. Karakterisasi SEM dilaksanakan untuk mengetahui morfologi dari serbuk α-Al2O3. Berdasarkan karakterisasi XRD, sampel alumina yang disintesis membentuk fasa α-Al2O3 dan γ-Al 2O3. Ukuran kristal yang terbentuk berskala nanometer, yaitu untuk α-Al2O3 ukuran kristal terbesar adalah 46,6 nm. Hasil karakterisasi SEM, terlihat bahwa α-Al2O3 membentuk struktur trigonal atau bentuk batang dan planar, ukuran partikel akan semakin membesar dengan meningkatnyatemperatur kalsinasi.Kata kunci : nano powder, α-alumina, proses kalsinasi prekursor, pulp merang.
ANALISIS KINERJA KETAHANAN TEKAN LINGKAR SEBAGAI PARAMETER MUTU KERTAS LAINER DAN MEDIUM
Authors: Hidayat Taufan
Published: August 2017

There are some trends happen in relation to corrugating industries, namely the substitution of liner by fluting medium for certain corrugated container which do not need strength tightly. Due to the tremendous usage of this box type, the requirements of stacking strength (BCT) of the box neglected following by the ignoring of ring crush test (RCT) value for liner and medium. The RCT easily neglected due to the facts that this parameter do not successful to correlate well with the BCT. The results of testing analysis for a number of liner and medium samples coming from Indonesian paper mill supported these facts. The RCT is not a material property of liner and medium, the value depends on basis weight and manufacturing processes. Short-span Compression Test (SCT) was proven covering the weaknesses of RCT, therefore the SCT is proposed to replace the RCT.Keywords: RCT, SCT, material-property, liner, medium fluting  ABSTRAK Telah terjadi kecenderungan substitusi kertas lainer oleh kertas medium di industri kotak karton gelombang untuk keperluan tertentu yang tidak memerlukan kekuatan secara ketat. Tetapi karena penggunaan jenis kotak seperti ini sangat banyak, maka persyaratan ketahanan tumpuk (BCT) kotak menjadi terabaikan diikuti dengan terbaikannya nilai ketahanan tekan lingkar (RCT) lainer dan medium. Mudahnya RCT diabaikan karena fakta menunjukkan bahwa RCT tidak mampu memprediksi BCT dengan baik. Hasil analisis pengujian kertas lainer dan medium dari pabrik-pabrik di Indonesia mendukung fakta tersebut. RCT bukan karakter bahan lainer dan medium, nilainya sangat tergantung pada gramatur dan proses manufaktur. Sementara itu parameter SCT telah terbukti mampu mengatasi kekurangan RCT, maka diusulkan agar SCT menjadi parameter baru pengganti RCT.Kata kunci: RCT, SCT, karakter-bahan, lainer, medium
THE POTENTIAL OF NANOCELLULOSE FROM Acacia mangium PULP FOR SPECIALTY PAPER MAKING
Authors: Bahar Nursyamsu , Hidayat Taufan , Elyani Nina , Rostika Ike
Published: August 2017

The goals of this research is to use nanocellulose as an additive for reinforcing agent in papermaking for reducing the beating process and the amount of NBKP continue with applying to specialty paper. In this research, nanocellulose was created from Acacia mangium pulp in water using disc refiner and made them homogenized with ultra turrax and ultra sonic as homogenizer. Research had been conducted in three variations of particle sizes, five variations of nanocellulose concentrations and 2 two variations of pulp compositions. The nanocellulose was added to the stock of Leaf Bleach Kraft Pulp (LBKP) and Needle Bleach Kraft Pulp (NBKP) for sheet papermaking. The structure of nanocellulose was determined by XRD, SEM, TEM, and PSA. The physical property of paper was determined by TAPPI standard and SNI.. The result showed that smaller particle gave higher reinforcing effect. The addition of 2% of nanocellulose (70 nm) increased the elongation by 24% and TEA by 50% while porosity decreased by 50%. It showed that nanocellulose have great potential as reinforcing agent in papermaking. It can be used in specialty paper such as security paper which requires high strength and glassine paper, which needs low porosity to reserve its oil penetration and use for oily product packaging. Keywords: nanocellulose, Acacia mangium, reinforcing agent, specialty paper  ABSTRAKTujuan dari penelitian ini adalah menggunakan nanoselulosa sebagai additive untuk meningkatkan kekuatan pada pembuatan kertas serta mengurangi energi proses penggilingan dan penggunaan NBKP serta diaplikasikan untuk kertas khusus. Pada penelitian ini nanoselulosa dibuat dari pulp Acacia mangium dalam air menggunakan disc refiner dan di buat homogen dengan ultra turrax dan ultra sonic. Penelitian ini dilakukan dengan tiga variasi ukuran partikel, lima variasi konsentrasi nanoselulosa, dan dua variasi komposisi pulp. Nanoselulosa ditambahkan pada stok dari pulp kayudaun (LBKP) dan pulp kayujarum (NBKP) pada pembuatan lembaran kertas. Struktur nanoselulosa diuji dengan menggunakan XRD, SEM, TEM dan PSA serta kekuatan fisik kertas ditentukan dengan menggunakan standard TAPPI dan SNI. Hasil penelitian menunjukkan bahwa partikel dengan ukuran yang lebih kecil memberikan efek peningkatan kekuatan yang lebih tinggi. Penambahan 2% nanoselulosa (70 nm) meningkatkan elongation sebanyak 24% dan TEA 50% sedangkan porositas turun sebanyak 50%, Hal ini menunjukkan bahwa nanoselulosa dapat digunakan untuk pembuatan kertas khusus seperti kertas sekuritas yang memerlukan kekuatan yang tinggi dan kertas glasin yang memerlukan porositas yang rendah dan untuk menghindarkan dari penetrasi minyak dan digunakan untuk kemasan dari bahan yang berminyak.Kata kunci: nanoselulosa, Acacia mangium, reinforcing agent, kertas khusus
INFLUENCE OF FUNCTIONALIZED MULTI-WALLED CARBON NANOTUBES ON FILTERABILITY AND MECHANICAL PROPERTIES OF RAYON NANOCOMPOSITE FILAMENTS
Authors: Onggo Holia , Yudianti Rike , Ruchiat Endang
Published: August 2017

Carbon nanotube-rayon composite filaments was fabricated by spinning and coagulation of the mixture of 100mL functionalized carbon nanotube dispersion (containing 0.72 g FCNT) and cellulose xanthate in NaOH solution using viscose process. In the process, CNT was functionalized using mixture of acidic solution ( H2SO4/HNO3, 3:1 v/v). Influence of functionalized (FCNT) and non-functionalized carbon nanotubes (nFCNT) on the fabrication of rayon nanocomposite filament was studied. Physical and morphological properties of the nanocomposite filaments were characterized by single filament tenacity tester, photo micrograph, scanning electron microscope (SEM) and transmission electron microscope (TEM). Filterability and mechanical properties of FCNT-rayon nanocomposite filament greatly improved by reducing clogging constant from 1689 to 153 and increasing tenacity from 2.72 to 3.01 g/denier and decreasing elongation from 57.1 to 36.5% respectively compared with those of nFCNT-rayon nanocomposite filament.Keywords: functionalized multi-walled carbon nanotubes, nanocomposite filament, mechanical properties, filterability, dispersion  ABSTRAKRayon nanocomposite filaments telah dibuat melalui proses pemilinan (spinning) dan koagulasi (coagulation) dari campuran 100 mL larutan functionalized carbon nanotube dispersion (FCNT=0,72 g), selulosa santat dalam larutan NaOH melalui proses viskosa. CNT di functionalisasi (FCNT) menggunakan campuran larutan asam (H2SO4/HNO3, 3:1 v/v). Pengaruh fungsionalisasi CNT pada pembuatan rayon nanocomposite filaments dipelajari dengan cara membandingkannya dengan CNT tanpa fungsionalisasi (nFCNT). Sifat fisik dan morfologi dari rayon-nanocomposite filaments dikarakterisasi menggunakan tenacity tester, photo micrograph, scanning electron microscope (SEM) dan transmission electron microscope (TEM). Viskosa FCNT memiliki daya saring (Kw) cukup baik yaitu 155, sedangkan viskosa nFCNT  memiliki daya saring 1689 (tidak baik). Kekuatan mekanik dari FCNT-rayon nanocomposite filaments berturut turut adalah 3,01 g/denier (tenacity), dan 36,5% (elongation), lebih baik dibandingkan dengan nFCNT-rayon nanocomposite filament: 2,72 g/denier (tenacity) dan 57,1% (elongation).Kata kunci: fungsionalisasi multi-walled carbon nanotubes, rayon-nanocomposite filament, sifat mekanik, daya saring, dispersi
KONVERSI SELULOSA TANDAN KOSONG SAWIT (TKS) MENJADI ETANOL
Authors: Sarwono Rakhman , Triwahyuni Eka , Aristiawan Yosi , Kurniawan Hendris Hendarsyah , Anindyawati Trisanti
Published: August 2017

A serious global energy crisis is thought to be originated from the imbalance rapid consumption and the non-renewable nature of the fossil fuels. A potential, yet promising route for diminising this problem might involve rapid conversion of organic waste and biomass into fuels as an alternative. Oil-palm empty fruit bunch (EFB) is the waste from the oil palm plantation which abundant amount of lignocellulosic EFB biomass. EFB biomass was used as raw material of the second generation of bioethanol production. EFB was converted into ethanol through enzymatic hydrolysis and fermentation simultaneously. Cellulose waste was then turned into glucose by enzymatic saccharification and finally fermented into ethanol. The experiment of 20 liter broth resulted in ethanol concentration of about 7.93% (w/w). Conversion of cellulose into glucose was about 60.02%, and conversion of glucose into ethanol was about 88.44%. Following distillation, ethanol of 1970 mL was obtained at a concentration of 63% (v/v).Keywords: EFB, saccharification, fermentation, glucose, ethanol  ABSTRAKAdanya krisis energi minyak bumi secara global disebabkan oleh ketimpangan antara konsumsi dan produksi minyak bumi. Guna mengimbangi ketimpangan tersebut, maka dilakukan konversi limbah organik dan biomassa menjadi bahan bakar secara tepat dan cepat. Tandan Kosong Sawit (TKS) merupakan limbah dari perkebunan sawit yang melimpah jumlahnya. Penelitian etanol generasi kedua berbahan baku biomassa lignoselulosa dilakukan melalui proses sakarifikasi selulosa menjadi glukosa secara enzimatis dan fermentasi glukosa menjadi etanol. Berdasarkan hasil yang diperoleh dari 20 liter hidrolisat didapat konsentrasi etanol sebesar 7,93% (b/b). Hasil konversi selulosa menjadi glukosa sebesar 60,02%, sedangkan konversi glukosa menjadi etanol sebesar 88,44%. Setelah dilakukan distilasi didapatkan etanol sebanyak 1970 mL dengan konsentrasi 63% (v/v).Kata kunci: TKS, sakarifikasi, fermentasi, glukosa, etanol
SINTESA DAN KARAKTERISASI HIDROGEL SUPER ABSORBEN POLIMER (SAP) BERBASIS SELULOSA MENGGUNAKAN CROSSLINKING AGENT WATER-SOLUBLE CARBODIIMIDE (WSC)
Authors: Anah Lik , Astrini Nuri
Published: August 2017

Carboxymethylcellulose (CMCNa), hydroxyethyl cellulose (HEC) were used as raw materials for synthesizing a superabsorbent polymer (SAP) hydrogel by solution polymerization techniques using of 2.5% water-soluble carbodiimide (WSC) as crosslinking agent and 1% citric acid as catalysator. The  ratio of CMCNa to HEC at 1 : 1; 3 : 1; 5 : 1 and 10 : 1 were used as variable of process. The effect of monomer concentration on water absorbency and water uptake was studied. The swelling test showed that the highest water retention capacity (6.58 g/g) was reached at ratio CMCNa to HEC = 5 : 1 in 100 minutes and the deswelling test ( 61.47%) was reached at ratio CMCNa to HEC = 5 :1 in 120 minutes. PPA absorb hydrogel was used as standard with equilibrium swelling 123 g/g. The SAP hydrogel were characterized by infra red spectroscopy, and the result showed that there were some of structural changes in height of few bands of hydrophylic groups such as =C-H at 2930 cm-1, C-H antisym and sym at 2875 cm-1, H-bonded –OH at 2375 cm-1, -COO- antisym at 1600 cm-1 whereas C-O at 1025 cm-1.Keywords: hydrogel, SAP, swelling, crosslinking, WSCABSTRAKSuper Absorbent Polymer (SAP) hydrogel yang disintesa melalui proses polimerisasi Carboxymethylcellulose (CMCNa), Hydroxyethyl Cellulose (HEC) menggunakan Water- soluble Carbodiimide (WSC) sebagai crosslinking agent telah dilakukan melalui teknik polimerisasi larutan (solution polimerization techniques). Pada percobaan awal telah ditetapkan konsentrasi monomer sebagai variabel proses yaitu CMCNa / HEC rasio = 1:1, 3:1, 5:1, 10:1 dan masing- masing rasio direaksikan dengan 2,5 % WSC dan 1 % asam sitrat sebagai katalisator. Pengaruh konsentrasi monomer diiuji dari kemampuan hasil gel yang terbentuk dalam menyerap dan mengikat air (water uptake) yang divisualisasikan sebagai swelling dan deswelling ratio. Hasil uji swelling menunjukkan bahwa derajat swelling tertinggi dicapai pada rasio CMCNa / HEC = 5:1 dalam waktu 100 menit dengan derajat swelling = 6,58 g/g. Hidrogel PPA absorb komersial digunakan sebagai standar pembanding dengan derajat swelling 123 g/g. Hasil uji deswelling menunjukkan bahwa persentase retensi air dalam gel adalah 61,47 % untuk rasio CMCNa / HEC = 5:1 pada 120 menit. Hasil karakterisasi gugus fungsi melalui analisis FTIR menunjukkan bahwa ada perbedaan nyata antara selulosa awal dengan selulosa yang direaksikan dengan WSC. Pita serapan tajam untuk gugus fungsi =C-H berada pada bilangan gelombang 2930 cm-1 dan C-H antisym dan sym terjadi pada 2875 cm-1, H-bonded-OH pada 2375 cm-1, gugus fungsi –COO- antisym berada pada bilangan gelombang 1600 cm-1, dan C-O terjadi pada 1025 cm-1.Kata kunci: hidrogel, SAP, swelling, crosslinking, WSC
POTENSI DAN PELUANG TANDAN KOSONG SAWIT SEBAGAI BAHAN BAKU PULP DAN KERTAS: STUDI KASUS DI INDONESIA
Authors: . Erwinsyah , Afriani Atika , Kardiansyah Teddy
Published: August 2017

Oil palm biomass derived from oil palm processing plant has a very abundant availability or nearly equal to the yield of crude palm oil. This paper provides a review of the chemical and fibers characteristics from the empty fruit bunches of oil palm tree associated with the properties of pulp and papermaking. Potential use of fibers from oil palm tree, which is included in the group of nonwood, as raw material for pulp and paper is large enough for wood substitution. Opportunities to use oil palm tree fibers as raw material for pulp and paper in industrial scale is very prospective. Keywords: empty fruit bunches, characteristics, utilization, pulp, paperABSTRAKBiomassa sawit yang berasal dari pabrik pengolahan sawit memiliki ketersediaan sangat melimpah atau hampir sama dengan rendemen minyak sawit mentah. Makalah ini memberikan tinjauan mengenai karakteristik kimia dan serat dari tandan kosong sawit terkait dengan sifat-sifat pembuatan pulp dan kertas. Potensi penggunaan serat dari tanaman sawit yang termasuk dalam kelompok nonkayu sebagai bahan baku pulp dan kertas cukup besar, untuk substitusi kayu. Peluang penggunaan serat tanaman sawit serta pemanfaatannya sebagai bahan baku pulp dan kertas skala industri cukup prospektif.Kata kunci: tandan kosong sawit, karakteristik, pemanfaatan, pulp, kertas
PEMANFAATAN REJEK HIDROPULPER UNTUK MENINGKATKAN NILAI KERTAS BEKAS SEBAGAI BAHAN BAKU INDUSTRI KERTAS
Authors: Hidayat Taufan , Setiawan Yusup
Published: August 2017

Limited case study of biorefinery implementation in paper industry has been done through the investigation of fibers component separation from hydropulper reject for papermaking. Pulper rejects was cleaned from metal contaminant, crushing, screening sequentially through the screen 6, 2, and 1 size, and drying. Reject fibers (R) then mixed with Old Corrugated Container or OCC (O) in the ratio of R:O as 100:0; 75:25; 50:50; 25:75; and 0:100. The handsheets then made at the basis weight of 70, 125, and 150 g/m2 or GSM, followed by testing and evaluating. The results showed that the furnish of reject and OCC mixing is feasible for papermaking, and still have some opportunities to develope further mechanically, chemically, and or fiber reinforcement. Based on the evaluation of handsheets quality, it is recommended that improved 70 GSM paper suitable for wrapping paper, while improved 125 and 150 GSM papers supposed to be a lainer board and fluting medium.Keywords: biorefinery, hydrapulper reject, wrapping paper, lainer board, fluting mediumABSTRAKStudi kasus terbatas tentang penerapan biorefinery di industri kertas telah dilakukan melalui penelitian pemisahan komponen serat dari rejek hidropulper untuk dimanfaatkan kembali menjadi kertas. Rejek hidropulper dibersihkan dari pengotor logam, dicacah, disaring secara berurutan melalui saringan berukuran 6, 2, dan 1 mm, dan dikeringkan. Serat rejek (R) dicampur dengan Old Corrugated Container atau OCC (O) dan komposisi R:O adalah 100:0; 75:25; 50:50; 25:75; 0:100, kemudian selanjutnya dibuat lembaran kertas dengan gramatur 70, 125, dan 150 g/m2 atau GSM. Kertas dikondisikan dalam ruang standar sebelum diuji mutu lembarannya. Hasil penelitian menunjukkan bahwa furnish campuran serat rejek dan OCC layak untuk dibuat lembaran kertas, tetapi masih memerlukan perlakuan lanjutan untuk meningkatkan mutunya. Berdasarkan peluang peningkatan mutu tersebut disarankan kertas gramatur 70 GSM digunakan untuk kertas bungkus, sedangkan kertas gramatur 125 dan 150 GSM untuk kertas lainer dan medium.Kata Kunci : biorefinery, rejek hidropulper, OCC, kertas bungkus, kertas lainer, kertas medium
Of Other Places: The Garden as a Heterotopic Site in Contemporary Art
Authors: Nakaue Melanie Dana
Published: August 2017

According to Michel Foucault, a heterotopia is a site where the differentiation between a location and its temporality is related to theoretical and societal concerns that challenge the notion of history, location, and subjectivity. Contemporary artists such as Stan Douglas and Hew Locke utilize the garden as heterotopic space for intervention in their work in order to investigate and challenge linear notions of time, space and subjectivity. Stan Douglas examines the historical and social underpinnings of the community gardens in early nineteenth century Northern Europe, otherwise known as the potsdamer schrebergärten, and recreates the tableau of the garden in his piece, Der Sandman. Similarly, artist Hew Locke draws upon the art of the topiary and creates an assemblage topiary sculpture, titled Black Queen, where found objects are utilized to recontextualize the concept of the garden topiary as a site of a postcolonial experience. This article investigates the way that nature, in this case the garden, is utilized and represented in contemporary art. By analyzing and applying Foucault’s lecture, “Of Other Spaces” and definition of heterotopias to the work of artists such as Douglas and Locke, the paper aims to illuminate the connection between site and subjectivity, and the multiplicity of meaning that results from the garden as being the quintessential site of postmodern experience.
A Short Atlas of Janice Kerbel’s Home Climate Gardens Drawn According to Temperate Coordinates
Authors: Zdebik Jakub
Published: August 2017

A Short Atlas of Janice Kerbel's Home Climate Gardens Drawn According to Temperate Coordinates focuses on a series of blueprints representing gardens meant for urban spaces. Yet none of these gardens were meant to be constructed and rather will remain on the page. This article focuses on the black and white aesthetics at play in the works and the dual elements of line and text that yield a space for imagination. By focusing on a particular piece, Indoor Island Garden, the article questions what the concept of the island yields for thought through notions of geography and cartography.
Introduction: The Garden in the City
Authors: Cronin Keri
Published: August 2017

Introduction to the issue.
Just Playing Mad: Irrationalism in Automatism via Claude Gauvreau
Authors: Betts Gregory
Published: August 2017

With particular attention paid to three plays by Claude Gauvreau, my study will address the aesthetics of madness as it arose in one substantial node of Canadian avant-gardism – the French-Canadian Automatist movement. The Automatists shared the European Surrealist’s strong spirit of unbridled, irrational psychological utopianism, but believed they had surpassed the Surrealists in rejecting representationalism in art (including dream representation). This paper demonstrates how and why the work of one Automatist artist struggled to enact and unleash an irrational art on an unsuspecting Québécois public.
Open Wide a Wilderness: Canadian Nature Poems
Authors: Peters JC
Published: August 2017

Book review.
A Schizophrenia
Authors: Boulet Richard Guy
Published: August 2017

A Schizophrenia: Creative Works
Screen shot 1
Authors: B G
Published: August 2017

Polyglot Mosaic
Screen shot 2
Authors: B G
Published: August 2017

Polyglot Mosaic
Screen shot 5
Authors: B G
Published: August 2017

Polyglot mosaic
Screen shot 12
Authors: B G
Published: August 2017

Polyglot mosaic
Screen shot 13
Authors: B G
Published: August 2017

Polyglot mosaic
Screen shot 16
Authors: B G
Published: August 2017

Polyglot mosaic
Untitled 5
Authors: Ament Josie
Published: August 2017

Untitled 5
The Language of Visual Sounds
Authors: Corfield Holley
Published: August 2017

The Language of Visual Sounds
Illustration
Authors: Steele Rebekah
Published: August 2017

image
Weary Wanderers 3
Authors: Manchego-Badiola Daniel F.
Published: August 2017

image
Rehkitz
Authors: Schnekenburger Ramona
Published: August 2017

image
Portrait of Mark
Authors: Serfas Shawn
Published: August 2017

painting
Retinol Constellation
Authors: Zboya Eric
Published: August 2017

visual poetry
Interview with Jimmy Limit: "Recent Advancements"
Authors: Limit Jimmy
Published: August 2017

Jimmy Limit's "Recent Advancements" (18 Jan-4 May 2014) at Rodman Hall, St. Catharines, Ontario. Curator: Marcie Bronson
Détails pour une autre histoire / Details for a Different Story
Authors: Rtist-e-s A
Published: August 2017

Chaussettes vertes et bonne nuit, les étoiles / Green Socks and Goodnight Stars (Rodman Hall, St. Catharines, ON, 10.2/1.3 2015) - storytelling based on artworks.
Catalogue Off Rodman
Authors: Rtist-e-s A
Published: August 2017

Chaussettes vertes et bonne nuit, les étoiles / Green Socks and Goodnight Stars (Rodman Hall, St. Catharines, ON, 10.2/1.3 2015) - the virtual exhibition with works not showed in the art gallery
Mischenko, Olia. _Ravine World_ (book review)
Authors: Prades Clamenç
Published: August 2017

Mischenko, Olia. _Ravine World_ (book review)
More Visual Appropriations...
Authors: Artists Multiple
Published: August 2017

Catalogue of exhibition "Visual Appropriations and Rewritings" @ Rodman Hall Art Centre, St. Catharines, ON, Canada
L’atelier et la maison d’enfance du peintre- espaces hétérochroniques chez Sergio Kokis dans Le Pavillon des miroirs (1994) et Le retour de Lorenzo Sanchez (2008)
Authors: Pruteanu Simona
Published: August 2017

Se donnant comme objet de travail deux romans de l’écrivain migrant Sergio Kokis (Le Pavillon des miroirs en 1994 et Le retour de Lorenzo Sanchez en 2008), cet article se propose d’analyser les différents espaces hétérotopiques mis en scène par les deux textes et les divers types d’hétérochronies que ces espaces attirent.
L'auteure mise en scène et mise à nu. Sur les fausses confessions de La nouvelle pornographie
Authors: Papillon Joëlle
Published: August 2017

L'inclusion dans La nouvelle pornographie (2000) du nom propre de l'auteure est perçue comme une implication qui la met en danger. La métalepse est utilisée pour inscrire le roman dans la mouvance des confessions sexuelles et se jouer de leurs codes. Comme le discours publicitaire, Marie Nimier utilise la rhétorique pornographique afin de « vendre » un contenu domestique : la pornographie de surface dissimule un récit qui réinscrit l'amour comme moteur du désir féminin. Nimier joue de la métalepse pour déjouer les scènes pornographiques et séduire le lecteur par l'intelligence de ses manipulations plutôt que par ses dévoilements.
EDITORIAL
Authors: Parayre Catherine
Published: August 2017

Editorial
Les voyelles
Authors: Léveillé J. R.
Published: August 2017

poésie
Predicting the Utilization Rate and Risk Measures of Committed Credit Facilities
Authors: Voloshyn I.
Published: August 2017

This study proposes a model for predicting the expected drawn amount of credit facilities. To model the committed credit facilities we rely on the conditional expected utilization rate derived from a joint truncated bivariate probability distribution. The expected monthly liquidity conversion factors for corporate credit lines are compared to actuals and the bivariate normal distribution is concluded to be appropriate for a practical estimate of the future utilization rate.
Fiscal Policy Reaction Function and Sustainability of Fiscal Policy in Ukraine
Authors: Vdovychenko Artem
Published: August 2017

This study analyzes the fiscal policy reaction function with switching regimes. We use Logistic Smooth Transition Regressions (LSTR) to show that fiscal policy in Ukraine during the study period remained largely in passive mode, switching to active mode during periods of a high output gap and elevated debt-to-GDP ratio. An important finding is that the fiscal policy reaction function is nonlinear. Specifically, the response of fiscal policy to the output gap is asymmetric: fiscal policy is pro-cyclical during periods of economic growth but neutral in recession.
Investigation of sexually transmitted protozoan parasite Tritrichomonas foetus in cattle in Bangladesh
Authors: Islam MR , Talukder MH , Hossain MB , Karim MA
Published: August 2017

Bovine trichomoniasis is a venereal disease caused by the protozoa Tritrichomonas foetus. The aim of the study was to investigate the prevalence of T. foetus in cattle and associated risk factors. A total of 200 samples from 183 cows and 17 bulls were collected from Veterinary Teaching Hospital, Bangladesh Agricultural University; Mymensingh district and Regional station of Bangladesh Livestock Research Institute in Shahjadpur, Sirajgonj during the period from March 2015 to May 2016. Among 200 cattle, 65 were indigenous, 100 were Holstein cross and 35 were Shahiwal cross bred. The collected samples were vaginal and uterine washing, aborted foetus and semen. The samples were collected from vagina and uterus by flashing with phosphate buffer solution by artificial insemination tube connected with 20 ml syringe. The samples were examined for T. foetus under microscope. The samples were examined on the same day of collection. Out of 200 samples examined, 3 (1.5%) were found infected with T. foetus protozoa. Among these 3 positive cases of tritrichomoniasis, one was detected in aborted foetal materials and other two were detected in vaginal washings. We did not find any T. foetus in the semen samples from the bulls. Therefore, bulls represent zero prevalence of T. foetus. During the study period the examined animals were categorized into three age groups viz. 40, 60 and 100 cattle for below 3 years, over 3 years to below 6 years and over 6 years to ten years, respectively. The prevalence rate was found in adult cattle over 6 years (>610 years) was 2.00%, over 3 years (>36 years) was 1.66% and below 3 years (<3 years) was 0%. In the study, prevalence rate of cross bred animals were 2.22% and no infection was found in indigenous bred. So, this preliminary study indicates that a low prevalence rate of bovine trichomoniasis present in cattle in this study area. Further investigation using serological and molecular method will help to detect precisely the prevalence of this important sexually transmitted protozoan disease in cattle. To our best knowledge, this is the first study on the prevalence of bovine tritrichomoniasis in Bangladesh except a single clinical case reported in 1974. This study also indicate that bovine tritrichomoniasis has a minor role related to abortion of cattle in Bangladesh.J. Bangladesh Agril. Univ. 15(1): 47-54, January 2017
Char peoples production practices and livelihood status: An economic study in Mymensingh district
Authors: Uddin MT , Dhar AR
Published: August 2017

The study was conducted to explore the production practices followed by the farmers in char areas of two Upazilas of Mymensingh district, and determine their livelihood status considering natural calamities. A total of 120 farmers were selected randomly for data collection. Data were analyzed with a combination of descriptive statistics, mathematical and statistical techniques. The results of the descriptive statistics showed that majority of the farmers were engaged in C-L-HA farming system (52.5 percent) which was followed by C-L-P and C-P-HA farming systems (32.0 and 15.5 percent, respectively). Profitability analysis reveals that crop, livestock and poultry were found profitable under C-L-P farming system, where homestead and agroforestry was found profitable under C-L-HA farming system. The differences in productivity of agricultural enterprises between char land and main land were found significant in most of the cases. About 65.0 percent of farmers average annual income was earned from farming activities and 35.0 percent was from non-farming activities. Food security indices indicated that average per capita daily calorie intake of the households (2068.9 kcal for food secure households and 1482.4 kcal for food insecure households) was still below the national average level of 2122 kcal. Livelihood status of the char dwellers incorporating farmers asset possession, activities and strategies, well being, and external policies and institutions was improved by their production practices. Applying severity ranking model (SRM) and agreement index (AI), river erosion, flood, cyclone and drought were found most frequent in the study areas that caused severe damage to respondents cultivable land, assets, agricultural enterprises and basic necessities. The study recommended that input subsidy and output price support, and social safety net programmes should be properly implemented by the government to protect the char dwellers in crisis period and enhance their livelihood condition.J. Bangladesh Agril. Univ. 15(1): 73-86, January 2017
Pathogenic identification and antibiotic susceptibility of the microorganisms isolated from urine samples of UTI patients
Authors: Miah Md Ibrahim , Ahmed Tasnia , Munshi Saurab Kishore
Published: August 2017

Urinary tract infection (UTI) is the infection that occurs in the urinary tract by the invasion of pathogenic bacteria, fungi, virus etc. under some circumstances only. Some common pathogenic bacteria associated with UTI include Escherichia coli, Proteus spp., Streptococcus spp., Staphylococcus spp., Pseudomonas spp. In the ongoing research work, about 30 UTI patients were selected randomly to detect the pathogen responsible for causing urinary tract infection and also to demonstrate their drug resistant traits. Among the 30 samples, about 14 samples were found to harbor Proteus spp. (1×104 cfu/ml to 1×105 cfu/ml). Escherichia coli was found to be the second predominant agent for UTI and recovered from 13 samples. Among the rest 3 samples, Pseudomonas spp. was found in 2 samples and Klebsiella spp. was found in one sample. Identified isolates showed resistance against different ranges of antibiotics. The study findings revealed the fact that emerging drug resistance of different pathogenic bacteria could become the major difficulties in the treatment of infectious diseases like UTI.Stamford Journal of Microbiology, Vol.6(1) 2016: 34-38
Laser Irradiation Responses of a Single-Crystal Diamond Produced by Different Crystal Growth Methods
Authors: Takayama Nozomi , Yan Jiwang
Published: August 2017

Responses of two types of single-crystal diamonds, prepared by chemical vapour deposition (CVD) and high pressure high temperature synthesis (HPHT) methods, respectively, to a nanosecond pulsed neodymium-doped yttrium aluminium garnet (Nd:YAG) laser were investigated and compared. It was found that due to the difference in the transmission rate and refractive index, the laser-induced surface/subsurface features of the two types of samples were distinctly different. For the CVD sample, destructive interference takes place on the upper surface, leading to direct ablation of smooth grooves with deposition of graphite. For the HPHT sample, however, laser-induced grooves were formed on the reverse side of the irradiation surface (namely, the lower surface) at certain laser fluences due to the constructive interference phenomenon of the laser and the high refractive index of the material. The reverse-side irradiation resulted in the formation of deep and sharp grooves with rough bottoms and insignificant deposition of graphite on the area surrounding the groove. The machining thresholds for the upper and lower surfaces of both types of diamonds were experimentally obtained and theoretically verified. The findings of this study provide important process criteria for laser machining of different kinds of diamonds. The reverse-side irradiation method enables efficient machining of deep grooves in diamonds using a lower power laser.
An Efficient Network Coding-Based Fault-Tolerant Mechanism in WBAN for Smart Healthcare Monitoring Systems
Authors: Peng Yuhuai , Wang Xiaojie , Guo Lei , Wang Yichun , Deng Qingxu
Published: August 2017

As a key technology in smart healthcare monitoring systems, wireless body area networks (WBANs) can pre-embed sensors and sinks on body surface or inside bodies for collecting different vital signs parameters, such as human Electrocardiograph (ECG), Electroencephalograph (EEG), Electromyogram (EMG), body temperature, blood pressure, blood sugar, blood oxygen, etc. Using real-time online healthcare, patients can be tracked and monitored in normal or emergency conditions at their homes, hospital rooms, and in Intensive Care Units (ICUs). In particular, the reliability and effectiveness of the packets transmission will be directly related to the timely rescue of critically ill patients with life-threatening injuries. However, traditional fault-tolerant schemes either have the deficiency of underutilised resources or react too slowly to failures. In future healthcare systems, the medical Internet of Things (IoT) for real-time monitoring can integrate sensor networks, cloud computing, and big data techniques to address these problems. It can collect and send patient’s vital parameter signal and safety monitoring information to intelligent terminals and enhance transmission reliability and efficiency. Therefore, this paper presents a design in healthcare monitoring systems for a proactive reliable data transmission mechanism with resilience requirements in a many-to-one stream model. This Network Coding-based Fault-tolerant Mechanism (NCFM) first proposes a greedy grouping algorithm to divide the topology into small logical units; it then constructs a spanning tree based on random linear network coding to generate linearly independent coding combinations. Numerical results indicate that this transmission scheme works better than traditional methods in reducing the probability of packet loss, the resource redundant rate, and average delay, and can increase the effective throughput rate.
A Novel Computer Oculomotor Rehabilitation (COR) Program for Mild Traumatic Brain Injury (mTBI)
Authors: Ciuffreda Kenneth , Yadav Naveen , Thiagarajan Preethi , Ludlam Diana
Published: August 2017

Individuals with traumatic brain injury (TBI) manifest a wide range of visual dysfunctions. One of the most prevalent involves the oculomotor system, which includes version, vergence, and accommodation. However, until recently, there has been no comprehensive, computer-based program for remediation of these oculomotor deficits. We present such an oculomotor rehabilitation program that has been tested in a clinical trial in patients having TBI with a high degree of success based on before-and-after objective system recordings, performance measures, and related visual symptomotology. The basic program components include a versatile stimulus package incorporating the attentional paradigm of rapid serial visual presentation (RSVP), the ability to add a visual and/or auditory distractor to the training to increase difficulty level (“task loading”), automated assessment of RSVP errors, and automated assessment of visual performance over the training period. Program limitations and future directions are also considered.
Antireflection Coatings for Strongly Curved Glass Lenses by Atomic Layer Deposition
Authors: Pfeiffer Kristin , Schulz Ulrike , Tünnermann Andreas , Szeghalmi Adriana
Published: August 2017

Antireflection (AR) coatings are indispensable in numerous optical applications and are increasingly demanded on highly curved optical components. In this work, optical thin films of SiO2, Al2O3, TiO2 and Ta2O5 were prepared by atomic layer deposition (ALD), which is based on self-limiting surface reactions leading to a uniform film thickness on arbitrarily shaped surfaces. Al2O3/TiO2/SiO2 and Al2O3/Ta2O5/SiO2 AR coatings were successfully applied in the 400–750 nm and 400–700 nm spectral range, respectively. Less than 0.6% reflectance with an average of 0.3% has been measured on a fused silica hemispherical (half-ball) lens with 4 mm diameter along the entire lens surface at 0° angle of incidence. The reflectance on a large B270 aspherical lens with height of 25 mm and diameter of 50 mm decreased to less than 1% with an average reflectance < 0.3%. The results demonstrate that ALD is a promising technology for deposition of uniform optical layers on strongly curved lenses without complex in situ thickness monitoring.
Microstructure, Mechanical, Oxidation and Corrosion Properties of the Cr-Al-Si-N Coatings Deposited by a Hybrid Sputtering System
Authors: Ding Jicheng , Zhang Tengfei , Yun Je , Kang Myung , Wang Qimin , Kim Kwang
Published: August 2017

CrN and Cr-Al-Si-N coatings were deposited on SUS304 and Si-wafers by a hybrid coating system. The Cr and Al-Si target were connected to the cathode arc ion plating (AIP) and high power impulse magnetron sputtering (HiPIMS), respectively. Various Al and Si contents in the coatings were obtained by changing the power of Al-Si target from 0 to 1 kW. The results demonstrated a face-centered cubic structure in all of the coatings. With increasing Al-Si target power, both the density and mean diameter of the macroparticles on the coating surface declined. As Al and Si contents increased, the microstructure of the Cr-Al-Si-N coatings evolved from a dense column structure, to a finer grain column structure, and then to a compact granular-like structure. The hardness of the coatings increased from 21.5 GPa for the pure CrN coating, to a maximum value of ~27 GPa for the Cr-Al-Si-N coating deposited at 0.4 kW, which was mainly attributed to the solid solution strengthening and increased residual stress. The addition of Al and Si contents led to enhanced wear resistance against alumina balls at both room and elevated temperatures. Meanwhile, the Cr-Al-Si-N coatings also exhibited an excellent resistance to high-temperature oxidation at 800 and 1000 °C, and improved corrosion resistance, as compared with CrN coatings.
Studies on Preparation and Characterization of Aluminum Nitride-Coated Carbon Fibers and Thermal Conductivity of Epoxy Matrix Composites
Authors: Kim Hyeon-Hye , Lee Youn-Sik , Chung Dong , Kim Byung-Joo
Published: August 2017

In this work; the effects of an aluminum nitride (AlN) ceramic coating on the thermal conductivity of carbon fiber-reinforced composites were studied. AlN were synthesized by a wet-thermal treatment (WTT) method in the presence of copper catalysts. The WTT method was carried out in a horizontal tube furnace at above 1500 °C under an ammonia (NH3) gas atmosphere balanced by a nitrogen using aluminum chloride as a precursor. Copper catalysts pre-doped enhance the interfacial bonding of the AlN with the carbon fiber surfaces. They also help to introduce AlN bonds by interrupting aluminum oxide (Al2O3) formation in combination with oxygen. Scanning electron microscopy (SEM); Transmission electron microscopy (TEM); and X-ray diffraction (XRD) were used to analyze the carbon fiber surfaces and structures at each step (copper-coating step and AlN formation step). In conclusion; we have demonstrated a synthesis route for preparing an AlN coating on the carbon fiber surfaces in the presence of a metallic catalyst.
Architectural and Integration Options for 3D NAND Flash Memories
Authors: Micheloni Rino , Crippa Luca , Zambelli Cristian , Olivo Piero
Published: August 2017

Nowadays, NAND Flash technology is everywhere, since it is the core of the code and data storage in mobile and embedded applications; moreover, its market share is exploding with Solid-State-Drives (SSDs), which are replacing Hard Disk Drives (HDDs) in consumer and enterprise scenarios. To keep the evolutionary pace of the technology, NAND Flash must scale aggressively in terms of bit cost. When approaching ultra-scaled technologies, planar NAND is hitting a wall: both academia researchers and industry worked to cope with this issue for several decades. Then, the 3D integration approach turned out to be the definitive alternative by eventually reaching mass production. This review paper exposes several 3D NAND Flash memory technologies, along with their related integration challenges, by showing their different layouts, scaling trends and performance/reliability features.
Carbon Nanotube-Based Nanomechanical Sensor: Theoretical Analysis of Mechanical and Vibrational Properties
Authors: Natsuki Toshiaki
Published: August 2017

This paper reviews the recent research of carbon nanotubes (CNTs) used as nanomechanical sensing elements based mainly on theoretical models. CNTs have demonstrated considerable potential as nanomechanical mass sensor and atomic force microscope (AFM) tips. The mechanical and vibrational characteristics of CNTs are introduced to the readers. The effects of main parameters of CNTs, such as dimensions, layer number, and boundary conditions on the performance characteristics are investigated and discussed. It is hoped that this review provides knowledge on the application of CNTs as nanomechanical sensors and computational methods for predicting their properties. Their theoretical studies based on the mechanical properties such as buckling strength and vibration frequency would give a useful reference for designing CNTs as nanomechanical mass sensor and AFM probes.
Antenna Arrays for Line-of-Sight Massive MIMO: Half Wavelength Is Not Enough
Authors: Pinchera Daniele , Migliore Marco , Schettino Fulvio , Panariello Gaetano
Published: August 2017

The aim of this paper is to analyze the array synthesis for 5 G massive MIMO systems in the line-of-sight working condition. The main result of the numerical investigation performed is that non-uniform arrays are the natural choice in this kind of application. In particular, by using non-equispaced arrays, we show that it is possible to achieve a better average condition number of the channel matrix and a significantly higher spectral efficiency. Furthermore, we verify that increasing the array size is beneficial also for circular arrays, and we provide some useful rules-of-thumb for antenna array design for massive MIMO applications. These results are in contrast to the widely-accepted idea in the 5 G massive MIMO literature, in which the half-wavelength linear uniform array is universally adopted.
Interference-Aware PAPR Reduction Scheme to Increase the Energy Efficiency of Large-Scale MIMO-OFDM Systems
Authors: Lee Byung , Kim Youngok
Published: August 2017

Large-scale (LS) multi-user (MU) multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) is considered to be a desirable signal transmission scheme because it can significantly improve the energy efficiency (EE) and spectral efficiency (SE) of the system. However, there are many difficulties in realizing an LS-MU-MIMO-OFDM system, and one of these is its high peak-to-average power ratio (PAPR), which results in serious nonlinear signal distortion and power inefficiency of the power amplifier (PA). LS-MIMO-OFDM systems require a lot of PAs, which are necessary to be connected to each antenna. To compensate for the PA nonlinearity and increase the efficiency, a digital pre-distorter (DPD) is very popular and has been successfully implemented in current base stations (BSs). However, a DPD is very difficult to use in an LS-MU-MIMO-OFDM system because it is expensive, but should be applied to each antenna. Therefore, a considerate scheme of signal processing is necessary to cope with the PA nonliearity issue of the LS-MU-MIMO-OFDM system. In this paper, we propose an interference-aware iterative clipping and filtering peak-to-average power ratio (PAPR) reduction scheme for LS-MU-MIMO-OFDM systems. In the proposed scheme, the clipping level in the clipping process is adaptively adjusted based on any kind of interference level that exists in the general communication environment. In particular, when matched filtering (MF) precoding is used for the LS-MU-MIMO-OFDM, the inter-user interference (IUI) always exists with a practical number of transmitter (TX) antennas, and this inevitable IUI level can be a decision point for the clipping ratio (CR). Choosing a proper CR to make the clipping noise lower than IUI has a very high benefit for the EE improvement of the system. The results of numerical analysis show that the proposed scheme can induce a very effective peak-to-average power ratio (PAPR) performance with little SE loss.
Speechlessness in Gilles de la Tourette Syndrome: Cannabis-Based Medicines Improve Severe Vocal Blocking Tics in Two Patients
Authors: Jakubovski Ewgeni , Müller-Vahl Kirsten
Published: August 2017

We report the cases of two young German male patients with treatment-resistant Tourette syndrome (TS), who suffer from incapacitating stuttering-like speech disfluencies caused by vocal blocking tics and palilalia. Case 1: a 19-year old patient received medical cannabis at a dose of 1 × 0.1 g cannabis daily. Case 2: a 16-year old patient initially received dronabinol at a maximum dose of 22.4–33.6 mg daily. Both treatments provided significant symptom improvement of vocal blocking tics as well as of comorbid conditions and were well tolerated. Thus, cannabis-based medicine appears to be effective in treatment-resistant TS patients with vocal blocking tics.