• Title/Summary/Keyword: Benjamin

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Polymer blends with a liquid crystalline polymer dispersed phase

  • Lee, Heon-Sang;Morton M. Denn
    • Korea-Australia Rheology Journal
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    • v.11 no.4
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    • pp.269-273
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    • 1999
  • Immiscible polymer blends containing a liquid crystalline polymer dispersed phase can be described by existing blend theories when the dispersed-phase droplets are large relative to the orientation correlation length ("domain size") of the LCP. There does not appear to be an interfacial contribution to the linear viscoelastic properties of the blend from droplets smaller than the correlation length. Polyester blends, where interfacial interactions occur between the LCP and the matrix, exhibit a reduction in viscosity to below the viscosity of either component at low shear rates, where the droplet morphology is spherical. These anomalies cannot be explained in the context of existing theory.ng theory.

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Castleman's Disease of the Neck (경부 Castleman씨 병(거대 림프절 증식증) 1예)

  • Yang Yoon-Soo;Lee Sang-Heon;Hong Ki-Hwan
    • Korean Journal of Head & Neck Oncology
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    • v.20 no.2
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    • pp.194-197
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    • 2004
  • Castleman's disease was first described from Benjamin Castleman in 1956. The disease today is enumerated among lymphoproliferative disorders and has unknown etiology. Although the mediastinum is a their most common location, they also occurs in other areas of the body, usually where lymph nodes are normally found. Castleman's disease of the neck is very rare. We describe a case of Castleman's disease of the neck in a middle aged man, and discuss the clinical presentation, radiological findings, and pathological features.

Optimization of Repulping Process of Unsorted ONP for Pulp Mold (II) - Pilot trial -

  • Cho, Byoung-Uk;Ryu, Jeong-Yong;Fabry, Benjamin;Song, Bong-Keun
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.39 no.5
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    • pp.39-44
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    • 2007
  • In order to utilize unsorted ONP, which contains leaflets (printed coated papers), as a raw material to produce pulp mold, optimum conditions for repulping were investigated with the pilot Helico pulper at Centre Technique du Paper (CTP), France. Two major process factors were focused: repulping concentration and rotor speed. Repulping at a higher concentration showed more rapid defibering kinetics. Increasing the rotational speed of rotor at the optimum repulping concentration accelerated the defibering kinetics while it also led to higher fines generation and faster decrease in drainage property of the produced pulp. Hence, an alternative way was suggested: starting repulping at a conventional rotor speed and then accelerating the rotor speed for the last minute(s) of repulping.

Flocculation kinetics and hydrodynamic interactions in natural and engineered flow systems: A review

  • Oyegbile, Benjamin;Ay, Peter;Narra, Satyanarayana
    • Environmental Engineering Research
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    • v.21 no.1
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    • pp.1-14
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    • 2016
  • Flocculation is a widely used phase separation technique in industrial unit processes and is typically observed in many natural flow systems. Advances in colloidal chemistry over the past decades has vastly improved our understanding of this phenomenon. However, in many practical applications, process engineering still lags developments in colloidal science thereby creating a gap in knowledge. While significant progress has been made in environmental process engineering research over the past decades, there is still a need to align these two inter-dependent fields of research more closely. This paper provides a comprehensive review of the flocculation mechanism from empirical and theoretical perspective, discuss its practical applications, and examines the need and direction of future research.

Revisiting the Kendall Tau Statistic and Kendall's Tau Table Giving P-values

  • Chastek, Benjamin;Rahman, Mezbahur
    • Journal of the Korean Data and Information Science Society
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    • v.16 no.2
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    • pp.477-505
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    • 2005
  • This paper gives a computer code that gives p-value's for Kendall's Tau table. The code centers around finding the cumulative frequency of a given Sigma value. Current tables usually give critical values for given cut-off percentages. For small sample sizes the critical values may be inexact, and for large samples the values are not be published. SPSS has a built in function for finding the Kendall rank correlation, but the output does not include the Sigma value. Before the code is given, this paper will concentrate around how to find the Sigma value, and the related tau statistic. The computer code is written in MATLAB, but the ideas can be easily transferred to different languages.

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Myositis ossificans of the platysma mimicking a malignancy: a case report with review of the literature

  • Adebayo, Ezekiel Taiwo;Ayuba, Godwin Iko;Ajike, Sunday Olusegun;Fomete, Benjamin
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.42 no.1
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    • pp.55-59
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    • 2016
  • The two main forms of myositis ossificans are congenital and acquired. Either form is rare in the head and neck region. The acquired form is often due to trauma, with bullying as a fairly common cause. This report of myositis ossificans of the platysma in an 11-year-old female patient emphasizes the need for a high index of suspicion in unexplainable facial swellings in children and the benefit of modern investigative modalities in their management.

MC21/CTF and VERA multiphysics solutions to VERA core physics benchmark progression problems 6 and 7

  • Kelly, Daniel J. III;Kelly, Ann E.;Aviles, Brian N.;Godfrey, Andrew T.;Salko, Robert K.;Collins, Benjamin S.
    • Nuclear Engineering and Technology
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    • v.49 no.6
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    • pp.1326-1338
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    • 2017
  • The continuous energy Monte Carlo neutron transport code, MC21, was coupled to the CTF subchannel thermal-hydraulics code using a combination of Consortium for Advanced Simulation of Light Water Reactors (CASL) tools and in-house Python scripts. An MC21/CTF solution for VERA Core Physics Benchmark Progression Problem 6 demonstrated good agreement with MC21/COBRA-IE and VERA solutions. The MC21/CTF solution for VERA Core Physics Benchmark Progression Problem 7, Watts Bar Unit 1 at beginning of cycle hot full power equilibrium xenon conditions, is the first published coupled Monte Carlo neutronics/subchannel T-H solution for this problem. MC21/CTF predicted a critical boron concentration of 854.5 ppm, yielding a critical eigenvalue of $0.99994{\pm}6.8E-6$ (95% confidence interval). Excellent agreement with a VERA solution of Problem 7 was also demonstrated for integral and local power and temperature parameters.

A First Case of Human Trichuriasis from a Roman Lead Coffin in France

  • Dufour, Benjamin;Segard, Maxence;Bailly, Matthieu Le
    • Parasites, Hosts and Diseases
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    • v.54 no.5
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    • pp.625-629
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    • 2016
  • A paleoparasitological study was carried out on 2 lead coffins recovered from the Roman site of Jaunay-Clan (near Poitiers, France). For the first time, this particular type of burial gave positive parasitological results, and eggs of the whipworm Trichuris trichiura were identified in 1 individual. In the present case, thanatomorphose associated with funerary practices may explain the scarcity of the recovered eggs. However, human whipworm has now been observed in 9 individuals dated to the Roman period. The very high frequency of Trichuris sp. eggs in Roman archaeological sites (up to 80%) suggests that fecal peril, hygiene, and waste management were problematic during this period. Finally, due to the fact that very few analyses have been conducted on human bodies dated to the Roman period, more analyses must be performed in the future to provide further information about diseases in the Roman world.

ANNIHILATOR CONDITIONS ON RINGS AND NEAR-RINGS

  • Cho, Yong-Uk
    • The Pure and Applied Mathematics
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    • v.10 no.3
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    • pp.177-183
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    • 2003
  • In this paper, we initiate the study of some annihilator conditions on polynomials which were used by Kaplansky [Rings of operators. W. A. Benjamin, Inc., New York, 1968] to abstract the algebra of bounded linear operators on a Hilbert spaces with Baer condition. On the other hand, p.p.-rings were introduced by Hattori [A foundation of torsion theory for modules over general rings. Nagoya Math. J. 17 (1960) 147-158] to study the torsion theory. The purpose of this paper is to introduce the near-rings with Baer condition and near-rings with p.p. condition which are somewhat different from ring case, and to extend a results of Armendariz [A note on extensions of Baer and P.P.-rings. J. Austral. Math. Soc. 18 (1974), 470-473] and Jøndrup [p.p. rings and finitely generated flat ideals. Proc. Amer. Math. Soc. 28 (1971) 431-435].

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Authentic Leadership and Construction Superintendent Effectiveness

  • Broughton, Benjamin;Lee, Soon-Jae;Ryu, Jay Sang;Talley, Kimberly
    • Journal of Construction Engineering and Project Management
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    • v.6 no.4
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    • pp.15-23
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    • 2016
  • The construction industry suffers from declining productivity and lack of trust between stakeholders and among the public. Increasing technical, regulatory, environmental and ethical challenges face the sector and necessitate a new type of leader. Authentic leadership is a relatively new construct that focuses on a leader demonstrating self-awareness, relational transparency, an internalized ethical and moral perspective and balanced processing. This study uses the Authentic Leadership Questionnaire to measure construction superintendent's levels of authentic leadership and compares them to effectiveness ratings. There is a correlation between higher authentic leadership scores and effectiveness and this study concludes that authentic leaders are more effective superintendents.