bluuebunny/crossref_metadata_2025 huggingface dataset:
Info Sim: Prototyping an information system for Digital Factory management
Authors: Ayadi Mohamed , Affonso Roberta Costa , Cheutet Vincent , Haddar Mohamed
Published: July 2015

Digital Factory can be defined as a set of software tools and methodologies allowing the design, simulation, initiation and optimization of production systems, with regard to the product development process. However, it remains not widespread in the industries, essentially due to the insufficient capability to communicate between the different entities and actors implied in the product development process and so to ensure a global consistency of the product and its production system definition. In this research work, we propose an information system dedicated to the management of data and information of product, production and simulation, which allows the integration of different points of view and the communication between different actors who participate in the Digital Factory process. Such information system has been tested on a case study coming from an industrial context.
Modelling knowledge transfer: A knowledge dynamics perspective
Authors: Mougin Jonathan , Boujut Jean-Francois , Pourroy Franck , Poussier Grégory
Published: July 2015

The increasing complexity in design activities leads designers to collaborate and share knowledge within distributed teams. This makes designers use systems such as knowledge management systems to reach their goal. In this article, our aim is to investigate on improving the use of knowledge management systems by defining a framework for modelling knowledge transfer in such context. The proposed framework is partly based on reuse of existing models found in the literature and on a participant observation methodology. Then, we tested this framework through several case studies presented in this article. These investigations enable us to observe, define and model more finely the knowledge dynamics that occur between knowledge workers and knowledge management systems.
Offender Mobility During the Crime: Investigating the Variability of Crime Event Contexts and Associated Outcomes in Stranger Sexual Assaults
Authors: Hewitt Ashley , Beauregard Eric
Published: July 2015

Using data from qualitative interviews and police reports, latent class analysis is used on a sample of 54 repeat stranger sexual offenders who committed 204 sexual assaults to identify discrete contexts present at the time of victim encounter that influence these offenders’ decision to use more than one location to commit their crimes. Five distinct classes are identified: residential outdoor common area, spontaneous/quiet outdoor site, residential home, active green space, and indoor/public gathering place. An investigation into the outcome(s) that most often result from the offender’s decision to move the victim during the sexual assault indicates that those who move the victim from an active green space overwhelmingly engage in sexual penetration, as well as forcing their victims to commit sexual acts on them. Crimes where the victim is moved from a residential home show evidence of the offender physically harming the victim as well as using more force than necessary to complete the assault. Implications for situational crime prevention are discussed.
Effect of heat-moisture treatment on the structural, physicochemical, and rheological characteristics of arrowroot starch
Authors: Pepe Larissa S , Moraes Jaqueline , Albano Kivia M , Telis Vânia RN , Franco Célia ML
Published: July 2015

The effect of heat-moisture treatment on structural, physicochemical, and rheological characteristics of arrowroot starch was investigated. Heat-moisture treatment was performed with starch samples conditioned to 28% moisture at 100℃ for 2, 4, 8, and 16 h. Structural and physicochemical characterization of native and modified starches, as well as rheological assays with gels of native and 4 h modified starches subjected to acid and sterilization stresses were performed. Arrowroot starch had 23.1% of amylose and a CA-type crystalline pattern that changed over the treatment time to A-type. Modified starches had higher pasting temperature and lower peak viscosity while breakdown viscosity practically disappeared, independently of the treatment time. Gelatinization temperature and crystallinity increased, while enthalpy, swelling power, and solubility decreased with the treatment. Gels from modified starches, independently of the stress conditions, were found to have more stable apparent viscosities and higher G′ and G″ than gels from native starch. Heat-moisture treatment caused a reorganization of starch chains that increased molecular interactions. This increase resulted in higher paste stability and strengthened gels that showed higher resistance to shearing and heat, even after acid or sterilization conditions. A treatment time of 4 h was enough to deeply changing the physicochemical properties of starch.
Multilevel Latent Polynomial Regression for Modeling (In)Congruence Across Organizational Groups
Authors: Zyphur Michael J. , Zammuto Raymond F. , Zhang Zhen
Published: July 2015

This article addresses (in)congruence across different kinds of organizational respondents or “organizational groups”—such as managers versus non-managers or women versus men—and the effects of congruence on organizational outcomes. We introduce a novel multilevel latent polynomial regression model (MLPM) that treats standings of organizational groups as latent “random intercepts” at the organization level while subjecting these to latent interactions that enable response surface modeling to test congruence hypotheses. We focus on the case of organizational culture research, which usually samples managers and excludes non-managers. Reanalyzing data from 67 hospitals with 6,731 managers and non-managers, we find that non-managers perceive their organizations’ cultures as less humanistic and innovative and more controlling than managers, and we find that less congruence between managers and non-managers in these perceptions is associated with lower levels of quality improvement in organizations. Our results call into question the validity of findings from organizational culture and other research that tends to sample one organizational group to the exclusion of others. We discuss our findings and the MLPM, which can be extended to estimate latent interactions for tests of multilevel moderation/interactions.
Brief International Cognitive Assessment for Multiple Sclerosis (BICAMS) and performance of everyday life tasks: Actual Reality
Authors: Goverover Yael , Chiaravalloti Nancy , DeLuca John
Published: July 2015

Background:

Recently, a brief cognitive assessment (Brief International Cognitive Assessment for Multiple Sclerosis: BICAMS) has been recommended for use with patients diagnosed with multiple sclerosis (MS) to screen for cognitive impairments. However, the relationship between the BICAMS and everyday life activity has not been examined. The aim of this study was to examine whether the BICAMS can predict performance of activities of daily living using Actual RealityTM (AR) in persons with MS.

Method:

A between-subjects design was utilized to compare 41 individuals with MS and 32 healthy controls (HC) performing BICAMS and an AR task. Participants were asked to access the internet to purchase a flight ticket or cookies, and were administered the BICAMS and questionnaires to assess quality of life (QOL), affect symptomatology, and prior internet experience.

Results:

Participants with MS performed significantly worse than HC on the BICAMS and the AR. Additionally, better BICAMS performance was associated with more independent AR performance. Self-reports of QOL were not correlated with AR or BICAMS performance.

Conclusions:

Individuals with MS have greater problems with actual everyday life tasks as compared to HC. The BICAMS is a promising cognitive screening tool to predict actual functional performance in participants with MS.
MRI-detectable cortical lesions in the cerebellum and their clinical relevance in multiple sclerosis
Authors: Favaretto Alice , Lazzarotto Andrea , Poggiali Davide , Rolma Giuseppe , Causin Francesco , Rinaldi Francesca , Perini Paola , Gallo Paolo
Published: July 2015

Background:

The demonstration of cortical lesions (CL) in the cerebellum by magnetic resonance imaging (MRI) is hampered by technical and anatomical constraints.

Objective:

To investigate the occurrence of cerebellar CL and their correlation with cerebellar-related disability by combining Double Inversion Recovery (DIR) and Phase Sensitive Inversion Recovery (PSIR) MRI images in multiple sclerosis (MS) patients.

Material and methods:

40 MS patients (10 CIS/eRRMS, 24 RRMS, 6 SPMS), having a wide range of disability and disease duration, were enrolled. DIR and PSIR images were obtained with a 3T-MRI.

Results:

Cerebellar white matter lesions (WML) and/or CL were observed in 33/40 patients (82.5%) among which 14/40 had only CL. CL were demonstrated in 26/40 patients by DIR and in 31/40 by PSIR, and their number increased from CIS/eRRMS to SPMS. PSIR disclosed a significantly higher number of CL compared to DIR (RRMS: p=0.0008; SPMS: p=0.002). CL number correlates with the cerebellar Expanded Disability Status Score (EDSS) score ( r=0.72, p<0.0001). No correlation was observed between supra-tentorial and cerebellar CL.

Conclusions:

CL are detected by PSIR in the cerebellum of the majority of MS patients, are more than WML, increase with disease progression and strongly correlate with the cerebellar EDSS. Thus, the observation of CL in the cerebellum of MS at clinical onset might be useful for prognostic and therapeutic aims.
Statistical method use in public health research
Authors: Karran James C. , Moodie Erica E. M. , Wallace Michael P.
Published: July 2015

Aims: The content of public health research is often statistically complex. This review seeks to assess the breadth of statistical literacy required to understand this material, with a view to informing practitioners’ statistical training. Methods: We review the statistical content of original research articles published in 2011 in four major public health journals. Categories of statistical methodologies are identified and their frequency of use recorded. Methods’ “usefulness” in terms of the extent to which their understanding increases accessibility to the literature is assessed. Results: A total of 482 articles were reviewed and 30 categories of methods identified. Along with descriptive statistics (467 articles), regression analyses were also common, with logistic regression (206 articles) more than twice as prevalent as linear regression (95 articles). More complex regression models for use with clustered data were also commonly encountered, appearing in 96 articles. Conclusions: The public health literature features a wide variety of statistical methods, some of which are advanced. To ensure the literature remains accessible, training for public health practitioners should include statistical training that maximizes breadth as well as depth of understanding.
Motion complexity in a non-classically damped system with closely spaced modes: From standing to traveling waves
Authors: Krack Malte , Bergman Lawrence A , Vakakis Alexander F
Published: July 2015

This article addresses the phenomenon of motion complexity in a periodically oscillating system, i.e. the occurrence of non-trivial phase lags among the system's coordinates. Specifically, the steady-state forced response of a linear, weakly damped, self-adjoint system is studied, for which the extent of motion complexity is typically expected to be small. Yet, it is shown that under the condition of closely spaced modes, weak non-classical damping may lead to a transition from standing waves to traveling waves. A system of two oscillators weakly coupled via a linear spring-damper element is considered. The emergence of these motions is related to the distribution of the applied forces and the effect of adding nonlinearity in the form of a cubic spring to the system is investigated. Moreover, it is demonstrated that under certain conditions, the traveling wave response is critical, i.e. it is associated with a resonance or anti-resonance.
The state of data and statistics in journalism and journalism education: Issues and debates
Authors: Nguyen An , Lugo-Ocando Jairo
Published: July 2015

This paper discusses journalists’ vast misunderstanding, underestimation and ignorance of the nature of statistics and their role in shaping the public’s daily work and life. In countering what the authors see as the most common myths about numbers and the news, it aims to set the scene for the key issues and debates that this special issue covers. At the centre of this discussion are three key points: (a) statistics are not distant from the news: they are at the heart of journalism; (b) statistics are not mathematics: they are about the application of the same kind of logical and valid reasoning needed for other types of news material; and (c) statistics are neither cold nor boring: they are an endless source of inspiration for much excellent journalism in the past, present and, undoubtedly, future.
Bamboo charcoal/phase change material/stainless steel ring-spun complex yarn and its far-infrared/anion-releasing elastic warp-knitted fabric: Fabrication and functional evaluation
Authors: Lin Jia-Horng , Huang Yu-Tien , Li Ting-Ting , Lin Chin-Mei , Lou Ching-Wen
Published: July 2015

In this study, far-infrared/anion-releasing elastic warp-knitted fabrics were successfully fabricated. Firstly, the composition and twist degree of ring-spun complex yarns that were made by rotor-twisting machine and ring-spinning frame were optimized based on twist contraction, hairiness, and tenacity measurements. The shell materials—1-ply bamboo charcoal (BC) roving, 1-ply phase change material (PCM) or the both (BC/PCM), and the core material—BC/stainless steel (BC/SS) wrap yarn, were formed into different compositions of ring-spun complex yarns. Afterward, elastic warp-knitted fabrics were fabricated using the optimized complex yarns as weft yarns, and rubber threads and polyester (PET) filaments as warp yarns. Air permeability, far-infrared emissivity, and anion amount of resulting warp-knitted fabrics were evaluated. Ring-spun complex yarn result shows that, twist contraction rate ratio increased, but hairiness decreased with increase of twist degree. Tenacity of ring-spun complex yarn made by BC roving (Type A) or PCM roving (Type B) first increased and then decreased with twist degree. However, when 1-ply BC and 1-ply PCM rovings were used as shell materials, the tenacity of resulting ring-spun complex yarn (Type C) decreased with twist degrees. Consequently, 12 twists per inch (T.P.I.) was the optimal twist degree for the following fabrication of warp-knitted fabrics. Air permeability, far-infrared emissivity, and anion amount of elastic warp-knitted fabrics composed of BC/SS wrap yarn and BC roving reached 44.35 cm3/s/cm2, 0.94ɛ and 420 counts/cm3, respectively, indicating excellent breathability and far-infrared/anion-releasing health care functions.
Neural Substrates of Motor Recovery in Severely Impaired Stroke Patients With Hand Paralysis
Authors: Harris-Love Michelle L. , Chan Evan , Dromerick Alexander W. , Cohen Leonardo G.
Published: July 2015

In well-recovered stroke patients with preserved hand movement, motor dysfunction relates to interhemispheric and intracortical inhibition in affected hand muscles. In less fully recovered patients unable to move their hand, the neural substrates of recovered arm movements, crucial for performance of daily living tasks, are not well understood. Here, we evaluated interhemispheric and intracortical inhibition in paretic arm muscles of patients with no recovery of hand movement (n = 16, upper extremity Fugl-Meyer Assessment = 27.0 ± 8.6). We recorded silent periods (contralateral and ipsilateral) induced by transcranial magnetic stimulation during voluntary isometric contraction of the paretic biceps and triceps brachii muscles (correlates of intracortical and interhemispheric inhibition, respectively) and investigated links between the silent periods and motor recovery, an issue that has not been previously explored. We report that interhemispheric inhibition, stronger in the paretic triceps than biceps brachii muscles, significantly correlated with the magnitude of residual impairment (lower Fugl-Meyer scores). In contrast, intracortical inhibition in the paretic biceps brachii, but not in the triceps, correlated positively with motor recovery (Fugl-Meyer scores) and negatively with spasticity (lower Modified Ashworth scores). Our results suggest that interhemispheric inhibition and intracortical inhibition of paretic upper arm muscles relate to motor recovery in different ways. While interhemispheric inhibition may contribute to poorer recovery, muscle-specific intracortical inhibition may relate to successful motor recovery and lesser spasticity.
Skin Cancer Risk and Other Health Risk Behaviors
Authors: Williams Merten Julie , King Jessica L. , Walsh-Childers Kim , Vilaro Melissa J. , Pomeranz Jamie L.
Published: July 2015

Purpose. To present results of a scoping review focused on skin cancer risk behaviors and other related health risk behaviors. Skin cancer is highly preventable, yet it is the most common form of cancer in the United States with melanoma rates increasing. Limited research has been conducted examining the relationship between skin cancer prevention behaviors and other health risks, yet multiple behavioral health risk interventions have shown great promise for health promotion and reduced health care costs. Methods. Online databases were searched for research articles on skin cancer risk behaviors and related health risk behaviors. Results. Thirty-seven articles met inclusion criteria examining skin cancer behaviors including risk, sun protection behaviors, sunburn, and indoor tanning. The majority of existing studies focused on the relationship between skin cancer prevention behaviors and physical activity, body mass index, smoking, and alcohol abuse. Adults were the primary population of interest with some studies of adolescents. Conclusions. Poor skin cancer prevention behaviors were associated with alcohol use, marijuana use, and smoking among adolescents and adults. Studies on body mass index and physical activity had mixed relationships with skin cancer prevention behaviors and warrant further investigation. Indoor tanning was associated with other risky behaviors but other skin cancer prevention behaviors were not studied.
App-centric mobile media and commoditization: Implications for the future of the open Web
Authors: Daubs Michael S. , Manzerolle Vincent R.
Published: July 2015

This paper traces linkages between the commoditization of the Web and what we call “app-centric media.” By this we mean a media environment composed of a multitude of discrete-but-connected software applications and their associated protocols, platforms, frameworks, and institutions. The rapid growth of app-centric media, we argue, is directly dependent on the development and commercialization of the (mobile) Internet, as well as on the business models embedded in the development of key native app platforms such as iOS and Android.

The emergence of app-centric media, particularly in relation to mobile media, is having a marked effect on conceptualizations of the Web. The prevailing rhetoric concerning the development of the mobile Internet and app-centric media employs imagery of autonomy, empowerment, and independence for both the users and producers of apps. We argue that the commoditization central to the commercial development of the mobile Internet evidences a fusion of neoliberal rhetoric valorizing worker autonomy, individual empowerment, and entrepreneurial independence, with a mode of production consonant with “cognitive capitalism” (Dyer-Witheford, 2014; Vercellone, 2007).

Our analysis is divided into three sections. The first looks at the early development of the mobile Internet in relation to the accumulation strategies of cognitive capitalism including the structural importance of “value networks” and the “putting-out system”; the second deals with the commercialization models underpinning the two dominant app platforms, Apple’s iOS and Android; the third addresses the development of HTML as a means of production and describes how HTML5 is framed as a prospectively more “open” competitor to the existing platform duopoly. It concludes by briefly examining the development of the Firefox OS mobile platform—and whether this platform resists or incorporates the forms of commoditization associated with app-centric media generally.
Cell Phoning and Texting While Driving
Authors: Telemaque Judy Honoria Rosaire , Madueke Chizoba “Dr. Zee”
Published: July 2015

A qualitative phenomenological study was conducted on the consequences of cell phone use while operating a vehicle. We discussed why talking and texting on cell phones are so popular through the analysis of our interviews with police officers, driving instructors, and parents of teens and young adults. The participants came from central, northeastern, northwestern, and southeastern Connecticut. All had exposure with respect to the effects of cell phone usage problem. The study reached a point of theoretical saturation or redundancy by which the analysis no longer resulted in new themes. We concluded that the discoveries revealed the necessity for education, expansion of technology, and additional driver education preparation, which may provide a path for leadership to help solve the problem.
The role of the private sector in Japan’s recovery from the Great Depression
Authors: Lee Changmin
Published: July 2015

Japanese economic thought includes a long debate on the driving forces behind the country’s early and rapid recovery from the Great Depression. Most previous studies attribute the Japanese recovery to expansionary policy measures, but a minority view emphasizes the role of the private sector. This paper, while considering the contribution of the private sector, reassesses the impact of the policy measures on real output and, in turn, on the upswing in the 1930s. The analysis reveals that neither fiscal policy nor monetary policy had a consistent or potent effect on real output, but the private sector, specifically private sector consumption, accounted for a large part of output fluctuations. However, in contrast to previous studies, the response of export shock on output is unclear. The study also shows that the depreciation of the yen had a partly significant effect on output and price levels.
Experiential Learning in Kinesiology
Authors: de Groot Mary , Alexander Kisha , Culp Brian , Keith NiCole
Published: July 2015

Overview. Service learning is a form of experiential learning that pairs academic educational experiences and community organizations to promote training, civic engagement, and meaningful service by students to their community. Kinesiology programs have moved toward increasing experiential and service learning options in health promotion for their students, but few have evaluated the student perceptions of these programs. Purpose. The purpose of the current study was to conduct a qualitative evaluation of a service learning course for kinesiology majors located in a low-income urban area. Method. Ten recent graduates of a department of kinesiology were enrolled in focus groups, stratified by gender, facilitated by a graduate research assistant not affiliated with their school. Focus group discussions were audiotaped, transcribed, and analyzed for themes. Results. Nine themes were identified: (1) personal and professional experience, (2) decision to participate, (3) location decision, (4) self-efficacy, (5) perceptions of program members, (6) social interaction, (7) personal and program communication, (8) physical facilities, and (9) program outcomes. Students positively evaluated the learning experience as valuable to their personal and professional development; noted changes in their perceptions of low-income communities and increases to self-efficacy and skill acquisition from the beginning to the end of the course; and observed significant needs and improvements in physical, emotional, and social outcomes of community members. Conclusions. This study demonstrated multiple and varied benefits of a service learning program for kinesiology students. Ongoing evaluation of service learning programs in health promotion is needed to enhance student and community outcomes.
Elemental, lead and sulfur isotopic compositions of galena from
Kola carbonatites, Russia – implications for melt and mantle
evolution
Authors: Bell K. , Zaitsev A. N. , Spratt J. , Fröjdö S. , Rukhlov A. S.
Published: July 2015

Galena from four REE-rich (Khibina, Sallanlatvi, Seblyavr,
Vuoriyarvi) and REE-poor (Kovdor) carbonatites, as well as
hydrothermal veins (Khibina) all from the Devonian Kola Alkaline Province of
northwestern Russia was analysed for trace elements and Pb and S isotope
compositions. Microprobe analyses show that the only detectable elements in
galena are Bi and Ag and these vary from not detectable to 2.23 and not
detectable to 0.43 wt.% respectively. Three distinct galena groups can be
recognized using Bi and Ag contents, which differ from groupings based on Pb
isotope data. The Pb isotope ratios show significant spread with
206Pb/204Pb ratios (16.79 to 18.99),
207Pb/204Pb (15.22 to 15.58) and
208Pb/204Pb ratios (36.75 to 38.62). A near-linear
array in a 207Pb/204Pb vs.206Pb/204Pb ratio diagram is consistent with mixing
between distinct mantle sources, one of which formed during a major
differentiation event in the late Archaean or earlier. The S isotopic
composition (δ34S) of galena from carbonatites is significantly
lighter (–6.7 to –10.3% Canyon Diablo Troilite (CDT) from
REE-rich Khibina, Seblyavr and Vuoriyarvi carbonatites,
and – 3.2% CDT from REE-poor Kovdor carbonatites) than the
mantle value of 0%. Although there is no correlation between S and any of
the Pb isotope ratios, Bi and Ag abundances correlate negatively with
δ34S values. The variations in the isotopic composition of Pb
are attributed to partial melting of an isotopically heterogeneous mantle
source, while those of δ34S (together with Bi and Ag abundances)
are considered to be process driven. Although variation in Pb isotope values
between complexes might reflect different degrees of interaction between
carbonatitic melts and continental crust or metasomatized lithosphere, the
published noble gas and C, O, Sr, Nd and Hf isotopic data suggest that the
variable Pb isotope ratios are best attributed to isotopic differences
preserved within a sub-lithospheric mantle source. Different Pb isotopic
compositions of galena from the same complex are consistent with a model of
magma replenishment by carbonatitic melts/fluids each marked by quite
different Pb isotopic compositions.
Nomenclature for the laueite supergroup
Authors: Mills S. J. , Grey I. E.
Published: July 2015

A new nomenclature scheme has been set up for the laueite supergroup of
minerals, which have the general formula M12+M23+M33+(XO4)2(OH)2·8H2O,
where M1 = Fe2+, Mg2+ or
Mn2+; M2/M3 =
Al3+ or Fe3+; and XO4 =
PO4 or AsO4. The laueite supergroup is divided into
the laueite group (XO4 = PO4) and the
maghrebite group (XO4 = AsO4). These
groups are then subdivided into subgroups on the basis of the dominant
atoms, Al3+ or Fe3+, in octahedral sites
M2/M3. The new nomenclature has been
approved by the International Mineralogical Association Commission on New
Minerals, Nomenclature and Classification, proposal 14-F.
Magnesio-arfvedsonite from Jade Mine Tract, Myanmar: mineral description and crystal chemistry
Authors: Oberti Roberta , Boiocchi Massimo , Hawthorne Frank C. , Ball Neil A. , Harlow George E.
Published: July 2015

Magnesio-arfvedsonite, theCFe3+-dominant analogue of eckermannite, has been found in a sample of “szechenyite” in the mineral collection of the American Museum of Natural History (AMNH H35024). It comes from the northern part of the Jade Mine Tract near Hpakan, Kachin State, Myanmar. Associated minerals are kosmochlor–jadeite solid-solution pyroxene and clinochlore. The ideal formula of magnesio-arfvedsonite isANaBNa2C(Mg4Fe3+)TSi8O22W(OH)2, and the empirical formula derived from electron microprobe analysis and single-crystal structure refinement for the sample of this work isA(Na0.96K0.04)Σ=1.00B(Na1.57Ca0.40Fe0.022+Mn0.01)Σ=2.00C(Mg4.26Fe0.192+Fe0.413+Al0.11Ti0.034+)Σ=5.00T(Si7.99Al0.01)Σ=8.00O22W[F0.02(OH)1.98]Σ=2.00. The unit-cell dimensions area= 9.867(1),b= 17.928(2),c= 5.284(1) Å, β = 103.80(2)°,V= 907.7 (2) Å3,Z= 2. Magnesio-arfvedsonite is biaxial (–), with α = 1.624, β = 1.636, γ = 1.637, all ± 0.002 and 2Vobs= 36(1)°, 2Vcalc= 32°. The ten strongest reflections in the X-ray powder pattern [dvalues (in Å),I, (hkl)] are: 2.708, 100, (151); 3.399, 68, (131); 3.144, 63, (310); 2.526, 60, (202); 8.451, 46, (110); 3.273, 39, (240); 2.167, 37, (261); 2.582, 34, (061); 2.970, 34, (221); 2.326, 33, [(251) (421)].
Crystallographic ordering of aluminium in laueite at Hagendorf-Süd
Authors: Grey I. E. , Keck E. , Mumme W. G. , MacRae C. M. , Price J. R. , Glenn A. M. , Davidson C. J.
Published: July 2015

Crystals of laueite, Mn2+Fe23+(PO4)2(OH)2·8H2O, from the Cornelia mine open cut, Hagendorf Süd, Bavaria, are zoned due to aluminium incorporation at the iron sites, with analysed Al2O3contents varying up to 11 wt.%. Synchrotron X-ray data were collected on two crystals with different Al contents and the structures refined. The laueite structure contains two independent Fe3+-containing sites;M2 andM3, which alternate in 7 Å corner-connected octahedral chains. The coordination polyhedra are different for the two sites,M2O4(OH)2andM3O2(OH)2(H2O)2respectively. The structure refinements show that Al preferentially orders into siteM3. Refined site occupancies forM2 andM3 for the two crystals are: for crystal L-1,M2 = 0.70(1) Fe + 0.30(1) Al,M3 = 0.54(1) Fe + 0.46(1) Al and for crystal L-2,M2 = 0.67(1) Fe + 0.33(1) Al,M3 = 0.48(1) Fe + 0.52(1) Al. For crystal L-2, the octahedral chains have dominant Fe in M2, alternating with dominant Al inM3 along the chain, an ordering phenomenon not previously reported for laueite-related minerals.
Tapiaite,
Ca5Al2(AsO4)4(OH)4·12H2O,
a new mineral from the Jote mine, Tierra Amarilla, Chile
Authors: Kampf Anthony R. , Mills Stuart J. , Nash Barbara P. , Dini Maurizio , Molina Donoso Arturo A.
Published: July 2015

Tapiaite (IMA2014-024),
Ca5Al2(AsO4)4(OH)4·12H2O,
is a new mineral from the Jote mine, Tierra Amarilla, Copiapó Province,
Atacama, Chile. The mineral is a late-stage, low-temperature, secondary
mineral occurring with conichalcite, joteite, mansfieldite, pharmacoalumite,
pharmacosiderite and scorodite in narrow seams and vughs in the oxidized
upper portion of a hydrothermal sulfide vein hosted by volcanoclastic rocks.
Crystals occur as colourless blades, flattened on {101} and elongated and
striated along [010], up to ∼0.5 mm long, and exhibiting the forms {101},
{101} and {111}. The blades are commonly intergrown in subparallel bundles
and less commonly in sprays. The mineral is transparent and has a white
streak and vitreous lustre. The Mohs hardness is estimated to be between 2
and 3, the tenacity is brittle, and the fracture is splintery. It has two
perfect cleavages on {101} and {101}. The calculated density based on the
empirical formula is 2.681 g cm–3. It is optically biaxial (+)
with α = 1.579(1), β = 1.588(1), γ = 1.610(1) (white light),
2Vmeas = 66(2)° and 2Vcalc = 66°. The mineral
exhibits no dispersion. The optical orientation is X ≈
[101]; Y = b, Z ≈ [101].
The electron-microprobe analyses (average of five) provided: Na2O
0.09, CaO 24.96, CuO 0.73, Al2O3 10.08,
Fe2O3 0.19, As2O5 40.98,
Sb2O5 0.09, H2 O 23.46 (structure),
total 100.58 wt.%. In terms of the structure, the empirical formula (based
on 32 O a.p.f.u.) is (Ca4.83Cu0.102+Na0.03)Σ4.96(Al2.14Fe0.033+)Σ2.17[(As3.875+Sb0.015+)Σ3.88O16][(OH)3.76(H2O)0.24]Σ4(H2O)10·2H2O.
The mineral is easily soluble in RT dilute HCl. Tapiaite is monoclinic,
P21/n, with unit-cell
parameters a = 16.016(1), b = 5.7781(3),
c = 16.341(1) Å, β = 116.704(8)°, V =
1350.9(2) Å3 and Z = 2. The eight strongest
lines in the powder X-ray diffraction pattern are [dobs Å(I)(hkl)]:
13.91(100)(101), 7.23(17)(200,002), 5.39(22)(110,011),
4.64(33)(112,211,303), 3.952(42)(113,311,213), 3.290(35)(214,412,114,411),
2.823(39)(303,315) and 2.753(15)(513,115,121,511). The structure of tapiaite
(R1 = 5.37% for 1733 Fo > 4σF) contains
Al(AsO4)(OH)2 chains of octahedra and tetrahedra
that are topologically identical to the chain in the structure of linarite.
CaO8 polyhedra condense to the chains, forming columns, which are decorated
with additional peripheral AsO4 tetrahedra. The CaO8
polyhedra in adjacent columns link to one another by corner-sharing to form
thick layers parallel to {101} and the peripheral AsO4 tetrahedra link to
CaO6 octahedra in the interlayer region, resulting in a
framework structure.
L-selectin controls trafficking of chronic lymphocytic leukemia cells in lymph node high endothelial venules in vivo
Authors: Lafouresse Fanny , Bellard Elisabeth , Laurent Camille , Moussion Christine , Fournié Jean-Jacques , Ysebaert Loïc , Girard Jean-Philippe
Published: July 2015

Key Points

In vivo imaging reveals that CLL cells bind to lymph node high endothelial venules via an L-selectin–dependent multistep adhesion cascade. Interference with L-selectin–mediated trafficking in high endothelial venules could limit dissemination of CLL cells to lymph nodes.
Differential accumulation and function of proinflammatory 6-sulfo LacNAc dendritic cells in lymph node and colon of Crohn’s versus ulcerative colitis patients
Authors: Bsat Marwa , Chapuy Laurence , Baba Nobuyasu , Rubio Manuel , Panzini Benoit , Wassef Ramses , Richard Carole , Soucy Genevieve , Mehta Heena , Sarfati Marika
Published: July 2015

Human Slan DCs have been studied in patients with psoriasis, rheumatoid arthritis, cancer, and autoimmune diseases. In this study, we investigated the frequency, phenotype, and function of Slan DCs in blood, colon, as well as mLNs of patients with IBD. We first show that the frequency of circulating CD14dullSlan DCs was reduced in CD patients refractory to immunosuppressive drugs or TNF-α blockers relative to untreated CD, UC, and healthy subjects. In blood of CD patients, Slan DCs expressed CD172a, as detected by CD47 fusion protein binding, when compared with its lack of expression in control subjects. Next, we demonstrate that CD172a+Slan DCs that produced IL-1β and TNF-α accumulated in mLNs and colons of CD patients. The CD172a+Slan DCs up-regulated their expression of CD14 in CD tissues and the proinflammatory cytokines were produced in CD14brightCD172a+Slan DCs. By contrast, no difference was noted in the frequency of Slan DCs between inflamed, noninflamed colonic mucosa of UC patients and control, non-IBD donors. Finally, the percentage of cytokine-producing Slan DCs also augmented in response to TLR2 and NOD2 in in vitro stimulation in PBMCs of CD, but not UC, patients. In conclusion, we propose that proinflammatory CD14brightCD172a+Slan DCs are a distinguishing feature between CD and UC, as these cells accumulate uniquely in mLNs and colonic mucosa of CD patients. Thus, Slan DCs may contribute to CD immunopathogenesis.
The late endocytic Rab39a GTPase regulates multivesicular bodies-chlamydial inclusion interaction and bacterial growth
Authors: Gambarte Tudela J. , Capmany A. , Romao M. , Quintero C. , Miserey-Lenkei S. , Raposo G. , Goud B. , Damiani MT.
Published: July 2015

Given their obligate intracellular lifestyle, Chlamydia trachomatis ensure their access to multiple host sources of essential lipids by interfering vesicular transport. These bacteria hijack Rab6-, Rab11- and Rab14-controlled trafficking pathways to acquire sphingomyelin from the Golgi apparatus. Another important source of sphingolipids, phospholipids and cholesterol are multivesicular bodies (MVBs). Despite their participation in chlamydial inclusion development and bacterial replication, the molecular mechanisms mediating MVBs-inclusion interaction remain unknown. In the present study, we demonstrate that Rab39a labels a subset of late endocytic vesicles -mainly MVBs- that move along microtubules. Moreover, Rab39a is actively recruited to chlamydial inclusions throughout the pathogen life cycle by a bacterial-driven process and depending on its GTP/GDP binding state. Interestingly, Rab39a participates in the delivery of MVB and host sphingolipids to maturing chlamydial inclusions thereby promoting inclusion growth and bacterial development. Altogether, our findings indicate that Rab39a favours chlamydial replication and infectivity. This is the first report showing a late endocytic Rab GTPase involved in chlamydial infection development.
Enhanced Terahertz Emission from CuxO/Metal Thin Film Deposited on Columnar-Structured Porous Silicon
Authors: Lu Xu , Ishida Yohei , Mishina Tomobumi , Nguyen Mai Thanh , Yonezawa Tetsu
Published: July 2015

We propose a novel method to enhance the THz emission from CuxO/metal nano thin film by using columnar-structured microsized porous silicon (MS-PSi) as the substrate. THz emission was improved several times higher than that from the planar substrate due to the decreased optical reflectance and enlarged surface area.
On a Piecewise-Linear Approximation for Network Revenue Management
Authors: Kunnumkal Sumit , Talluri Kalyan
Published: July 2015

The network revenue management (RM) problem arises in airline, hotel, media, and other industries where the sale products use multiple resources. It can be formulated as a stochastic dynamic program, but the dynamic program is computationally intractable because of an exponentially large state space, and a number of heuristics have been proposed to approximate its value function. In this paper we show that the piecewise-linear approximation to the network RM dynamic program is tractable; specifically we show that the separation problem of the approximation can be solved as a relatively compact linear program. Moreover, the resulting compact formulation of the approximate dynamic program turns out to be exactly equivalent to the Lagrangian relaxation of the dynamic program, an earlier heuristic method proposed for the same problem. We perform a numerical comparison of solving the problem by generating separating cuts or as our compact linear program. We discuss extensions to versions of the network RM problem with overbooking as well as the difficulties of extending it to the choice model of network revenue RM.
Performance of a Tuberculosis Serologic Assay in Various Patient Populations
Authors: She Rosemary C. , Litwin Christine M.
Published: July 2015

Objectives:

Detection of the humoral response to diagnose active tuberculosis has had varied success. We sought to further characterize the performance of a commercial serologic assay (Active TBDetect IgG ELISA; InBios International, Seattle, WA), which had demonstrated promising results in prior studies.

Methods:

Blood specimens from patients with mycobacterial infections, autoimmune disorders, and documented nonmycobacterial infections were prospectively collected for testing by the Active TBDetect IgG ELISA. Pertinent medical records were reviewed.

Results:

The sensitivity of the InBios IgG ELISA for active tuberculosis cases was 54.1% (20/37). Reactivity occurred in 24.1% (14/58) of nontuberculous mycobacterium cases, 10.4% (7/67) of nonmycobacterial infections, 10.5% (11/105) of autoimmune disorder cases, 8.7% (8/92) of noninfected patients, 14.3% (1/7) of patients with latent tuberculosis, and 10.7% (3/28) of control pediatric cases. Overall specificity was 87.5% (288/329). Receiver operator curve analysis demonstrated an area under the curve of 0.74. Reactivity with nontuberculous mycobacterium infection occurred with Mycobacterium avium-intracellulare complex, Mycobacterium chelonae/abscessus complex, Mycobacterium simiae, and Mycobacterium gordonae and was positively associated with having a positive acid-fast bacilli smear.

Conclusions:

This study confirmed the limitations of serodiagnosis for active tuberculosis, including poor sensitivity and increased reactivity with nontuberculous mycobacterium-positive patients.
The negative impacts of volunteering: a qualitative case study of one UK Scout group
Authors: Talbot Adam
Published: July 2015

This paper reports on one element of an ethnographic research project exploring the motivations of Scout leaders in one Scout group in the United Kingdom. The article focuses on the negative consequences of volunteering and reflects on the benefits of insider research. Participants reported feeling overworked and spending too much time volunteering, and consequently feeling burnt out. Deep collaborative reflection is suggested to avoid this. Further research exploring negatives of volunteering in different contexts is needed.
Reviewing the Pioneering Roles of Gallaudet University Alumni in Advancing Deaf Education and Services in Developing Countries: Insights and Challenges From Nigeria
Authors: Eleweke C. Jonah , Agboola Isaac O. , Guteng Simon I.
Published: July 2015

T he A dvancement of deaf education and services in numerous developing countries can be traced to the pioneering efforts of many Gallaudet University alumni. In Africa, for instance, the work of one such great alumnus, Dr. Andrew Foster, stands out. Foster is credited with efforts that resulted in the establishment of over 30 educational institutions for the deaf in different countries in that continent. This article focuses on educational programs and services for deaf people in Nigeria that were made possible by the efforts of Foster and other Gallaudet University alumni he mentored. The authors describe the current condition and challenges of deaf education, as well as implications for strategies that could enhance education and related services provided to deaf people in Nigeria.
Birational automorphism groups and the movable cone theorem for Calabi-Yau manifolds of Wehler type via universal Coxeter groups
Authors: Cantat Serge , Oguiso Keiji
Published: July 2015

Thanks to the theory of Coxeter groups, we produce the first family of Calabi-Yau manifolds $X$ of arbitrary
dimension $n$, for which ${\rm Bir}(X)$ is infinite and the Kawamata-Morrison movable cone conjecture is satisfied.
For this family, the movable cone is explicitly described; it's fractal nature is related to limit sets of Kleinian
groups and to the Apollonian Gasket. Then, we produce explicit examples of (biregular) automorphisms with positive
entropy on some Calabi-Yau varieties.
Multi-marginal optimal transport on Riemannian manifolds
Authors: Kim Young-Heon , Pass Brendan
Published: July 2015

We study a multi-marginal optimal transportation problem on a Riemannian manifold, with cost function given by the
average distance squared from multiple points to their barycenter. Under a standard regularity condition on the first
marginal, we prove that the optimal measure is unique and concentrated on the graph of a function over the first
variable, thus inducing a Monge solution. This result generalizes McCann's polar factorization theorem on manifolds
from two to several marginals, in the same sense that a well-known result of Gangbo and Swiech generalizes Brenier's
polar factorization theorem on ${\Bbb R}^n$.
Fourier coefficients of harmonic weak Maass forms and the partition function
Authors: Masri Riad
Published: July 2015

In a recent paper, Bruinier and Ono proved that certain harmonic weak Maass forms have the property that the Fourier
coefficients of their holomorphic parts are algebraic traces of weak Maass forms evaluated on Heegner points. As a
special case they obtained a remarkable finite algebraic formula for the Hardy-Ramanujan partition function $p(n)$,
which counts the number of partitions of a positive integer $n$. We establish an asymptotic formula with a power saving
error term for the Fourier coefficients in the Bruinier-Ono formula. As a consequence, we obtain a new asymptotic formula
for $p(n)$. One interesting feature of this formula is that the main term contains essentially $3 \cdot h(-24n+1)$ fewer
terms than the truncated main term in Rademacher's exact formula for $p(n)$, where $h(-24n+1)$ is the class number of
the imaginary quadratic field ${\Bbb Q}(\sqrt{-24n+1})$.
On the restriction of Zuckerman’s derived functor modules A q (λ) to reductive subgroups
Authors: Oshima Yoshiki
Published: July 2015

In this article, we study the restriction of Zuckerman's derived functor
$({\frak g},K)$-modules $A_{\frak q}}(\lambda)$ to ${\frak g}'$ for
symmetric pairs of reductive Lie algebras $({\frak g},{\frak g}')$. When
the restriction decomposes into irreducible $({\frak g}',K')$-modules, we
give an upper bound for the branching law. In particular, we prove that
each $({\frak g}',K')$-module occurring in the restriction is isomorphic
to a submodule of $A_{\frak q}'}(\lambda')$ for a parabolic subalgebra
${\frak q}'$ of ${\frak g}'$, and determine their associated varieties.
For the proof, we realize $A_{\frak q}}(\lambda)$ on complex partial flag
varieties by using ${\mathcal D}$-modules.
The semiclassical theory of discontinuous systems and ray-splitting billiards
Authors: Jakobson Dmitry , Safarov Yuri , Strohmaier Alexander , Yves Colin De Verdière Alexander
Published: July 2015

We analyze the semiclassical limit of spectral theory on manifolds whose metrics have jump-like discontinuities.
Such systems are quite different from manifolds with smooth Riemannian metrics because the semiclassical limit
does not relate to a classical flow but rather to branching (ray-splitting) billiard dynamics. In order to describe
this system we introduce a dynamical system on the space of functions on phase space. To identify the quantum dynamics
in the semiclassical limit we compute the principal symbols of the Fourier integral operators associated to reflected
and refracted geodesic rays and identify the relation between classical and quantum dynamics. In particular we prove
a quantum ergodicity theorem for discontinuous systems. In order to do this we introduce a new notion of ergodicity
for the ray-splitting dynamics.
A short proof of the multidimensional Szemerédi theorem in the primes
Authors: Fox Jacob , Zhao Yufei
Published: July 2015

Tao conjectured that every dense subset of ${\mathcal P}^d$, the $d$-tuples of primes, contains constellations
of any given shape. This was very recently proved by Cook, Magyar, and Titichetrakun and independently by Tao
and Ziegler. Here we give a simple proof using the Green-Tao theorem on linear equations in primes and the
Furstenberg-Katznelson multidimensional Szemer\'edi theorem.
On the images and poles of degenerate Eisenstein series for ${\rm GL}(n,\Bbb{A}_{\Bbb{Q}})$ and ${\rm GL}(n,\Bbb{R})$
Authors: Hanzer Marcela , Muić Goran
Published: July 2015

In this paper we determine poles in the right-half plane and images of degenerate Eisenstein series
for ${\rm GL}_n(\Bbb{A}_{\Bbb{Q}})$ induced from a character on a maximal parabolic subgroup. We apply
those results to determine poles of degenerate Eisenstein series for ${\rm GL}_n(\Bbb{R})$.
Errata to: Endoscopic lifts to the Siegel modular threefold related to Klein’s cubic threefold
Authors: Okazaki Takeo , Yamauchi Takuya
Published: July 2015

Errata to the author’s paper [1, Amer. J. Math. 135 (2013), no. 1].