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170 Matching Results
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Artificially Structured Boundary for a high purity ion trap or ion source
This article proposes a plasma enclosed by an Artificially Structured Boundary (ASB) as an alternative to existing ion source assemblies. In accelerator applications, many ion sources can have a limited lifetime or frequent service intervals due to sputtering and eventual degradation of the ion source assembly. Ions are accelerated towards the exit canal of positive ion sources, whereas, due to the biasing scheme, electrons or negative ions are accelerated towards the back of the ion source assembly.
Date:
March 27, 2014
Creator:
Pacheco, J. L.; Ordonez, Carlos A. & Weathers, Duncan L.
Object Type:
Article
System:
The UNT Digital Library
Magnetobound positronium and protonium
This article investigates the formation of magnetobound positronium and protonium via classical trajectory simulations of binary point charge interactions in an external magnetic field. The results of computer simulations of the fully three-dimensional trajectories of classical and non-relativistic point charges with the same mass, equal charge magnitude, and opposite sign are reported. The simulations show the formation of magnetobound positronium and protonium. The results yield formation cross sections, which are compared to analytical expressions. Additionally, the results reveal that magnetobound states drift across magnetic field lines.
Date:
August 27, 2014
Creator:
Correa, J. R. & Ordonez, Carlos A.
Object Type:
Article
System:
The UNT Digital Library
Phase space of positron trajectories exiting a charged particle source through a magnetic field point cusp
This article presents a configuration of magnetic fields using properties of cylindrically symmetric permanent magnets as a candidate to produce a high purity charged particle source or trap. Cylindrically symmetric hollow permanent magnets produce magnetic field point cusps on the axis of symmetry. A magnetic field point cusp reflects all particles that lie outside a narrow region of phase space, a region dependent on particle kinetic energies and on the magnetic field intensity.
Date:
December 30, 2013
Creator:
Kiester, A. S.; Pacheco, J. L.; Ordonez, Carlos A. & Weathers, Duncan L.
Object Type:
Article
System:
The UNT Digital Library
Explicitly teaching five technical genres to English first-language adults in a multi-major technical writing course
In this article, the author reports the effects of explicitly teaching five technical genres to English first-language students enrolled in a multi-major technical writing course. Previous experimental research has demonstrated the efficacy of explicitly teaching academic writing to English first-language adults, but no comparable study on technical writing exists.
Date:
2014
Creator:
Boettger, Ryan K.
Object Type:
Article
System:
The UNT Digital Library
Guidelines for the standardization of preanalytic variables for blood‐based biomarker studies in Alzheimer's disease research
Review article which provides (1) a synopsis of selected preanalytical methods utilized in many international AD cohort studies, (2) initial draft guidelines/SOPs for preanalytical methods, and (3) a list of required methodological information and protocols to be made available for publications in the field to foster cross‐validation across cohorts and laboratories.
Date:
September 30, 2014
Creator:
O'Bryant, Sid E.; Gupta, Veer; Henriksen, Kim; Edwards, Melissa; Jeromin, Andreas; Lista, Simone et al.
Object Type:
Article
System:
The UNT Digital Library
Florigen and anti-florigen – a systemic mechanism for coordinating growth and termination in flowering plants
Article describes study establishing FLOWERING LOCUS T (FT) as a key flower-promoting gene in photoperiodic systems.
Date:
September 16, 2014
Creator:
Lifschitz, Eliezer; Ayre, Brian G. & Eshed, Yuval
Object Type:
Article
System:
The UNT Digital Library
Social Reward Questionnaire (SRQ): development and validation
Article discusses study which led to the development of the Social Reward Questionnaire (SRQ), a measure of individual differences in the value of different social rewards.
Date:
March 11, 2014
Creator:
Foulkes, Lucy; Viding, Essi; McCrory, Eamon J. & Neumann, Craig S.
Object Type:
Article
System:
The UNT Digital Library
SPHK1 regulates proliferation and survival responses in triple-negative breast cancer
Article describes study suggesting that the inhibation of sphingosine kinase 1 (SPHK1) can attenuate ERK1/2 and AKT signaling and reduce growth of triple-negative breast cancer (TNBC) cells in vitro and in a xenograft SCID mouse model.
Date:
March 27, 2014
Creator:
Datta, Arpita; Loo, Ser Yue; Huang, Baohua; Wong, Lingkai; Tan, Sheryl S.L.; Tan, Tuan Zea et al.
Object Type:
Article
System:
The UNT Digital Library
γ-tocotrienol inhibits angiogenesis-dependent growth of human hepatocellular carcinoma through abrogation of AKT/mammalian target of rapamycin pathway in an orthotopic mouse model
Article describing an investigation into whether γ-tocotrienol can abrogate angiogenesis-mediated tumor growth in hepatocellular carcinoma (HCC) and if so, through what molecular mechanisms.
Date:
March 31, 2014
Creator:
Siveen, Kodappully Sivaraman; Ahn, Kwang Seok; Ong, Tina H.; Shanmugam, Muthu K.; Li, Feng; Yap, Wei Ney et al.
Object Type:
Article
System:
The UNT Digital Library
Association of Host and Microbial Species Diversity across Spatial Scales in Desert Rodent Communities
Article describes study in which researchers employed a natural gradient of rodent species richness and quantified bacterial communities in rodent blood at several hierarchical spatial scales to test the hypothesis that associations between host and microbial species diversity will be positive in communities dominated by organisms with broad niches sampled at large scales.
Date:
October 24, 2014
Creator:
Gavish, Yoni; Kedem, Hadar; Messika, Irit; Cohen, Carmit; Toh, Evelyn; Munro, Daniel et al.
Object Type:
Article
System:
The UNT Digital Library
Negative Regulation of Signal Transducer and Activator of Transcription-3 Signalling Cascade by Lupeol Inhibits Growth and Induces Apoptosis in Hepatocellular Carcinoma Cells
In this article, the authors evaluate the effect of lupeol on STAT3 signalling cascade and its regulated functional responses in hepatocellular carcinoma (HCC) cells. Constitutive activation of signal transducer and activator of transcription signalling 3 (STAT3) has been linked with survival, proliferation and angiogenesis in a wide variety of malignancies including HCC. Lupeol exhibited its potential anticancer effects in HCC through the downregulation of STAT3-induced pro-survival signalling cascade.
Date:
August 7, 2014
Creator:
Siveen, Kodappully Sivaraman; Nguyen, An H.; Lee, J. H.; Li, Feng; Singh, S. S.; Kumar, Alan Prem et al.
Object Type:
Article
System:
The UNT Digital Library
Introducción a la Sección Especial de Revista Bosque. Avances de una red de sitios de estudios ecológicos a largo plazo en el suroeste de Sudamérica
This article is the forward to a special section on long-term ecological research in Chile. It briefly introduces the main topics and ideas of each of the articles and comment on their relevance in the context of research and monitoring of Chilean ecosystems and in the perspective of global change research.
Date:
2014
Creator:
Armesto, Juan J., 1953-; Nuñez-Avila, Mariela; Donoso, Pablo & Rozzi, Ricardo, 1960-
Object Type:
Article
System:
The UNT Digital Library
Pulsed cooperative backward emissions from non-degenerate atomic transitions in sodium
Article describes study which examines backward cooperative emissions from a dense sodium atomic vapor.
Date:
October 9, 2014
Creator:
Thompson, Jonathan V.; Ballmann, Charles W.; Cai, Han; Yi, Zhenhuan; Rostovtsev, Yuri V.; Sokolov, Alexei V. et al.
Object Type:
Article
System:
The UNT Digital Library
Molecular evolutionary and structural analysis of the cytosolic DNA sensor cGAS and STING
Article describes study in which researchers carried out comprehensive evolutionary analyses of the GMP-AMP (cGAMP) synthase (cGAS)-STING pathway.
Date:
June 30, 2014
Creator:
Wu, Xiaomei; Wu, Fei-Hua; Wang, Xiaoqiang; Wang, Lilin; Siedow, James N.; Zhang, Weiguo et al.
Object Type:
Article
System:
The UNT Digital Library
"With dignity we will fight!" Worker Self-managed Hotel BAUEN Once Again Under Threat
This article discusses the efforts of self-managed workers in Hotel BAUEN in Buenos Aires, Argentina to appeal for international support as they confront the threat of eviction.
Date:
2014
Creator:
Sobering, Katherine
Object Type:
Paper
System:
The UNT Digital Library
Meta-discoveries from a synthesis of satellite-based land-cover mapping research
This article provides a spatialized database of scientific literature in English about land-cover mapping.
Date:
June 19, 2014
Creator:
Yu, Le; Liang, Lu; Wang, Jie; Zhao, Yuanyuan; Cheng, Qu; Hu, Luanyun et al.
Object Type:
Article
System:
The UNT Digital Library
Mapping Mountain Pine Beetle Mortality through Growth Trend Analysis of Time-Series Landsat Data
This article presents a forest growth trend analysis method that integrates Landsat temporal trajectories and decision tree techniques to derive annual forest disturbance maps over an 11-year period.
Date:
June 18, 2014
Creator:
Liang, Lu; Chen, Yanlei; Hawbaker, Todd J.; Zhu, Zhiliang & Gong, Peng
Object Type:
Article
System:
The UNT Digital Library
Soil Diversity as Affected by Land Use in China: Consequences for Soil Protection
This article reports the first effort to assess the impact of land-use change on soil diversity for the entire nation of China.
Date:
April 21, 2014
Creator:
Shangguan, Wei; Gong, Peng; Liang, Lu; Dai, Yongjiu & Zhang, Keli
Object Type:
Article
System:
The UNT Digital Library
Efficient multiband and broadband cross polarization converters based on slotted Lshaped nanoantennas
This article presents highly efficient reflective cross polarization converters based on metamaterials operating in the infrared regime.
Date:
November 14, 2014
Creator:
Ding, Jun; Arigong, Bayaner; Ren, Han; Zhou, Mi; Shao, Jin; Lin, Yuankun et al.
Object Type:
Article
System:
The UNT Digital Library
Holographic fabrication of 3D photonic crystals through interference of multi-beams with 4 + 1, 5 + 1 and 6 + 1 configurations
This article fabricates 3D photonic crystals or quasi-crystals through single beam and single optical element based holographic lithography.
Date:
September 9, 2014
Creator:
George, David; Lutkenhaus, Jeffrey; Lowell, David; Moazzezi, Mojtaba; Adewole, Murthada; Philipose, Usha et al.
Object Type:
Article
System:
The UNT Digital Library
Patrones Estacionales Y Espaciales De La Diversidad De Moluscos Intermareales De Bahía RóBalo, Canal Beagle, Reserva De La Biosfera Cabo De Hornos, Chile
This article characterizes molluscs assemblages in Róbalo bay, identifying spatial-temporal changes in assemblage composition, species richness, abundance, functional groups, and diversity of molluscs species.
Date:
August 28, 2014
Creator:
Ojeda, Jaime; Rosenfeld, Sebastián; Marambio, Johanna; Rozzi, Ricardo, 1960- & Mansilla, Andrés O.
Object Type:
Article
System:
The UNT Digital Library
Estimating FPAR of Maize Canopy Using Airborne Discrete-Return LiDAR Data
This article tests a method to estimate the fraction of absorbed photosynthetically active radiation (FPAR) of maize from airborne discrete-return LiDAR data.
Date:
February 26, 2014
Creator:
Luo, Shezhou; Wang, Cheng; Xi, Xiaohuan & Pan, Feifei
Object Type:
Article
System:
The UNT Digital Library
Engineering Metal Oxide Nanostructures for the Fiber Optic Sensor Platform
This article presents an effective integration scheme of nanostructured SnO₂ with the fiber optic platform for chemical sensing applications based on evanescent optical interactions.
Date:
January 30, 2014
Creator:
Poole, Zsolt; Ohodnicki, Paul; Chen, Rongzhang; Lin, Yuankun & Chen, Kevin P.
Object Type:
Article
System:
The UNT Digital Library
Estudios socio-ecológicos de largo plazo en los sitios fundadores de la red LTSER-Chile: desafíos y oportunidades para el futuro
This article presents an analysis of the research programs carried out in the three foundational sites of the Chilean Long-Term Socio-Ecological Research Network (LTSER-Chile) and presents the context in which these lines have been established.
Date:
October 14, 2014
Creator:
Gaxiola, Aurora; Celis-Diez, Juan L.; Rozzi, Ricardo, 1960- & Gutiérrez, Julio R., 1953-
Object Type:
Article
System:
The UNT Digital Library