3,544 research outputs found
Remedial Stability Analysis of Unstable Eastern Approach Embankment, Bluegrass Parkway Bridges over Chaplin River
In a meeting held on March 7, 1973, the Division of Research was requested to perform a supplementary slope stability analysis of the unstable, eastern approach embankment and foundation located at the crossing of the Bluegrass Parkway over Chaplin River and extending between Stations 2317+14 and 2321+00. Previously (see referenced report), two remedial schemes had been considered for increasing the stability of the unstable soil mass to an acceptable level. Those included: 1) loading the toe area of the existing, eastern approach slope with a berm, including a sloping berm, and 2) unloading the upper portion of the eastern slope by excavation, that is, decreasing the original approach slope (1.5 horizontal to 1 vertical), which would require an extension of the bridges, construction of piers at the present locations of the abutments and a relocation of the abutments.
In the report cited, consideration was given primarily to using a berm to stabilize the eastern approach slope. Normally, that method of increasing the stability of an unstable embankment is the most economical. However, loading the toe area of the existing slope with a berm was considered undesirable in the meeting of March 7, 1973, because a berm would extend into the Chaplin River channel and alter channel hydraulics by constricting the channel area. Furthermore, there was a question of whether the berm materials could withstand the high velocities of Chaplin River. Consequently, an in-depth stability analysis was performed which involved excavation of the approach embankment and a relocation of the abutments
Developmental and tissue-specific expression of NITRs
Novel immune-type receptors (NITRs) are encoded by large multi-gene families and share structural and signaling similarities to mammalian natural killer receptors (NKRs). NITRs have been identified in multiple bony fish species, including zebrafish, and may be restricted to this large taxonomic group. Thirty-nine NITR genes that can be classified into 14 families are encoded on zebrafish chromosomes 7 and 14. Herein, we demonstrate the expression of multiple NITR genes in the zebrafish ovary and during embryogenesis. All 14 families of zebrafish NITRs are expressed in hematopoietic kidney, spleen and intestine as are immunoglobulin and T cell antigen receptors. Furthermore, all 14 families of NITRs are shown to be expressed in the lymphocyte lineage, but not in the myeloid lineage, consistent with the hypothesis that NITRs function as NKRs. Sequence analyses of NITR amplicons identify known alleles and reveal additional alleles within the nitr1, nitr2, nitr3, and nitr5 families, reflecting the recent evolution of this gene family
Hamiltonian simulation with optimal sample complexity
© 2017 Author(s). We investigate the sample complexity of Hamiltonian simulation: how many copies of an unknown quantum state are required to simulate a Hamiltonian encoded by the density matrix of that state? We show that the procedure proposed by Lloyd, Mohseni, and Rebentrost [Nat. Phys., 10(9):631-633, 2014] is optimal for this task. We further extend their method to the case of multiple input states, showing how to simulate any Hermitian polynomial of the states provided. As applications, we derive optimal algorithms for commutator simulation and orthogonality testing, and we give a protocol for creating a coherent superposition of pure states, when given sample access to those states. We also show that this sample-based Hamiltonian simulation can be used as the basis of a universal model of quantum computation that requires only partial swap operations and simple single-qubit states.S.K. and C.Y.L. are funded by the Department of Defense. G.H.L. is funded by the NSF CCR and the ARO quantum computing projects. M.O. acknowledges Leverhulme Trust Early Career Fellowship (ECF-2015-256) and European Union project QALGO (Grant Agreement No. 600700) for financial support. T.J.Y. thanks the DoD, Air Force Office of Scientific Research, National Defense Science and Engineering Graduate (NDSEG) Fellowship, 32 CFR 168a. The authors are grateful to the University of Maryland Libraries’ Open Access Publishing Fund and the Massachusetts Institute of Technology Open Access Publishing Fund for partial funding for open access
Racial/Ethnic differences in the prevalence of anxiety using the Vanderbilt ADHD scale in a diverse community outpatient setting
Objective
Pediatric anxiety is prevalent but frequently under-diagnosed compared to other behavioral conditions in primary care practice. Pediatricians routinely screen for attention deficit hyperactivity disorder using the Vanderbilt Rating Scale, which includes a short screen for anxiety. We sought to examine the prevalence of potential anxiety among patients whose parents originally had concerns of disruptive behavior in a diverse setting and examine differences in anxiety across ethnic groups using the Vanderbilt ADHD Diagnostic Rating Scale (VADRS).
Methods
This was a cross-sectional analysis of medical records data of children between the ages of 5–12 years whose parents had concerns of disruptive behavior and received primary care from May 25, 2010 to January 31, 2014 at 2 pediatric community health clinics in Indianapolis.
Results
16% of children whose parents had concerns for disruptive behavior screened positive for anxiety based on the VADRS screen. Hispanic parents were less likely to report symptoms of anxiety (Spanish-speaking: AOR 0.4, 95% CI 0.2 – 0.8; English-speaking: AOR 0.3, 95% CI 0.1 – 0.9) compared to white and black families.
Conclusion
Anxiety is detected at a lower rate among Hispanic pediatric patients using the VADRS. This may suggest differences in the performance of the VADRS among Spanish speaking families
Applying Grover's algorithm to AES: quantum resource estimates
We present quantum circuits to implement an exhaustive key search for the
Advanced Encryption Standard (AES) and analyze the quantum resources required
to carry out such an attack. We consider the overall circuit size, the number
of qubits, and the circuit depth as measures for the cost of the presented
quantum algorithms. Throughout, we focus on Clifford gates as the
underlying fault-tolerant logical quantum gate set. In particular, for all
three variants of AES (key size 128, 192, and 256 bit) that are standardized in
FIPS-PUB 197, we establish precise bounds for the number of qubits and the
number of elementary logical quantum gates that are needed to implement
Grover's quantum algorithm to extract the key from a small number of AES
plaintext-ciphertext pairs.Comment: 13 pages, 3 figures, 5 tables; to appear in: Proceedings of the 7th
International Conference on Post-Quantum Cryptography (PQCrypto 2016
Iluminación eficiente de la Biblioteca Central de la sede Paseo Colón de la Facultad de Ingeniería de la UBA
Entre los objetivos planteados en tres proyectos UBACYT de investigación consecutivos dedicados a atacar distintos aspectos de “el Uso Eficiente de la Energía Eléctrica” (UEEE) se destacan aquellos ligados al tema de la iluminación. Durante su desarrollo se realizaron numerosas auditorias, en particular en el sector comercial y público, destacándose que el rubro iluminación registra el mayor potencial de ahorro. Teniendo en cuenta los resultados y las recomendaciones efectuadas por estas auditorias se realizaron numerosos trabajos para mejorar la iluminación en la sede Paseo Colón de la Facultad de Ingeniería de la Universidad de Buenos Aires (FIUBA). En esta publicación se describe la metodología adoptada en distintos proyectos, en particular en la sala silenciosa de la Biblioteca Central.Between the objectives raised in three projects consecutive UBACYT of investigation dedicated to attack different aspects from Efficient Energy Use those related to the subject of the illumination stand out. During their development numerous audits were made in individual in the commercial and public sector standing out that the illumination registers the greatest potential of saving.
Considering the results and the recommendations conducted in these audits numerous works were made to improve the illumination in the “building Paseo Colon” of the Faculty of Engineering of the University of Buenos Aires (FIUBA). In this publication the methodology adopted in the projects is described and it stands out the last work made on the quiet room of the central library.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES
Iluminación eficiente de la Biblioteca Central de la sede Paseo Colón de la Facultad de Ingeniería de la UBA
Entre los objetivos planteados en tres proyectos UBACYT de investigación consecutivos dedicados a atacar distintos aspectos de “el Uso Eficiente de la Energía Eléctrica” (UEEE) se destacan aquellos ligados al tema de la iluminación. Durante su desarrollo se realizaron numerosas auditorias, en particular en el sector comercial y público, destacándose que el rubro iluminación registra el mayor potencial de ahorro. Teniendo en cuenta los resultados y las recomendaciones efectuadas por estas auditorias se realizaron numerosos trabajos para mejorar la iluminación en la sede Paseo Colón de la Facultad de Ingeniería de la Universidad de Buenos Aires (FIUBA). En esta publicación se describe la metodología adoptada en distintos proyectos, en particular en la sala silenciosa de la Biblioteca Central.Between the objectives raised in three projects consecutive UBACYT of investigation dedicated to attack different aspects from Efficient Energy Use those related to the subject of the illumination stand out. During their development numerous audits were made in individual in the commercial and public sector standing out that the illumination registers the greatest potential of saving.
Considering the results and the recommendations conducted in these audits numerous works were made to improve the illumination in the “building Paseo Colon” of the Faculty of Engineering of the University of Buenos Aires (FIUBA). In this publication the methodology adopted in the projects is described and it stands out the last work made on the quiet room of the central library.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES
The Refined Three-Dimensional Structure of Pectate Lyase E from Erwinia chrysanthemi at 2.2 A Resolution
Iluminación eficiente de la Biblioteca Central de la sede Paseo Colón de la Facultad de Ingeniería de la UBA
Entre los objetivos planteados en tres proyectos UBACYT de investigación consecutivos dedicados a atacar distintos aspectos de “el Uso Eficiente de la Energía Eléctrica” (UEEE) se destacan aquellos ligados al tema de la iluminación. Durante su desarrollo se realizaron numerosas auditorias, en particular en el sector comercial y público, destacándose que el rubro iluminación registra el mayor potencial de ahorro. Teniendo en cuenta los resultados y las recomendaciones efectuadas por estas auditorias se realizaron numerosos trabajos para mejorar la iluminación en la sede Paseo Colón de la Facultad de Ingeniería de la Universidad de Buenos Aires (FIUBA). En esta publicación se describe la metodología adoptada en distintos proyectos, en particular en la sala silenciosa de la Biblioteca Central.Between the objectives raised in three projects consecutive UBACYT of investigation dedicated to attack different aspects from Efficient Energy Use those related to the subject of the illumination stand out. During their development numerous audits were made in individual in the commercial and public sector standing out that the illumination registers the greatest potential of saving.
Considering the results and the recommendations conducted in these audits numerous works were made to improve the illumination in the “building Paseo Colon” of the Faculty of Engineering of the University of Buenos Aires (FIUBA). In this publication the methodology adopted in the projects is described and it stands out the last work made on the quiet room of the central library.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES
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