cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A STUDY OF SCHOOL DISTRICT/COMMUNITY ATTRIBUTES AND COMPUTER-RELATED EDUCATION POLICY IN PUBLIC SCHOOLS OF THE STATE OF MARYLAND
Creators: name: Connolly, Frank W.
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3904
subject: Specialist studies in education

description: Using a survey methodology the study investigated the correlation between community and school district characteristics and the LEA's involvement with the instructional use of computers in Maryland's twenty-four (24) school districts. The investigation included interviews with staff professionals from the Maryland State Department of Education, and representatives from all twenty-four districts, as well as the review of national, state and school district reports and surveys. Study findings indicate a lack of accurate data on both the state and LEA level regarding instructional computing. These include: (1) Enrollment statistics relating patterns on racial and gender basis; (2) Number and type of courses in which computers are used as an instructional tool; (3) Accurate inventories of computer resources (both hardware and software); and (4) Revenue and expenditure data clearly attributable to instructional computing. There are four (4) statistically significant correlations between district and community characteristics and the LEAs' involvement in instructional computing: (1) The number of students in a district has a positive correlation to the number of subjects in which computers are used (R(,s) = 0.7498) and to the number of professional staff officially involved in supervising or coordinating instructional computing (R(,s) = 0.6187); (2) The Property Tax Rate in a community has a positive correlation to the number of subjects in which computers are used (R(,s) = 0.5122) and to the number of professional staff officially involved in supervising or coordinating instructional computing (R(,s) = 0.4272); (3) The Per Capita Income in a community has a positive correlation to the number of subjects in which computers are used (R(,s) = 0.5185) and to the number of professional staff officially involved in supervising or coordinating instructional computing (R(,s) = 0.4639); and (4) The percent of majority (i.e. white) students enrolled in a school district has a positive correlation to the percent of teachers who have received training in computing (R(,s) = 0.3602).
Assisting Bug Report Assignment Using Automated Fault Localisation: An Industrial Case Study
Creators: name: Sohn, Jeongju
name: An, Gabin
name: Hong, Jingun
name: Hwang, Dongwon
name: Yoo, Shin
Publisher: name: Zenodo
Year: 2021

description: We present a case study of an industry scale application of automated fault localisation to SAP HANA2 database. When a test breaks in the Continuous Integration (CI) pipeline, the bug needs to be triaged and assigned to the appropriate development team. Given the scale and complexity of SAP HANA2, the assignment itself can be a challenging task. The current practice depends on the static mapping between test scripts and software components, as well as human domain knowledge. We apply automated fault localisation to aid the issue allocation in the CI pipeline: once a test failure is observed, the automated fault localisation technique identifies the suspicious software component using the information from the test failure. The localisation result can be used by the issue manager to allocate the incoming test failure issues more efficiently. We have analysed 137 CI test executions with at least one failing test script using Spectrum Based Fault Localisation. The results show that automated fault localisation can identify the faulty software component for 61 out of 137 studied test failures within top 10 places out of over 200 components. Out of the 61 faults, 36 faults were not identifiable based on the static mapping between test script and software components at all.
Non-tariff Barriers to Trade: What Does the Experience of Guyanese Exporters of Food and Agriculture Products Reveal?
Creators: name: DaSilva Glasgow, Dianna
name: Hosein, Roger
name: DaSilva Glasgow, Dianna
name: Hosein, Roger
Publisher: name: Unknown
Year: 2018
Subjects: subject: International Relations/Trade
subject: burdensome
subject: exports
subject: food and agriculture
subject: Guyana

description: This article reports on the results of a survey conducted among exporters of food and agriculture products from Guyana to determine what regulations exporters consider burdensome to comply with when exporting. Using simple and stratified sampling techniques, we surveyed 74 exporters, covering micro/small, medium and large firms in ten food and agriculture subsectors. The results suggest that exports are hindered not so much by the technical requirements of export markets, but rather by the institutional inefficiencies that prevail in local agencies that play a role in the export process, particularly as it relates to obtaining certification and undergoing inspection.
Quantum State Control via Trap-induced Shape Resonance in Ultracold Atomic Collisions
Creators: name: Stock, R.
name: Bolda, E. L.
name: Deutsch, I. H.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We investigate controlled collisions between trapped but separated ultracold atoms. The interaction between atoms is treated self-consistently using an energy-dependent delta-function pseudopotential model, whose validity we establish. At a critical separation, a "trap-induced shape resonance" between a molecular bound states and a vibrational eigenstate of the trap can occur. This resonance leads to an avoided crossing in the eigenspectrum as a function of separation. We investigate how this new resonance can be employed for quantum control.
description: 4 pages, 3 figures, RevTeX; final version
Collider Probes of Real Triplet Scalar Dark Matter
Creators: name: Chiang, Cheng-Wei
name: Cottin, Giovanna
name: Du, Yong
name: Fuyuto, Kaori
name: Ramsey-Musolf, Michael J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study discovery prospects for a real triplet extension of the Standard Model scalar sector at the Large Hadron Collider (LHC) and a possible future 100 TeV $pp$ collider. We focus on the scenario in which the neutral triplet scalar is stable and contributes to the dark matter relic density. When produced in $pp$ collisions, the charged triplet scalar decays to the neutral component plus a soft pion or soft lepton pair, yielding a disappearing charged track in the detector. We recast current 13TeV LHC searches for disappearing tracks, and find that the LHC presently excludes a real triplet scalar lighter than 248 (275) GeV, for a mass splitting of 172 (160) MeV with $\mathcal{L}=\rm36\,$fb$^{-1}$. The reach can extend to 497 (520) GeV with the collection of $3000\,$fb$^{-1}$. We extrapolate the 13 TeV analysis to a prospective 100 TeV $pp$ collider, and find that a $\sim3$ TeV triplet scalar could be discoverable with $\mathcal{L}=30$ ab$^{-1}$, depending on the degree to which pile up effects are under control. We also investigate the dark matter candidate in our model and corresponding present and prospective constraints from dark matter direct detection. We find that currently XENON1T can exclude a real triplet dark matter lighter than $\sim3$ TeV for a Higgs portal coupling of order one or larger, and the future XENON20T will cover almost the entire dark matter viable parameter space except for vanishingly small portal coupling.
description: 27 pages, 8 plots; match the published version
Trends in Food Recalls: 2004-13
Creators: name: Page, Elina Tselepidakis
name: Page, Elina Tselepidakis
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: food safety
subject: food recalls
subject: Food and Drug Administration
subject: Food Safety
subject: Inspection Service

description: This report identifies trends, patterns, and outliers of food product recalls in the United States from 2004 through 2013. The analysis considers four factors: the types of foods being recalled, the reasons for initiating the recalls, the severity of the risks posed by the recalled products, and the geographic distribution. The results reveal that recall events increased across several major aggregate food categories (grain products, animal products, and prepared foods and meals), increased across all three risk severity classes, and occurred more frequently in highly populated States. Additionally, undeclared allergens were a leading cause of food product recalls, with the number of undeclared allergen recalls nearly doubling over the decade. Last, ingredient-driven recall events were the source of several extreme time trend outliers.
Active Interaction Force Control for Contact-Based Inspection with a Fully Actuated Aerial Vehicle
Creators: name: Bodie, Karen
name: Brunner, Maximilian
name: Pantic, Michael
name: Walser, Stefan
name: Pfändler, Patrick
name: Angst, Ueli
name: Siegwart, Roland
name: Nieto, Juan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper presents and validates active interaction force control and planning for fully actuated and omnidirectional aerial manipulation platforms, with the goal of aerial contact inspection in unstructured environments. We present a variable axis-selective impedance control which integrates direct force control for intentional interaction, using feedback from an on-board force sensor. The control approach aims to reject disturbances in free flight, while handling unintentional interaction, and actively controlling desired interaction forces. A fully actuated and omnidirectional tilt-rotor aerial system is used to show capabilities of the control and planning methods. Experiments demonstrate disturbance rejection, push-and-slide interaction, and force controlled interaction in different flight orientations. The system is validated as a tool for non-destructive testing of concrete infrastructure, and statistical results of
description: 14 pages, 17 figures
Analysis of Two Scenarios for the Early Optical Emission of the GRB Afterglows 990123 and 021211
Creators: name: Panaitescu, A.
name: Kumar, P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The optical light-curves of GRB afterglows 990123 and 021211 exhibit a steep decay at 100--600 seconds after the burst, the decay becoming slower after about 10 minutes. We investigate two scenarios for the fast decaying early optical emission of these GRB afterglows. In the reverse-forward shock scenario, this emission arises in the reverse shock crossing the GRB ejecta, the mitigation of the light-curve decay occurring when the forward shock emission overtakes that from the reverse shock. Both a homogeneous and wind-like circumburst medium are considered. In the wind-bubble scenario, the steeply decaying, early optical emission arises from the forward shock interacting with a 1/r^2 bubble, with a negligible contribution from the reverse shock, the slower decay starting when the blast wave reaches the bubble termination shock and enters a homogeneous region of the circumburst medium. We determine the shock microphysical parameters, ejecta kinetic energy, and circumburst density which accommodate the radio and optical measurements of the GRB afterglows 990123 and 021211. We find that, for a homogeneous medium, the radio and optical emissions of the afterglow 990123 can be accommodated by the reverse-forward shock scenario if the microphysical parameters behind the two shocks differ substantially. A wind-like circumburst medium also allows the reverse-forward shocks scenario to account for the radio and optical properties of the afterglows 990123 and 021211, but the required wind densities are at least 10 times smaller than those of Galactic Wolf-Rayet stars. The wind-bubble scenario requires a variation of the microphysical parameters when the afterglow fireball reaches the wind termination shock, which seems a contrived feature.
description: 13 pages, MNRAS, in press
Development the Physical Properties of Polymeric Blend (SR PMMA) by Adding various Types of Nanoparticles
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 91299 Materials Engineering not elsewhere classified
subject: FOS: Materials engineering

description: As maxillofacial defects increased due to cancer; it became necessary to select high-quality prosthetic materials in this field. Silicone rubber is widely used in damaged maxillofacial affected areas replacement surgery as bio material. The aim of this research, prepared a nano composites materials, from polymer blend (silicone rubber: 5% PMMA) reinforced by different types of nano-powders; pomegranate Peels Powder (PPP), Seeds powder of dates Ajwa (SPDA) and TiO2 nano-powders with loading level (0.0, 0.1, 0.2, 0.3 and 0.4%). Some physical properties such as density, water absorption, and Thermo-Physical test, FTIR analysis, as well as, FTIR, antibacterial tests were done on prepared samples. The results showed that the composites material based of polymer blend with optimum percent are of 0.2% of pomegranate Peels Powder (PPP), 0.3% of Seeds powder of dates Ajwa (SPDA) and 0.1% of TiO2 nano-powders that have ideal characteristic. Also for antibacterial tests, polymeric blend composites with optimum percent of this nano-powders show that more antibacterial efficiency against S.aureus bacteria than E.coli bacteria.
Identifying mobile health technology experiences and preferences of low-income pregnant women with diabetes
Creators: name: Birch, Eleanor
name: Leziak, Karolina
name: Jackson, Jenise
name: Strohbach, Angelina
name: Niznik, Charlotte
name: Yee, Lynn M
Publisher: name: DigitalHub. Galter Health Sciences Library & Learning Center
Year: 2021
Subjects: subject: behavioral intervention
subject: diabetes
subject: mobile health
subject: pregnancy
subject: smartphone
subject: Diabetes Mellitus
subject: Psychosocial Intervention
subject: Pregnancy
subject: Smartphone
subject: Telemedicine

description: BACKGROUND: Rapid expansion of mobile technology has resulted in the development of many mobile health ("mHealth") platforms for health monitoring and support. However, applicability, desirability, and tailoring of these platforms for pregnant women, particularly in populations who experience the greatest health inequitiessuch  as women with diabetes mellitus (DM) and/or those with greater socioeconomic barriersremains unknown. The objective is to understand low-income pregnant women's experiences and preferences for mHealth tools to support pregnancy and improve DM self-management. METHODS: Low-income pregnant and postpartum women were included in individual interviews or focus groups; women with and without type 2 or gestational DM were included. Analysis was performed with the constant comparison method. RESULTS: In this population of 45 (N=37 with DM) low-income, largely minority, pregnant and postpartum women, 100% reported access to smartphones and prior experience with apps. Interest in mHealth to support health and engagement during pregnancy was high. Preferences for general mHealth features included education that reduces uncertainty, support communities, visualizing progress, convenient access to information, and support for better management of pregnancy-related tasks. Preferred design elements included personalization, interactive features, and integrated graphics. Women with DM expressed multiple additional DM-specific needs, including support tools for DM self-management and self-regulation tasks.
Low-Loss Reconfigurable Phase Shifter in Gap-Waveguide Technology for mm-Wave Applications
Creators: name: Palomares-Caballero, Á.
name: Alex-Amor, A.
name: Escobedo, P.
name: Valenzuela-Valdés, J.
name: Padilla, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this brief, we present a low-loss mechanically reconfigurable phase shifter implemented in gap-waveguide technology for mm-wave frequencies. The proposed design gives a practical implementation of tuning elements inside the waveguide providing alternatives to the use of the E-plane split waveguide at high frequencies in order to avoid leakage losses. The depicted phase shifter design is based on a H-plane split waveguide. The phase shift is controlled by means of a tuning screw, which exerts pressure on a flexible metallic strip inserted inside the waveguide. The flexible strip bends with different curvature radii and determines the phase shift at the output port. Cost-effective manufacturing and simple implementation of the flexible metallic strip are achieved by means of the gap-waveguide design. A prototype has been manufactured for validation purposes. Good impedance matching is achieved from 64 GHz to 75 GHz providing a 15.8% impedance bandwidth. The results show a maximum phase shift of 250$^{o}$ with a maximum and mean insertion loss (IL) of 3 dB and 1.7 dB, respectively.
Investigation the Properties of Silicone Rubber Blend Reinforced by natural nanoparticles and UHMWPE
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 91299 Materials Engineering not elsewhere classified
subject: FOS: Materials engineering

description: Many faces are exposed to degradation, discoloration, changes in humidity. The primary objective has improved some properties of that used for restoring of esthetic. In the present research different lengths chopped and continuoushigh molecular weight polyeth percentage (0.0, 0.2% and0.2% Pomegranate Peels Powder (PPP)) for developing the properties of silicone rubber used for the maxillofacial prosthesis applications. physical properties were done on the all prepared samples properties have improved when added 0.5% ratio of continuous UHMWPE fiber to polymer blend nanocomposite (95%SR /5%PMMA: 0.2% Pomegranate Peels Powder (PPP)) sample and this represent composite sample. Therefore, properties required for the applications of maxillofacial prosthetics.
A STUDY OF SCHOOL DISTRICT/COMMUNITY ATTRIBUTES AND COMPUTER-RELATED EDUCATION POLICY IN PUBLIC SCHOOLS OF THE STATE OF MARYLAND
Creators: name: Connolly, Frank W.
Publisher: name: American University
Year: 2023

description: Using a survey methodology the study investigated the correlation between community and school district characteristics and the LEA's involvement with the instructional use of computers in Maryland's twenty-four (24) school districts. The investigation included interviews with staff professionals from the Maryland State Department of Education, and representatives from all twenty-four districts, as well as the review of national, state and school district reports and surveys. Study findings indicate a lack of accurate data on both the state and LEA level regarding instructional computing. These include: (1) Enrollment statistics relating patterns on racial and gender basis; (2) Number and type of courses in which computers are used as an instructional tool; (3) Accurate inventories of computer resources (both hardware and software); and (4) Revenue and expenditure data clearly attributable to instructional computing. There are four (4) statistically significant correlations between district and community characteristics and the LEAs' involvement in instructional computing: (1) The number of students in a district has a positive correlation to the number of subjects in which computers are used (R(,s) = 0.7498) and to the number of professional staff officially involved in supervising or coordinating instructional computing (R(,s) = 0.6187); (2) The Property Tax Rate in a community has a positive correlation to the number of subjects in which computers are used (R(,s) = 0.5122) and to the number of professional staff officially involved in supervising or coordinating instructional computing (R(,s) = 0.4272); (3) The Per Capita Income in a community has a positive correlation to the number of subjects in which computers are used (R(,s) = 0.5185) and to the number of professional staff officially involved in supervising or coordinating instructional computing (R(,s) = 0.4639); and (4) The percent of majority (i.e. white) students enrolled in a school district has a positive correlation to the percent of teachers who have received training in computing (R(,s) = 0.3602).
Thermal chaos of a charged dilaton-AdS black hole in the extended phase space
Creators: name: Dai, Chaoqun
name: Chen, Songbai
name: Jing, Jiliang
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have studied thermal chaotic behavior in the extended phase space for a charged dilaton-AdS black hole by Melnikov method and present the effect of dilaton parameter on the thermal chaos. Our result show that for the temporal perturbation the thermal chaos in the charged dilaton-AdS black hole occurs only if the perturbation amplitude is larger than certain a critical value, but for the spatially perturbation, the chaos always exists irrespective of perturbation amplitude. These behaviors are similar to those in other AdS black hole, which can be regarded as the common features of the static AdS black holes. Moreover, we also find that the critical temporal perturbation amplitude leading to chaos increases with the dilaton parameter and decreases with the charge. This means that under the temporal perturbation the presence of dilaton parameter makes the onset of chaos more difficult, which differs from that of the charge parameter.
description: 16 pages,7 figures, Accepted for publication in EPJC
PURIFICATION OF NMU I AND STUDIES ON THE ROLE OF ARGININE RESIDUE AND METAL ION REQUIREMENT BY RESTRICTION ENZYME
Creators: name: Min, Byung Kil
Publisher: name: American University
Year: 2023

description: A new restriction enzyme, Nmu I, has been purified from Neisseria mucosa to near homogeneity by the simple procedures of phosphocellulose and heparin agarose column chromatography. The enzyme was pure enough to be used in cloning experiments and DNA sequencing work. The cutting site of Nmu I, 5' -GC(DARR)CGGC- 3', has been determined by computer analysis of the cleavage pattern on substrates. Nmu I has a single cleavage site on SV40 DNA, and it will therefore be useful for eukaryotic gene cloning. In order to study the interaction between the restriction enzymes and nucleic acids, arginyl residues of the specific endonucleases have been modified by butanedione. As an arginine specific reagent, butanedione has been known to possess inhibitory effects in enzymes that contain either a nucleotide or a phosphate binding site. Eighteen enzymes out of twenty one restriction enzymes tested have exhibited a loss of activity upon modification. This might indicate that an arginine residue in proteins has been involved in forming an enzyme/nucleic acid complex as a key element of the catalytic or binding site of restriction endonuclease. It is well accepted that the magnesium ion is required for the action of restriction enzymes, but the exact role of the metal ion is not understood fully. To investigate the effects of metal ions in the process of specific endonuclease action, Mg('++) was replaced with Ca('++) and the transition metal ions, Co('++), Cu('++), Mn('++) and Zn('++). In the presence of Co('++), Mn('++) and Zn('++) most of the restriction enzymes tested demonstrated the same cleavage pattern on the appropriate substrate except Eco RI which has been known to exhibit relaxation of the recognition sequences with Mn('++). It is reasonable to assume that the metal ions form a coordinated complex with the nucleotides in a recognition sequence, which would become a proper target for action of specific endonucleases.
Optical pumping NMR in the compensated semiconductor InP:Fe
Creators: name: Goto, Atsushi
name: Hashi, Kenjiro
name: Shimizu, Tadashi
name: Miyabe, Ryo
name: Wen, Xiaogang
name: Ohki, Shinobu
name: Machida, Susumu
name: Iijima, Takahiro
name: Kido, Giyuu
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The optical pumping NMR effect in the compensated semiconductor InP:Fe has been investigated in terms of the dependences of photon energy (E_p), helicity (sigma+-), and exposure time (tau_L) of infrared lights. The {31}P and {115}In signal enhancements show large sigma+- asymmetries and anomalous oscillations as a function of E_p. We find that (i) the oscillation period as a function of E_p is similar for {31}P and {115}In and almost field independent in spite of significant reduction of the enhancement in higher fields. (ii) A characteristic time for buildup of the {31}P polarization under the light exposure shows strong E_p-dependence, but is almost independent of sigma+-. (iii) The buildup times for {31}P and {115}In are of the same order (10^3 s), although the spin-lattice relaxation times (T_1) are different by more than three orders of magnitude between them. The results are discussed in terms of (1) discrete energy spectra due to donor-acceptor pairs (DAPs) in compensated semiconductors, and (2) interplay between {31}P and dipolar ordered indium nuclei, which are optically induced.
description: 8 pages, 6 figures, submitted to Physical Review B
APRIL : a novel Algorithm for Particle Reconstruction at ILC
Creators: name: Li, B.
name: Été, R.
name: Grenier, G.
name: Laktineh, I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The current developments for future electron-positron colliders are driven by the Particle Flow concept. In these developments, high granularity calorimeters play a central role. This presentation will focus on a new Particle Flow Algorithm (PFA) developed for high granularity calorimeters, and especially for the Semi-Digital Hadronic CALorimeter (SDHCAL) option of the International Large Detector (ILD) project. The first PFA for ILD was PandoraPFA. This new PFA (APRIL) is based on the PandoraPFA Software Development Kit, but implements a different clustering inspired from the ARBOR PFA approach. This proceeding will describe briefly the APRIL algorithm and discuss its performance against that of PandoraPFA.
description: 6 pages, 5 figures, proceeding for third conference on Calorimetry for the High Energy Frontier (CHEF), November 25-29, 2019, Kyushu University, Fukuoka, Japan
Enabling Accuracy-Aware Quantum Compilers using Symbolic Resource Estimation
Creators: name: Meuli, Giulia
name: Soeken, Mathias
name: Roetteler, Martin
name: Häner, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Emerging Technologies (cs.ET)
subject: Programming Languages (cs.PL)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Approximation errors must be taken into account when compiling quantum programs into a low-level gate set. We present a methodology that tracks such errors automatically and then optimizes accuracy parameters to guarantee a specified overall accuracy while aiming to minimize the implementation cost in terms of quantum gates. The core idea of our approach is to extract functions that specify the optimization problem directly from the high-level description of the quantum program. Then, custom compiler passes optimize these functions, turning them into (near-)symbolic expressions for (1) the total error and (2) the implementation cost (e.g., total quantum gate count). All unspecified parameters of the quantum program will show up as variables in these expressions, including accuracy parameters. After solving the corresponding optimization problem, a circuit can be instantiated from the found solution. We develop two prototype implementations, one in C++ based on Clang/LLVM, and another using the Q# compiler infrastructure. We benchmark our prototypes on typical quantum computing programs, including the quantum Fourier transform, quantum phase estimation, and Shor's algorithm.
description: 26 pages
PURIFICATION OF NMU I AND STUDIES ON THE ROLE OF ARGININE RESIDUE AND METAL ION REQUIREMENT BY RESTRICTION ENZYME
Creators: name: Min, Byung Kil
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 34
subject: Chemical sciences
subject: FOS: Chemical sciences

description: A new restriction enzyme, Nmu I, has been purified from Neisseria mucosa to near homogeneity by the simple procedures of phosphocellulose and heparin agarose column chromatography. The enzyme was pure enough to be used in cloning experiments and DNA sequencing work. The cutting site of Nmu I, 5' -GC(DARR)CGGC- 3', has been determined by computer analysis of the cleavage pattern on substrates. Nmu I has a single cleavage site on SV40 DNA, and it will therefore be useful for eukaryotic gene cloning. In order to study the interaction between the restriction enzymes and nucleic acids, arginyl residues of the specific endonucleases have been modified by butanedione. As an arginine specific reagent, butanedione has been known to possess inhibitory effects in enzymes that contain either a nucleotide or a phosphate binding site. Eighteen enzymes out of twenty one restriction enzymes tested have exhibited a loss of activity upon modification. This might indicate that an arginine residue in proteins has been involved in forming an enzyme/nucleic acid complex as a key element of the catalytic or binding site of restriction endonuclease. It is well accepted that the magnesium ion is required for the action of restriction enzymes, but the exact role of the metal ion is not understood fully. To investigate the effects of metal ions in the process of specific endonuclease action, Mg('++) was replaced with Ca('++) and the transition metal ions, Co('++), Cu('++), Mn('++) and Zn('++). In the presence of Co('++), Mn('++) and Zn('++) most of the restriction enzymes tested demonstrated the same cleavage pattern on the appropriate substrate except Eco RI which has been known to exhibit relaxation of the recognition sequences with Mn('++). It is reasonable to assume that the metal ions form a coordinated complex with the nucleotides in a recognition sequence, which would become a proper target for action of specific endonucleases.
Gestational age specific birth weight curve for Asian Indian Newborns
Creators: name: Teji, Jagjit Singh
name: Eldeirawi, Kamal
Publisher: name: DigitalHub. Galter Health Sciences Library
Year: 2004
Subjects: subject: Asian Indian Newborn Infants
subject: Gestation
subject: Birth Weight
subject: Infant, Newborn
subject: Birth Weight
subject: Gestational Age
subject: East Indians
subject: United States

description: The number of newborns of the Asian Indian (AI) origin have increased in last decade to over 40,000 per year in the US, according to the NCHS. In order to accurately assess the effects of the gestational pathologies such as gestational diabetes and preeclampsia, etc, on the fetus there needs to be a gestational age (GA) specific birth weight (BWT) curve of the normal AI babies. For example, an AI large for gestation (LGA) may never meet the birth weight criteria established by curves for the majority of the babies born in the US. It is well known in the literature that newborns of AI origin weigh less than the white and black ethnicities but the percentile curve is lacking. The objective of this study is to create a GA specific BWT curve for AI newborns and compare it to the non-hispanic white (NHW) babies
THE EDUCATIONAL NEEDS OF ADOPTIVE PARENTS (ADOLESCENTS, ATTITUDES, SELF-ESTEEM, FAMILY RELATIONSHIPS)
Creators: name: Ross, Marlene
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3901
subject: Curriculum and pedagogy

description: The field of adoption has been changing rapidly. Is there a need for special preparation for adoptive parents?; The purpose of this study was to explore the educational needs of adoptive adolescents. In addition, the study examined the relationship between adoptive parent education and adopted adolescents' self-esteem, attitudes toward family and attitudes toward adoption. Thirty families in the metropolitan Washington, D.C. area volunteered to be interviewed. Each family had one or more adopted children between the ages of 13 and 18. Parents were interviewed as a unit and each of 38 adopted adolescents was interviewed separately. One-third of the families had no early adoptive education; two-thirds had participated in one or more adoptive education activities before they adopted or when their child was young. Parents who had participated in early adoptive education activities were generally more open about adoption with their children, and more readily acknowledged the difference between raising an adopted and a birth child. They were more aware that children's adoptive status may make a difference in their lives, were more receptive to learning more about adoption and its impact on their children, and expressed a more positive attitude toward the value of adoptive education. Families with adopted children only participated in greater number of early adoptive education activities than did families with both adopted and birth children. Compared to families with birth and adopted children, families with adopted children only expressed a greater need for information about adoption and its effects, indicated a greater willingness to participate in adoptive education activities and were more aware of the differences between raising an adopted and a birth child. Adolescents in families with adopted children only were more positive toward their family, had fewer concerns about their birth parents and thought about them less often, although they had similar self-esteem scores to adopted adolescents in families with birth and adopted children. Since adoptive education is desired by some parents and has beneficial effects for both parents and children, more educational opportunities should be made available.
The impact of spheroid stars for Macho microlensing surveys of the Andromeda Galaxy
Creators: name: Kerins, E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Andromeda Galaxy (M31) is an important test case for a number of microlensing surveys looking for massive compact halo objects (Machos). A long-standing theoretical prediction is that the high inclination of the M31 disk should induce an asymmetry in the spatial distribution of M31 Macho events, whilst the distribution of variable stars and microlensing events in the M31 disk should be symmetric. We examine the role of stars in the M31 visible spheroid as both lenses and sources to microlensing events. We compute microlensing event number density maps and estimate pixel-lensing rates and event durations for three-component models of M31 which are consistent with the observed rotation curve, surface brightness profile and dynamical mass estimates. Three extreme models are considered: a massive spheroid model; a massive disk model; and a massive Macho halo model. An important consequence of the spheroid is that, even if Machos are absent in M31, an asymmetric spatial signature is still generally expected from stellar lensing alone. The relative mass-to-light ratio of the spheroid and disk populations controls which of these signatures dominates the overall stellar spatial distribution. We find that the inclusion of the spheroid weakens the M31 Macho spatial asymmetry by about 20-30% over a disk-only asymmetry for the models considered. We also find for our models that Machos dominate over most of the far disk provided they contribute at least ~25% of the halo dark matter density. The presence of the spheroid also has beneficial consequences for M31 lensing surveys. The stellar asymmetry is likely to be important in distinguishing between a spheroidal Macho halo or a highly flattened halo or dark matter dominated disk, since spatial asymmetries of opposing signs are expected in these cases. (Abridged)
description: 10 pages. Accepted for publication in MNRAS
Remembering Graduates of the Northwestern University Woman's Medical School
Creators: name: Sims, Ronald H
Publisher: name: DigitalHub. Galter Health Sciences Library
Year: 2013
Subjects: subject: alumnus
subject: alumnae
subject: Northwestern University Medical School
subject: Northwestern University Woman's Medical School
subject: Schools, Medical
subject: History of Medicine
subject: Physicians, Women
subject: Northwestern University (Evanston, Ill.). Woman's Medical School

description: This article is part of an occasional series prepared by Galter librarians on the history of and highlights about various Northwestern University health profession programs and their alumni. Other articles were about Northwestern University's medical, woman's medical, dental, nursing schools, and pharmacy schools. (This historical overview was originally published in the Galter Library's website in honor of National Women's History Month, October 2013.) Features highlights of the lives and careers of: Emma Ann Reynolds (1862-1917); Julia L. Woodzicka (1865-1948); Lucy Alice Gaynor (1861-1911).
THE EDUCATIONAL NEEDS OF ADOPTIVE PARENTS (ADOLESCENTS, ATTITUDES, SELF-ESTEEM, FAMILY RELATIONSHIPS)
Creators: name: Ross, Marlene
Publisher: name: American University
Year: 2023

description: The field of adoption has been changing rapidly. Is there a need for special preparation for adoptive parents?; The purpose of this study was to explore the educational needs of adoptive adolescents. In addition, the study examined the relationship between adoptive parent education and adopted adolescents' self-esteem, attitudes toward family and attitudes toward adoption. Thirty families in the metropolitan Washington, D.C. area volunteered to be interviewed. Each family had one or more adopted children between the ages of 13 and 18. Parents were interviewed as a unit and each of 38 adopted adolescents was interviewed separately. One-third of the families had no early adoptive education; two-thirds had participated in one or more adoptive education activities before they adopted or when their child was young. Parents who had participated in early adoptive education activities were generally more open about adoption with their children, and more readily acknowledged the difference between raising an adopted and a birth child. They were more aware that children's adoptive status may make a difference in their lives, were more receptive to learning more about adoption and its impact on their children, and expressed a more positive attitude toward the value of adoptive education. Families with adopted children only participated in greater number of early adoptive education activities than did families with both adopted and birth children. Compared to families with birth and adopted children, families with adopted children only expressed a greater need for information about adoption and its effects, indicated a greater willingness to participate in adoptive education activities and were more aware of the differences between raising an adopted and a birth child. Adolescents in families with adopted children only were more positive toward their family, had fewer concerns about their birth parents and thought about them less often, although they had similar self-esteem scores to adopted adolescents in families with birth and adopted children. Since adoptive education is desired by some parents and has beneficial effects for both parents and children, more educational opportunities should be made available.
THE TARGET EFFICIENCY OF LIFELINE ELECTRICITY PRICING AND OTHER ENERGY SUBSIDY PROGRAMS: A SURVEY-BASED POLICY ANALYSIS (DISTRICT OF COLUMBIA, UTILITY ECONOMICS, RATEMAKING, D.C. PUBLIC SERVICE COMMISSION, LIHEAP (LOW INCOME HOME ENERGY ASSISTANCE PROGRAM))
Creators: name: Toulmin, Llewellyn Morgan
Publisher: name: American University
Year: 2023

description: This dissertation evaluates three types of subsidy programs designed to aid low-income residential electricity customers. The three programs are a "lifeline" rate system, which extends a "lifeline" of 450 KWH per month of low-cost electricity to consumers for essential uses; a payments to suppliers program; and a price discount program. Using a telephone survey of nine hundred District of Columbia residents, the study employs a path analysis, calculations of income elasticities, and estimates of the number of poor and non-poor customers consuming above and below the lifeline breakpoint to evaluate the horizontal and vertical equity of the three programs. The path analysis utilizes twelve independent variables: appliance stock; insulation quality; conservation attitude; physical size of dwelling; number of persons home during the day; household size; age, sex, race, and education of billpayer; home ownership; and annual household income. The dependent variable is annual KWH consumption. The path analysis shows that the direct effect of income on KWH consumption is 0.225 (standardized beta weight), and the indirect effect is 0.105. The indirect effect is largely composed of causal paths from income to usage via appliance stock and physical size of dwelling. Rating the three programs in terms of vertical and horizontal equity shows that all programs have substantial drawbacks. Recommendations include the abolition of the lifeline and price discount programs, the alteration of the payments to suppliers program to include more program eligibles, and the changing of the payments to suppliers program into a direct cash grant program. The implications of the study for larger issues--such as the effect of consumer advocates on utility commission agenda setting and policy outputs, and the prospects for substantial deregulation--are also discussed.
The Spatial Evolution of Young Massive Clusters II. Looking for Imprints of Star Formation in NGC 2264 with Gaia DR2
Creators: name: Buckner, Anne S. M.
name: Khorrami, Zeinab
name: Gonzalez, Marta
name: Lumsden, Stuart L.
name: Moraux, Estelle
name: Oudmaijer, Rene D.
name: Clark, Paul
name: Joncour, Isabelle
name: Blanco, Jose Manuel
name: de la Calle, Ignacio
name: Hacar, Alvaro
name: Herrera-Fernandez, Jose M.
name: Motte, Frederique
name: Salgado, Jesus
name: Valero-Martin, Luis
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Aims. To demonstrate that `INDICATE' is a powerful spatial analysis tool which when combined with kinematic data from Gaia DR2 can be used to robustly probe star formation history. Methods. We compared the dynamic & spatial distributions of young stellar objects (YSOs) at various evolutionary stages in NGC 2264 using Gaia DR2 proper motion data and INDICATE. Results. The dynamic & spatial behaviours of YSOs at different evolutionary stages are distinct. Dynamically, Class II YSOs predominately have non-random trajectories that are consistent with known substructures, whereas Class III YSOs have random trajectories with no clear expansion or contraction patterns. Spatially, there is a correlation between the evolutionary stage and source concentration: 69.4% of Class 0/I, 27.9% of Class II, and 7.7% of Class III objects are found to be clustered. The proportion of YSOs clustered with objects of the same class also follows this trend. Class 0/I objects are both found to be more tightly clustered with the general populous/objects of the same class than Class IIs and IIIs by a factor of 1.2/4.1 and 1.9/6.6, respectively. An exception to these findings is within 0.05deg of S Mon where Class III objects mimic the behaviours of Class II sources across the wider cluster region. Our results suggest (i) current YSOs distributions are a result of dynamical evolution, (ii) prolonged star formation has been occurring sequentially, and (iii) stellar feedback from S Mon is causing YSOs to appear as more evolved sources. Conclusions. Designed to provide a quantitative measure of clustering behaviours, INDICATE is a powerful tool with which to perform rigorous spatial analyses. Our findings are consistent with what is known about NGC 2264, effectively demonstrating that when combined with kinematic data from Gaia DR2 INDICATE can be used to robustly study the star formation history of a cluster.
description: 13 pages, 4 figures, 5 tables, Accepted for publication in A&A
"Gaugomaly" Mediated SUSY Breaking and Conformal Sequestering
Creators: name: Sundrum, Raman
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Anomaly-mediated supersymmetry breaking in the context of 4D conformally sequestered models is combined with Poppitz-Trivedi D-type gauge-mediation. The implementation of the two mediation mechanisms naturally leads to visible soft masses at the same scale so that they can cooperatively solve the mu and flavor problems of weak scale supersymmetry, as well as the tachyonic slepton problem of pure anomaly-mediation. The tools are developed in a modular fashion for more readily fitting into the general program of optimizing supersymmetric dynamics in hunting for the most attractive weak scale phenomenologies combined with Planck-scale plausibility.
description: 14 pages, Latex
title: Visitors by railway to the Great Exhibition of 1851
Creators: name: Rae, A.B.
Publisher: name: The Open University
Year: 1987

description: This is an examination of the visitors to the Great Exhibition of 1851 in an attempt to establish whether large numbers of people from the provinces did actually travel to London on the recently-established railway network. Some four million passengers, over and above the normal increase in numbers which was taking place each year as the network expanded, used the railways in 1851 and there is evidence that the vast majority of them were visitors to the Great Exhibition. This was the greatest movement of population in such a concentrated period of time ever to have taken place in Britain up to that date. Such a movement could not have taken place without the railway. Although the railway companies, with their growing experience of excursion traffic, did prepare for increased traffic, its scale was beyond their expectations. But the traffic was handled with a reasonable degree of punctuality and safety as the companies learned to make full use of all their resources. Many people organised their visits through subscription associations at a time when there was still considerable hostility to the concept of the Exhibition. Many were encouraged and assisted by their employers who used the visits as an exercise in good industrial relations. Most, however, merely took advantage of the low excursion fares resulting from intense competition between the railway companies. Although many went seeking self-improvement, the majority were attracted by the press publicity to visit the greatest spectacle they were ever likely to encounter.