279 research outputs found
Recent Legal Literature
, vols 90, 91, and 92; Veeder (ed.): Legal Masterpieces--speciments of Argumentation and Exposition by Eminent Lawyers; Eastman: The Bankruptcy Law Annotated, Being the National Bankruptcy Act of 1898, as amended; Wambaugh (ed.): Littleton\u27s Tenures in Englis
Note and Comment
The Law School; Unauthorized Operation by Physician; The Kansas Oil Refinery Bill; Garnishment of Public Corporations; The rule in Wild\u27s Case Today; Effect of a complicated Form of Ballot on the Elector\u27s Freedom of Choice; Situs of Debts for Garnishment; Malicious Interference With the Contract of Employmen
Note and Comment
The Proposed Code of Legal Ethics for the American Bar Association; The Power of a court of Equity to Order the Exhumation of a Dead Body for Examination in Aid of the Defense of a Civil Action at Law; The Consolidation of Municipal Corporations and the Federal Constitution; The Scalper in Law and in Equity; The Basis of Equitable Jurisdiction in Cases of Fraud
A Multiscale Progressive Failure Modeling Methodology for Composites that Includes Fiber Strength Stochastics
A multiscale modeling methodology was developed for continuous fiber composites that incorporates a statistical distribution of fiber strengths into coupled multiscale micromechanics/finite element (FE) analyses. A modified two-parameter Weibull cumulative distribution function, which accounts for the effect of fiber length on the probability of failure, was used to characterize the statistical distribution of fiber strengths. A parametric study using the NASA Micromechanics Analysis Code with the Generalized Method of Cells (MAC/GMC) was performed to assess the effect of variable fiber strengths on local composite failure within a repeating unit cell (RUC) and subsequent global failure. The NASA code FEAMAC and the ABAQUS finite element solver were used to analyze the progressive failure of a unidirectional SCS-6/TIMETAL 21S metal matrix composite tensile dogbone specimen at 650 degC. Multiscale progressive failure analyses were performed to quantify the effect of spatially varying fiber strengths on the RUC-averaged and global stress-strain responses and failure. The ultimate composite strengths and distribution of failure locations (predominately within the gage section) reasonably matched the experimentally observed failure behavior. The predicted composite failure behavior suggests that use of macroscale models that exploit global geometric symmetries are inappropriate for cases where the actual distribution of local fiber strengths displays no such symmetries. This issue has not received much attention in the literature. Moreover, the model discretization at a specific length scale can have a profound effect on the computational costs associated with multiscale simulations.models that yield accurate yet tractable results
Note and Comment
Constitutional Privileges in the Philippine Islands; A Laudatory Publication as a Cause of Action; The Cy-Pres Doctrine; Duty of Vendee to See to Investment of Funds; the Power to Declare a forfeiture and Sell Property Used in Violation of a Statute; Dying Declarations; Juvenile Courts and Jury Trials for Neglected, Delinquent, Children
A Framework to Manage the Complex Organisation of Collaborating: Its Application to Autonomous Systems
In this paper we present an analysis of the complexities of large group
collaboration and its application to develop detailed requirements for
collaboration schema for Autonomous Systems (AS). These requirements flow from
our development of a framework for collaboration that provides a basis for
designing, supporting and managing complex collaborative systems that can be
applied and tested in various real world settings. We present the concepts of
"collaborative flow" and "working as one" as descriptive expressions of what
good collaborative teamwork can be in such scenarios. The paper considers the
application of the framework within different scenarios and discuses the
utility of the framework in modelling and supporting collaboration in complex
organisational structures
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Glycosides of nadifloxacin—synthesis and antibacterial activities against methicillin-resistant Staphylococcus aureus
The increase in the number of bacteria that are resistant to multiple antibiotics poses a serious clinical problem that threatens the health of humans worldwide. Nadifloxacin (1) is a highly potent antibacterial agent with broad-spectrum activity. However, its poor aqueous solubility has limited its use to topical applications. To increase its solubility, it was glycosylated herein to form a range of trans-linked (3a-e) and cis-linked (7a,b) glycosides, each of which was prepared and purified to afford single anomers. The seven glycoside derivatives (3a-e, 7a,b) were examined for potency against eight strains of S. aureus, four of which were methicillin-resistant. Although less potent than free nadifloxacin (1), the α-L-arabinofuransoside (3a) was effective against all strains that were tested (minimum inhibitory concentrations of 1–8 μg/mL compared to 0.1–0.25 μg/mL for nadifloxacin), demonstrating the potential of this glycoside as an antibacterial agent. Estimation of Log P as well as observations made during preparation of these compounds reveal that the solubilities of the glycosides were greatly improved compared with nadifloxacin (1), raising the prospect of its use in oral applications
Maritime Navigation: Characterizing Collaboration in a High-Speed Craft Navigation Activity
acceptedVersio
Ultrafast evanescent heat transfer across solid interfaces via hyperbolic phonon polaritons in hexagonal boron nitride
The efficiency of phonon-mediated heat transport is limited by the intrinsic
atomistic properties of materials, seemingly providing an upper limit to heat
transfer in materials and across their interfaces. The typical speeds of
conductive transport, which are inherently limited by the chemical bonds and
atomic masses, dictate how quickly heat will move in solids. Given that
phonon-polaritons, or coupled phonon-photon modes, can propagate at speeds
approaching 1 percent of the speed of light - orders of magnitude faster than
transport within a pure diffusive phonon conductor - we demonstrate that
volume-confined, hyperbolic phonon-polariton(HPhP) modes supported by many
biaxial polar crystals can couple energy across solid-solid interfaces at an
order of magnitude higher rates than phonon-phonon conduction alone. Using
pump-probe thermoreflectance with a mid-infrared, tunable, probe pulse with
sub-picosecond resolution, we demonstrate remote and spectrally selective
excitation of the HPhP modes in hexagonal boron nitride in response to
radiative heating from a thermally emitting gold source. Our work demonstrates
a new avenue for interfacial heat transfer based on broadband radiative
coupling from a hot spot in a gold film to hBN HPhPs, independent of the broad
spectral mismatch between the pump(visible) and probe(mid-IR) pulses employed.
This methodology can be used to bypass the intrinsically limiting phonon-phonon
conductive pathway, thus providing an alternative means of heat transfer across
interfaces. Further, our time-resolved measurements of the temperature changes
of the HPhP modes in hBN show that through polaritonic coupling, a material can
transfer heat across and away from an interface at rates orders of magnitude
faster than diffusive phonon speeds intrinsic to the material, thus
demonstrating a pronounced thermal transport enhancement in hBN via
phonon-polariton coupling
Phytoplankton-Bacterial Interactions Mediate Micronutrient Colimitation at the Coastal Antarctic Sea Ice Edge
Southern Ocean primary productivity plays a key role in global ocean biogeochemistry and climate. At the Southern Ocean sea ice edge in coastal McMurdo Sound, we observed simultaneous cobalamin and iron limitation of surface water phytoplankton communities in late Austral summer. Cobalamin is produced only by bacteria and archaea, suggesting phytoplankton–bacterial interactions must play a role in this limitation. To characterize these interactions and investigate the molecular basis of multiple nutrient limitation, we examined transitions in global gene expression over short time scales, induced by shifts in micronutrient availability. Diatoms, the dominant primary producers, exhibited transcriptional patterns indicative of co-occurring iron and cobalamin deprivation. The major contributor to cobalamin biosynthesis gene expression was a gammaproteobacterial population, Oceanospirillaceae ASP10-02a. This group also contributed significantly to metagenomic cobalamin biosynthesis gene abundance throughout Southern Ocean surface waters. Oceanospirillaceae ASP10-02a displayed elevated expression of organic matter acquisition and cell surface attachment-related genes, consistent with a mutualistic relationship in which they are dependent on phytoplankton growth to fuel cobalamin production. Separate bacterial groups, including Methylophaga, appeared to rely on phytoplankton for carbon and energy sources, but displayed gene expression patterns consistent with iron and cobalamin deprivation. This suggests they also compete with phytoplankton and are important cobalamin consumers. Expression patterns of siderophore- related genes offer evidence for bacterial influences on iron availability as well. The nature and degree of this episodic colimitation appear to be mediated by a series of phytoplankton–bacterial interactions in both positive and negative feedback loops
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