3,886 research outputs found
War, Memory, and National Identity in the Hebrew Bible
Drawing on the intriguing interdisciplinary research on war commemoration, the book shows that war pervades the pages of the Bible because its authors were engaged in an effort to forge a corporate identity for Israel, one that can both transcend deep divisions within the population and withstand military conquest by imperial armies
Military crimes
Concerned with Israel’s history and future, the Bible devotes considerable space to war—the most powerful catalyst of change in the lives of nations. The biblical authors often display a consciousness of illicit activities in wartime, anticipating what we would call today “war crimes” or “military crimes.” And they also produced the first known examples of written laws of war. While the so-called Code of Hammurabi from Mesopotamia contains stipulations for soldiers, it is concerned with methods of conscription, military discipline, and concerns of soldiers’ families—yet not conduct on the battlefield. Ancient cultures from the Aegean and Western Asia, however, do reflect a general sense of what one deemed to be “lawful” conduct for armies. In some places they even moved in the direction of formal law. Setting a precedent for later international law and war conventions, some ancient Greek city-states formed interstate leagues (“amphictyonies”) and took oaths that they would not destroy each other’s cities (and especially their municipal water sources). Similarly, in the fifth book of Plato’s Republic, Socrates argues for the necessity of a law sanctioning Hellenic armies that lay waste to arable land. In the Hebrew Bible, we find an even more deliberate effort to define and depict what actions are permissible and forbidden in wartime
Solving Potential Scattering Equations without Partial Wave Decomposition
Considering two-body integral equations we show how they can be dimensionally
reduced by integrating exactly over the azimuthal angle of the intermediate
momentum. Numerical solution of the resulting equation is feasible without
employing a partial-wave expansion. We illustrate this procedure for the
Bethe-Salpeter equation for pion-nucleon scattering and give explicit details
for the one-nucleon-exchange term in the potential. Finally, we show how this
method can be applied to pion photoproduction from the nucleon with
rescattering being treated so as to maintain unitarity to first order in the
electromagnetic coupling. The procedure for removing the azimuthal angle
dependence becomes increasingly complex as the spin of the particles involved
increases.Comment: 15 pages, 4 figure
Low-Latency Teleoperations: Operational Implications for Human Space Exploration
Low-latency teleoperations (LLT) is envisioned to be an element of human exploration missions in a number of different applications. LLT can be broadly considered to encompass any remote operation of an asset with a communication delay that is less than the human response time to allow for what is effectively "real-time" or "near real-time" operations. This paper will explore motivations and operational implications for why and how LLT might be used for human exploration space missions. LLT analyses have been performed under the auspices of the NASA Human Spaceflight Architecture Team (HAT) and Evolvable Mars Campaign (EMC). The EMC created a flexible, evolvable, capability-driven architectural strategy to enable a sustainable long-term human presence at Mars. LLT is envisioned to be part of that strategy for both in-space and on-surface applications, and this paper will expand on operational considerations within that broader strategic context, as well additional contexts. Some operational implications explored in this paper, derived largely from previous work, are: (1) crew mission support, for which we will address roles for Mission Control on earth, balanced with the capability for crew and robotic assets to operate independently, (2) science operations, with a focus on "backroom" support, highly dynamic science, and enhanced science return and efficiency, and (3) operational efficiency at a deep-space destination such as Mars, including implications for communications infrastructures and how to leverage and balance system autonomy with crew operations, both of which can inform the overall operational "choreography" between crew members, multiple shifts, and exploration assets
Plasmonic nanogap enhanced phase change devices with dual electrical-optical functionality
Modern-day computers use electrical signaling for processing and storing data
which is bandwidth limited and power-hungry. These limitations are bypassed in
the field of communications, where optical signaling is the norm. To exploit
optical signaling in computing, however, new on-chip devices that work
seamlessly in both electrical and optical domains are needed. Phase change
devices can in principle provide such functionality, but doing so in a single
device has proved elusive due to conflicting requirements of size-limited
electrical switching and diffraction-limited photonic devices. Here, we combine
plasmonics, photonics and electronics to deliver a novel integrated
phase-change memory and computing cell that can be electrically or optically
switched between binary or multilevel states, and read-out in either mode, thus
merging computing and communications technologies
Lymphocyte Subpopulation Number and Function in Infancy
Normal values for percentages of lymphocyte subpopulations and functional responses
to mitogen stimulation in infancy are not well established. In the present study,
lymphocyte subpopulations were examined in umbilical cord blood samples and in
peripheral blood samples drawn before 7 and 24 months of age (mean age 10.4 months)
from a healthy population of infants born in Tucson, Arizona. Results indicate
significant increases occurred from birth to later infancy in the percentages of total T
cells (CD3), T-cell subsets (CD4, CD8) and B cells (CD20). The CD4/CD8 ratio and the
functional responses to ConA and PWM mitogens significantly decreased from birth to
later infancy. PHA responsiveness did not show a significant change. Results from
cross-sectional analyses (n=271) were supported in a smaller longitudinal subset (n=37).
There were no detectable ethnic- or gender-related differences in cord blood or samples
obtained in later infancy. The normal values established in this study will be useful in
studies of immune-system maturation and in the clinical evaluation of newborns,
infants, and toddlers suspected of either acquired or congenital immune-deficiency
states
Transitioning cell culture CURE labs from campus to online: Novel strategies for a novel time
Course-based undergraduate research experiences (CUREs) provide a way for students to gain research experience in a classroom setting. Few examples of cell culture CUREs or online CUREs exist in the literature. The Cell Biology Education Consortium (CBEC) provides a network and resources for instructors working to incorporate cell-culture based research into the classroom. In this article, we provide examples from six instructors from the CBEC network on how they structure their cell-culture CUREs and how they transitioned the labs to online in the spring semester of 2020. We intend for these examples to provide instructors with ideas for strategies to set up cell culture CUREs, how to change that design mid-term, and for creating online CUREs in the future
The effect of dietary interventions or patterns on the cardiometabolic health of individuals treated with androgen deprivation therapy for prostate cancer: A systematic review
Prostate cancer survivors treated with androgen deprivation therapy may be at increased risk of cardiovascular disease. Dietary recommendations for the prevention and/or management of cardiovascular disease for these individuals are lacking. This review synthesizes the evidence on the effect of dietary interventions on cardiometabolic biomarkers and cardiovascular disease risk in prostate cancer survivors receiving androgen deprivation therapy. A systematic review was conducted across PubMed, CINAHL, Embase, and Cochrane CENTRAL. Intervention or observational cohort studies evaluating diets, nutrients, or nutraceuticals with or without concurrent exercise interventions on cardiovascular disease, cardiovascular events, or cardiovascular disease biomarkers in those treated with androgen deprivation therapy were included. Confidence in the body of evidence was appraised using Grading of Recommendations, Assessment, Development and Evaluations. Twelve studies reported across fifteen papers were included. Interventions were heterogenous, with most studies including an exercise co-intervention (n = 8). Few significant findings for the effects of diet on cardiometabolic markers were likely due to weak methodology and sample sizes. Strongest evidence was for the effect of a healthy Western dietary pattern with exercise on improved blood pressure (Confidence: moderate). The healthy Western dietary pattern with exercise may improve high-density lipoprotein cholesterol (Confidence: Low) and flow-mediated dilation. Soy may improve total cholesterol (Confidence: Very low). A low-carbohydrate diet with physical activity may improve high-density lipoprotein cholesterol, incidence of metabolic syndrome, and Framingham cardiovascular disease risk score. Evidence of the effect of dietary interventions on cardiometabolic biomarkers and cardiovascular disease risk of prostate cancer survivors receiving androgen deprivation therapy is insufficient to inform practice. Well-designed dietary interventions aimed at improving cardiometabolic outcomes of this population are warranted to inform future dietary recommendations
The Mass of HD 38529 c from Hubble Space Telescope Astrometry and High-Precision Radial Velocities
(Abridged) Hubble Space Telescope (HST) Fine Guidance Sensor astrometric
observations of the G4 IV star HD 38529 are combined with the results of the
analysis of extensive ground-based radial velocity data to determine the mass
of the outermost of two previously known companions. Our new radial velocities
obtained with the Hobby-Eberly Telescope and velocities from the
Carnegie-California group now span over eleven years. With these data we obtain
improved RV orbital elements for both the inner companion, HD 38529 b and the
outer companion, HD 38529 c. We identify a rotational period of HD 38529
(P_{rot}=31.65 +/- 0.17 d) with FGS photometry. We model the combined
astrometric and RV measurements to obtain the parallax, proper motion,
perturbation period, perturbation inclination, and perturbation size due to HD
38529 c. For HD 38529 c we find P = 2136.1 +/- 0.3 d, perturbation semi-major
axis \alpha =1.05 +/-0.06i_{Jup}) companion at
P~194 days. Additional observations (radial velocities and/or Gaia astrometry)
are required to validate an interpretation of HD 38529 d as a planetary-mass
companion. If confirmed, the resulting HD 38529 planetary system may be an
example of a "Packed Planetary System".Comment: Accepted by The Astronomical Journa
Dynamics on expanding spaces: modeling the emergence of novelties
Novelties are part of our daily lives. We constantly adopt new technologies,
conceive new ideas, meet new people, experiment with new situations.
Occasionally, we as individuals, in a complicated cognitive and sometimes
fortuitous process, come up with something that is not only new to us, but to
our entire society so that what is a personal novelty can turn into an
innovation at a global level. Innovations occur throughout social, biological
and technological systems and, though we perceive them as a very natural
ingredient of our human experience, little is known about the processes
determining their emergence. Still the statistical occurrence of innovations
shows striking regularities that represent a starting point to get a deeper
insight in the whole phenomenology. This paper represents a small step in that
direction, focusing on reviewing the scientific attempts to effectively model
the emergence of the new and its regularities, with an emphasis on more recent
contributions: from the plain Simon's model tracing back to the 1950s, to the
newest model of Polya's urn with triggering of one novelty by another. What
seems to be key in the successful modelling schemes proposed so far is the idea
of looking at evolution as a path in a complex space, physical, conceptual,
biological, technological, whose structure and topology get continuously
reshaped and expanded by the occurrence of the new. Mathematically it is very
interesting to look at the consequences of the interplay between the "actual"
and the "possible" and this is the aim of this short review.Comment: 25 pages, 10 figure
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