76,944 research outputs found

    The worldwide status of phasmids (Insecta: Phasmida) as pests of agriculture and forestry, with a generalised theory of phasmid outbreaks

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    © 2015 Baker. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http:// creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/ zero/1.0/) applies to the data made available in this article, unless otherwise stated. The file attached is the published version of the article

    Is Military Justice Sentencing on the March? Should it be? And if so, Where should it Head? Court-Martial Sentencing Process, Practice, and Issues

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    This article starts with a sketch of the military justice system to orient readers. Understanding that structure, the article then describes the sentencing process for special and general courts-martial. The article follows by identifying two core military sentencing questions: First, should commanders have authority to grant clemency? Second, should the military justice system adopt sentencing guidelines? With respect to each topic presented, the article does not attempt to answer the questions nor offer prescriptions. Rather, it seeks to identify the principal fault lines around which debate should, or will likely, fall. The article next presents ‘‘nutshell’’ introductions to additional sentencing matters that may warrant review as applied in the military context, including the handling of collateral matters, and the relationship between age and culpability. However, for the reasons stated, these issues are not presented in detail here

    The National Security Process and a Lawyer’s Duty: Remarks to the Senior Judge Advocate Symposium

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    September 11 changed so much about our lives and how we perceive national security. Harold Lasswell, in an earlier context, described the sharing of danger throughout society as the “socialization of danger,” which he wrote was a permanent characteristic of modern violence; but not for America until September 11. The socialization of danger has made ordinary citizens participants in the national security process in a way not previously experienced. In addition, it has brought relatively unknown federal agencies, like the Federal Emergency Management Agency and the Centers for Disease Control, to the forefront of national security planning and response. And both of these occurrences have emphasized the importance of viewing terrorism and cyber security as problems requiring effective vertical and not just horizontal process. Where most national security problems require coordination amongst federal agencies, homeland security is equally about coordination between federal, state, and local actors down to the level of first responder and the technician who spots the first medical anomaly. This vertical process will test the manner in which information is shared, resources allocated, and perhaps the level at which decisions of life and death, heretofore made by the President, are taken. Constitutional democracy also means that all decisions are made according to law. And that means that sound Executive process must incorporate timely and competent legal advice. In some cases, legal review is dictated by statute, as in the case of the Foreign Intelligence Surveillance Act (FISA), which requires the attorney general, or his designee, to approve requests for electronic surveillance or physical search before they are submitted to the FISA court. In other cases, the President has directed a specific process to ensure legal review in areas historically prone to peril, including certain intelligence activities. However, the majority of legal advice within the national security process is not directed, but is the product of practice, custom, and personal interchange between lawyer and client. That means that good process requires personal persuasion, presence, and value added, or the lawyer will find he or she is only contributing to decisions where legal review is mandated and then only as the last stop on the bus route. Constitutional democracy does not rest on such process

    Steroid Receptors and Vertebrate Evolution

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    Considering that life on earth evolved about 3.7 billion years ago, vertebrates are young, appearing in the fossil record during the Cambrian explosion about 542 to 515 million years ago. Results from sequence analyses of genomes from bacteria, yeast, plants, invertebrates and vertebrates indicate that receptors for adrenal steroids (aldosterone, cortisol), and sex steroids (estrogen, progesterone, testosterone) also are young, with receptors for estrogens and 3-ketosteroids first appearing in basal chordates (cephalochordates: amphioxus), which are close ancestors of vertebrates. An ancestral progesterone receptor and an ancestral corticoid receptor, the common ancestor of the glucocorticoid and mineralocorticoid receptors, evolved in jawless vertebrates (cyclostomes: lampreys, hagfish). This was followed by evolution of an androgen receptor and distinct glucocorticoid and mineralocorticoid receptors in cartilaginous fishes (gnathostomes: sharks). Adrenal and sex steroid receptors are not found in echinoderms: and hemichordates, which are ancestors in the lineage of cephalochordates and vertebrates. The presence of steroid receptors in vertebrates, in which these steroid receptors act as master switches to regulate differentiation, development, reproduction, immune responses, electrolyte homeostasis and stress responses, argues for an important role for steroid receptors in the evolutionary success of vertebrates, considering that the human genome contains about 22,000 genes, which is not much larger than genomes of invertebrates, such as Caenorhabditis elegans (~18,000 genes) and Drosophila (~14,000 genes).Comment: 18 pages, 5 figure

    Insights from the Structure of Estrogen Receptor into the Evolution of Estrogens: Implications for Endocrine Disruption

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    In the last decade, there has been important progress in understanding the origins and evolution of receptors for adrenal steroids (aldosterone, cortisol) and sex steroids (estradiol, progesterone, testosterone) due to the sequencing of genomes from animals that are at key sites in vertebrate evolution. Although the estrogen receptor [ER] appears to be the ancestral vertebrate steroid receptor and estradiol [E2] is the physiological ligand for vertebrate ERs, the identity of the ancestral ligand(s) for the ER remains unknown. Here, using an analysis of crystal structures of human ER[alpha] with E2 and other chemicals and 3D models of human ER[alpha] with 27-hydroxycholesterol and 5-androsten-3[beta],17[beta]-diol, we propose that one or more [DELTA]5 steroids were the ancestral ligands for the ER, with E2 evolving later as the canonical estrogen. The evidence that chemicals with a [beta]-hydroxy at C3 in a saturated A ring can act as estrogens and the conformational flexibility of the vertebrate ER can explain the diversity of synthetic chemicals that disrupt estrogen responses by binding to vertebrate ERs

    Trichoplax, the simplest known animal, contains an estrogen-related receptor: Implications for the evolution of vertebrate and invertebrate estrogen receptors

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    Although, as their names imply, vertebrate and invertebrate estrogen receptors [ERs] and estrogen-related receptors [ERRs] are related transcription factors, their evolutionary relationships to each other are not fully understood. We searched recently sequenced genome of _Trichoplax_, the simplest known animal, and genomes from three lophotrochozoans: _Capitella_, a worm, _Helobdella robusta_, a leech, and _Lottia gigantea_, a snail, to elucidate the origins and evolution of ERs and ERRs. BLAST found an ERR in _Trichoplax_, but no ER. BLAST searches of the lophotrochozaons found ERRs in all three and invertebrate ERs in _Capitella_ and _Lottia_, but not in _Helobdella_. These database searches and a phylogenetic analyses indicate that invertebrate ERs arose in a protostome, and vertebrate ERs arose later in deuterostome

    The National Security Presidency in Constitutional Context: Reflections on Terrorism and the Presidency from the Last Ten Years

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    In this time of terrorist threat, there is no more important institution to study than the national security presidency. That is because the president is singularly situated to command the instruments to counter terrorism. He is also singularly situated to ensure that such instruments are used effectively, lawfully, and in a manner consistent with constitutional values. I believe I have a duty, based on where I have been, to help others observe and understand the institution of the presidency. I do so because I want the national security presidency to succeed in providing for our physical security and in upholding our constitutional way of life; or, as the president’s constitutional oath states succinctly, “to preserve, protect, and defend the Constitution.” Those who teach, interpret and study the presidency have an important duty to play in this process by testing the institution to ensure that these functions are successfully performed

    Origin and diversification of steroids: Co-evolution of enzymes and nuclear receptors

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    Recent sequencing of amphioxus and sea urchin genomes has provided important data for understanding the origins of enzymes that synthesize adrenal and sex steroids and the receptors that mediate physiological response to these vertebrate steroids. Phylogenetic analyses reveal that CYP11A and CYP19, which are involved in the synthesis of adrenal and sex steroids, first appear in the common ancestor of amphioxus and vertebrates. This correlates with recent evidence for the first appearance in amphioxus of receptors with close similarity to vertebrate steroid receptors. Other CYP450 enzymes involved in steroid synthesis can be traced back to invertebrates, in which they have at least two functions: detoxifying xenobiotics and catalyzing the synthesis of sterols that activate nuclear receptors. CYP450 metabolism of hydrophobic xenobiotics may have been a key event in the origin of ligand-activated steroid receptors from constitutively active nuclear receptors
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