Integral Field Spectroscopy of HH 262: The Spectral Atlas

HH 262 is a group of emitting knots displaying an "hour-glass" morphology in the Halpha and [SII] lines, located 3.5' to the northeast of the young stellar object L1551-IRS5, in Taurus. We present new results of the kinematics and physical conditions of HH 262 based on Integral Field Spectroscopy covering a field of 1.5'x3', which includes all the bright knots in HH 262. These data show complex kinematics and significant variations in physical conditions over the mapped region of HH 262 on a spatial scale of <3". A new result derived from the IFS data is the weakness of the [NII] emission (below detection limit in most of the mapped region of HH 262), including the brightest central knots. Our data reinforce the association of HH 262 with the redshifted lobe of the evolved molecular outflow L1551-IRS5. The interaction of this outflow with a younger one, powered by L1551 NE, around the position of HH 262 could give rise to the complex morphology and kinematics of HH 262.Comment: Accepted for publication in MNRA

DNA Renaturation at the Water-Phenol Interface

We study DNA adsorption and renaturation in a water-phenol two-phase system, with or without shaking. In very dilute solutions, single-stranded DNA is adsorbed at the interface in a salt-dependent manner. At high salt concentrations the adsorption is irreversible. The adsorption of the single-stranded DNA is specific to phenol and relies on stacking and hydrogen bonding. We establish the interfacial nature of a DNA renaturation at a high salt concentration. In the absence of shaking, this reaction involves an efficient surface diffusion of the single-stranded DNA chains. In the presence of a vigorous shaking, the bimolecular rate of the reaction exceeds the Smoluchowski limit for a three-dimensional diffusion-controlled reaction. DNA renaturation in these conditions is known as the Phenol Emulsion Reassociation Technique or PERT. Our results establish the interfacial nature of PERT. A comparison of this interfacial reaction with other approaches shows that PERT is the most efficient technique and reveals similarities between PERT and the renaturation performed by single-stranded nucleic acid binding proteins. Our results lead to a better understanding of the partitioning of nucleic acids in two-phase systems, and should help design improved extraction procedures for damaged nucleic acids. We present arguments in favor of a role of phenol and water-phenol interface in prebiotic chemistry. The most efficient renaturation reactions (in the presence of condensing agents or with PERT) occur in heterogeneous systems. This reveals the limitations of homogeneous approaches to the biochemistry of nucleic acids. We propose a heterogeneous approach to overcome the limitations of the homogeneous viewpoint

Decay Properties of 266^{266}Bh and 262^{262}Db Produced in the 248^{248}Cm + 23^{23}Na Reaction

Decay properties of an isotope $^{266}$Bh and its daughter nucleus $^{262}$Db produced by the $^{248}$Cm($^{23}$Na, 5\textit{n}) reaction were studied by using a gas-filled recoil separator coupled with a position-sensitive semiconductor detector. $^{266}$Bh was clearly identified from the correlation of the known nuclide, $^{262}$Db. The obtained decay properties of $^{266}$Bh and $^{262}$Db are consistent with those observed in the $^{278}$113 chain, which provided further confirmation of the discovery of $^{278}$113.Comment: Accepted for publication in J. Phys. Soc. JPN., to be published in Vol.78 No.

Search for clusters at high redshift - I. Candidate Lya emitters near 1138-262 at z=2.2

Radio, optical and X-ray observations of the powerful radio galaxy PKS 1138-262 at z=2.156 have suggested that this galaxy is a massive galaxy in the center of a forming cluster. We have imaged 1138-262 and the surrounding 38 square arcminute field with the Very Large Telescope in a broad band and a narrow band encompassing the redshifted Lya emission. We detect 50 objects with rest equivalent width larger than 20 A and a luminous, highly extended Lya halo around 1138-262. If the radio galaxy is at the center of a forming cluster, these objects are candidate Lya emitting cluster galaxies.Comment: Accepted for publication in A&A as Letter, 4 pages, 4 figure

Deep high-resolution X-ray spectra from cool-core clusters

We examine deep XMM-Newton Reflection Grating Spectrometer (RGS) spectra from the cores of three X-ray bright cool core galaxy clusters, Abell 262, Abell 3581 and HCG 62. Each of the RGS spectra show Fe XVII emission lines indicating the presence of gas around 0.5 keV. There is no evidence for O VII emission which would imply gas at still cooler temperatures. The range in detected gas temperature in these objects is a factor of 3.7, 5.6 and 2 for Abell 262, Abell 3581 and HCG 62, respectively. The coolest detected gas only has a volume filling fraction of 6 and 3 per cent for Abell 262 and Abell 3581, but is likely to be volume filling in HCG 62. Chandra spatially resolved spectroscopy confirms the low volume filling fractions of the cool gas in Abell 262 and Abell 3581, indicating this cool gas exists as cold blobs. Any volume heating mechanism aiming to prevent cooling would overheat the surroundings of the cool gas by a factor of 4. If the gas is radiatively cooling below 0.5 keV, it is cooling at a rate at least an order of magnitude below that at higher temperatures in Abell 262 and Abell 3581 and two-orders of magnitude lower in HCG 62. The gas may be cooling non-radiatively through mixing in these cool blobs, where the energy released by cooling is emitted in the infrared. We find very good agreement between smooth particle inference modelling of the cluster and conventional spectral fitting. Comparing the temperature distribution from this analysis with that expected in a cooling flow, there appears to be a even larger break below 0.5 keV as compared with previous empirical descriptions of the deviations of cooling flow models.Comment: 19 pages, 22 figures, accepted by MNRA

"Annihilation through labor": the killing of state prisoners in the Third Reich

One of the most distinctive features of Nazi society was the increasingly radical division of its members into “national comrades” and “community aliens.” The former were to be protected by the state and encouraged to procreate, while the latter were seen as political, social, racial, or eugenic threats and were to be ruthlessly eliminated from society. With the start of the Second World War, various nonlethal forms of discrimination against these “community aliens” were gradually replaced by policies geared to physical annihilation, culminating above all in the extermination of the European Jews. In view of a crime of this previously unimaginable magnitude, it is hardly surprising that when historians started in earnest to examine the genocidal policies of the Nazi dictatorship in the 1960s they focused on the development and administration of the “Final Solution of the Jewish Question,” as the Nazis called it. But in the last two decades, the fate of other “community aliens” in the Third Reich, such as the Roma and Sinti (“Gypsies”), slave laborers, and the disabled, has been investigated too. Some historians have also begun to examine those who deviated in various other ways from the norms of society, people who were often classified in the Third Reich, and indeed before, as “asocials.” There was never an agreed definition as to who these people were, and the term was used to stigmatize a vast variety of nonnormative behavior. According to a 1938 directive by the head of the German security police, Reinhard Heydrich, any person could be classified as “asocial” who “demonstrates through conduct opposed to the community . . . that he does not want to adapt to the community.” During the Third Reich, such vague statements served as the basis for the persecution of juvenile delinquents, criminal offenders, vagrants, prostitutes, and homosexuals, among many others. Certain groups were simultaneously classified as racial and social outsiders and thus suffered “dual racism.” This was true in particular for the Sinti and Roma, who had been persecuted for their way of life long before the Nazi “seizure of power” in 1933. Historical research into the fate of the “asocials” has produced some valuable insights into the treatment of members of these marginal groups in the Third Reich, many of whom died in SS concentration or extermination camps. Yet despite this growing interest, the most comprehensive of all the extermination programs directed against “asocials” in the Third Reich has never been investigated. From late 1942 onward, over twenty thousand offenders classified as “asocial” were taken out of the state penal system and transferred to the police for “annihilation through labor.” At least two-thirds of them perished in concentration camps. But in the historical literature this program has either been dealt with in passing or completely ignored. Why have historians neglected the murder of state prisoners? There appears to be a reluctance to focus on offenders against the law in the Third Reich, unless their offences can be seen in some way as forms of political or social protest. In contrast to the racially or politically persecuted, not all common criminals can be described merely as innocent victims, and the often brutal behavior of criminal Kapos in concentration camps probably further alienated historians from dealing with the criminals. Another factor that explains the poor state of research is the inaccessibility of source material. Leading officials in the Ministry of Justice made sure that most files relating to the “annihilation through labor” of state prisoners were pulped before the end of the war.8 Yet individual documents have survived, scattered around various archives in Germany. They can be complemented by information gained from individual prisoner files, as well as from unpublished documents and testimonies collected in numerous postwar legal investigations. None of these criminal investigations ever led to the conviction of the prison officials involved—another reason for the lack of historical interest. Finally, German legal history after the war spread the myth that the legal administration had rejected or even resisted the Nazi regime. State penal institutions, if dealt with at all, were described as safe havens that had “nothing to do with the concentration camps.” Thus, until today, historians have largely ignored the state prison system and its inmates. This article will first describe the origins of the decision in 1942 for the extermination of certain state prisoners. Then the actual process of transfer will be investigated in detail, examining issues such as the background of the transferred inmates and the participation of prison officials. The article will also deal with the fate of the state prisoners after their transport to the Nazi concentration camps and the radicalization of policy against the prisoners remaining in the state penal institutions. Exploring these issues contributes to our knowledge of the treatment of deviants in the Third Reich. But this article will also address some wider issues concerning the nature of the Nazi dictatorship, such as the origins of extermination policies in the Third Reich. In recent years, a number of historians have argued that it was time to move beyond the “sterile debates” between so-called intentionalist historians, who focused on the murderous will and ideology of the Nazi leaders, above all Hitler, and so-called structuralist historians, who pointed to the dynamic and uncoordinated interactions between different agencies of the Nazi dictatorship that led to a “cumulative radicalization” (Hans Mommsen). Various historians have now put forward a synthesis of both positions, while ground-breaking empirical research into the “final solution” has posed new questions and provided new answers. Still, many of the more recent studies of Nazi genocide continue to explore central issues first raised in the debates between intentionalists and structuralists such as Hitler’s role in extermination policy, the interaction between regional officials and the decision makers in Berlin, and the role of racial ideology versus more material motives in Nazi mass murder. This study of the “annihilation through labor” of state prisoners addresses some of these general issues. It will also shed new light on the relation between the judiciary and the police in the Third Reich. The postwar portrait of a passive or even anti-Nazi judiciary has not gone unchallenged. Still, many historians continue to describe the judicial authorities and the police as having been in a constant state of conflict. They describe the Third Reich as a “dual state,” split between the “prerogative state” and the “normative state.” The latter was the traditional state apparatus, ensuring that normal life was ruled by legal norms. However, in matters that were thought to touch on the interest of the state, the “prerogative state” could override these legal norms, above all through the agency of the police, locking up all political, racial, and social suspects in SS concentration camps without trial. Thus, state attorneys and the police are seen as competing institutions of prosecution, while state penal institutions and concentration camps are described as competing institutions of confinement. A detailed investigation of the transfer of state prisoners can help to establish how far this picture of the “dual state” stands up to critical scrutiny

"Consciousness". Selected Bibliography 1970 - 2001

This is a bibliography of books and articles on consciousness in philosophy, cognitive science, and neuroscience over the last 30 years. There are three main sections, devoted to monographs, edited collections of papers, and articles. The first two of these sections are each divided into three subsections containing books in each of the main areas of research. The third section is divided into 12 subsections, with 10 subject headings for philosophical articles along with two additional subsections for articles in cognitive science and neuroscience. Of course the division is somewhat arbitrary, but I hope that it makes the bibliography easier to use. This bibliography has first been compiled by Thomas Metzinger and David Chalmers to appear in print in two philosophical anthologies on conscious experience (Metzinger 1995a, b). From 1995 onwards it has been continuously updated by Thomas Metzinger, and now is freely available as a PDF-, RTF-, or HTML-file. This bibliography mainly attempts to cover the Anglo-Saxon and German debates, in a non-annotated, fully formatted way that makes it easy to "cut and paste" from the original file. To a certain degree this bibliography also contains items in other languages than English and German - all submissions in other languages are welcome. Last update of current version: July 13th, 2001

The hybrid of floating stone column by numerical and physical evaluation

Rapid population growth amplifying demand for accommodation and infrastructure has resulted in soft ground being increasingly used in construction. Problems related to soft ground can be remedied by adopting a ground improvement technique. The stone column is one of the most effective and feasible techniques for soft clay soil improvement. Stone columns increase bearing capacity and reduce the settlement of soil. However, soft ground of more than 40 meters depth makes stone column treatment costlier. The design of floating stone columns within soft ground is sometimes needs to adopt. However, this method is not popular compared to the end bearing stone columns due to low mobilised shear resistance and resulted in higher occurrence of punching failure. This research is aimed for addressing the shortcoming floating stone columns with proposing the hybrid dimension floating stone columns. The hybrid stone column size able to increase the mobilised shear resistance, decrease punching failure, and reduce the volume of aggregates. In the present work, finite element analysis was performed using the program PLAXIS 2D. An elastic-perfectly plastic constitutive soil model relation based on the Mohr-Coulomb criterion was utilized to predict the behaviour of soft clay strengthen by stone column. Response Surface Methodology (RSM) was used to optimize the hybrid stone column size with the Design-Expert 6.0.4 software. The laboratory physical model tests were performed based on the sizes of optimum hybrid stone column size proposed by RSM. The results revealed that the optimal parameter of the uniform diameter of 44 mm with a length of 100 mm increases its load bearing capacity of 3260.7 N and the lowest settlement was recorded at a diameter of 24.2 mm with a length of 400 mm to achieve 25.8 mm of settlement. Moreover, the hybrid column size i.e. the first stone column diameter of 43 mm and second diameter of 21.2 mm with the same lengths of 200 mm each diameter able to achieve load-bearing capacity of 3350.9 N and settlement of 24.5 mm. Thus, by comparing with the uniform diameter stone column of 44 mm and length of 400 mm, the hybrid column able to increase the load bearing capacity by 3% and decrease the settlement by 5%. In addition, a good agreement was obtained between the numerical and physical models with variation 25%. In addition, the hybrid stone column size is able to reduce the volume of aggregates up to 40%

Esther Bick's legacy of infant observation at the Tavistock — Some reflections 60 years on.

This paper reviews the development of Infant Observation from its inception in 1948. It revisits Bick's original 1964 paper and explores current divergences from her original practice in the context of contemporary theories of psychoanalysis and adjacent disciplines and of relevant changes in society. It draws on the personal recollections of Bick's early students as well as the expanding published literature. It discusses seminar technique, the training of seminar leaders, and clinical and research applications of the observational method