1,796 research outputs found
Crime in the Library! The Special Collections of Lloyd Sealy Library, John Jay College of Criminal Justice/CUNY: A Repository Profile.
Started as a small collection of books to support the New York Police Department (NYPD), Police Academy, the library of John Jay College of Criminal Justice has a rich history and built important collections in just over four decades
Halaf bead, pendant and seal \u27workshops\u27 at Domuztepe: technological and reductive strategies.
Almost a thousand beads, pendants and seals have been excavated from the site of Domuztepe over the past decade. This paper is based on an examination of the general typology and technology of this assemblage. Manufacturing systems based upon social networks of decentralised organisation of small production ‘workshops’ are explored. It is suggested that these networks shared a system of sequenced actions according to raw material and finished products. A group of unfinished beads in the preliminary phase of production suggests evidence of batched reduction and finishing strategies that balanced breakage risk with a high level of proficiency. At Domuztepe the reduction sequences proposed here would have required tools for pecking, cutting, snapping, perforating, grinding and polishing of stones to create beads, pendants and seals of great quantity and variety. This paper is intended to open a dialogue between small finds and lithic specialists about the technological processes and tools used to create stone ornaments in the Neolithic Near East
Fifth Millennium Anthropomorphic Figurines in Southeastern and Central Anatolia: Comparative Museum Research.
The Halaf cultural horizon occurred during the fifth millennium B.C. (uncalibrated) and extended throughout upper Mesopotamia, including southeastern Anatolia. Halaf material culture is well-known for its imaginative and beautifully made architecture, polychrome-painted pottery, geometric stamp seals and figurines. The regional character and variation of Halaf figurine assemblages however, is poorly understood, particularly in southeastern Anatolia. My research and study of these figurines reveals distinct southeastern Anatolian styles and technologies, some of which demonstrate direct connections to central Anatolia.
This article presents preliminary conclusions from a comparative analysis of contemporaneous anthropomorphic figurines belonging to the Halaf and Chalcolithic cultures conducted at museums and ongoing excavations in central and southeastern Turkey
The Creation and Propagation of Radiation: Fields Inside and Outside of Sources
We present a new algorithm for computing the electromagnetic fields of
currents inside and outside of finite current sources, for arbitrary time
variations in the currents. Unexpectedly, we find that our solutions for these
fields are free of the concepts of differential calculus, in that our solutions
only involve the currents and their time integrals, and do not involve the time
derivatives of the currents. As examples, we give the solutions for two
configurations of current: a planar solenoid and a rotating spherical shell
carrying a uniform charge density. For slow time variations in the currents, we
show that our general solutions reduce to the standard expressions for the
fields in classic magnetic dipole radiation. In the limit of extremely fast
turn-on of the currents, we show that for our general solutions the amount of
energy radiated is exactly equal to the magnetic energy stored in the static
fields a long time after current creation. We give three associated problem
statements which can be used in courses at the undergraduate level, and one
problem statement suitable for courses at the graduate level. These problems
are of physical interest because: (1) they show that current systems of finite
extent can radiate even during time intervals when the currents are constant;
(2) they explicitly display transit time delays across a source associated with
its finite dimensions; and (3) they allow students to see directly the origin
of the reaction forces for time-varying systemsComment: 25 pages, 5 figure
Professional Development Needs From the Identified Concerns of School Leaders As the Change Facilitator for Inclusive Schools
The problem of this study was to identify the professional development needs of the school leader to facilitate the inclusion of students with handicaps into the regular education program. This was a descriptive study which utilized questionnaire methodology. The Change Facilitators Stages of Concern Questionnaire (CFSoCQ) was the instrument selected as appropriate for the study. Permission was obtained from Dr. Gene Hall at the University of Northern Colorado to reproduce and administer the CFSoCQ. The population of this study was school leaders working in Tennessee public schools. A demographic data sheet and the CFSoCQ were mailed to 500 selected school leaders. A 63% return was obtained. The data sheet asked for the school leaders\u27 current assignment, years as a school leader, enrollment of school, view of themselves as innovators, contact with persons with handicaps, training to deal with persons with handicaps, and experience with persons with handicaps. Analysis of the data collected to answer the four research questions and 14 hypotheses revealed the following: Studies over the past five years have shown the thrust not just to bring students with handicaps into the regular school building, but to include these students in regular education classes. Tennessee school leaders do not appear to be professionally developed to face the challenge of facilitating inclusion. Ninety-two percent of the school leaders indicated their most intense concerns were at the Awareness, Information, and Personal Stages of Concern. The data appeared to indicate that Tennessee school leaders were likely to have high Self Concerns regarding inclusion. Professional development was recommended using the findings obtained from the study for Self Concerns. Change facilitation relating to inclusion at the point of Self Concerns had to do with feelings of potential inadequacy, self-doubts about the knowledge required, or uncertainty about the new situation. The implication for successful facilitation for inclusion was to individualize interventions by centering attention on the concerns of those engaged in the inclusion process and accepting those concerns as legitimate reflections of inclusion in progress
INLAND/OCEAN WATERBORNE TRANSPORTATION INNOVATIONS AND PORT CHARGES
Public Economics,
An investigation of the anabolic actions of biosynthetic human growth hormone after injury by burning
Previous clinical trials in normal subjects and post-operative patients have shown that biosynthetic growth hormone preparations increase nitrogen retention. It has been suggested that their administration to injured patients may be beneficial. A clinical trial is presented of twelve adult burned patients of whom six were allocated to receive biosynthetic human growth hormone (somatropin) and six to form a control group. Injury by burning is followed by increases in resting energy expenditure and urinary nitrogen excretion, accompanied by insulin resistance and glucose intolerance. There is a generalised fall in plasma protein concentrations, including the somatomedin, insulin-like growth factor-I. Somatropin administration causes no change in the rate of protein oxidation, the positivity of nitrogen balance or, either serum somatomedin or plasma protein concentrations. It causes an increase in the insulin-resistance already present in burned patients. Two further studies are presented in which somatropin is compared with a placebo in both unburned and burned rats. Injury by burning causes weight-loss, an increase in urinary nitrogen excretion, a fall in the serum albumin and somatomedin concentrations, and a reduction in the strength of healing laparotomy wounds. Somatropin administration to unburned rats causes a small rise in the serum somatomedin concentration and a transient increase in wound-strength. It causes no increase in the positivity of nitrogen balance or weight-gain. Its administration to the burned rat causes no effect on the serum somatomedin concentration, nitrogen balance, weight-gain or wound-healing. These three studies show that somatropin has no anabolic effect soon after injury by burning. I postulate that this failure reflects the changes observed after injury in somatomedin concentrations and the responsiveness of somatomedins to somatropin. I conclude that somatropin and related compounds are not suitable for use as anabolic agents soon after injury by burning
Sunward-propagating Alfv\'enic fluctuations observed in the heliosphere
The mixture/interaction of anti-sunward-propagating Alfv\'enic fluctuations
(AFs) and sunward-propagating Alfv\'enic fluctuations (SAFs) is believed to
result in the decrease of the Alfv\'enicity of solar wind fluctuations with
increasing heliocentric distance. However, SAFs are rarely observed at 1 au and
solar wind AFs are found to be generally outward. Using the measurements from
Voyager 2 and Wind, we perform a statistical survey of SAFs in the heliosphere
inside 6 au. We first report two SAF events observed by Voyager 2. One is in
the anti-sunward magnetic sector with a strong positive correlation between the
fluctuations of magnetic field and solar wind velocity. The other one is in the
sunward magnetic sector with a strong negative magnetic field-velocity
correlation. Statistically, the percentage of SAFs increases gradually with
heliocentric distance, from about 2.7% at 1.0 au to about 8.7% at 5.5 au. These
results provide new clues for understanding the generation mechanism of SAFs
The creation and propagation of radiation: Fields inside and outside of sources
We present an algorithm for computing the electromagnetic fields due to currents inside and outside of finite sources with a high degree of spatial symmetry for arbitrary time-dependent currents. The solutions for these fields do not involve the time derivatives of the currents but involve only the currents and their time integrals. We give solutions for moving planar sheets of charge, and a rotating spherical shell carrying a uniform charge density. We show that the general solutions reduce to the standard expressions for magnetic dipole radiation for slow time variations of the currents. If the currents are turned on very quickly, the general solutions show that the amount of energy radiated equals the magnetic energy stored in the static fields a long time after current creation. We give three problems which can be used in undergraduate courses and one problem suitable for graduate courses. These problems illustrate that because the generation of radiation depends on what has happened in the past, a system of currents can radiate even during time intervals when the currents are constant due to radiation associated with earlier acceleration
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