Dark Matter in Modern Cosmology

The presence of Dark Matter (DM) is required in the universe regulated by the standard general relativistic theory of gravitation. The nature of DM is however still elusive to any experimental search. We discuss here the process of accumulation of evidence for the presence of DM in the universe, the astrophysical probes for the leading DM scenarios that can be obtained through a multi-frequency analysis of cosmic structures on large scales, and the strategies related to the multi-messenger and multi-experiment astrophysical search for the nature of the DM.Comment: 25 pages, 9 figures. Updated version of the review included in ASTROPHYSICS AND COSMOLOGY AFTER GAMOW: Proceedings of the 4th Gamow International Conference on Astrophysics and Cosmology After Gamow and the 9th Gamow Summer School "Astronomy and Beyond: Astrophysics, Cosmology, Radio Astronomy, High Energy Physics and Astrobiology". AIP Conference Proceedings, Volume 1206, p.

Constructing a Theory of Educational Administration

The development of administrative theory has long been a quest for scholars in the field of educational administration. The beginnings of the development of a theory of educational administration began with Griffiths‘ (1959) now classic Administrative Theory, where he outlined the problem and noted, ―The field [of educational administration] is no longer neatly defined [and] textbooks are characterized by a search for the substance of administration and for a theory which binds the substance together‖ (p. 1-2). The need for such a theory has been important because a theory could serve to guide and support practice, even though the link between theory and practice has not always been articulated. In addition, the complex interactive nature of educational administration and the different school contexts have made it difficult to establish a uniform administrative theory. English (2002) called the theory-practice gap the ―Gordian Knot.‖ He noted, ―The theory-practice gap is a direct result of continuing to use inductive methods in creating theories for use in studying schools and the practices in them. The creation of … theories in educational administration … are not likely to come about under the way theories are constructed…in much of the present research‖ (p. 3)

Of Monsters, Myths and Marketing: The Case of the Loch Ness Monster

This paper examines the status of the Loch Ness Monster within a diverse body of literature relating to Scotland. Within cryptozoology this creature is considered as a source of investigation, something to be taken seriously as a scientific or quasi-scientific object to be studied and known, particularly in light of its elusive nature. In terms of mythology the creature is bound up with Scottish cultural identifications through references to a rugged wilderness landscape and to iconic, if stereotypical, images of tartanry, bygone castles, and folklore. Both sets of ideas have been used with great effect to generate a diversity of literature: from books and scientific papers that chronicle the sightings and “hunt” for the creature as well the possible case for it being a line of long-surviving plesiosaurs, through to children’s literature that deals with the mythic element that is so often used to appeal to childhood imagination, and on to a plethora of tourist marketing booklets and brochures

Search for the Elusive Higgs Boson Using Jet Structure at LHC

We consider the production of a light non-standard model Higgs boson of order 100~\GEV with an associated $W$ boson at CERN Large Hadron Collider. We focus on an interesting scenario that, the Higgs boson decays predominately into two light scalars $\chi$ with mass of few GeV which sequently decay into four gluons, i.e. $h\to 2\chi \to 4g$. Since $\chi$ is much lighter than the Higgs boson, it will be highly boosted and its decay products, the two gluons, will move close to each other, resulting in a single jet for $\chi$ decay in the detector. By using electromagnetic calorimeter-based and jet substructure analyses, we show in two cases of different $\chi$ masses that it is quite promising to extract the signal of Higgs boson out of large QCD background.Comment: 20 pages, 7 figure

A Conversation with Monroe Sirken

Born January 11, 1921 in New York City, Monroe Sirken grew up in a suburb of Pasadena, California. He earned B.A. and M.A. degrees in sociology at UCLA in 1946 and 1947, and a Ph.D. in 1950 in sociology with a minor in mathematics at the University of Washington in 1950 where Professor Z. W. Birnbaum was his mentor and thesis advisor. As a Post-Doctoral Fellow of the Social Science Research Council, Monroe spent 1950--1951 at the Statistics Laboratory, University of California at Berkeley and the Office of the Assistant Director for Research, U.S. Bureau of the Census in Suitland, Maryland. Monroe visited the Census Bureau at a time of great change in the use of sampling and survey methods, and decided to remain. He began his government career there in 1951 as a mathematical statistician, and moved to the National Office of Vital Statistics (NOVS) in 1953 where he was an actuarial mathematician and a mathematical statistician. He has held a variety of research and administrative positions at the National Center for Health Statistics (NCHS) and he was the Associate Director, Research and Methodology and the Director, Office of Research and Methodology until 1996 when he became a senior research scientist, the title he currently holds. Aside from administrative responsibilities, Monroe's major professional interests have been conducting and fostering survey and statistical research responsive to the needs of federal statistics. His interest in the design of rare and sensitive population surveys led to the development of network sampling which improves precision by linking multiple selection units to the same observation units. His interest in fostering research on the cognitive aspects of survey methods led to the establishment of permanent questionnaire design research laboratories, first at NCHS and later at other federal statistical agencies here and abroad.Comment: Published in at http://dx.doi.org/10.1214/07-STS245 the Statistical Science (http://www.imstat.org/sts/) by the Institute of Mathematical Statistics (http://www.imstat.org

Proposal for an Experiment to Test a Theory of High Temperature Superconductors

A theory for the phenomena observed in Copper-Oxide based high temperature superconducting materials derives an elusive time-reversal and rotational symmetry breaking order parameter for the observed pseudogap phase ending at a quantum-critical point near the composition for the highest $T_c$. An experiment is proposed to observe such a symmetry breaking. It is shown that Angle-resolved Photoemission yields a current density which is different for left and right circularly polarized photons. The magnitude of the effect and its momentum dependence is estimated. Barring the presence of domains of the predicted phase an asymmetry of about 0.1 is predicted at low temperatures in moderately underdoped samples.Comment: latex, 2 figure