CDM simulations predict that there are hundreds of lumps of with masses greater than 10M⊙ in the Milky Way halo. However, we know of only a dozen dwarf satellites close to this mass. Are these lumps simply lacking in stars or is there a fundamental flaw in our most popular cosmology? By studying the tidal debris of known satellites we can potentially address this question. In this paper, we qua...

The extremely young cluster IC 348 has been monitored photometrically over 5 observing seasons from Dec 1998 to March 2003 in Cousins I with a 0.6 m telescope at Van Vleck Observatory. Twenty-eight periodic variables and 16 irregular variables have been identified. The variability study is most sensitive for stars with I < 14.3 mag; at that brightness level we find that 24 of the 27 known PMS c...

damage to essential facilities (e.g. lifelines and industrial facilities) due to extreme loads may cause remarkable indirect impact as well as direct physical loss. hence understanding seismic performance of essential facilities is very important in high seismic risk regions. on october 23, 2011 an earthquake of magnitude mw7.2 occurred in van province in eastern turkey. several damages occurre...

hypothyroidism is usually associated with delayed pubertal development but in rare occasions precocious puberty may ensue which is seen in cases of prolonged and untreated hypothyroidism. this is also called the van wyk grumbach syndrome. here we present 4 cases of precocious puberty due to hypothyroidism.

The method of continuous saturation has been used to measure the electron spin relaxation parameter T1T2 at temperatures between 10 and 50 K for a variety of S = 1/2 species including: CuA and cytochrome a of cytochrome c oxidase, the type 1 copper in several blue copper proteins, the type 2 copper in laccase, inorganic Cu(II) complexes, sulfur radicals, and low spin heme proteins. The temperat...

Convenient, high-yield routes have been developed to [Fe 10(OMe) 20(O 2CR) 10] ( 1) "ferric wheels" involving the alcoholysis of [Fe 3O(O 2CR) 6(H 2O) 3] (+) salts in MeOH in the presence of NEt 3. Reactivity studies have established [Fe 10(OMe) 20(O 2CMe) 10] ( 1a) to undergo clean carboxylate substitution with a variety of other RCO 2H groups to the corresponding [Fe 10(OMe) 20(O 2CR) 10] pro...

The temperature dependence of Knight shift of Sn119 in SmSn3 does not follow the prediction of White and Van Vleck. This anomalous behaviour 1s explained as due to the mixing of excited (J = 712) state into ground state of Sm3+ion by strong crystalline fields. The effect of strong crystalline fields on i S, > and x, is shown. There have been several studies of the Knight shift and susceptibilit...

High-field susceptibility XHF in Fe and Ni (at 4.2, 77, and 300 K) and high-field Mossbauer studies in Fe at 4.2°K are reported and related to the band structure of Fe and Ni and to band models of ferromag­ netism. The Mossbauer effect was employed to measure the change in the hyperfine field H n at the 57Fe nucleus with application of an external field. Assuming H n to be proportional to the b...

We examine the detectability and interpretation of debris trails caused by satellite disruption in external galaxies using semi-analytic approximations for the dependence of streamer length, width and surface brightness on satellite and primary galaxy characteristics. The semi-analytic method is tested successfully against N-body simulations and then applied to three representative astronomical...

The American Association for the Advancement of Scientific Books: Science: van Vleck 's Theory of Electric and Magnetic The Sixteenth Annual Meeting of the Pacific DiviSusceptibilities: DR. PHILIP M. MORSE .............................. 326 sion: DR. J. MURRAY LUCK ........................... 303 Scientific Apparatus and Laboratory Methods: A Universal Precision Stimulator: OTTO H. A. Obituary:...