Cayley graphs generated by small degree polynomials over finite fields

We improve upper bounds of F. R. K. Chung and of M. Lu, D. Wan, L.-P. Wang, X.-D. Zhang on the diameter of some Cayley graphs constructed from polynomials over finite fields

Deployment/retraction ground testing of a large flexible solar array

The simulated zero-gravity ground testing of the flexible fold-up solar array consisting of eighty-four full-size panels (.368 m x .4 m each) is addressed. Automatic, hands-off extension, retraction, and lockup operations are included. Three methods of ground testing were investigated: (1) vertical testing; (2) horizontal testing, using an overhead water trough to support the panels; and (3) horizontal testing, using an overhead track in conjunction with a counterweight system to support the panels. Method 3 was selected as baseline. The wing/assembly vertical support structure, the five-tier overhead track, and the mast-element support track comprise the test structure. The flexible solar array wing assembly was successfully extended and retracted numerous times under simulated zero-gravity conditions

“Sorry is the hardest word”: apologies in the media and corporate world

We’re delighted to announce Nina M. Chung as the winner of the StockWell Communications Polis Research Prize. This year, the award went to the best research proposal by an LSE post-graduate student on the topic of ‘Corporate Reputation, Media and Society’. Nina will be spending time later this year with StockWell on a paid internship to carry out more work on her research topic. Nina’s proposal is published in full below

American Image of President Park Chung-hee of the Republic of Korea: Park Chung-heeas Death and American Newspapers

South Korea s President Park Chung-hee was still a controversial figure in Korean history He was a man who achieved the economic miracle of South Korea while adopting repressive measures to suspend the democracy and human Korea The nostalgia of Park s era also remains Park receives fairly good evaluations from the world American newspapers at the death of Park Chung-hee provided the objective views on Park Chung-hee Throughout the newspapers editorials Park was the man who brought the economic miracle of South Korea and a good ally for the U S at the time of Cold War On the other hand he was another dictator who enjoyed autocratic rule under the U S protection The American views provide the foundation to evaluate Park Chung-hee of toda

Results of bottom trawl surveys carried out in Vietnamese waters (20-200 m) in 1996-1997

Bottom trawl surveys were conducted in the southwest monsoon season in 1996 (survey 1) and in the northeast monsoon season in 1996-97 (survey 2) throughout Vietnamese waters. The surveys mainly covered the depth zone 50-200 m but in the northeast monsoon season the depth zone 20-50 m was included in the northern and southern areas. Overall, 273 trawl hauls were conducted. The total biomass for Vietnamese waters in the depth zone 20-200 m was estimated at 700 000 t . Biomass estimates are given for the most abundant species. A relatively higher mean catch-per-unit effort (CPUE) was obtained from survey 2 than from survey 1 and in partcular at depth ranges 50-100 and 100-200 m in south Vietnam. Overall, the dominant families were Monacanthidae (34%), Carangidae (15%), Trichiuridae (9%) and Synodontidae (6%)

Space-charge compensation experiments at IOTA ring

Space-charge effects belong to the category of the most long-standing issues in beam physics, and even today, after several decades of very active exploration and development of counter-measures, they still pose the most profound limitations on performance of high intensity proton accelerators. We briefly consider past experience in active compensation of these effects and present in detail the progress towards experimental studies of novel schemes of space-charge compensation at the Fermilab's IOTA ring.Comment: 5 p

Aldosterone Antagonists in Addition to Renin Angiotensin System Antagonists for Preventing the Progression of CKD: Editorial Summary of a Cochrane Review

No abstract availabl