Use of Craigslist.org to Hook Up: Age Differences in Sex Requests, HIV Disclosure and Negotiated Safety among Men-Seeking-Men

Data from 984 “men-seeking-men” Craigslist.org postings in five cities were analyzed to assess differences in sexual requests, HIV status disclosure, and negotiated safety between young (18-24 years) and older (25 years and older) men who have sex with men (MSM). Young MSM were less likely than older MSM to post their HIV status or the preferred status of a partner (p=0.04), disclose and/or request a partner who was disease and drug free (p=.01), and request use of a condom in their posting (p=0.01). Interventions aimed at changing the culture and content of postings on Craigslist.org by encouraging HIV status disclosure and condom use preference are warranted, particularly for young MSM

Some Remarks on the Morphosemantics of Multiple Causative Sequences

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A Fire to be Lighted: The Training of American Astronauts From 1959 to the Present

This study examines the training of American astronauts from the selection of the original Mercury astronauts in 1959 to the present, as crews of six work aboard the International Space Station. It makes the primary argument that through all of those years, the training sequence has successfully adapted to the challenges of preparing astronauts for flight far more than it has failed. It will examine in more detail than any previous publication how training devices for the Mercury, Gemini, Apollo, Skylab, Space Shuttle, and International Space Station programs helped astronauts to make this statement true. This study will also make the argument that the successful training of astronauts helped prove the value of sending them into space. Sessions at a variety of locales, from electronic flight simulators, to neutral buoyancy pools, to virtual reality laboratories have given astronauts the mental and physical flexibility in space missions that only they possess. In other words, they are not automatons, but rather people who can develop their skills through training. This study will demonstrate that when their missions began, those skills contributed to spectacular successes in space. Astronauts have returned a bevy of scientific data from their scientific experiments in Earth orbit and from their walks on the Moon during Apollo thanks to their trained eyes and minds. They have also serviced the Hubble Space Telescope and constructed an International Space Station that is longer than a football field thanks to their training. As the 21st century continues, astronauts will journey on bolder missions to near Earth asteroids, back to the Moon, and onto Mars. The instructors who train them for those missions, whether belonging to a government or a company, will benefit from reading this study because they will gain a sense of what training methods have worked historically and understand the tremendously strong track record of human accomplishments in space given adequate training

The Spitzer c2d Survey Of Nearby Dense Cores. X. Star Formation In L673 And Cb188

L673 and CB188 are two low-mass clouds isolated from large star-forming regions that were observed as part of the Spitzer Legacy Project "From Molecular Clouds to Planet Forming disks" (c2d). We identified and characterized all the young stellar objects (YSOs) of these two regions and modeled their spectral energy distributions (SEDs) to examine whether their physical properties are consistent with values predicted from the theoretical models and with the YSO properties in the c2d survey of larger clouds. Overall, 30 YSO candidates were identified by the c2d photometric criteria, 27 in L673 and 3 in CB188. We confirm the YSO nature of 29 of them and remove a false Class III candidate in L673. We further present the discovery of two new YSO candidates, one Class 0 and another possible Class I candidate in L673, therefore bringing the total number of YSO candidates to 31. Multiple sites of star formation are present within L673, closely resembling other well-studied c2d clouds containing small groups such as B59 and L1251B, whereas CB188 seems to consist of only one isolated globule-like core. We measure a star formation efficiency (SFE) of 4.6%, which resembles the SFE of the larger c2d clouds. From the SED modeling of our YSO sample we obtain envelope masses for Class I and Flat spectrum sources of 0.01-1.0 M-circle dot. The majority of Class II YSOs show disk accretion rates from 3.3 x 10(-10) to 3 x 10(-8) M-circle dot yr(-1) and disk masses that peak at 10(-4) to 10(-3) M-circle dot. Finally, we examined the possibility of thermal fragmentation in L673 as the main star-forming process. We find that the mean density of the regions where significant YSO clustering occurs is of the order of similar to 10(5) cm(-3) using 850 mu m observations and measure a Jeans Length that is greater than the near-neighbor YSO separations by approximately a factor of 3-4. We therefore suggest that other processes, such as turbulence and shock waves, may have had a significant effect on the cloud's filamentary structure and YSO clustering.University of SouthamptonNASA 1279198, 1288806, 1365763Jet Propulsion Laboratory, California Institute of TechnologyAstronom

Changing Campustown

Mickey’s Irish Pub was not filled with the usual smell of stale beer and the slurred pick-up lines. Instead, its dwellers asked questions and raised concerns about the project LANE4 Property Management and the City of Ames plans to wreak on Campustown in as little as a year. Business owners crowded onto the sticky floors of the popular bar on Welch Avenue in hopes to get their questions answered and an understanding on where the LANE4 wrecking ball would be making its impression. Tim Schrum, general manager of Mickey’s, organized the meeting March 3 so Campustown business and property owners could ask questions about the future of their businesses, and they heard advice from a lawyer who was present

VikingBot: The StarCraft Artificial Intelligence

VikingBot is an automated AI that plays StarCraft by using a combination of machine learning and artificial intelligence. High level strategies are planned using the Brown-UMBC Reinforcement Learning and Planning (BURLAP), library which implements planning algorithms and provides interfaces for defining a domain and models of that domain for planning. For the planning, we used the BURLAP implementation of the sparse sampling algorithm because the time complexity is independent of the size of the state space, and we have to plan quickly in real time. SARSA reinforcement learning is used for a machine learning model that controls combat units. Various other helping functions are distributed to agent classes that aid in the AI in the different areas of the game. These agents are categorized as strategy, economy, combat, and intelligence. By using these parts in tandem VikingBot aims to use less training resources and still be able to play games at a high enough level to beat a human player

The modern use of the extended humeral head (cuff tear arthropathy) hemiarthroplasty.

Today, the treatment of osteoarthritis in the rotator cuff-deficient population is largely dominated by reverse shoulder arthroplasty (RSA). Despite the popularity of and increased familiarity with this procedure, the complication rate of RSA remains significant. An extended humeral head hemiarthroplasty may provide a less invasive alternative for select patients with cuff tear arthropathy (CTA) and preserved glenohumeral active elevation. With the indications for reverse arthroplasty expanding to younger patients, there are concerns about the longevity of this implant, as well as the associated revision burden. In the setting of failed RSA, the bone stock available for glenosphere baseplate fixation can be inadequate for reimplantation. The treatment strategies for complex shoulder deformities and failed RSA are limited by patient-specific issues, such as anatomy and risk factors. In this review, we discuss the potential role of extended humeral head hemiarthroplasty (CTA hemiarthroplasty) as a primary surgical option in select patients (1) who have preserved elevation \u3e 90°, (2) who have maintained stability (intact coracoacromial ligament), and (3) who desire to circumvent the complications associated with RSA. Furthermore, CTA hemiarthroplasty may be used for severe glenoid erosion, for a fragmented acromion, and in the revision setting for failed RSA aimed at a reliable salvage procedure