A bimodal correlation between host star chromospheric emission and the surface gravity of hot Jupiters

The chromospheric activity index logR'HK of stars hosting transiting hot Jupiters appears to be correlated with the planets' surface gravity. One of the possible explanations is based on the presence of condensations of planetary evaporated material located in a circumstellar cloud that absorbs the CaII H&K and MgII h&k resonance line emission flux, used to measure chromospheric activity. A larger column density in the condensations, or equivalently a stronger absorption in the chromospheric lines, is obtained when the evaporation rate of the planet is larger, which occurs for a lower gravity of the planet. We analyze here a sample of stars hosting transiting hot Jupiters tuned in order to minimize systematic effects (e.g., interstellar medium absorption). Using a mixture model, we find that the data are best fit by a two-linear-regression model. We interpret this result in terms of the Vaughan-Preston gap. We use a Monte Carlo approach to best take into account the uncertainties, finding that the two intercepts fit the observed peaks of the distribution of logR'HK for main-sequence solar-like stars. We also find that the intercepts are correlated with the slopes, as predicted by the model based on the condensations of planetary evaporated material. Our findings bring further support to this model, although we cannot firmly exclude different explanations. A precise determination of the slopes of the two linear components would allow one to estimate the average effective stellar flux powering planetary evaporation, which can then be used for theoretical population and evolution studies of close-in planets.Comment: 23 pages, 4 figures, 1 table, accepted for publication in ApJ

Virtual prototyping of a new intramedullary nail for tibial fractures

In this work a new distal interlocking system has been developed which is easy to use, allows a reduction of the operating time and consequently the exposure to radiations both for surgeon and patient. The main goal of this study has been the design of a new intramedullary nail for tibial fractures able to simplify and speed up the distal locking operation phases. After a preliminary stage during which several candidate concepts have been proposed and analysed, the best solution has been developed and deeply investigated. The new system, called "expansion nail", has been firstly modelled by setting up a full parametric CAD model and, then, tested by running non linear FEM analyses to evaluate stresses and stability of the joining during normal working conditions. The new design has shown very high mechanical stability in the axial compression and torsional load cases. Since its very simple self-locking system, the new expansion intramedullary nail would reduce the operating time and the exposure to radiations for the surgeons as well as the patients

Utilizing the Power of Continuous Process Improvement in Technical Services

In summer 2003 the Lamar Soutter Library initiated a Continuous Process Improvement project. The project’s goal was to reduce time and/or save money by examining and improving work processes. The charge for the Technical Services team was to reduce turnaroud time of certain processes by 50% or more, including (1) book acquisitions (from order to shelving) and (2) implementation of serials title changes. The team utilized value-added flow analysis to examine the processes and then did a six-month pilot project testing their recommendations. The Team met weekly over four months to identify the specific steps involved in each process, review the time involved in completing each task, analyze whether or not the step added value, and suggest improvements to the process. Team members documented and timed current workflow in spreadsheets and flowcharts. The Team proposed a number of procedural changes and initiatives that were accepted by library management for the pilot project. Important components of the implementation were establishing procedures for better communication and additional staff training. The pilot project demonstrated that the streamlined workflow was much more efficient. Value-added flow analysis is a useful tool for continuous process improvement. Technical Services will be better able to serve its internal and external customers

Coming Out of the Back Room: Technical Services Breaks Loose

Objective: Describe how technical services librarians at an academic medical center have embraced opportunities for campus outreach. The Library has long been committed to teamwork. As members of cross-departmental Library teams and campus-wide task forces, technical services librarians have utilized skills in information organization, integrated library systems, and problem solving to benefit colleagues, faculty, clinicians, students, and the public. Methods: Case study: Since the arrival of a new Director in 1998, much of the work of the Library is accomplished through cross-functional teams. Technical services librarians have contributed significantly to these teams and to campus-wide task forces. For a project to create a database of medical images, library catalogers performed crucial roles in developing a database and record structure, maintaining quality control, writing documentation, and training faculty members. This team is now collaborating with Academic Computing staff to develop an institutional repository. Within the Library, a cataloger joined an access services team charged with examining the problem of unreturned books, enhancing the team with skills in integrated library systems, problem solving, and report writing. Recognizing the importance of open access, a technical services librarian organized a well-attended forum and display for the campus and the public. Results: The positive impact of technical services outreach included new and enhanced services and products, professional satisfaction, improved communication among staff, and better access to library materials. Technical services librarians are better known to the larger campus community. Staff development, collaboration, and outreach were enhanced by a Library renovation that kept the Technical Services department in close proximity to public services areas and the Library training room. In the Library there is now a true partnership with public services staff, and an increased appreciation for the skill set of technical services librarians. Conclusions: Technical Services librarians should not hesitate to break out of the back room and participate in outreach activities. Their skills can be of tremendous value to cross-departmental library teams and broader efforts. This outreach benefits the librarians, the Library, and the user community. Presented at the Medical Library Association Annual Meeting, San Antonio, TX, on May 15, 2005

A reverse engineering approach to measure the deformations of a sailing yacht

In this work, a multidisciplinary experience, aimed to study the permanent deformations of the hull of a regatta sailing yacht is described. In particular, a procedure to compare two different surfaces of the hull of a small sailing yacht, designed and manufactured at the University of Palermo, has been developed. The first one represents the original CAD model while the second one has been obtained by means of a reverse engineering approach. The reverse engineering process was performed through an automatic close-range photogrammetry survey, that has allowed to obtain very accurate measures of the hull, and a 3D modelling step by the well-known 3D computer graphics software Rhinoceros. The reverse engineering model was checked through two different procedures implemented by the graphical algorithm editor Grasshopper. The first procedure has allowed to compare the photogrammetric measurements with the rebuilt surface, in order to verify if the reverse engineering process has led to reliable results. The second has been implement to measure the deviations between the original CAD model and the rebuilt surface of the hull. This procedure has given the possibility to highlight any permanent deformation of the hull due to errors during the production phase or to excessive loads during its use. The obtained results have demonstrated that the developed procedure is very efficient and able to give detailed information on the deviation values of the two compared surfaces

A new design approach to the use of composite materials for heavy transport vehicles

In order to keep or to reach a high level of competitiveness and performance of a product, it is necessary to explore all the possible solutions that allow the best compromise between costs and project requirements. By this point of view the study of alternative designs and/or materials to use, is an important aspect that can identify a new concept or way of thinking about a product. This paper presents how to make use of composite materials in the field of heavy vehicles transportation. A new semitrailer in composite material has been designed, using a methodical redesign approach and an optimisation process. The main innovation in this project is, besides the use of the Glass Fibre Reinforced Plastics (GFRPs), also a new topology of the vehicle frame; the designed semitrailer, in fact. has a monocoque structur

New Partnerships for a New Generation

Objective:This poster will demonstrate how partnering with civic and community organizations to host a traveling exhibit helps the library reach beyond its primary clientele to: 1) heighten awareness of the historical roles of women physicians, 2) encourage young women to enter the medical fields, 3) promote medical librarians and library services, and 4) increase visibility of the medical school. Method:In the summer of 2004, a core group of library staff gathered to prepare the application to host the ALA/NLM traveling exhibit, “Changing the Face of Medicine: Celebrating America’s Women Physicians.” Once selected as a host site, the group reached out to a diverse mix of academic and administrative staff from across the Medical School, as well as members of the local community. This group became the formal steering committee to plan programming to accompany the exhibit, helping meet the educational and promotional goals set forth in the initial application. Some outreach events included movie nights at the public library, an essay contest for grade school students, a career day with Girl Scouts, a review of research in women’s health (WHI), etc. Promotional methods/vehicles included “save the date” postcards, flyers, posters, and coverage through area radio, television, and newspapers. Results:Seventeen events were held in conjunction with the Library’s hosting of the exhibit. During the six-week period, approximately 60,000 individuals visited the Library, more than 750 specifically devoted to viewing the display. Two hundred people from the medical school community and the public at large attended the opening ceremony, 100 area Girl Scout members participated in multiple educational events, local middle and high school students took part in an essay contest, and more than 100 people attended book signings, film screenings, and a dramatic performance about Elizabeth Blackwell. Six groups provided financial support of the exhibit, totaling more than $7,000. Conclusion:The exhibit encouraged new experiences for Library staff including collaboration, marketing and outreach to a wider audience. It introduced many first-time Library visitors to a valued local resource, helped develop relationships between medical school students and the public, and introduced a different and important historical perspective on medicine to all. Presented at the Medical Library Association Annual Meeting on May 20, 2007, in Philadelphia, PA

Utilizing the Power of Continuous Process Improvement in Technical Services

Objective: Examine the efficiency of work processes in the Technical Services Department, with the goal of reducing the turnaround time by 50% or more for three specific processes: (1) acquiring books for requestors; (2) implementing serials title changes; and (3) handling of journal issues from receipt to binding. Method: In summer 2003 the Library initiated a Continuous Process Improvement project. The project’s goal is to reduce time and/or save money by examining and improving work processes. The charge for the Technical Services team is to (1) reduce the turnaround time by 50% or more for firm orders from when the book is ordered to when it reaches the requestor; (2) reduce the time it takes by 50% or more to implement a serials title change, which involves staff throughout the library; and (3) reduce the time it takes by 50% or more for a newly-received journal issue to reach the shelf and eventually be bound. The team is utilizing value-added flow analysis to examine the processes and will make recommendations to management for changes to be implemented in a pilot project. Results: The Team met weekly over four months to identify the specific steps involved in each process, review the time involved in completing each task, analyze whether or not the step added value, and suggest improvements to the process. Team members documented and timed current workflow in spreadsheets and flowcharts. The Team proposed a number of procedural changes and initiatives that were accepted by library management for a five-month pilot project which is now ongoing. Important components of the implementation are establishing procedures for better communication and additional staff training. Conclusion: Value-added flow analysis is a useful tool for continuous process improvement. The Library’s goal of reducing turnaround time by 50% or more for these three specific processes will be achieved, as demonstrated in the pilot project. Technical Services will be better able to serve its internal and external customers. Presented at the Medical Library Association Annual Meeting, Washington, DC, on May 25, 2004