Appropriate counseling approach to disclose HIV status to HIV-infected children: Chiradzulu, Malawi

Mexico AIDS Conference 200

Detection of app collusion potential using logic programming

Mobile devices pose a particular security risk because they hold personal details (accounts, locations, contacts, photos) and have capabilities potentially exploitable for eavesdropping (cameras/microphone, wireless connections). The Android operating system is designed with a number of built-in security features such as application sandboxing and permission-based access control. Unfortunately, these restrictions can be bypassed, without the user noticing, by colluding apps whose combined permissions allow them to carry out attacks that neither app is able to execute by itself. While the possibility of app collusion was first warned in 2011, it has been unclear if collusion is used by malware in the wild due to a lack of suitable detection methods and tools. This paper describes how we found the first collusion in the wild. We also present a strategy for detecting collusions and its implementation in Prolog that allowed us to make this discovery. Our detection strategy is grounded in concise definitions of collusion and the concept of ASR (Access-Send-Receive) signatures. The methodology is supported by statistical evidence. Our approach scales and is applicable to inclusion into professional malware detection systems: we applied it to a set of more than 50,000 apps collected in the wild. Code samples of our tool as well as of the detected malware are available

A Survey of Wearable Biometric Recognition Systems

The growing popularity of wearable devices is leading to new ways to interact with the environment, with other smart devices, and with other people. Wearables equipped with an array of sensors are able to capture the owner’s physiological and behavioural traits, thus are well suited for biometric authentication to control other devices or access digital services. However, wearable biometrics have substantial differences from traditional biometrics for computer systems, such as fingerprints, eye features, or voice. In this article, we discuss these differences and analyse how researchers are approaching the wearable biometrics field. We review and provide a categorization of wearable sensors useful for capturing biometric signals. We analyse the computational cost of the different signal processing techniques, an important practical factor in constrained devices such as wearables. Finally, we review and classify the most recent proposals in the field of wearable biometrics in terms of the structure of the biometric system proposed, their experimental setup, and their results. We also present a critique of experimental issues such as evaluation and feasibility aspects, and offer some final thoughts on research directions that need attention in future work

Amplitude, Latency, and Peak Velocity in Accommodation and Disaccommodation Dynamics.

The aim of this work was to ascertain whether there are differences in amplitude, latency, and peak velocity of accommodation and disaccommodation responses when different analysis strategies are used to compute them, such as fitting different functions to the responses or for smoothing them prior to computing the parameters. Accommodation and disaccommodation responses from four subjects to pulse changes in demand were recorded by means of aberrometry. Three different strategies were followed to analyze such responses: fitting an exponential function to the experimental data; fitting a Boltzmann sigmoid function to the data; and smoothing the data. Amplitude, latency, and peak velocity of the responses were extracted. Significant differences were found between the peak velocity in accommodation computed by fitting an exponential function and smoothing the experimental data (mean difference 2.36 D/s). Regarding disaccommodation, significant differences were found between latency and peak velocity, calculated with the two same strategies (mean difference of 0.15 s and -3.56 D/s, resp.). The strategy used to analyze accommodation and disaccommodation responses seems to affect the parameters that describe accommodation and disaccommodation dynamics. These results highlight the importance of choosing the most adequate analysis strategy in each individual to obtain the parameters that characterize accommodation and disaccommodation dynamics

Evaluation of the iridocorneal angle with accommodation using optical coherence tomography.

The changes in the iridocorneal angle structure during accommodation are assessed by means of anterior segment optical coherence tomography. Thirteen right eyes were included in the study. The device used for the measurement was the Visante®omni system. The stimuli were set up at different vergences (0.0 D, -1.5 D, and -3.0 D). The angle opening distance 500 and 750, the trabecular iris space area 500 and 750, and the scleral spur angle parameters were assessed at the nasal and temporal regions. The results in the iridotrabecular angle comparing the three accommodative states of the eye did not yield any statistically significant difference at nasal or temporal angle sections. In light of our results and in the conditions of our study, the structures of the iridocorneal angle are not significantly changed with accommodation

All laser-assisted heteroepitaxial growth of Si0.8Ge0.2 on Si(100): Pulsed laser deposition and laser induced melting solidification

3 pages, 3 figures.The growth of heteroepitaxial Si0.8Ge0.2 films on Si(100) by a novel all laser-assisted technique using only ArF excimer laser radiation is demonstrated. Amorphous 30 nm thick films are grown by pulsed laser deposition from alternating pure Si and Ge targets on clean Si substrates. Melting and rapid solidification is then induced by pulsed irradiation (0.54 J/cm2), promoting epitaxial growth.This work has been partially supported by CICYT under project MAT93-0053 and the JNICT-CSIC agreement for traveling finances.Peer reviewe

Análisis comparativo de explotaciones de vacuno de leche especializadas y mixtas en Aragón.

publishedTomo I . Sección: Sistemas Ganaderos-Economía y Gestión. Sesión: Producción de leche. Ponencia nº 2

Estudio descriptivo sobre el proceso de comunicar el diagnóstico y el pronóstico en oncología

Comunicar malas noticias es una tarea compleja. Más aún cuando la enfermedad a comunicar incluye la palabra cáncer. Este tér¬mino que tiene connotaciones culturales nega¬tivas, tiene además una enorme variabilidad de enfoques en los diferentes países. El objetivo de este trabajo fue profundizar en el proceso de comunicación diagnóstica entre el médico oncólogo, los pacientes y la familia. Por ello, en primer lugar queríamos conocer la informa¬ción que tiene el paciente sobre su enfermedad antes de la primera entrevista con el oncólogo y, en segundo lugar conocer que expresiones se utilizan para informar sobre el diagnóstico y el pronóstico a los pacientes. La muestra es¬tuvo compuesta por 105 pacientes nuevos con diagnóstico de cáncer. Para ello se diseñó una hoja de recogida de datos de la primera entre¬vista. Los resultados obtenidos nos indican que los pacientes acuden a la primera entrevista con información variable, algunos han reci¬bido información específica, otros, ninguna información o esta es inespecífica. Respecto al diagnóstico, ocurre que muchos de los pa¬cientes salen de la primera consulta sin haber escuchado que padecen un tipo de cáncer. Y además, la mayoría obtienen la información del posible pronóstico de su enfermedad. Por tanto, el oncólogo en su primera visita con el paciente recoge la información previa que éste tiene, la reconstruye y modela en términos de “verdad soportable”, por tanto, la información se va adaptando a la necesidad del paciente.Giving bad news is hard work. Even more when the illness you must tell your patient in¬cludes the world cancer. The aim of this work was to study in depth how the news of a ter¬minal illness was broken among oncologist doctor, patients and family. Therefore, first we wanted to know what the patient knew about his illness before the first appointment with the oncologist. Second we wanted to know what kinds of expressions are used to inform the patients about the diagnosis and the prog¬nosis. The sample was made up of 105 new patients with a cancer diagnosis. Therefore a first data page was made for the first interview. The results show us that the patients went to the appointment with a variety of knowled¬ge, some of them having specific information; others knew nothing or just a little. Regarding to the diagnosis, a lot of patients left the first appointment without hearing that they suffered from some kind of cancer. They mostly obtain the information of the possible prognosis of their illness, in this moment. The¬refore, in the first appointment the oncologist gets to know what information the patient has previously. Then he remakes and shapes the information to build a “bearable truth”, so the information gets adjusted to what the patient needs