A Concurrent Language with a Uniform Treatment of Regions and Locks

A challenge for programming language research is to design and implement multi-threaded low-level languages providing static guarantees for memory safety and freedom from data races. Towards this goal, we present a concurrent language employing safe region-based memory management and hierarchical locking of regions. Both regions and locks are treated uniformly, and the language supports ownership transfer, early deallocation of regions and early release of locks in a safe manner

Spaces of Collapse: Psychological Deterioration, Subjectivity, and Spatiality in American Narratives

This thesis studies the relationship between spatiality and subjectivity within the context of modern and contemporary American narrative. Combining a psychoanalytic approach with phenomenological considerations, I set out to analyze the ways in which spatial structures mediate madness, paranoia, the compulsion to repeat, and uncanny anxiety. Space serves a primary focus of my analysis, and I outline the different ways that language and consciousness construct space. Considering the work of William Faulkner, Francis Ford Coppola, Paul Auster, and Mark Z. Danielewski, I argue that particular spaces, such as houses and cities, represent or contribute to particular forms of psychological psychosis and neurosis. While I use phenomenology as an important guide to understand the relationship between subjectivity and space, my primary concern is tracing out the psychoanalytic subject’s dependence on spatial orientation. Ultimately, I conclude that spatiality offers a key to understanding the basic instability that lies at the heart of the psychoanalytic subject

Supporting Separate Compilation in a Defunctionalizing Compiler

Defunctionalization is generally considered a whole-program transformation and thus incompatible with separate compilation. In this paper, we formalize a modular variant of defunctionalization which can support separate compilation. Our technique allows modules in a Haskell-like language to be separately defunctionalized and compiled, then linked together to generate an executable program. We provide a prototype implementation of our modular defunctionalization technique and we discuss the experiences of its application in a compiler from a large subset of Haskell to low-level C code, based on the intensional transformation

Negotiation-based Choreography of Data-intensive Applications in the C3Grid Project

We present a negotiation and agreement strategy and protocol for the efficient scheduling of data intensive jobs in the Grid. It was developed with the background of the Collaborative Climate Community Data and Processing Grid (C3Grid), which provides a comprehensive infrastructure for solving computational problems in Earth System Science. The presented solution is a subset of the overall C3Grid architecture and especially focuses on the collaboration of Data Management and Workflow Scheduling. We evaluate our approach on a case study representing a complex application typical for climate research. Finally, extensions for future work – especially on standardization efforts – are reviewed

Toward an open cloud standard

Today's cloud ecosystem features several increasingly divergent management interfaces. Numerous bridging efforts attempt to ameliorate the resulting vendor lock-in for customers. However, as the number of providers continues to grow, the drawback of this approach becomes apparent: the need to maintain adapter implementations. The Open Cloud Computing Interface builds on the fundamentals of modern Web-based services to define a standardized interface for cloud environments while enabling service providers to differentiate their service offerings at the same time

Development of a prototype for submarine communications in shallow waters

The Telecommunications Marine Laboratory (TML) of the University of Cádiz takes part in a research project to study the intertidal sediments of the Bay of Cádiz. The collection of samples from the seabed and the transmission of data to the surface are performed by a Mini Profiler with four channels (MP4), which is supplied by UNISENSE. Each channel processes the samples collected by a single sensor. For power, control, and data transmission, a special wiring that connects the submerged subsystem with the surface subsystem is used. The tension transmitted by the cable to the MP4 structure makes its handling and positioning under water more difficult. This article explains the technological solution developed by the TML to replace some wiring from the MP4. For the prototype, two underwater acoustic modems have been used and an electronic system has been developed based on the Arduino platform, in order to multiplex, digitize, and transmit the data collected by the MP4 sensors, eliminating the need to use wiring. The submerged subsystem has an autonomous power supply by a battery.Peer Reviewe

Retrospektive Untersuchungen zum intra- und frühen postoperativen Verlauf bei der Exstirpation der Glandula submandibularis

Die häufigste Erkrankung der Glandula submandibularis stellt die Sialolithiasis dar. Die Sialolithiasis kommt in Kombination mit der Sialadenitis 10-mal häufiger im Bereich der Glandula submandibularis als in der Glandula parotis vor. Andere Erkrankungen wie gutartige und bösartige Tumore der Drüse sind seltener. Der häufigste gutartige Tumor der Glandula submandibularis ist das pleomorphe Adenom, wobei die adenoidzystischen Karzinome die häufigsten bösartigen Tumore sind [73, 85]. Die meisten submandibulären Prozesse sind durch eine submandibuläre Schwellung, die häufig nahrungsabhängig ist, sowie ein subjektives Fremdkörpergefühl charakterisiert. Chirurgie ist die Therapie der Wahl bei intraglandulärer Sialolithiasis und Tumoren der Glandula submandibularis. Im Fall maligner Tumore kann die Neck Dissektion indiziert sein. Die Exstirpation über einen transzervikalen Zugang gilt als Standardmethode der Therapie der Glandula submandibularis Erkrankungen. Seit einigen Jahren wird das therapeutische Verfahren jedoch kontrovers diskutiert. Während einige Autoren die Exstirpation der Glandula submandibularis über einen transzervikalen Zugang als Therapie der Wahl sehen [5, 7, 73, 99], sprechen sich andere Chirurgen für eine transorale Exstirpation der Glandula submandibularis aus [25, 38, 48, 51]. Andere innovative Zugänge, wie der retroaurikäre [77], der submentale [78], der kombinierte retroaurikuläre und transorale [14] und der durch eine posteriore Haarlinien-Inzision, [83] werden als Einzelfälle berichtet. Die intraorale Steinexstirpation mit Organerhalt [16, 29, 75], die Sialendoskopie mit Steinexstirpation [107, 109] und die extrakorporale Lithotripsie [104] sind interessante alternative Methode zur Exstirpation der Drüse, führen aber meistens zu höheren Rezidivraten im Vergleich zur kompletten Entfernung der Drüse bei Patienten mit Sialolithiasis [16, 104, 107]. Die Verletzung des Ramus marginalis des Nervus facialis gilt als die häufigste Nervenkomplikation im Rahmen der Exstirpation der Glandula submandibularis über einen transzervikalen Zugang, da hier sowohl der Nervus lingualis als auch der Nervus hypoglossus verletzt werden können. Diese Komplikationen sind meistens 7 transient und seltener persistent [5, 63, 73, 99]. Blutungskomplikationen in Form von Hämatomen und Seromen werden selten beobachtet und sind am Tag der Entlassung häufig nicht mehr vorhanden [73]. Bei pathologischen Befunden im Bereich der Glandula submandibularis gehört die Sonographie zum diagnostischen Standard. Der Ultraschall ist besonders zur Entdeckung der Speichelsteine geeignet. Ferner können MR-Sialographie, CT oder MRT erforderlich werden, die besonders hilfreich bei Verdacht auf Tumore dieser Drüse sind. Die präoperative Feinnadelpunktionszytologie kann bei Verdacht auf Vorliegen eines Malignoms nicht beweisend sein. Die vorliegende Untersuchung umfasst die Analyse der retrospektiv erhobenen Daten von 87 Patienten mit einer Erkrankung der Glandula submandibularis, die zwischen Januar 2001 und Dezember 2010 in der Hals-Nasen und Ohren-Klinik des UKGM Giessen und Marburg, Standort Marburg, transzervikal operiert wurden. Ziel dieser Arbeit ist es, das therapeutische Vorgehen bei der Exstirpation der Glandula submandibularis und die Komplikationen des intraoperativen sowie frühen postoperativen Verlaufs zu analysieren und im Spiegel der Literatur zu diskutieren. Als frühe postoperative Komplikationen wurden die Komplikationen, die während des stationären Aufenthaltes auftraten, berücksichtigt. Neben der Darstellung von Komplikationen galt ein besonderes Interesse der Beschreibung von Ätiologien, Symptomen und Befunden, der Diagnostik und Therapie der Erkrankungen der Glandula submandibularis. Die Ergebnisse dieser Arbeit sollen dazu beitragen, die Therapie gegebenenfalls zu optimieren und, soweit möglich, ein gutes ästhetisches und komplikationsarmes Ergebnis für den Patienten zu erreichen

Microbenthic Net Metabolism Along Intertidal Gradients (Cadiz Bay, SW Spain): Spatio-Temporal Patterns and Environmental Factors

Microphytobenthos (MPB), the photosynthetic primary producing component of microbenthos, shows variable patterns in its biomass distribution along the intertidal gradient as a result of the interactions of factors such as light, tides, temperature, and grazing pressure. These patterns have been studied more extensively in northern European estuaries than southern European coastal systems. Even less information is available regarding temporal changes in MPB primary production rates in these systems. For this reason, we followed the seasonal changes in net production in light and dark respiration rates (determined by oxygen microelectrodes) and MPB biomass (estimated by sediment chlorophyll a) along the intertidal gradient of the inner Cadiz Bay during a year. Sediment cores were collected along two transects (five sampling stations per transect) with distinct sediment granulometry: one muddy [Puerto Real (PR)] and one muddy-sandy transect [San Fernando (SF)]. Our results show that MPB biomass and net production increased seawards reaching their maxima in winter. In contrast to what is observed in northern European systems, the higher solar irradiance and temperatures occurring in summer in southern Spain likely inhibit MPB production. In Cadiz Bay, spatial patterns of MPB biomass and net production depended on season and location due to the environmental heterogeneity observed. Environmental variables, analyzed by principal component analysis (PCA), were used to explain the variability of MPB metabolism by multiple regression. Selected principal component (PC) axes explained 60% of the net production in light and 41% of the dark respiration rates variability in PR, while they only accounted for 25% of the same rates in SF. The differences observed between transects and the variability in the environmental variables explaining them highlight the importance of considering the spatial heterogeneity of our system to estimate the contribution of MPB to the inner Cadiz Bay productivity. In our case, this contribution is significant accounting for up to 49% of the total benthic production of the inner Cadiz Bay intertidal sediments, confirming previous global estimates