Tagesschule und Schulerfolg?

Die Nutzung der sekundären Sozialisationsinstanz Schule durch die Kinder – wie sie darin zurechtkommen, in welcher Weise sie von ihr profitieren – hängt vom sozialen, kulturellen und ökonomischen Kapital der Familie ab. Bourdieu (1983) spricht hier von Habitus. Der Einfluss der sozialen Herkunft auf die schulischen Leistungen konnte in vielen Untersuchungen nachgewiesen werden (z.B. Coradi Vellacott 2007). Bereits bei Kindergarten- und Schuleintritt unterscheiden sich die Kinder in sprachlichen und mathematischen Kompetenzbereichen, insbesondere weil sie in ihren Familien unterschiedliche Entwicklungsmöglichkeiten erfahren (Moser & Bayer, 2010). Schlechtere Startbedingungen durchziehen alle Lebensbereiche – in der Schule, im Wohnumfeld oder bei der Freizeitgestaltung an weiteren institutionellen Bildungsorten. Es stellt sich die Frage, ob es dem Bildungssystem gelingt, diese Unterschiede zu kompensieren. Verschiedene Studien zeigen, dass es der Schule nicht im erhofften Umfang gelingt, die primären Disparitäten zu kompensieren. Damit dies besser gelingen kann, müssen sich die Bildungsinstitutionen und die Familie zu Beginn des 21. Jahrhunderts an die veränderten gesellschaftlichen Rahmenbedingungen anpassen. Damit sie auch in der Zukunft ihrer Kernaufgabe – Kinder auf ihrem Weg des Erwachsenwerdens zu unterstützen – gerecht werden können. Der Tagesschule in der Schweiz werden in der erziehungswissenschaftlichen Literatur verbreitet pädagogische Möglichkeiten eingeräumt, die dargestellte Situation im Bildungssystem zu verbessern (Holtappels, 2006). Die Tagesschule soll ermöglichen, weg von einer reinen Unterrichtsschule hin zu einer Schule als Erfahrungs- und Lebensraum zu kommen. In einer solchen Schule sollen – nebst der Förderung von kognitiven Kompetenzen aller Schülerinnen und Schüler (Schulleistung) – eine individuelle Förderung, soziales Lernen sowie insbesondere eine Erhöhung der Chancengerechtigkeit im Bildungssystem im Fokus stehen (Herzog, 2009). Im Hinblick auf Letzteres erhofft man sich durch eine ganztägige Bildung und Betreuung eine kompensatorische Wirkung hinsichtlich sozialer Disparitäten. Ganztägige Bildung und Betreuung für Schulkinder kann in Form einer Tagesschule oder mit Blockzeitenunterricht und zusätzlichen Bildungs- und Betreuungsangeboten an oder ergänzend zur Schule realisiert werden. Unter einer Tagesschule versteht man heute in der Schweiz überwiegend eine schulische Institution mit einem den ganzen Tag abdeckenden Angebot. Sie setzt sich aus dem Unterricht und (Tagesschul-)Angeboten wie Mittagessen, Hausaufgabenbetreuung, freiem Spiel, geleiteten Sequenzen und Kursen u.a. zusammen. Teilweise verschmelzen die beiden Teile im Schultag (Schüpbach, 2010).

CAOR: Context-aware Adaptive Opportunistic Routing in Mobile Ad-hoc Networks

Opportunistic routing (OR) employs a list of candidates to improve wireless transmission reliability. However, conventional list-based OR restricts the freedom of opportunism, since only the listed nodes are allowed to compete for packet forwarding. Additionally, the list is generated statically based on a single network metric prior to data transmission, which is not appropriate for mobile ad-hoc networks (MANETs). In this paper, we propose a novel OR protocol - Context-aware Adaptive Opportunistic Routing (CAOR) for MANETs. CAOR abandons the idea of candidate list and it allows all qualified nodes to participate in packet transmission. CAOR forwards packets by simultaneously exploiting multiple cross-layer context information, such as link quality, geographic progress, energy, and mobility.With the help of the Analytic Hierarchy Process theory, CAOR adjusts the weights of context information based on their instantaneous values to adapt the protocol behavior at run-time. Moreover, CAOR uses an active suppression mechanism to reduce packet duplication. Simulation results show that CAOR can provide efficient routing in highly mobile environments. The adaptivity feature of CAOR is also validated.

REST-based sensor networks with OData

RESTful services gained a lot of attention recently, even in the enterprise world, which is traditionally more web-service centric. Data centric RESfFul services, as previously mainly known in web environments, established themselves as a second paradigm complementing functional WSDL-based SOA. In the Internet of Things, and in particular when talking about sensor motes, the Constraint Application Protocol (CoAP) is currently in the focus of both research and industry. In the enterprise world a protocol called OData (Open Data Protocol) is becoming the future RESTful data access standard. To integrate sensor motes seamlessly into enterprise networks, an embedded OData implementation on top of CoAP is desirable, not requiring an intermediary gateway device. In this paper we introduce and evaluate an embedded OData implementation. We evaluate the OData protocol in terms of performance and energy consumption, considering different data encodings, and compare it to a pure CoAP implementation. We were able to demonstrate that the additional resources needed for an OData/JSON implementation are reasonable when aiming for enterprise interoperability, where OData is suggested to solve both the semantic and technical interoperability problems we have today when connecting systems

TDOA for Narrow-band Signal with Low Sampling Rate and Imperfect Synchronization

Time-based localization techniques such as multilateration are favoured for positioning to wide-band signals. Applying the same techniques with narrow-band signals such as GSM is not so trivial. The process is challenged by the needs of synchronization accuracy and timestamp resolution both in the nanoseconds range. We propose approaches to deal with both challenges. On the one hand, we introduce a method to eliminate the negative effect of synchronization offset on time measurements. On the other hand, we propose timestamps with nanoseconds accuracy by using timing information from the signal processing chain. For a set of experiments, ranging from sub-urban to indoor environments, we show that our proposed approaches are able to improve the localization accuracy of TDOA approaches by several factors. We are even able to demonstrate errors as small as 10 meters for outdoor settings with narrow-band signals.

NextServe Framework: Supporting Services Over Content-Centric Networking

The future Internet architecture aims to reformulate the way the content/service is requested to make it location-independent. Information-Centric Networking is a new network paradigm, which tries to achieve this goal by making content objects identified and requested by name instead of address. In this paper, we extend Information-Centric Networking architecture to support services in order to be requested and invoked by names. We present NextServe framework, which is a service framework with a human-readable self-explanatory naming scheme. NextServe is inspired by the object-oriented programming paradigm and is applicable with real-world scenarios.

Effects of Motive-Oriented Therapeutic Relationship in a Ten-Session General Psychiatric Treatment of Borderline Personality Disorder: A Randomized Controlled Trial

Background: Motive-oriented therapeutic relationship (MOTR) was postulated to be a particularly helpful therapeutic ingredient in the early treatment phase of patients with personality disorders, in particular with borderline personality disorder (BPD). The present randomized controlled study using an add-on design is the first study to test this assumption in a 10-session general psychiatric treatment with patients presenting with BPD on symptom reduction and therapeutic alliance. Methods: A total of 85 patients were randomized. They were either allocated to a manual-based short variant of the general psychiatric management (GPM) treatment (in 10 sessions) or to the same treatment where MOTR was deliberately added to the treatment. Treatment attrition and integrity analyses yielded satisfactory results. Results: The results of the intent-to-treat analyses suggested a global efficacy of MOTR, in the sense of an additional reduction of general problems, i.e. symptoms, interpersonal and social problems (F 1, 73 = 7.25, p < 0.05). However, they also showed that MOTR did not yield an additional reduction of specific borderline symptoms. It was also shown that a stronger therapeutic alliance, as assessed by the therapist, developed in MOTR treatments compared to GPM (Z 55 = 0.99, p < 0.04). Conclusions: These results suggest that adding MOTR to psychiatric and psychotherapeutic treatments of BPD is promising. Moreover, the findings shed additional light on the perspective of shortening treatments for patients presenting with BPD.

Explaining Variations in Client Extra Costs between Software Projects Offshored to India

Gaining economic benefits from substantially lower labor costs has been reported as a major reason for offshoring labor-intensive information systems services to low-wage countries. However, if wage differences are so high, why is there such a high level of variation in the economic success between offshored IS projects? This study argues that offshore outsourcing involves a number of extra costs for the ^his paper was recommended for acceptance by Associate Guest Editor Erran Carmel. client organization that account for the economic failure of offshore projects. The objective is to disaggregate these extra costs into their constituent parts and to explain why they differ between offshored software projects. The focus is on software development and maintenance projects that are offshored to Indian vendors. A theoretical framework is developed a priori based on transaction cost economics (TCE) and the knowledge-based view of the firm, comple mented by factors that acknowledge the specific offshore context The framework is empirically explored using a multiple case study design including six offshored software projects in a large German financial service institution. The results of our analysis indicate that the client incurs post contractual extra costs for four types of activities: (1) re quirements specification and design, (2) knowledge transfer, (3) control, and (4) coordination. In projects that require a high level of client-specific knowledge about idiosyncratic business processes and software systems, these extra costs were found to be substantially higher than in projects where more general knowledge was needed. Notably, these costs most often arose independently from the threat of oppor tunistic behavior, challenging the predominant TCE logic of market failure. Rather, the client extra costs were parti cularly high in client-specific projects because the effort for managing the consequences of the knowledge asymmetries between client and vendor was particularly high in these projects. Prior experiences of the vendor with related client projects were found to reduce the level of extra costs but could not fully offset the increase in extra costs in highly client-specific projects. Moreover, cultural and geographic distance between client and vendor as well as personnel turnover were found to increase client extra costs. Slight evidence was found, however, that the cost-increasing impact of these factors was also leveraged in projects with a high level of required client-specific knowledge (moderator effect).

Der Einfluss kultureller Unterschiede beim IT-Offshoring

Dieser Beitrag zeigt auf der Basis von sechs Anwendungsentwicklung-sprojekten in Indien, welche kulturellen Einflussgrößen bei der Auslagerung von IT-Projekten einzubeziehen sind, wie diese Determinanten den Projekterfolg beeinflussen und durch welche Maßnahmen von Seiten des Managements kulturelle Herausforderungen zur Sicherung des Projekterfolgs gemeistert werden können: - Als kritische Kulturfaktoren haben sich Unterschiede in der Macht-distanz, dem Designverständnis und der aktiven versus passiven Arbeitseinstellung herauskristallisiert. - Diese Faktoren wirken direkt auf wichtige Stellgrößen der Beziehungs-qualität, wie dem Vertrauen, der Leistung des Anbieters, dem Grad der Kooperation und auftretenden Konflikten. Auf diese Weise wirken sie indirekt auf den Erfolg von Offshoring-Projekten. - Eine klare Definition von Rollen und Mechanismen, starke Mitarbeiterführung und ein aktives Kulturmanagement, das eine An- passung an die Kultur des Kunden oder an die des Anbieters beinhaltet, haben sich als effektive Managementmaßnahmen zur Bewältigung kultureller Herausforderungen herausgestellt

Herausforderungen und Chancen der Internationalisierung für mittelständische Softwareunternehmen in Deutschland

Die Internationalisierung ist für Softwareunternehmen im deutschen Mittelstand einerseits ein Muss, um den Anforderungen international ausgerichte-ter Kunden gerecht zu werden, anderseits eröffnet sie der Softwarebranche die Chance, aktiv neue Märkte zu erschließen. Anhand ausgewählter Beispiele deutscher Softwareunternehmen, die bereits international tätig sind, werden in die-ser Studie auf Basis von Experteninterviews Treiber, Strategien und Umsetzungs-ansätze der Internationalisierung vor dem Hintergrund der jeweiligen Eigenschaf-ten der Softwareprodukte dargestellt. Die Ergebnisse zeigen erste Zusammenhänge auf und bieten wichtige Ansatzpunkte für weitere Forschung im Bereich der Internationalisierung von Softwareunternehmen.

The Emergence of Partnership Networks in the Enterprise Application Development Industry - A Global Corporation Perspective

Currently, dramatic changes are happening in the IS development industry. The incumbent system developers (hubs) are embracing partnerships with less well established companies (spokes), acting in specific niches. This paper seeks to establish a better understanding of the motives for this strategy. Relying on existing work on strategic alliance formation, it is argued that partnering is particularly attractive, if these small companies possess certain capabilities that are difficult to obtain through other arrangements than partnering. Again drawing on the literature, three categories of capabilities are identified: the capability to innovate within their niche, the capability to provide a specific functionality that can be integrated with the incumbents’ systems, and the capability to address novel markets. These factors are analyzed through a case study. The case represents a market leader in the global IS development industry, which fosters a network of smaller partner firms. The study reveals that temporal dynamics between the identified factors are playing a dominant role in these networks. A cyclical partnership model is developed that attempts to explain the life cycle of a partnership within such a network.

An Architecture to offer Cloud-Based Radio Access Network as a Service

This paper addresses the novel notion of offering a radio access network as a service. Its components may be instantiated on general purpose platforms with pooled resources (both radio and hardware ones) dimensioned on-demand, elastically and following the pay-per-use principle. A novel architecture is proposed that supports this concept. The architecture's success is in its modularity, well-defined functional elements and clean separation between operational and control functions. By moving much processing traditionally located in hardware for computation in the cloud, it allows the optimisation of hardware utilization and reduction of deployment and operation costs. It enables operators to upgrade their network as well as quickly deploy and adapt resources to demand. Also, new players may easily enter the market, permitting a virtual network operator to provide connectivity to its users.

The use of unmanned aerial vehicles and wireless sensor networks for spraying pesticides

The application of pesticides and fertilizers in agricultural areas is of crucial importance for crop yields. The use of aircrafts is becoming increasingly common in carrying out this task mainly because of their speed and effectiveness in the spraying operation. However, some factors may reduce the yield, or even cause damage (e.g., crop areas not covered in the spraying process, overlapping spraying of crop areas, applying pesticides on the outer edge of the crop). Weather conditions, such as the intensity and direction of the wind while spraying, add further complexity to the problem of maintaining control. In this paper, we describe an architecture to address the problem of self-adjustment of the UAV routes when spraying chemicals in a crop field. We propose and evaluate an algorithm to adjust the UAV route to changes in wind intensity and direction. The algorithm to adapt the path runs in the UAV and its input is the feedback obtained from the wireless sensor network (WSN) deployed in the crop field. Moreover, we evaluate the impact of the number of communication messages between the UAV and the WSN. The results show that the use of the feedback information from the sensors to make adjustments to the routes could significantly reduce the waste of pesticides and fertilizers.