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Background Features of schools and classes are closely related to students´ health and wellbeing. However, class composition (e.g. in terms of school performance) has rarely been examined in relation to students´ health and wellbeing. This study focuses on the so called Big-Fish-Little-Pond-Effect (BFLPE), by investigating whether the level of high-performing students in classroom is negatively associated with psychosomatic complaints of students who perceive themselves as poor performers....
Many pathogenic bacteria produce virulence factors that act as pore-forming toxins (PFTs) on the cytoplasmic membrane of target hosts. PFTs can be distinguished in binary (AB) toxins that actively transport a toxic counterpart into the cell and in conventional PFTs, which perforate the host membrane and translocate ions. Upon membrane interaction, the PFTs provoke different effects such as abolishing the transmembrane potential, altering signal pathways or disruption of the cell cytoskeletal....
Fast 10 Jahre nach Veröffentlichung des Nationalen Entwicklungsplan Elektromobilität liegt der Bestand an batterieelektrischen Elektrofahrzeugen und Plug-In Hybriden bei ca. 100.000 und damit bei 10 % des Ziels der Bundesregierung für das Jahr 2020. Der gewerbliche Verkehrssektor mit insgesamt ca. 6 Mio. Fahrzeugen an Pkw und leichten Nutzfahrzeugen verfügt über Voraussetzungen ein Eintrittssegment darzustellen und die Marktintegration stärker voranzutreiben, und begründet dadurch den Fokus d...
Krebs kommt aufgrund der stetig steigenden Anzahl an Neuerkrankungen und Todesfällen eine immer größer werdende Bedeutung in der Gesellschaft zu.1 In jüngerer Vergangenheit wurde die therapeutische Behandlung dieser Erkrankung durch den vielversprechenden Ansatz der sogenannten Präzisionsmedizin revolutioniert. Die Onkologie erlebt einen Wandel vom Einsatz klassischer unspezifischer Zytostatika hin zu einer Biomarker-adaptierten, zielgerichteten Adressierung onkogener Zielstrukturen.3 Die Pro...
A new series of [Pd2(L)4] cages based on photochromic dithienylethene (DTE) ligands allowed us to gain insight into the successive photoswitching of multiple DTE moieties in a confined metallo‐supramolecular assembly. Three new X‐ray structures of [Pd2(o‐L4)4], [Pd2(o‐L1)2(c‐L1)2] and [Pd2(c‐L1)4] (o‐L and c‐L = open and closed forms of DTE ligands, respectively) were obtained. The structures deliver snapshots of three different combinations of DTE photoisomeric states within the cage, facili...
Land evaluation is the primary content in the land-use planning process. There were many land evaluation methods which have been improved based on the FAO framework, but most of them have not been effectively assessed. The requirements of land characteristics and physical conditions supply a common view of land use types for land suitability. It is difficult in precise decision making for agricultural planning. Decision makers have to optimize productive agriculture and promote farmers’ socio...
Chiral nanosized confinements play a major role for enantioselective recognition and reaction control in biological systems. Supramolecular self‐assembly gives access to artificial mimics with tunable sizes and properties. Herein, a new family of [Pd2L4] coordination cages based on a chiral [6]helicene backbone is introduced. A racemic mixture of the bis‐monodentate pyridyl ligand L1 selectively assembles with PdII cations under chiral self‐discrimination to an achiral meso cage, cis‐[Pd2L1P2...
This thesis focuses on fourth-order spin correlation functions in semi-conductor quantum dots. Widely studied are the second order spin noise power spectrum and its counterpart in the time domain. However, the information extracted from the second order correlation function is limited, and it stands to reason that higher order correlators carry additional physics. The best and most accessible option to study higher order statistics are fourth order correlators. These can be observe...
Unternehmen sind permanent an Wachstum und neuen Kunden interessiert. Weitere Absatzmöglichkeiten zu erschließen ist neben technologischer Entwicklung die allgegenwärtige Herausforderung der Unternehmensführung. Dabei ist es bereits schwer genug, Unternehmen nachhaltig zu führen und am Markt zu bestehen. Einerseits müssen produzierende Unternehmen ihre Produkte zunehmend unter harten, internationalen Wettbewerbsbedingungen herstellen und immer öfter gegen Waren aus so genannten Billiglohnländ...
Die Nutzung von Apps setzt auf Seiten der Nutzer*innen Vertrauen in die Datensicherheit und Nützlichkeit der App voraus. Da Apps einer zunehmenden Nutzung unterliegen und darüber hinaus ein mögliches Instrument zur Echtzeitsteuerung komplexer Systeme darstellen können, besteht sowohl aus Sicht der Soziologie als auch aus einer Governance-Perspektive ein Interesse an Erkenntnisgewinn hinsichtlich der Mensch-App-Interaktion. In diesem Arbeitspapier wird besagte Interaktion daher modelliert un...
The self-concept of ability in math in elementary school is an early predictor for future math-related choices and careers. Unfortunately, already at this early age girls report lower ability self-concepts in math than boys—despite their comparable performances in objective math competence tests. In the present study we focus on teachers' beliefs as factors explaining these gender differences. Women's underrepresentation in math and science in academia has recently been explained by the belie...
Disc springs are conical annular discs, which are characterized by a high spring force with a small spring travel and good space utilization. In operation, they must meet high demands on the stability of the spring characteristic and the fatigue strength. Under loading, tensile stresses occur which limit the possible applications of disc springs. Compressive stresses can be generated in the stressed areas by means of shot-peening in order to extend the operating limits for a given yield and f...
Ho Chi Minh City (HCMC), economic center and most populous city of Vietnam faces a strong structural change since its market liberalization in the late 1980s. Big challenges occur in the form of uncontrolled urban sprawl due to rapid population growth with encroachment of agricultural land, which leads to environmental and climatic issues like urban heat island effects, air pollution and flooding events. Remote Sensing and Geographic Information Systems (GIS) provide new computer-based techno...