Sökning: "negative number"

Visar resultat 1 - 5 av 1187 avhandlingar innehållade orden negative number.

1. 1. Making Sense of Negative Numbers

   Författare :Cecilia Kilhamn; Göteborgs universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; mathematics education; metaphor; signed number; negative number; number sense; case study; longitudinal; social constructivism;

   Sammanfattning : Numbers are abstract objects that we conceptualize and make sense of through metaphors. When negative numbers appear in school mathematics, some properties of number sense related to natural numbers become contradictory. The metaphors seem to break down, making a transition from intuitive to formal mathematics necessary. LÄS MER

3. 2. Auf dem Weg zum Begriff der negativen Zahl : Empirische Studie zur Ordnungsrelation für ganze Zahlen aus inferentieller Perspektive

   Författare :Maike Schindler; Stephan Hußmann; Deutschland Dortmund Technische Universität; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Negative Numbers; Inferentialism; Individual Concepts; Concept Development; Order Relation; Mathematics; Matematik; Education; Pedagogik;

   Sammanfattning : Grundmuster von Begriffsbildungsprozessen von Schülerinnen und Schülern einer Beschreibung und Analyse zugänglich zu machen, ist ein höchst interessanter und relevanter Bereich der Mathematikdidaktik. Die Autorin widmet sich dieser Thematik, indem sie einen durch philosophische und psychologische Einflüsse geprägten Theorierahmen nutzt, um individuelle Begriffsbildungsprozesse in ihrem Wechselspiel mit Lernsituationen zu verstehen. LÄS MER

4. 3. Negative effects of Internet-based cognitive behavior therapy : Monitoring and reporting deterioration and adverse and unwanted events

   Författare :Alexander Rozental; Per Carlbring; Gerhard Andersson; Johanna Boettcher; Adam Radomsky; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Negative effects; Internet-based cognitive behavior therapy; deterioration; non-response; adverse and unwanted events; qualitative content analysis; individual patient data meta-analysis; exploratory factor analysis; Negative Effects Questionnaire; Negativa effekter; Internetbaserad kognitiv beteendeterapi; försämring; oförändrat tillstånd; ogynnsamma eller oönskade händelser; kvalitativ innehållsanalys; individuell patient meta-analys; explorativ faktoranalys; Negative Effects Questionnaire; Psychology; psykologi;

   Sammanfattning : Internet-based cognitive behavior therapy (ICBT) has the potential of providing many patients with an effective form of psychological treatment. However, despite helping to improve mental health and well-being, far from everyone seem to benefit. In some cases, negative effects may also emerge. LÄS MER

5. 4. Advancements in Lithium-Based Batteries : Unraveling and Mitigating Performance-Limiting Phenomena in Negative Electrodes

   Författare :Yu-Kai Huang; Leif Nyholm; William Brant; Erik Lewin; Gunther Brunklaus; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lithium-based batteries; negative electrodes; negative electrode materials; lithium diffusion; lithium trapping; lithium electrodeposition; Kemi med inriktning mot materialkemi; Chemistry with specialization in Materials Chemistry;

   Sammanfattning : The development of lithium-based batteries, especially lithium-ion batteries, has changed our daily lives significantly. The technologies first enabled by lithium-based batteries are now in turn creating a demand for better lithium-based batteries with higher energy densities and longer cycling lifetimes. LÄS MER

7. 5. Negative Ions Interacting with Photons and Electrons

   Författare :Anton Lindahl; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Negative ions; electron correlation; electron affinity; photodetachment; electron collision;

   Sammanfattning : Negative ions are atoms or molecules where an extra electron is bound to neutral system. The nature of negative ions differs fundamentally from neutral and positive systems. The induced dipole potential responsible for the binding of the extra electron supports only a few bound states with relatively small binding energies. LÄS MER