Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 590 for “"PBS"”.
-
Computational Studies of PbS Quantum Dots
A third-generation photovoltaic technology, PbS quantum dot solar cells boast tunable, infrared-compatible bandgaps, air stability and scalable production. Their unfortunately limited photovoltaic efficiency, a result of low carrier lifetime, has been tentatively ascribed to polydispersity, fusing, …
-
The Stability of PbS Quantum Dot Solar Cells
Solution-based lead sulfide (PbS) quantum dots (QDs) may enable lightweight solar cells that facilitate high-throughput module manufacturing, simplify module installation, and bring light-harvesting functionality to unconventional or weight-restricted surfaces. Proven long-term stability is …
-
Charge transport in nanopatterned PbS colloidal quantum dot arrays
… charge transport in nanopatterned arrays of PbS colloidal quantum dots using conventional two-probe measurements and an integrated charge sensor. PbS dots are synthesized in solution with an organic ligand or cap that serves to passivate the surface of the dot, provide a tunnel barrier as …
-
A case study of the implementation of positive behavior supports (PBS)
<p>The purpose of this single case study was to examine the significant personal, social, and environmental elements influencing effective second-year implementation of a specific school reform initiative, Positive Behavior Supports, in one alternative high school in southwestern Michigan. Data …
-
Theoretical characterisation of spheroidal PbSe/PbS Core/Shell colloidal quantum dot heterostructures
… cell devices. IV-VI semiconductor nanocrystals (PbS, PbSe) are of particular interest as candidates for the exploitation of MEG due to the narrow band gap, high confinement energies, and long radiative carrier lifetimes observed in these systems. In order to realise the full potential of MEG …
-
Understanding electronic and optical properties of PbS QDs for improved photovoltaic performance
… (P.C.E.) of QD-PVs based on lead sulfide (PbS) have been enhanced dramatically in only several years: current leading groups are able to fabricate reliably QD-PVs with 7-10% P.C.E. owing to favorable optical properties of PbS QDs including facile tunability of bandgaps with the variation in …
-
Storytelling and Self in Public Broadcast: A Visual Ethnography of Rocky Mountain PBS
… theory, and phenomenology. Rocky Mountain PBS, a 60-year-old broadcast institution, served as my research site during the summer of 2018. In my thesis, I overviewed the history of RMPBS and observations of production activities performed by the creators of the show <em>Colorado …
-
Synthesis and characterisation of CdS and PbS nanoparticles in an imidazolium based ionic liquid
… were temperature dependent. In the synthesis of PbS nanoparticles, the effect of sulfur source (with the same lead source, lead acetate) was studied for dual source precursors with respect to temperature and lead ethyl xanthate complex was used as single source molecular precursor in the ionic …
-
Fracture resistance of calcium hydroxide-treated teeth filled with water- and PBS-mixed MTA
… or Ca- and Mg-free Phosphate Buffered Saline (PBS), to establish whether these materials strengthen the root, and if an initial CH dressing has any effect on the fracture strength.<b><br/></b><b><br/></b><b>Materials and methods</b>: One hundred and eighty freshly extracted human permanent …
-
Tahap kepuasan guru terhadap perlaksanaan pentaksiran berasaskan sekolah (PBS) bagi Mata Pelajaran Kemahiran Hidup Bersepadu
Pentaksiran Berasaskan Sekolah (PBS) merupakan satu transformasi sistem pendidikan di Malaysia yang berhasrat untuk melahirkan modal insan yang holistik serta seimbanag dari segi jasmani, emosi, rohani dan intelek selaras dengan Falsafah Pendidikan Kebangsaan. Kajian ini dijalankan untuk mengkaji …
-
The Moderating Role of PBS in the Relationship Between Positive Expectancies and Alcohol-Related Negative Consequences
… to explore how protective behavioral strategies (PBS) affect the strength of the associations between specific positive expectancies and alcohol-related negative consequences. Therefore, the goal of the present study was to investigate the moderating role of PBS in the relationship between the …
-
„Muna þarf eftir því að hvetja og styrkja börnin” : eigindleg rannsókn á innleiðingu PBS í reykvískum skólum
… Heildstæður stuðningur við jákvæða hegðun (PBS) og byggir á niðurstöðum eigindlegrar rannsóknar sem unnin var á tímabilinu febrúar til apríl 2008. Megintilgangur rannsóknarinnar var að athuga hvert mat skólastjórnenda er á innleiðingu kerfisins. Þátttakendur rannsóknarinnar voru skólastjórar …
-
Seguridad marítima y cooperación internacional en la lucha contra el tráfico ilícito de drogas. Caso de estudio: Colombia, Potencia Bioceánica Sostenible (PBS)
… como una Potencia Bioceánica Sostenible (PBS), un Estado-Nación capaz de ejercer soberanía en sus espacios marítimos, aprovechar su posición geopolítica, ecosistemas marinos y biodiversidad, y realizar actividades marítimas sostenibles y competitivas en sus dos océanos y líneas marítimas. …
-
Influence of Parenting Styles and Protective Behavioral Strategies on College Students' Alcohol Use and Alcohol-Related Consequences
… styles, protective behavioral strategies (PBS), alcohol use and negative alcohol-related consequences in college students. While parenting styles have been associated with alcohol use, there are no studies which have investigated the relationship between parenting styles and negative …
-
A hermeneutic phenomenological exploration of nurses' experience: positive behaviour support
… in relation to Positive Behaviour Support (PBS) in a mental health organisation. PBS has developed into an important, effective, and useful framework in delivering care for individuals with learning disability and mental health issues. Its use started in specialist schools, but it has …
-
Effects of fluoride varnish application and phosphate buffered saline solution with or without demineralizing conditions prior to bracket bonding on subsequent enamel-bracket shear bond strength
… varnish (V) and phosphate buffered saline (PBS) solution with or without demineralization (DM) prior to bracket bonding on subsequent enamel-bracket shear bond strength (SBS). Sixty maxillary third molars were used for the testing procedures after the roots were embedded in acrylic resin. …
-
Posttraumatic Stress and Hazardous Alcohol Use in College Students: The Moderating Role of Alcohol Protective Behavioral Strategies
… protective behavioral strategy subtypes (Al-PBS; Serious Harm Reduction [SHR], Manner of Drinking [MOD], Stopping/Limiting Drinking [SLD]) and gender on the relationships between traumatic stress symptoms and both hazardous drinking and alcohol-related negative consequences. Participants were …
-
Comparing the Professional Practices of Teachers Working in a Positive Behavior Support High School with Practices of Teachers in a Traditional High School
… of teachers in both a Positive Behavior Support (PBS) high school and a traditional high school using Charlotte Danielson's (1996) 22 components of teaching responsibility that are clustered into four domains: Domain 1: Planning and Preparation, Domain 2: Classroom Environment, Domain 3: …
Page 1 of 30