Large internal dipole moment in InGaN/GaN quantum dots

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 97, 063103 (2010) and may be found at https://doi.org/10.1063/1.3477952.Direct observation of large permanent dipole moments of excitonic complexes in InGaN/GaN quantum dots is reported. Characteristic traces of spectral diffusion, observed in cathodoluminescence of InGaN/GaN quantum dots, allow deducing the magnitude of the intrinsic dipole moment. Our experimental results are in good agreement with realistic calculations of quantum dot transition energies for position-dependent external electric fields.DFG, 43659573, SFB 787: Halbleiter - Nanophotonik: Materialien, Modelle, Bauelement

Single-photon emission from InGaAs quantum dots grown on (111) GaAs

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 96, 093112 (2010) and may be found at https://doi.org/10.1063/1.3337097.In this letter, we demonstrate that self-organized InGaAs quantum dots (QDs) grown on GaAs (111) substrate using droplet epitaxy have great potential for the generation of entangled photon pairs. The QDs show spectrally sharp luminescence lines and low spatial density. A second order correlation value of g(2)(0)<0.3 proves single-photon emission. By comparing the power dependence of the luminescence from a number of QDs we identify a typical luminescence fingerprint. In polarization dependent microphotoluminescence studies a fine-structure splitting ranging ≤40eV down to the determination limit of our setup (10eV) was observed.DFG, 43659573, SFB 787: Halbleiter - Nanophotonik: Materialien, Modelle, Bauelement

Lateral positioning of InGaAs quantum dots using a buried stressor

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 100, 093111 (2012) and may be found at https://doi.org/10.1063/1.3691251.We present a “bottom-up” approach for the lateral alignment of semiconductor quantum dots (QDs) based on strain-driven self-organization. A buried stressor formed by partial oxidation of (Al,Ga)As layers is employed in order to create a locally varying strain field at a GaAs(001) growth surface. During subsequent strained layer growth, local self-organization of (In,Ga)As QDs is controlled by the contour shape of the stressor. Large vertical separation of the QD growth plane from the buried stressor interface of 150 nm is achieved enabling high optical quality of QDs. Optical characterization confirms narrow QD emission lines without spectral diffusion.DFG, 43659573, SFB 787: Halbleiter - Nanophotonik: Materialien, Modelle, Bauelement

EPMA-World Congress 2015: Bonn, Germany. 3-5 September 2015

Table of contents A1 Predictive and prognostic biomarker panel for targeted application of radioembolisation improving individual outcomes in hepatocellular carcinoma Jella-Andrea Abraham, Olga Golubnitschaja A2 Integrated market access approach amplifying value of “Rx-CDx” Ildar Akhmetov A3 Disaster response: an opportunity to improve global healthcare Russell J. Andrews, Leonidas Quintana A4 USA PPPM: proscriptive, profligate, profiteering medicine-good for 1 % wealthy, not for 99 % unhealthy Russell J. Andrews A5 The role of IDO in a murine model of gingivitis: predictive and therapeutic potentials Babak Baban, Jun Yao Liu, Xu Qin, Tailing Wang, Mahmood S. Mozaffari A6 Specific diets for personalised treatment of diabetes type 2 Viktoriia V. Bati, Tamara V. Meleshko, Olga B. Levchuk, Nadiya V. Boyko A7 Towards personalized physiotherapeutic approach Joanna Bauer, Ewa Boerner, Halina Podbielska A8 Cells, animal, SHIME and in silico models for detection and verification of specific biomarkers of non-communicable chronic diseases Alojz Bomba, Viktor O. Petrov, Volodymyr G. Drobnych, Rostyslav V. Bubnov, Oksana M. Bykova, Nadiya V. Boyko A9 INTERACT-chronic care model: Self-treatment by patients with decision support e-Health solution Hans-Peter Brunner-La Rocca, Lutz Fleischhacker, Olga Golubnitschaja, Frank Heemskerk, Thomas Helms, Tiny Jaarsma, Judita Kinkorova, Jan Ramaekers, Peter Ruff, Ivana Schnur, Emilio Vanoli, Jose Verdu A10 PPPM in cardiovascular medicine in 2015 Hans-Peter Brunner-La Rocca A11 Magnetic resonance imaging of nanoparticles in mice, potential for theranostic and contrast media development – pilot results Rostyslav V. Bubnov, Sergiy A. Grabovetskyi, Olena M. Mykhalchenko, Natalia O. Tymoshok, Oleksandr B. Shcherbakov, Igor P. Semeniv, Mykola Y. Spivak A12 Ultrasound diagnosis for diabetic neuropathy - comparative study Rostyslav V. Bubnov, Tetyana V. Ostapenko A13 Ultrasound for stratification patients with diabetic foot ulcers for prevention and personalized treatment - pilot results Rostyslav V. Bubnov, Nazarii M. Kobyliak, Nadiya M. Zholobak, Mykola Ya. Spivak A14 Project ImaGenX – designing and executing a questionnaire on environment and lifestyle risk of breast cancer John Paul Cauchi A15 Genomics – a new structural brand of predictive, preventive and personalized medicine or the new driver as well? Dmitrii Cherepakhin, Marina Bakay, Artem Borovikov, Sergey Suchkov A16 Survey of questionnaires for evaluation of the quality of life in various medical fields Barbara Cieślik, Agnieszka Migasiewicz, Maria-Luiza Podbielska, Markus Pelleter, Agnieszka Giemza, Halina Podbielska A17 Personalized molecular treatment for muscular dystrophies Sebahattin Cirak A18 Secondary mutations in circulating tumour DNA for acquired drug resistance in patients with advanced ALK + NSCLC Marzia Del Re, Paola Bordi, Valentina Citi, Marta Palombi, Carmine Pinto, Marcello Tiseo, Romano Danesi A19 Recombinant species-specific FcεRI alpha proteins for diagnosis of IgE-mediated allergies in dogs, cats and horses Lukas Einhorn, Judit Fazekas, Martina Muhr, Alexandra Schoos, Lucia Panakova, Ina Herrmann, Krisztina Manzano-Szalai, Kumiko Oida, Edda Fiebiger, Josef Singer, Erika Jensen-Jarolim A20 Global methodology for developmental neurotoxicity testing in humans and animals early and chronically exposed to chemical contaminants Arpiné A. Elnar, Nadia Ouamara, Nadiya Boyko, Xavier Coumoul, Jean-Philippe Antignac, Bruno Le Bizec, Gauthier Eppe, Jenny Renaut, Torsten Bonn, Cédric Guignard, Margherita Ferrante, Maria Liusa Chiusano, Salvatore Cuzzocrea, Gerard O'Keeffe, John Cryan, Michelle Bisson, Amina Barakat, Ihsane Hmamouchi, Nasser Zawia, Anumantha Kanthasamy, Glen E. Kisby, Rui Alves, Oscar Villacañas Pérez, Kim Burgard, Peter Spencer, Norbert Bomba, Martin Haranta, Nina Zaitseva, Irina May, Stéphanie Grojean, Mathilde Body-Malapel, Florencia Harari, Raul Harari, Kristina Yeghiazaryan, Olga Golubnitschaja, Vittorio Calabrese, Christophe Nemos, Rachid Soulimani A21 Mental indicators at young people with attributes hypertension and pre-hypertension Maria E. Evsevyeva, Elena A. Mishenko, Zurida V. Kumukova, Evgeniy V. Chudnovsky, Tatyana A. Smirnova A22 On the approaches to the early diagnosis of stress-induced hypertension in young employees of State law enforcement agencies Maria E. Evsevyeva, Ludmila V. Ivanova, Michail V. Eremin, Maria V. Rostovtseva A23 Сentral aortic pressure and indexes of augmentation in young persons in view of risk factors Maria E. Evsevyeva, Michail V. Eremin, Vladimir I. Koshel, Oksana V. Sergeeva, Nadesgda M. Konovalova A24 Breast cancer prediction and prevention: Are reliable biomarkers in horizon? Shantanu Girotra, Olga Golubnitschaja A25 Flammer Syndrome and potential formation of pre-metastatic niches: A multi-centred study on phenotyping, patient stratification, prediction and potential prevention of aggressive breast cancer and metastatic disease Olga Golubnitschaja, Manuel Debald, Walther Kuhn, Kristina Yeghiazaryan, Rostyslav V. Bubnov, Vadym M. Goncharenko, Ulyana Lushchyk, Godfrey Grech, Katarzyna Konieczka A26 Innovative tools for prenatal diagnostics and monitoring: improving individual pregnancy outcomes and health-economy in EU Olga Golubnitschaja, Jan Jaap Erwich, Vincenzo Costigliola, Kristina Yeghiazaryan, Ulrich Gembruch A27 Immunohistochemical assessment of APUD cells in endometriosis Vadym M. Goncharenko, Vasyl O. Beniuk, Olga V. Kalenska, Rostyslav V. Bubnov A28 Updating personalized management algorithm of endometrial hyperplasia in pre-menopause women Vadym M. Goncharenko, Vasyl O. Beniuk, Rostyslav V. Bubnov, Olga Melnychuk A29 The personified treatment approach of polimorbid patients with periodontal inflammatory diseases Irina A. Gorbacheva, Lyudmila Y. Orekhova, Vadim V. Tachalov A30 Ukrainian experience in hybrid war – the challenge to update algorithms for personalized care and early prevention of different military injuries Olena I. Grechanyk, Rizvan Ya. Abdullaiev, Rostyslav V. Bubnov A31 Tear fluid biomarkers: a comparison of tear fluid sampling and storage protocols Suzanne Hagan, Eilidh Martin, Ian Pearce, Katherine Oliver A32 The correlation of dietary habits with gingival problems during menstruation Cenk Haytac, Fariz Salimov, Servin Yoksul, Anatoly A. Kunin, Natalia S. Moiseeva A33 Genomic medicine in a contemporary Spanish population of prostate cancer: our experience Bernardo Herrera-Imbroda, Sergio del Río-González, Maria Fernanda Lara, Antonia Angulo, Francisco Javier Machuca Santa-Cruz A34 Challenges, opportunities and collaborations for personalized medicine applicability in uro-oncological disease Bernardo Herrera-Imbroda, Sergio del Río-González, Maria Fernanda Lara A35 Metabolic hallmarks of cancer as targets for a personalized therapy John Ionescu A36 Influence of genetic polymorphism as a predictor of the development of periodontal disease in patients with gastric ulcer and 12 duodenal ulcer Alfiya Z. Isamulaeva, Anatoly A. Kunin, Shamil Sh. Magomedov, Aida I. Isamulaeva A37 Challenges in diabetic macular edema Tatjana Josifova A38 Overview of the EPMA strategies in laboratory medicine relevant for PPPM Marko Kapalla, Juraj Kubáň, Olga Golubnitschaja, Vincenzo Costigliola A39 EPMA initiative for effective organization of medical travel: European concepts and criteria Vincenzo Costigliola, Marko Kapalla, Juraj Kubáň, Olga Golubnitschaja A40 Design and innovation in e-textiles: implications for PPPM Anthony Kent, Tom Fisher, Tilak Dias A41 Biobank in Pilsen as a member of national node BBMRI_CZ Judita Kinkorová, Ondřej Topolčan A42 Big data in personalized medicine: hype and hope Matthias Kohl A43 The 3P approach as the platform of the European Dentistry Department (DPPPD) Anatoly A. Kunin, Natalia S. Moiseeva A44 The endometrium cytokine patterns for predictive diagnosis of proliferation severity and cancer prevention Andrii I. Kurchenko, Vasyl A. Beniuk, Vadym M. Goncharenko, Rostyslav V. Bubnov, Nadiya V. Boyko, Andriy M. Strokan A45 A monocyte-based in-vitro system for testing individual responses to the implanted material: future for personalized implant construction Julia Kzhyshkowska, Alexandru Gudima, Ksenia S. Stankevich, Victor D. Filimonov4, Harald Klüter, Evgeniya M. Mamontova, Sergei I. Tverdokhlebov A46 Prediction and prevention of adverse health effects by meteorological factors: Biomarker patterns and creation of a device for self-monitoring and integrated care Ulyana B. Lushchyk, Viktor V. Novytskyy, Igor P. Babii, Nadiya G. Lushchyk, Lyudmyla S. Riabets, Ivanna I. Legka A47 Targeting "disease signatures" towards personalized healthcare Mira Marcus-Kalish, Alexis Mitelpunkt, Tal Galili, Neta Shachar, Yoav Benjamini A48 Influence of the skin imperfection on the personal quality of life and possible tools for objective diagnosis Agnieszka Migasiewicz, Markus Pelleter, Joanna Bauer, Ewelina Dereń, Halina Podbielska A49 The new direction in caries prevention based on the ultrastructure of dental hard tissues and filling materials Natalia S. Moiseeva, Anatoly A. Kunin, Dmitry A. Kunin A50 The use of LED radiation in prevention of dental diseases Natalia S. Moiseeva, Yury A. Ippolitov, Dmitry A. Kunin, Alexei N. Morozov, Natalia V. Chirkova, Nakhid T. Aliev A51 Status of endothelial progenitor cells in diabetic nephropathy: predictive and preventive potentials Mahmood S. Mozaffari, Jun Yao Liu, Babak Baban A52 The status of glucocorticoid-induced leucine zipper protein in salivary gland in Sjögren’s syndrome: predictive and personalized treatment potentials Mahmood S. Mozaffari, Jun Yao Liu, Rafik Abdelsayed, Xing-Ming Shi, Babak Baban A53 Maximal aerobic capacity - important quality marker of health Jaroslav Novák, Milan Štork, Václav Zeman A54 The EMPOWER project: laboratory medicine and Horizon 2020 Wytze P. Oosterhuis, Elvar Theodorsson A55 Personality profile manifestations in patient’s attitude to oral care and adherence to doctor’s prescriptions Lyudmila Y. Orekhova, Tatyana V. Kudryavtseva, Elena R. Isaeva, Vadim V. Tachalov, Ekaterina S. Loboda A56 Results of an European survey on personalized medicine addressed to directions of laboratory medicine Mario Pazzagli, Francesca Malentacchi, Irene Mancini, Ivan Brandslund, Pieter Vermeersch, Matthias Schwab, Janja Marc, Ron H.N. van Schaik, Gerard Siest, Elvar Theodorsson, Chiara Di Resta A57 MCI or early dementia predictive speech based diagnosis techniques Matus Pleva, Jozef Juhar A58 Personalized speech based mobile application for eHealth Matus Pleva, Jozef Juhar A59 Circulating tumor cell-free DNA as the biomarker in the management of cancer patients Jiří Polívka jr., Filip Janků, Martin Pešta, Jan Doležal, Milena Králíčková, Jiří Polívka A60 Complex stroke care – educational programme in Stroke Centre University Hospital Plzen Jiří Polívka, Alena Lukešová, Nina Müllerová, Petr Ševčík, Vladimír Rohan A61 Sleep apnea and sleep fragmentation contribute to brain aging Kneginja Richter, Lence Miloseva, Günter Niklewski A62 Personalised approach for sleep disturbances in shift workers Kneginja Richter, Jens Acker, Guenter Niklewski A63 Medical travel and innovative PPPM clusters: new concept of integration Olga Safonicheva, Vincenzo Costigliola A64 Medical travel and women health Olga Safonicheva A65 Continuity of generations in the training of specialists in the field of reconstructive microsurgery Maxim Sautin, Janna Sinelnikova, Sergey Suchkov A66 Telemonitoring of stroke patients – empirical evidence of individual risk management results from an observational study in Germany Songül Secer, Stephan von Bandemer A67 Women’s increasing breast cancer risk with n-6 fatty acid intake explained by estrogen-fatty acid interactive effect on DNA damage: implications for gender-specific nutrition within personalized medicine Niva Shapira A68 Cytobacterioscopy of the gingival crevicular fluid as a method for preventive diagnosis of periodontal diseases Aleksandr Shcherbakov, Anatoly A. Kunin, Natalia S. Moiseeva A69 Use of specially treated composites in dentistry to avoid violations of aesthetics Bogdan R. Shumilovich, Zhanna Lipkind, Yulia Vorobieva, Dmitry A. Kunin, Anastasiia V. Sudareva A70 National eHealth system – platform for preventive, predictive and personalized diabetes care Ivica Smokovski, Tatjana Milenkovic A72 The common energy levels of Prof. Szent-Györgyi, the intrinsic chemistry of melanin, and the muscle physiopathology. Implications in the context of Preventive, Predictive, and Personalized Medicine Arturo Solís-Herrera, María del Carmen Arias-Esparza, Sergey Suchkov A73 Plurality and individuality of hepatocellular carcinoma: PPPM perspectives Krishna Chander Sridhar, Olga Golubnitschaja A74 Strategic aspects of higher medical education reforms to secure newer educational platforms for getting biopharma professionals matures Maria Studneva, Sihong Song, James Creeden, Мark Мandrik, Sergey Suchkov A75 Overview of the strategies and activities of the European Federation of Clinical Chemistry and Laboratory Medicine, (EFLM) Elvar Theodorsson, EFLM A76 New spectroscopic techniques for point of care label free diagnostics Syed A. M. Tofail A77 Tumor markers for personalized medicine and oncology - the role of Laboratory Medicine Ondřej Topolčan, Judita Kinkorová, Ondřej Fiala, Marie Karlíková, Šárka Svobodová, Radek Kučera, Radka Fuchsová, Vladislav Třeška, Václav Šimánek, Ladislav Pecen, Jan Šoupal, Štěpán Svačina2 A78 Modern medical terminology (MMT) as a driver of the global educational reforms Evgeniya Tretyak, Maria Studneva, Sergey Suchkov A79 Juvenile hypertension; the relevance of novel predictive, preventive and personalized assessment of its determinants Francesca M. Trovato, G. Fabio Martines, Daniela Brischetto, Daniela Catalano, Giuseppe Musumeci, Guglielmo M. Trovato A80 Proteomarkers Biotech George Th. Tsangaris, Athanasios K. Anagnostopoulos A81 Proteomics and mass spectrometry based non-invasive prenatal testing of fetal health and pregnancy complications George Th. Tsangaris, Athanasios K. Anagnostopoulos A82 Integrated Ecosystem for an Integrated Care model for Heart Failure (HF) patients including related comorbidities (ZENITH) José Verdú, German Gutiérrez, Jordi Rovira, Marta Martinez, Lutz Fleischhacker, Donna Green, Arthur Garson, Elena Tamburini, Stefano Cuomo, Juan Martinez-Leon, Teresa Abrisqueta, Hans-Peter Brunner-La Rocca, Tiny Jaarsma, Teresa Arredondo, Cecilia Vera, Giuseppe Fico, Olga Golubnitschaja, Fernando Arribas, Martina Onderco, Isabel Vara, on behalf of ZENITH consortium A83 Predictive, preventive and personalized medicine in diabetes onset and complication (MOSAIC project) José Verdú, Francesco Sambo, Barbara Di Camillo, Claudio Cobelli, Andrea Facchinetti, Giuseppe Fico, Riccardo Bellazzi, Lucia Sacchi, Arianna Dagliati, Daniele Segnani, Valentina Tibollo, Manuel Ottaviano, Rafael Gabriel, Leif Groop, Jacqueline Postma, Antonio Martinez, Liisa Hakaste, Tiinamaija Tuomi, Konstantia Zarkogianni, on behalf of MOSAIC consortium A84 Possibilities for personalized therapy of diabetes using in vitro screening of insulin and oral hypoglycemic agents Igor Volchek, Nina Pototskaya, Andrey Petrov A85 The innovative technology for personalized therapy of human diseases based on in vitro drug screening Igor Volchek, Nadezhda Pototskaya, Andrey Petrov A86 Bone destruction and temporomandibular joint: predictive markers, pathogenetic aspects and quality of life Ülle Voog-Oras, Oksana Jagur, Edvitar Leibur, Priit Niibo, Triin Jagomägi, Minh Son Nguyen, Chris Pruunsild, Dagmar Piikov, Mare Saag A87 Sub-optimal health management – global vision for concepts in medical travel Wei Wang A88 Sub-optimal health management: synergic PPPM-TCAM approach Wei Wang A89 Innovative technologies for minimal invasive diagnostics Andreas Weinhäusel, Walter Pulverer, Matthias Wielscher, Manuela Hofner, Christa Noehammer, Regina Soldo, Peter Hettegger, Istvan Gyurjan, Ronald Kulovics, Silvia Schönthaler, Gabriel Beikircher, Albert Kriegner, Stephan Pabinger, Klemens Vierlinger A90 Rare disease diobanks for personalized medicine Ayşe Yüzbaşıoğlu, Meral Özgüç, Member of EuroBioBank - European Network of DNA, Cell and Tissue Banks for Rare Disease

Einfluss von Defekten von Phononen und von Verspannung auf die Lumineszenzeigenschaften der nitrid- und arsenidbasierten Quantenpunkte

Diese Arbeit stellt die Ergebnisse der experimentellen Untersuchungen der Lumineszenzeigenschaften von Halbleiterquantenpunkten (QP) vor. Zwei wichtige Materialsysteme stehen im Mittelpunkt dieser Arbeit. Beide Systeme sind für die Entwicklung von Anwendungen im Bereich der Quantenkryptografie und Quantencomputer von großer Bedeutung: Nitrid-basierte QP sind wichtige Kandidaten für die Anwendbarkeit bei Raumtemperatur. Am Beispiel des Materialsystems InGaAs/GaAs wurde ein neuer Ansatz der Herstellung positionierter QP untersucht. Für die optische Charakterisierung wurde Kathodolumineszenzspektroskopie (KL) benutzt, da sie eine hohe Orts- und Spektralauflösung bietet. Um die experimentellen Beobachtungen einzuordnen, wurden verschiedene Modellrechnungen durchgeführt und deren Ergebnisse werden zum ersten Mal im Rahmen dieser Arbeit präsentiert. Dabei vermittelt die gesamte Analyse ein besseres Verständnis der untersuchten Prozesse. Stochastische Fluktuationen lokaler elektrischer Felder in der Umgebung von QP beeinflussen die Lumineszenzenergie, dieser Effekt ist als spektrale Diffusion (SD) bekannt. Die Auswirkungen der SD auf die Lumineszenz Nitrid-basierter QP wurden untersucht. Die vorliegende Arbeit liefert umfangreiche Ergebnisse und Diskussionen zu unterschiedlichen Typen von SD und führt deren möglichen Ursprung auf bestimmte Arten von Defekten zurück. Es wurde festgestellt, dass die großen Linienbreiten auch bei resonanter Anregung auftreten und für die Nitrid-basierten QP, die mittels heutigen Verfahren gewachsen werden, eine charakteristische Eigenschaft darstellen. Ein spezielles Muster im zeitlichen Verlauf der Lumineszenz einzelner QP wird zum ersten Mal beschrieben, ein Model als Erklärung für diese Änderung der Linienlage wird vorgestellt und durch Simulationsrechnungen verifiziert. Pyro- und piezoelektrische Felder in den Nitrid-basierten Heterostrukturen verursachen eine räumliche Trennung der Wellenfunktionen der Ladungsträger in den QP. Für die resultierenden Dipolmomente exzitonischer Komplexe in einzelnen QP wurde aus den Experimenten anhand der SD sowohl die Größe als auch das relative Verhältnis identifiziert. Die Wechselwirkungen zwischen Exzitonen, eingeschlossen in AlN/GaN QP, und elementaren Gitterschwingungen wurden untersucht. Temperaturabhängige Messungen und spezielle Modelrechnungen zeigen die verstärkte Kopplung an akustische Phononen. Eine detaillierte Analyse der Kopplungsmechanismen in Abhängigkeit von Größe und Form eines QPs wurde mit Hilfe des Independent Boson Modells durchgeführt. Diese Rechnungen benutzen realistische Wellenfunktionen aus 8-Band k · p Rechnungen in der Hartree-Fock Näherung als Eingangsparameter und berücksichtigen außerdem die durch die SD verursachte inhomogene Linienverbreiterung. Die Simulationsergebnisse zeigen eine sehr gute Übereinstimmung mit dem Experiment. KL Untersuchungen haben bestätigt, dass der Einsatz vergrabener Stressor-Strukturen unter einer QP-Schicht das Wachstum der QP steuern kann. Die Ergebnisse deuten darauf hin, dass sich die QP in starker Korrelation mit der Position des Stressors bilden. Die durch den Stressor erzeugte Verspannung im Material beeinflusst auch die optischen Eigenschaften der positionierten QP. So wurden ortsabhängige systematische Variationen der QP nachgewiesen, die sich in der Emissionsenergie, der SD und der Polarisation zeigen. Da die in dieser Arbeit untersuchte Methode des kontrollierten Wachstums von QP auch in anderen Materialsystemen anwendbar ist, erscheint dieses Verfahren ein bedeutender Schritt für die Entwicklung von Anwendungen, die auf einzelnen positionierten QP basieren, die bestimmte optische Eigenschaften aufweisen sollen.This work presents the results of experimental investigations of the luminescence properties of two important quantum dot (QD) material systems by means of cathodoluminescence (CL) spectroscopy. Nitride-based QDs are prospective for quantum-communication applications at elevated temperatures due to their large localization energies. Site-controlled InGaAs/GaAs QDs present an example of a novel “bottom-up” approach for deterministic QD alignment. This method, based on strain-modulation controlled QD nucleation, is generally applicable to lateral positioning of nanostructures. The experimental results are substantiated with numerical calculations, some of which are presented for the first time within the frame of this work. Different manifestations of the so-called spectral diffusion (SD) - the variation of the single QD luminescence under influence of stochastic fluctuations of electric fields in the QD environment - were investigated. The dependence of SD on various excitation conditions and sample fabrication methods was analyzed for nitride-based QDs. The origin of different components of SD is discussed in terms of different defect types. For the spectral jitter of QD emission lines, which can be resolved in the spectroscopic experiments, a model of a moving charge is proposed. The analysis of the spectral jitter of the QD emission lines allows to conclude about the QD excitonic dipole-moment, induced by piezo- and pyroelectric fields. It is shown, that a large emission linewidth appears to be intrinsic property of the nitride material system using current fabrication methods and is present even in case of resonant excitation of the QD. From the spectral jitter of the emission lines, stemming from the excitonic transitions of the same QD, the ratio of the built-in dipole moments of the respective excitonic complexes can be determined quantitatively. Built-in dipole moments of various excitonic complexes from the same dot are shown to differ significantly. A special type of spectral jitter, reported for the first time in this work, allows to estimate the absolute value of the excitonic built-in dipole moment without applying external electric field. Interaction of excitons and acoustic phonons is investigated in detail in a combined experimental and theoretical survey for the first time for GaN/AlN QDs, where the impact of vertical and lateral charge-carrier confinement on the coupling mechanisms is analyzed. The independent Boson model using realistic wave-functions from 8-band k · p theory accounts very well for the experimental observations of the shape and position of the phonon side-bands. The intensity ratio of the zero-phonon line and phonon side-band as obtained from the numerical results matches measured data only when SD-induced line broadening is superimposed. The importance of taking SD into account in case of nitride-based QDs is again emphasized and its major impact on the inhomogeneous line broadening is proven. The analysis of temperature dependence of the emission linewidth shows a major role of acoustic phonon scattering for broadening of the linewidth, while the contribution of optical phonons can be neglected here. Spatially-resolved CL showed itself as a very useful technique for the investigation of the first test-structures of positioned QD. The feasibility of the growth concept is proven on the example of InGaAs/GaAs QD material system. The unambiguous influence of the strain from the buried stressor structure on luminescence properties, such as spectral diffusion and ensemble polarization, is evidenced. CL experiments reveal the formation of different QD luminescence bands, which can be clearly distinguished spectrally and spatially in strong correlation with the stressor position. The possibility to control properties of QD and their formation by means of strain from a buried stressor structure, appears an important step on the way to tailoring single-QD-based devices with desirable properties

Traditional and Innovative Educational Technologies at the University through the E-Learning Prism

The article is dedicated to comprehension the process of technological education in relation to E-learning. The relevance of the study is determined by the situation connected with the COVID-19 coronavirus pandemic, which required various educational organizations complete transition to distance learning for an indefinite period. It is noted that various educational technologies have been gaining new implementations in the conditions of distance education. The trend towards the gradual rejection of traditional (explanatory and illustrative) teaching methods and the transition to innovative technologies that were being operated within the educational system over the past decades has undergone changes due to the widespread transition to distance learning. Traditional technology, which structure includes elements of interactivity and innovation, has proven its effectiveness in the circumstances of E-learning. The least effective ones, based on the authors’ university teaching experience were training and game technologies. The technology of developing training can be effective if a teacher meets a number of conditions, depends on methods, means, and others learning technologies. Project technology, heuristic learning, problem – based learning, case-study technology, and differentiated learning proved to be the most effective ones. It is noted that the effectiveness of technologies application in the process of distance learning largely depends on a’s teacher professionalism and creative approach. The conclusion is made about the dynamism of the educational technologies system, its dependence on the conditions of training and the rapid development of educational technologies in response to conditions changes

Ways of Increase of Intellectual Potential of a Higher Educational Establishment (HES) Пути повышения интеллектуального потенциала вуза

The goal of the article is to identify possible ways of increase of intellectual potential of a HES, to consider problems of poor digestion of knowledge by students of economic specialties, to show advantages of work in small groups in teaching subjects of the mathematic cycle. The object of the study are problems of “poor receipt” of knowledge by students of economic HESs. Active methods of teaching subjects of the mathematical cycle are considered as one of the ways to awake student’s interest in the subject, rouse its understanding and applying in further labour activity. Instruments of the study are economic and mathematical methods that allow quantitative analysis of the obtained results. Overcoming the problems of “loss” of knowledge results in the growth of its intellectual potential. Result of the study is justification of use of the methods of active teaching in the process of teaching subjects of the mathematical cycle, positive impact of work in small groups on digestion of knowledge, and revelation of main reasons of “loss” of knowledge by students.<br>Цель статьи определить возможные пути повышения интеллектуального потенциала ВУЗа, рассмотреть проблемы неусвоения знаний студентами экономических специальностей, показать преимущества использования работы в малых группах в преподавании дисциплин математического цикла. Объектом исследования статьи являются проблемы «недополучения» знаний студентами экономических ВУЗов. Активные методы обучения дисциплинам математического цикла рассматриваются, как один из способов заинтересовать студента преподаваемой наукой, вызвать её понимание и применяемость в дальнейшей трудовой деятельности. Инструментарий исследования – экономико-математические методы, позволяющие количественно проанализировать получаемые результаты. Преодоление проблем «потери» знаний ведёт к росту его интеллектуального потенциала. Результат исследования – обоснование использования методов активного обучения в процессе преподавания дисциплин математического цикла, положительного влияния на усвоение знаний работы в малых группах, выявление основных причин «потери» знаний студентами