30 research outputs found
Transferring Social Capital Across Knowledge Domains: The Case of Nanoscience and Nanotechnology
No full textNew ‘networked’ modes of innovation increasingly emphasize the need for organizations to rely on external relationships in R&D and bring in knowledge and competences from domains outside the commercial realm. This has created opportunities for individual knowledge workers to function as critical conduits of knowledge and resources across domains of knowledge that are institutionally distant but interdependent - as the science and technology - for the knowledge creation process. The present paper explores how individual researchers accumulate and transfer social capital across these domains to generate novel knowhow. We specifically focus the attention on the structural dimension of social capital. Our empirical analysis is based on a 20-year longitudinal sample of authors, inventors, and author-inventors involved in the emerging field of nanoscience and nanotechnology
"All is Good, All is One". Rabi Nachman ben Simcha o-Bratslav. His Personality and his Work.
No full text"Vše je dobré, vše je Jedno" Rabi Nachman ben Simcha mi-Braslav Osobnost a dílo "Al lis Good, All is One" Rabi Nachman Ben Simcha of-Bratslav His Personality and his Work Mgr. Tereza Krekulová My thesis deals whith one of the most fascinating and at the same time controversial figures of Hasidic movement rabbi Nahman of Bratslav whose place in the framework of Hasidic spirituality was quite unique. It purpots to depict the features of his mentality and spiritual life which had the strongest influence on his teachings and his self-reflection as the hidden tzaddik of the whole generation with strong messianic aspiration. Both of his works differ very much from the traditional genres of Hasidic literature: his homilies are marked by their enigmatic, associative style and highly complex hermeneutical structure. His stories, unlike traditional Hasidic legend which depicts the life and miraculous deeds of tzaddikim, don't take place in the Jewish surroundings and tzaddik is present in them as their author who puts his words into the mouth of fictitions heroes. My aim was to prove the essential unity of both these works which played the crucial role na Nahman's messianic strivings. The most important conclusion is that the main purpose of both his teachings and stories which he used as material garments (levushim)..."Vše je dobré, vše je Jedno" Rabi Nachman ben Simcha mi-Braslav Mgr. Tereza Krekulová Rabi Nachman ben Simcha z Braslavi (1772 Mezibož - 1810 Uman) patří k nejoriginálnějším a zároveň i nejrozporuplnějším osobnostem chasidského hnutí. Jeho jedinečnost v rámci chasidské spirituality netkví pouze v myšlenkovém obsahu jeho subjektivně, niterně psychologicky zabarveného díla s hlubokým existenciálním přesahem; svébytný byl i jeho způsob komunikace s žáky a především vnímání sebe sama jako skrytě působícího cadika generace (cadik ha-dor) se silnou mesiášskou aspirací. Obě jeho díla se zásadně liší od tradičních žánrů chasidské literatury: homilie se vyznačují nesmírně složitou kompozicí a mnohovrstevnou hermeneutickou strukturou, příběhy na rozdíl od tradiční chasidské legendy vyprávějíci o životě a zázračných skutcích cadikim, nejsou primárně spjaty s židovským prostředím a tradicí a cadik je v nich přítomen jako sám autor promlouvající ke svým posluchačům a čtenářům ústy fiktivních hrdinů. Jak homilie, tak příběhy, sloužily jako materiální roucha nejhlubšího mystického poznání, jehož skryté zjevování rabi Nachman - v návaznosti na Šim'ona ben Jochaj - pokládal za jeden z hlavních způsobů, jimž cadik ha-dor naplňuje svoji ústřední roli v díle individuální i univerzální spásy. Svým učením i příběhy rabi Nachman...HTF - Ústav židovských studiíHussite Theological FacultyHusitská teologická fakult
"All is Good, All is One". Rabi Nachman ben Simcha o-Bratslav. His Personality and his Work.
No full text"Vše je dobré, vše je Jedno" Rabi Nachman ben Simcha mi-Braslav Osobnost a dílo "Al lis Good, All is One" Rabi Nachman Ben Simcha of-Bratslav His Personality and his Work Mgr. Tereza Krekulová My thesis deals whith one of the most fascinating and at the same time controversial figures of Hasidic movement rabbi Nahman of Bratslav whose place in the framework of Hasidic spirituality was quite unique. It purpots to depict the features of his mentality and spiritual life which had the strongest influence on his teachings and his self-reflection as the hidden tzaddik of the whole generation with strong messianic aspiration. Both of his works differ very much from the traditional genres of Hasidic literature: his homilies are marked by their enigmatic, associative style and highly complex hermeneutical structure. His stories, unlike traditional Hasidic legend which depicts the life and miraculous deeds of tzaddikim, don't take place in the Jewish surroundings and tzaddik is present in them as their author who puts his words into the mouth of fictitions heroes. My aim was to prove the essential unity of both these works which played the crucial role na Nahman's messianic strivings. The most important conclusion is that the main purpose of both his teachings and stories which he used as material garments (levushim)..
High-Fidelity Cyber and Physical Simulation of Water Distribution Systems. I: Models and Data
No full textNumerical simulation models are a fundamental tool for planning and managing smart water networks-an evolution of water distribution systems in which physical assets are monitored and controlled by information and communication technologies. While simulation models allow us to understand the interactions between physical processes and abstract control strategies, they ignore key implementation aspects of distributed control systems, such as the required communication over digital links. As a result, the effects of anomalies and faults in the communication on the process control cannot be investigated with existing tools. In this work, we fill this gap by introducing DHALSIM (Digital HydrAuLic SIMulator), a numerical modelling platform combining EPANET-based process simulation with a network and host emulation environment, offering a high-fidelity representation of the processes occurring in the cyber domain. We illustrate DHALSIM's key functionalities by implementing it on a benchmark water distribution system, present case studies of simulated network traffic, and demonstrate how anomalies in the behavior of the communication network affect the process data received by the supervisory control and data acquisition (SCADA) server. In a companion paper, we further illustrate how DHALSIM enables research opportunities in the domain of cyber-physical security. The easily customizable and open source DHALSIM provides a "workbench" for studying smart water networks, developing digital twins, and designing a broad spectrum of engineering solutions
Aptamer−DNAzyme Hairpins for Amplified Biosensing
No full textEngineered nucleic acid hairpin structures are used for the amplified analysis of low-molecular-weight substrates (adenosine monophosphate, AMP) or proteins (lysozyme). The hairpin structures consist of the anti-AMP or antilysozyme aptamer units linked to the horseradish peroxidase (HRP)-mimicking DNAzyme sequence. The HRP-mimicking DNAzyme sequence is protected in a “caged”, inactive structure in the stem regions of the respective hairpins, whereas the loop regions include a part of the respective aptamer sequence. The opening of the hairpins by the analytes, AMP or lysozyme, through the formation of the respective analyte−aptamer complexes, results in the self-assembly of the active HRP-mimicking DNAzyme. The DNAzyme catalyzes the H2O2-mediated oxidation of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS2−) to the colored ABTS•−, thus providing the amplified optical detection of the respective analytes. The engineered aptamer−DNAzyme hairpin structures reveal significantly improved analytical performance, as compared to analogous fluorophore−quencher-labeled hairpins
Amplified Detection of DNA through the Enzyme-Free Autonomous Assembly of Hemin/G-Quadruplex DNAzyme Nanowires
No full textAPI evolution on Maven Central: do developers adhere to semantic versioning?
No full textIn this paper, we investigate whether developers of artifacts on Maven Central adhere to semantic versioning. We also investigate whether there is a link between violations in semantic versioning and the popularity of the violating method. Developers can violate semantic versioning by removing or altering methods in their API, which we refer to as breaking changes. They can also violate semantic versioning by extending the API in a patch version, referred to as an illegal API extension. APIs that do not keep their promise of adhering to semantic versioning, will unexpectedly break their dependents during upgrading of dependencies. We have found that these two types of violations do occur in practice. We find that 24% of analyzed artifacts contain breaking changes and 24% of artifacts contain illegal API extensions. Finally, we show that popularity of a method does not have an impact on breaking changes. We conclude that semantic versioning can not always guarantee that upgrading dependencies will not lead to incompatibility. This indicates a need for developers to be more aware of the impact that violating semantic versioning has.CSE3000 Research ProjectComputer Science and Engineerin
On the relation of method popularity to breaking changes in the Maven ecosystem
No full textSoftware reuse is a common practice in modern software engineering to save time and energy while accelerating software delivery. Dependency managers like MAVEN offer a large ecosystem of reusable libraries that build the backbone of software reuse. Breaking changes, i.e., when an update to a library introduces incompatible changes that break existing client programs, are troublesome barriers to this library reuse. Semantic Versioning has been proposed as a practice to make it easier for the users to find safe updates by encoding the change impact in the version number. While this practice is widely studied from the framework perspective, no detailed insights exist yet into the ecosystem perspective. In this work, we study violations of semantic versioning in the MAVEN ecosystem for 13,876 versions of 384 artifacts to better understand the impact these violations have on the 7,190 dependent versioned packages. We found that 67% of the artifacts introduce at least one type of semantic versioning violation, either a breaking change or an illegal API extension in their history. An impact analysis on breaking methods that (direct or transitive) dependents reference, revealed strong centralization: 87% of publicly accessible methods are never used by dependents and among methods with at least one usage, half of the unique calls from dependents concentrate on only 35% of the defined methods. We also studied method popularity and could not find an indication that popularity affects stability: even popular methods break frequently. Overall, we confirm the previous result that Semantic Versioning is violated repeatedly in practice. Our results suggest that the frequency of breaking changes might be a sign of insufficient change-impact awareness on the ecosystem and we believe that developers require more adequate information, like method popularity, to improve their update strategies.</p
