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Predatory publications in Scopus: evidence on cross-country differences
Macháček, Vít; Srholec, Martin
2019 - anglický
The paper maps the infiltration of so-called “predatory” scholarly journals into the citation database Scopus. Using the names of “potential, possible, or probable” predatory journals and publishers on Beall’s lists, we derived ISSNs of the respective journals from Ulrichsweb and searched Scopus with it. A total of 324 matched journals with 164 thousand documents indexed in Scopus over 2015-2017, making up a share of 2.8 % of the total articles have been identified. An analysis of cross-country differences in the tendency to publish in these journals reveals that overall the most affected are middle-income countries in Asia and North Africa. Kazakhstan is the country with the largest tendency to publish in predatory journals (18 %). More than 5 % is reported in 20 countries, including large countries such as Indonesia (18 %), Malaysia (11 %), India (10 %), or Nigeria (7 %). Neither developed countries are resistant to predatory publishing. More than 16 000 “potentially predatory” articles were published by authors from United States (0.67 %).
Klíčová slova:
predatory journals; Beall's list; open access
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Predatory publications in Scopus: evidence on cross-country differences
The paper maps the infiltration of so-called “predatory” scholarly journals into the citation database Scopus. Using the names of “potential, possible, or probable” predatory journals and publishers ...
Report on the reference densities of water and air employed for the adjustment of vibrating tube density meter
Vinš, Václav; Prokopová, Olga
2019 - anglický
Zpráva představuje souhrn několika modelů pro určení referenčních hustot čisté vody a vlhkého vzduchu při atmosférickém tlaku, které jsou potřebné k teplotní kalibraci hustoměru s vibrační trubicí Anton Paar DMA 5000 M. Při nastavení přístroje využívaného v Laboratoři termofyzikálních vlastností vzešla řada technických otázek ohledně kalibrace přístroje. Tato zpráva slouží zejména jako podklad k diskuzi se zástupci společnosti Anton Paar. S použitím softwaru pro technické výpočty Matlab byly vytvořeny programy pro výpočet hustoty vody pomocí stavové rovnice IAPWS-95 od Wagnera a Pruße (2002), CIPM standardu od Tanaky a kol. (2001) a vztahu od Spiewecka a Bettina (1992). Pro vlhký vzduch byl sestaven model na základě IAPWS Guideline G8-10 (2010) založeném na stavové rovnici pro suchý vzduch od Lemmona a kol. (2000) a stavové rovnici pro vodu IAPWS-95. Výsledky byly porovnány s CIPM standardem od Picarda a kol. (2008) a zjednodušeným vztahem od Spiewecka a Bettina (1992). V závěrečné části jsou prezentována data naměřená v Laboratoři termofyzikálních vlastností pro čistou vodu v teplotním rozsahu 2 až 50 °C pro různá nastavení referenčních vztahů pro hustoty vody a vlhkého vzduchu použité při kalibraci přístroje.\n
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Report on the reference densities of water and air employed for the adjustment of vibrating tube density meter
Zpráva představuje souhrn několika modelů pro určení referenčních hustot čisté vody a vlhkého vzduchu při atmosférickém tlaku, které jsou potřebné k teplotní kalibraci hustoměru s vibrační trubicí ...
Heterogeneity of returns to business R&D: what does make a difference?
Pleticha, Petr
2019 - anglický
Klíčová slova:
R&D returns; spillovers; Czechia
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Heterogeneity of returns to business R&D: what does make a difference?
Technical manual - collimator
Kredba, Jan; Steiger, Lukáš; Tomka, David; Václavík, Jan
2018 - anglický
The purpose of this document is to provide basic set of rules and instructions that allows using and maintaining of the NEOSTED collimator (COL).\nBe aware that it is not purpose of this document to provide detailed description of individual parts of the COL system. If necessary all the details and proper references can be found in [AD-2].
Klíčová slova:
collimator; NEOSTED; TOPTEC; optical testing; interferometry
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Technical manual - collimator
The purpose of this document is to provide basic set of rules and instructions that allows using and maintaining of the NEOSTED collimator (COL).\nBe aware that it is not purpose of this document to ...
Structural mapping of exploration boreholes walls within first phase - Safety boreholes for Boxcut
Waclawik, Petr; Souček, Kamil; Vavro, Martin; Kukutsch, Radovan; Ram, S.
2018 - anglický
Structural-geological analysis, i.e. core fracturing assessment within the boxcut safety\nborehole was carried out on the basis of optical televiewer record evaluation. In general,\noptical televiewer (OPTV) probe provides a continuous, unwrapped, high-resolution digital\n360° image of the borehole-walls oriented towards the cardinal points. This technique\nprovides information about the strike, dip direction, dip angle and depth of foliation, bedding\nplanes and fractures, as well as the frequency, aperture and infillings of fractures. Information\nabout spatial characteristics of structural elements is one of its indisputable advantages and\nallows for subsequent statistical evaluations.\nThe structural mapping of boreholes of Boxcut safety boreholes were carried out within the\ncontract of IG CAS (Contract No. D/18/156/00) GEOMET, s.r.o. (as a customer, contract No.\n01/2018). The aim of the contractual research was the realisation and interpretation of the\nfractures by digital logging of boreholes walls.
Klíčová slova:
boreholes; structural mapping; rock quality
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Structural mapping of exploration boreholes walls within first phase - Safety boreholes for Boxcut
Structural-geological analysis, i.e. core fracturing assessment within the boxcut safety\nborehole was carried out on the basis of optical televiewer record evaluation. In general,\noptical televiewer ...
DCTOOL-A4
Bakule, Lubomír; Papík, Martin; Rehák, Branislav
2018 - anglický
DCTOOL-A4 report presents draft of a manuscript, which is intended to be submitted for publication. The report provides a novel systematic approach to the analysis of asymptotic stability for output event-triggered uncertain centralized control systems. A class of nonlinear but nominally linear systems possessing unknown time-varying bounded uncertainties with known bounds is considered. Uncertainties are allowed in all system matrices. Original LMI-based suffi cient conditions are derived to guarantee asymptotic stability of closed-loop systems with both static output and observer-based feedback loop under even-triggered control. Both these output feedback strategies are extended to model-based uncertain control systems with\nquantized measurements. A logarithmic quantizer is considered. The Lyapunov-based approach and convex optimization serve as the main methods to derive the asymptotic LMI-based stability conditions. Bounds on the inter-event times to avoid the Zeno-effect are proved for all the cases considered. Finally, feasibility and effi ciency of the proposed strategies is demonstrated by providing numerical examples.
Klíčová slova:
event-triggered control; networked control systems; large scale complex systems
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
DCTOOL-A4
DCTOOL-A4 report presents draft of a manuscript, which is intended to be submitted for publication. The report provides a novel systematic approach to the analysis of asymptotic stability for output ...
Collimator - test readiness review
Budasz, Jiří; Kaván, František; Kredba, Jan; Lédl, Vít; Mach, Marek; Pleštil, Jan; Psota, Pavel; Steiger, Lukáš; Tomka, David; Václavík, Jan; Veselý, Martin
2018 - anglický
This document describes the test procedure applicable to the overall functional test of the NEOSTED collimator.\nThe test to be performed according to this procedure are to demonstrate the compliance of the above item to the requirements specified in the applicable document as part of the overall verification program. The test results shall be collected in a Test Report.
Klíčová slova:
collimator; PLC system; telescope; interferometry
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Collimator - test readiness review
This document describes the test procedure applicable to the overall functional test of the NEOSTED collimator.\nThe test to be performed according to this procedure are to demonstrate the compliance ...
Technical manual - neosted SOT test bench
Steiger, Lukáš
2018 - anglický
The purpose of this document is to provide basic set of rules and instructions that allows using and maintaining of the NEOSTED SOT test bench (BB).\nFurther detailed informations and proper references about individual parts of the BB system can be found in [AD-2, AD-3].
Klíčová slova:
test bench; optical testing; collimator; neosted
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Technical manual - neosted SOT test bench
The purpose of this document is to provide basic set of rules and instructions that allows using and maintaining of the NEOSTED SOT test bench (BB).\nFurther detailed informations and proper ...
Hydroacoustic assessment of the fish stock in Lake Balaton in 2017
Tušer, Michal; Muška, Milan
2018 - anglický
This report describes a study of open-water fish assemblage in Lake Balaton, Hungary, in 2017. The lake was acoustically surveyed using two horizontally-oriented 120 kHz transducers. The observed fish stock was assessed on the basis of fish sizes, abundance, biomass, and spatial distribution in the lake.
Klíčová slova:
biomass; abundance; open-water distribution
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Hydroacoustic assessment of the fish stock in Lake Balaton in 2017
This report describes a study of open-water fish assemblage in Lake Balaton, Hungary, in 2017. The lake was acoustically surveyed using two horizontally-oriented 120 kHz transducers. The observed fish ...
Entrepreneurship in the information age: an empirical analysis of the European regions
Pleticha, Petr
2018 - anglický
Decelerating productivity in recent years raised questions about technology diffusion in the economy. This study focuses on one particular diffusion channel, entrepreneurship, and inspects the mechanics through which it interacts with digitalization. The composite indicator of digitalization is split into separate components which enables analyzing digitalization’s interplay with entrepreneurship as a dynamic process. Based on the econometric analysis of Eurostat regional data covering the period 2008-2015, I find significant links between digitalization and entrepreneurship. Specifically, digitalization is associated with an increase in the rate at which firms are created and with a decrease in their survival rate after 3 years. The paper demonstrates that the interaction is dynamic in its nature as the effects of initial stages of digitalization reverse or vanish in its later phases. A sectoral analysis shows the persistence of the results across industries.\nMoreover, there is evidence that professional, scientific and technical activities are especially sensitive towards digitalization, experiencing strong, yet short-term shock in the firms’ birth, death, and survival rates. Accounting for geographic variation reveals heterogeneity between regions but not large enough to affect the overall results.
Klíčová slova:
digitalization; entrepreneurship; technology dissemination
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Entrepreneurship in the information age: an empirical analysis of the European regions
Decelerating productivity in recent years raised questions about technology diffusion in the economy. This study focuses on one particular diffusion channel, entrepreneurship, and inspects the ...
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