62 research outputs found
NEW TRENDS IN GIS AND BIM FOR FACILITY MANAGEMENT IN THE CZECH REPUBLIC
Most of the state bureaus and ministries in the Czech Republic are located in the capital city Prague. The buildings are situated mostly in historical part of the city, where are high demands on compliance with the cultural heritage laws. Currently, the buildings are in unsatisfactory building conditions, their maintenance is expensive and due to complicated legislation and political processes the buildings are in a state of “permanent repairs”. More than twenty years our company operates and co-develops GIS/BIM application for facility management of administrative buildings in the Czech Republic. The main topics of this contribution is to present our general experiences in GIS and BIM development which is based on our concrete cases dealt with Czech ministries, to present basic legislation requirements in Czech facility management and to evaluate current trends in the field of GIS and BIM for facility management in the Czech Republic in response to other official state registries
USAGE OF PHOTOGRAMMETRIC PROCESSING OF THERMAL IMAGES FOR CIVIL ENGINEERS
In climate conditions of the Czech Republic is getting more important to carry out thermal inspection during documentation and inventory of buildings. Capturing and photogrammetric processing of thermal images requires special photogrammetric approaches especially because of low thermal image resolution. Part of this paper is focused on photogrammetric processing of thermal images using different methods with different 2D and 3D results which help civil engineers and architects better interpretation of thermal imaging. Those results are presented on chosen test objects. Photogrammetric results are also analysed in terms of geometric accuracy. The importance of integration of 2D and 3D results to GIS and BIM for facility management is discussed in final part of the paper
Quality of life after aortic valve repair is similar to Ross patients and superior to mechanical valve replacement: A cross-sectional study
Background: In patients after aortic valve surgery, the quality of life is hypothesized to be influenced by the type of the valve procedure. A cross-sectional study on the postoperative quality of life was carried out in patients after aortic valve-sparing surgery (with regards to the age of the patient), Ross procedure and mechanical aortic valve replacement. Methods: Quality of life was studied in 139 patients after aortic valve surgery divided into four study groups (Y - aortic valve-sparing procedure at the age below 50years, mean age 36.2years; O - aortic valve-sparing procedure at the age 50years and over, mean age 59.2years; R - Ross procedure, mean age 37.8years and M - mechanical aortic valve replacement at the age below 50years, mean age 39.2years). SF-36 Short Form and valve-specific questionnaires were mailed to the patients after 6months or later following surgery (median 26.9months). Results: In SF-36, the younger aortic valve repair patients and the Ross patients scored significantly better in 4 of 4 physical subscales and in 2 of 4 mental subscales than the older aortic valve repair and mechanical valve replacement patients. In the valve-specific questionnaire; however, all 3 groups free of anticoagulation (Y, O, and R) displayed greater freedom from negative valve-related concerns. Conclusions: Postoperative quality of life is influenced by the type of aortic valve procedure and is negatively linked with mechanical prosthesis implantation and long-term anticoagulation. Aortic valve-sparing strategy should be considered in cases with suitable valve morphology due to favorable clinical results and beneficial impact on the long-term quality of life
A minimal model of an autonomous thermal motor
We consider a model of a Brownian motor composed of two coupled overdamped
degrees of freedom moving in periodic potentials and driven by two heat
reservoirs. This model exhibits a spontaneous breaking of symmetry and gives
rise to directed transport in the case of a non- vanishing interparticle
interaction strength. For strong coupling between the particles we derive an
expression for the propagation velocity valid for arbitrary periodic
potentials. In the limit of strong coupling the model is equivalent to the
B\"uttiker-Landauer model [1-3] for a single particle diffusing in an
environment with position dependent temperature. By using numerical
calculations of the Fokker-Planck equation and simulations of the Langevin
equations we study the model for arbitrary coupling, retrieving many features
of the strong coupling limit. In particular, directed transport emerges even
for symmetric potentials. For distinct heat reservoirs the heat currents are
well-defined quantities allowing a study of the motor efficiency. We show that
the optimal working regime occurs for moderate coupling. Finally, we introduce
a model with discrete phase space which captures the essential features of the
continuous model, can be solved in the limit of weak coupling, and exhibits a
larger efficiency than the continuous counterpart.Comment: Revised version. Extended discussion on the discrete model. To appear
in EP
Proteomic Retrieval from Nucleic Acid Depleted Space-Flown Human Cells
Compared to experiments utilizing humans in microgravity, cell-based approaches to questions about subsystems of the human system afford multiple advantages, such as crew safety and the ability to achieve statistical significance. To maximize the science return from flight samples, an optimized method was developed to recover protein from samples depleted of nucleic acid. This technique allows multiple analyses on a single cellular sample and when applied to future cellular investigations could accelerate solutions to significant biomedical barriers to human space exploration. Cell cultures grown in American Fluoroseal bags were treated with an RNA stabilizing agent (RNAlater - Ambion), which enabled both RNA and immunoreactive protein analyses. RNA was purified using an RNAqueous(registered TradeMark) kit (Ambion) and the remaining RNA free supernatant was precipitated with 5% trichloroacetic acid. The precipitate was dissolved in SDS running buffer and tested for protein content using a bicinchoninic acid assay (1) (Sigma). Equal loads of protein were placed on SDS-PAGE gels and either stained with CyproOrange (Amersham) or transferred using Western Blotting techniques (2,3,4). Protein recovered from RNAlater-treated cells and stained with protein stain, was measured using Imagequant volume measurements for rectangles of equal size. BSA treated in this way gave quantitative data over the protein range used (Fig 1). Human renal cortical epithelial (HRCE) cells (5,6,7) grown onboard the International Space Station (ISS) during Increment 3 and in ground control cultures exhibited similar immunoreactivity profiles for antibodies to the Vitamin D receptor (VDR) (Fig 2), the beta isoform of protein kinase C (PKC ) (Fig 3), and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) (Fig 4). Parallel immunohistochemical studies on formalin-fixed flight and ground control cultures also showed positive immunostaining for VDR and other biomarkers (Fig 5). These results are consistent with data from additional antigenic recovery experiments performed on human Mullerian tumor cells cultured in microgravity (8)
Twenty-five year experience with aortic valve-sparing root replacement in a single teaching center
OBJECTIVES
Aortic valve-sparing root replacement (AVSRR) is a technically demanding procedure. In experienced centers it offers excellent short- and long-term results, making the procedure an attractive alternative for aortic root replacement especially in young patients. The aim of this study was to analyze long-term results of AVSRR using the David operation in our institution over the last 25 years.
METHODS
This is a single-center retrospective analysis of outcomes of David operations performed in a teaching institution not running a large AVSRR-program. Pre-, intra- and postoperative data were collected from the institutional electronic medical record system. Follow-up data were collected through direct contact of the patients and their cardiologists/primary care physicians.
RESULTS
Between 02/1996 and 11/2019, 131 patients underwent David operation in our institution by a total of 17 different surgeons. Median age was 48 (33-59), 18% were female. Elective surgery was performed in 89% of the cases, 11% were operated as emergency in the setting of an acute aortic dissection. Connective tissue disease was present in 24% and 26% had a bicuspid aortic valve. At hospital admission 61% had aortic regurgitation grade ≥3, 12% were in functional NYHA-class ≥III. 30-day mortality was 2%, 97% of the patients were discharged with aortic regurgitation ≤2. In 10-year follow-up, 15 (12%) patients had to be re-operated because of root-related complications. Seven patients (47%) received a transcatheter aortic valve implantation, 8 (53%) required surgical replacement of the aortic valve or a Bentall-De Bono operation. Estimated reoperation-free survival at 5 and 10 years was 93.5% ± 2.4% and 87.0% ± 3.5%, respectively. Subgroup analysis showed no differences in reoperation-free survival for patients presenting with a bicuspid valve or preoperative aortic regurgitation ≥3. However a preoperative left ventricular end diastolic diameter of ≥5.5 cm was associated with worse outcome.
CONCLUSION
David operations can be performed with excellent perioperative and 10-year follow-up outcomes in centers not running large AVSRR-programs
Optimal finite-time heat engines under constrained control
This is the final version. Available on open access from the American Physical Society via the DOI in this recordWe optimize finite-time stochastic heat engines with a periodically scaled Hamiltonian under experimentally motivated constraints on the bath temperature
T and the scaling parameter λ. We present a general geometric proof that maximum-efficiency protocols for T and λ are piecewise constant, alternating between the maximum and minimum allowed values. When λ is restricted to a small range and the system is close to equilibrium at the ends of the isotherms, a similar argument shows that this protocol also maximizes output power. These results are valid for arbitrary dynamics. We illustrate them for an overdamped Brownian heat engine, which can experimentally be realized using optical tweezers with stiffness λ.China Scholarship CouncilFundational Questions InstituteCaixa FoundationGovernment of SpainFundacio CellexFundacio Mir-PuigGeneralitat de Catalunya (CERCA)Engineering and Physical Sciences Research Council (EPSRC)Royal SocietySwiss National Science FoundationHumboldt foundationCzech Science Foundatio
Thermodynamics and optimal protocols of multidimensional quadratic Brownian systems
This is the final version. Available on open access from IOP Publishing via the DOI in this recordData availability statement;
All data that support the findings of this study are included within the article (and any supplementary files).We characterize finite-time thermodynamic processes of multidimensional quadratic overdamped systems. Analytic expressions are provided for heat, work, and dissipation for any evolution of the system covariance matrix. The Bures-Wasserstein metric between covariance matrices naturally emerges as the local quantifier of dissipation. General principles of how to apply these geometric tools to identify optimal protocols are discussed. Focusing on the relevant slow-driving limit, we show how these results can be used to analyze cases in which the experimental control over the system is partial.Humboldt FoundationCzech Science Foundation'la Caixa' FoundationGovernment of SpainSevero OchoaFundacio CellexFundacio Mir-PuigGeneralitat de CatalunyaFundational Questions Institute FundEngineering and Physical Sciences Research Council (EPSRC)China Scholarship CouncilSwiss National Science Foundatio
Analysis of landrace cultivation in Europe: A means to support in situ conservation of crop diversity
During the last century, the progressive substitution of landraces with modern, high yielding varieties, led to a dramatic reduction of in situ conserved crop diversity in Europe. Nowadays there is limited and scattered information on where landraces are cultivated. To fill this gap and lay the groundwork for a regional landrace in situ conservation strategy, information on more than 19,335 geo-referenced landrace cultivation sites were collated from 14 European countries. According to collected data, landraces of 141 herbaceous and 48 tree species are cultivated across Europe: Italy (107 species), Greece (93), Portugal (45) and Spain (44) hold the highest numbers. Common bean, onion, tomato, potato and apple are the species of main interest in the covered countries. As from collected data, about 19.8% of landrace cultivation sites are in protected areas of the Natura 2000 network. We also got evidence that 16.7% and 19.3% of conservation varieties of agricultural species and vegetables are currently cultivated, respectively. Results of the GIS analysis allowed the identification of 1261 cells (25 km Ă— 25 km) including all the cultivation sites, distributed across all European biogeographical regions. Data of this study constitute the largest ever produced database of in situ-maintained landraces and the first attempt to create an inventory for the entire Europe. The availability of such resource will serve for better planning of actions and development of policies to protect landraces and foster their use
Conformal mappings versus other power series methods for solving ordinary differential equations: illustration on anharmonic oscillators
The simplicity and the efficiency of a quasi-analytical method for solving
nonlinear ordinary differential equations (ODE), is illustrated on the study of
anharmonic oscillators (AO) with a potential
(). The method [Nucl. Phys. B801, 296 (2008)], applies a priori to any ODE
with two-point boundaries (one being located at infinity), the solution of
which has singularities in the complex plane of the independent variable . A
conformal mapping of a suitably chosen angular sector of the complex plane of
upon the unit disc centered at the origin makes convergent the transformed
Taylor series of the generic solution so that the boundary condition at
infinity can be easily imposed. In principle, this constraint, when applied on
the logarithmic-derivative of the wave function, determines the eigenvalues to
an arbitrary level of accuracy. In practice, for or slightly
negative, the accuracy of the results obtained is astonishingly large with
regards to the modest computing power used. It is explained why the efficiency
of the method decreases as is more and more negative. Various aspects
of the method and comparisons with some seemingly similar methods, based also
on expressing the solution as a Taylor series, are shortly reviewed, presented
and discussed.Comment: 32 pages, 7 figures, 8 table
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