Rainwater management

Diplomová práca sa zaoberá problematikou decentralizovaného hospodárenia s dažďovými vodami, ktorá reaguje na legislatívne požiadavky ohľadom povinnosti akumulácie, vsakovania a retencie zrážkových vôd v mieste ich dopadu. Práca je rozdelená na rešeršnú časť, v ktorej sú predstavené možné zariadenia na hospodárenie so zrážkovými vodami, ale aj limity ich použitia a konštrukčné zásady. V praktickej časti je vypracovaná technická správa, ktorá detailne rieši 3 navrhované objekty vo vnútrobloku na Bakalovom nábreží v Brne. Súčasťou technickej správy je aj analýza územia, hydrotechnické výpočty pre jednotlivé objekty a ich funkčné a technické riešenie. Prílohou technickej správy je aj výkresová dokumentácia. Posledná časť práce sa venuje celkovému posúdeniu zámeru.The diploma thesis deals with the issue of decentralized stormwater management, which responds to legislative requirements regarding the obligation of accumulation, collection and retention of stormwater at the point of impact. The thesis is divided into a research part, in which possible devices for rainwater management are presented, as well as the limits of their use and design principles. In the practical part, a technical report is elaborated, which solves in more detail the 3 proposed objects in the inner block of the Bakalovo nábřeží in Brno. The technical report also includes an analysis of the area, hydrotechnical calculations for individual objects and their functional and technical solutions. The technical report is also accompanied by drawings. The last part of the work is devoted to the overall project evaluation.

Analysis and optimization of cycling transport in Bratislava

Bakalárska práca analyzuje súčasný stav cyklodopravy v meste Bratislava predovšetkým so zreteľom na dosiahnutie bezpečnosti a komfortu pri používaní bicykla ako dopravného prostriedku. Práca kladie dôraz na cyklodopravu ako na hnací motor udržateľnej mobility a zdravej, prosperujúcej spoločnosti. Z analýzy vyplýva, že kvalitná cyklistická infraštruktúra môže pomôcť mestu Bratislava s narastajúcimi dopravnými problémami a znečisteným ovzduším. Teoretická časť obsahuje informácie ako zvýšiť bezpečnosť cyklodopravy a ako upokojovať mestskú dopravu v prospech cyklodopravy. Analytická časť hodnotí súčasný stav, kritické miesta a popisuje oblasti s cykloobojsmerkami. Praktická časť optimalizuje jestvujúce cyklotrasy s prioritou bezpečne segregovať cyklistov od zvyšku premávky v súlade s priestorovými možnosťami.The bachelor's thesis analyzes the current situation of bicycle transport in the city of Bratislava, especially with regard to achieving safety and comfort when using a bicycle as a means of transport. The work emphasizes bicycle transport as a driving force for sustainable mobility and a healthy, prosperous society. The analysis shows that quality cycling infrastructure can help the city of Bratislava with growing traffic problems and polluted air. The theoretical part contains information on how to increase the safety of bicycle transport and how to calm urban transport in favor of bicycle transport. The analytical part evaluates the current state, critical points and describes the areas with contra-flow cycling. The practical part optimizes the existing cycling routes with the priority of safely segregating cyclists from the rest of the traffic in accordance with the spatial possibilities.

Introducing Agile/DevSecOps into the Space Acquisition Environment

Excerpt from the Proceedings of the Nineteenth Annual Acquisition Research SymposiumThe University of Southern California (USC) and its Information Sciences Institute (USC-ISI) is undertaking research into improving the space-based systems acquisition process through the adoption of agile and DevSecOps methodologies. The USC-ISI team is currently undertaking research and systems engineering analysis to explore the mission engineering methods, analysis, metrics and training needed to transition from a traditional DoDI 5000.02 waterfall development environment to an agile/DevSecOps space systems acquisition environment. Over the past several years, the project team has been embedded at the U.S. Space Force’s Space Systems Command, Production Corps (SSC/PC), developing performance measuring tools, collecting performance metrics and providing subject matter expertise on three projects – a traditional waterfall project, a hybrid parallel waterfall and agile development project and an on-going long-term highly agile development effort that is subject to traditional waterfall acquisition reporting requirements. This paper summarizes initial research results and lessons learned along with a discussion on next steps.Approved for public release; distribution is unlimited

Introducing Agile/DevSecOps into the Space Acquisition Environment

Symposium PresentationApproved for public release; distribution is unlimited

Evidence for Harmonic Relationships in the High Frequency QPOs of XTE J1550-564 and GRO J1655-40

We continue to investigate the X-ray timing and spectral properties of the black hole binary, XTE J1550-564. For three different groups of observations, we show evidence that two high-frequency QPOs (HFQPOs) occur simultaneously near 184 and 276 Hz. In one group, there is also evidence of a broad feature at 92 Hz. In each case, we can model the QPO profiles while assuming that the central frequencies are related as integral harmonics of a single frequency. We next investigate the X-ray energy spectra, and we find a systematic increase in the strength of the power-law component as the stronger of the two HFQPOs shifts from 276 to 184 Hz. A strikingly similar result is seen for GRO J1655-40 when the stronger HFQPO shifts from 450 to 300 Hz. The fundamental HFQPO frequencies for the two X-ray sources scale inversely with black hole mass, which is consistent with the hypotheses that these HFQPOs represent some oscillation rooted in general relativity (GR) and that the two black holes have similar values of the dimensionless spin parameter. We discuss physical mechanisms that may explain these HFQPOs. In particular, a resonance between the orbital and radial coordinate frequencies in the innner accretion disk, as proposed by Abramowicz & Kluzniak, would imply moderate values for the dimensionless spin parameter (0.1 < a < 0.6) for both black holes.Comment: 31 pages, including 9 figures and 1 Table; submitted to The Ap

Planning to Explore: Using a Coordinated Multisource Infrastructure to Overcome Present and Future Space Flight Planning Challenges

Few human endeavors present as much of a planning and scheduling challenge as space flight, particularly manned space flight. Just on the operational side of it, efforts of thousands of people across hundreds of organizations need to be coordinated. Numerous tasks of varying complexity and nature, from scientific to construction, need to be accomplished within limited mission time frames. Resources need to be carefully managed and contingencies worked out, often on a very short notice. From the beginning of the NASA space program, planning has been done by large teams of domain experts working months, sometimes years, to put together a single mission. This approach, while proven very reliable up to now, is becoming increasingly harder to sustain. Elevated levels of NASA space activities, from deployment of the new Crew Exploration Vehicle (CEV) and completion of the International Space Station (ISS), to the planned lunar missions and permanent lunar bases, will put an even greater strain on this largely manual process. While several attempts to automate it have been made in the past, none have fully succeeded. In this paper we describe the current NASA planning methods, outline their advantages and disadvantages, discuss the planning challenges of upcoming missions and propose a distributed planning/scheduling framework (CMMD) aimed at unifying and optimizing the planning effort. CMMD will not attempt to make the process completely automated, but rather serve in a decision support capacity for human managers and planners. It will help manage information gathering, creation of partial and consolidated schedules, inter-team negotiations, contingencies investigation, and rapid re-planning when the situation demands it. The fist area of CMMD application will be planning for Extravehicular Activities (EVA) and associated logistics. Other potential applications, not only in the space flight domain, and future research efforts will be discussed as well

Bimodal coupling of ripples and slower oscillations during sleep in patients with focal epilepsy.

OBJECTIVE: Differentiating pathologic and physiologic high-frequency oscillations (HFOs) is challenging. In patients with focal epilepsy, HFOs occur during the transitional periods between the up and down state of slow waves. The preferred phase angles of this form of phase-event amplitude coupling are bimodally distributed, and the ripples (80-150 Hz) that occur during the up-down transition more often occur in the seizure-onset zone (SOZ). We investigated if bimodal ripple coupling was also evident for faster sleep oscillations, and could identify the SOZ. METHODS: Using an automated ripple detector, we identified ripple events in 40-60 min intracranial electroencephalography (iEEG) recordings from 23 patients with medically refractory mesial temporal lobe or neocortical epilepsy. The detector quantified epochs of sleep oscillations and computed instantaneous phase. We utilized a ripple phasor transform, ripple-triggered averaging, and circular statistics to investigate phase event-amplitude coupling. RESULTS: We found that at some individual recording sites, ripple event amplitude was coupled with the sleep oscillatory phase and the preferred phase angles exhibited two distinct clusters (p \u3c 0.05). The distribution of the pooled mean preferred phase angle, defined by combining the means from each cluster at each individual recording site, also exhibited two distinct clusters (p \u3c 0.05). Based on the range of preferred phase angles defined by these two clusters, we partitioned each ripple event at each recording site into two groups: depth iEEG peak-trough and trough-peak. The mean ripple rates of the two groups in the SOZ and non-SOZ (NSOZ) were compared. We found that in the frontal (spindle, p = 0.009; theta, p = 0.006, slow, p = 0.004) and parietal lobe (theta, p = 0.007, delta, p = 0.002, slow, p = 0.001) the SOZ incidence rate for the ripples occurring during the trough-peak transition was significantly increased. SIGNIFICANCE: Phase-event amplitude coupling between ripples and sleep oscillations may be useful to distinguish pathologic and physiologic events in patients with frontal and parietal SOZ

The Post-Common Envelope and Pre-Cataclysmic Binary PG 1224+309

We have made extensive spectroscopic and photometric observations of PG 1224+309, a close binary containing a DA white dwarf primary and an M4+ secondary. The H alpha line is in emission due to irradiation of the M-star by the hot white dwarf and is seen to vary around the orbit. From the radial velocities of the H alpha line we derive a period of P = 0.258689 +/- 0.000004 days and a semi-amplitude of K_Halpha = 160 +/- 8 km/s. We estimate a correction Delta_K = 21 +/- 2 km/s, where K_M = K_Halpha + Delta_K. Radial velocity variations of the white dwarf reveal a semi-amplitude of K_WD = 112 +/- 14 km/s. The blue spectrum of the white dwarf is well fit by a synthetic spectrum having T_eff = 29,300 K and log(g) = 7.38. The white dwarf contributes 97% of the light at 4500 Angstroms and virtually all of the light blueward of 3800 Angstroms. No eclipses are observed. The mass inferred for the white dwarf depends on the assumed mass of the thin residual hydrogen envelope: 0.40 < M_WD < 0.45 solar masses for hydrogen envelope masses of 0 < M_H < 4.0E-4 solar masses. We argue that the mass of the white dwarf is closer to 0.45 solar masses, hence it appears that the white dwarf has a relatively large residual hydrogen envelope. The mass of the M-star is then M_M = 0.28 +/- 0.05 solar masses, and the inclination is i = 77 +/- 7 degrees. We discuss briefly how PG 1224+309 may be used to constrain theories of close binary star evolution, and the past and future histories of PG 1224+309 itself. The star is both a ``post-common envelope'' star and a ``pre-cataclysmic binary'' star. Mass transfer by Roche-lobe overflow should commence in about 10 Gyr.Comment: 17 pages, 8 figures, AAS LaTeX, to appear in AJ, March 199

Selective inhibition of T suppressor-cell function by a monosaccharide

Interactions between regulatory T lymphocytes and other cells are assumed to occur at the level of the cell surface. T cells which suppress the generation of specifically effector cells have been described as having antigenic, idiotypic, allotypic and I-region specificity1−4. Other T suppressor cells generated by in vitro cultivation with or without mitogenic stimulation5,6 have suppressive activity for T and B cells but no specificity can be assigned to them. These T suppressor cells (Ts) inhibit various lymphoid functions—this either reflects their polyclonal origin or indicates that the structures recognized by the Ts receptors must be common for many cell types. Carbohydrates on cell membrane-inserted glycoproteins or glycolipids might function as specific ligands for recognition by cellular receptors or soluble factors. Almost all cell-surface proteins of mammalian cells are glycosylated. There is evidence for lectin-like carbohydrate binding proteins not only in plants7 but also in toxins8, viruses9, prokaryotic cells10 and even mammalian cells, including T cells11. A functional role for these lectin-like proteins has been described for slime moulds and suggested for the selective association of embryonic cells12,13. We report here that addition of a monosaccharide can counteract the effect of T suppressor cells during the generation of alloreactive cytotoxic T cells (CTLs) in vitro