bluuebunny/crossref_metadata_2025 huggingface dataset:
Damage Detection of Steel-Concrete Composite Beam
Authors: Szumigała Maciej , Pełka-Sawenko Agnieszka , Wróblewski Tomasz , Abramowicz Małgorzata
Published: January 2019

The paper presents analysis results of steel-concrete composite beams, identification and attempts to detect damage introduced in a discrete model. Analysis of damage detection was conducted using DDL (Damage, Detection, Localization), our own original algorithm. Changes of dynamic and static parameters of the model were analysed in damage detection. Discrete wavelet transform was used for damage localization in the model. Prior to ultimate analysis, two-tier identification of discrete model parameters based on experimental data was made. In identification procedure, computational software (Python, Abaqus, Matlab) was connected in automated optimization loops. Results positively verified the original DDL algorithm for damage detection in steel-concrete composite beams, which enables further analysis using experimental data.
Ecological and Social Aspects in the Managementof Post-Mining Areas.an Example of the Adamów Lignite Basin
Authors: Fagiewicz Katarzyna , Mękarski Michał
Published: January 2019

The study presents a management model for post-mining areas, which includes the process of reclamation and management in the context of the socio-ecological system. This means that it is necessary to include the relations in the management system that occur between the main stakeholders (internal relations) and the ecological, economic and socio-cultural conditions of the environment (external relations). Verification of the recommended model was carried out on the basis of the analysis of environmental, economic and socio-cultural processes currently observed in the Adamów Brown Coal Basin, which is in the phase of liquidation. The conclusion presents constraints in the legal system that are not propitious for comprehensive solutions in the field of revitalization.
Properties of the Organic Fraction Directed to Biostabilization in Mbt Installations During the Heating Season
Authors: Jędrczak Andrzej
Published: January 2019

In the professional literature, there is no information about the sieve and morphological composition OFMSW (<80 mm) subjected to biological processing in MBT installations during the heating season. Knowledge about the quality of this fraction is important because it significantly affects the course of the biostabilization process. The paper presents the morphological composition, sieve composition, humidity, loss on ignition and organic carbon content of <80 mm fraction separated from municipal waste delivered to 21 MBT installations in Poland, in winter. The results show that about 1/3 of the OFMSW (34.0 ± 10.6%) mass is a fine fraction (<20 mm), mainly furnace waste. The organics share was on average 39.3 ± 10.4%. The fraction “paper and cardboard” was also present in the bulk of OFMSW, an average of 10.5 ± 4.3%. The shares of other components did not exceed 5%. The large number of batteries in OFMSM was surprising, despite their widespread selective collection. The high content of fine fraction (ashes) and inert components in OFMSW during the heating season results in low hydration and low losses of waste incineration, which may even determine their inability to be processed biologically.
Efficiency of Sewage Treatment Plants in the Sequential Batch Reactor
Authors: Jakubaszek Anita , Stadnik Artur
Published: January 2019

The article analyzes the effectiveness of individual Actibloc wastewater treatment plants (produced by Sotralentz) working in the technology of low-rate activated sludge in the Sequential Batch Reactor (SBR) system. The assessment of the effectiveness of household wastewater treatment plants was made on the basis of pollutants: BOD5, COD, total suspended solids, total nitrogen and total phosphorus. The research objects were four household sewage treatment plants located in: Lubań, Kłębanowice, Stara Rzeka and Kościan. The efficiency of removing pollutants in the examined facilities was in the range of: BOD5 92.2 ÷ 97.2%, COD 82.6 ÷ 89.9%, total suspended solids 90.2 ÷ 96.2%, total nitrogen 50.8 ÷ 83.1%, total phosphorus 46.5 ÷ 73.6%. The treated wastewater met the requirements set out in the Regulation of the Minister of the Environment on the conditions to be met when discharging sewage into water or soil, and on substances particularly harmful to the aquatic environment (Journal of Laws 2014, item 1800) in terms of indicators such as BOD5, COD, total suspended solids and total nitrogen. The effectiveness of phosphorus removal in the studied treatment plants was much lower.
Optimization of Municipal Energy Systems with the Use of an Intelligent Analytical System
Authors: Ziembicki Piotr , Klimczak Marcin , Bernasiński Jan
Published: January 2019

The paper presents the analytical and consultancy system which aims at a complex, comprehensive, multi-criteria energy performance analysis of a given building or a group of buildings and at making a recommendation for an energy source with regard to CO2 emission and investment costs determined on the basis of indicators included in the knowledge databases. The analytical and consultancy system employs advanced energy performance computer simulations of buildings as well as innovative analytical algorithms worked out and contributed by the authors, including those based on the knowledge base developed on the grounds of performance data from selected buildings of various types situated in a dozen or so cities of different population in Poland.
Matlab tool REGCONT2: effective source depth estimation by means of Tikhonov’s regularized downwards continuation of potential fields
Authors: Pašteka Roman , Kušnirák David , Karcol Roland
Published: January 2019

Transformation based on downward continuation of potential fields is an important tool in their interpretation – depths of shallowest important sources can be determined by means of stable downward continuation algorithms. We analyse here selected properties of one from these algorithms (based on Tikhonov’s regularization approach) from the scope of two most important discretization parameters – dimensions of the areal coverage of the interpreted field and the sampling interval size. Estimation of the source depth is based on the analysis of computed LP-norms for various continuation depths. A typical local minimum of these norms disappears at the source depth. We show on several synthetic bodies (sphere, horizontal cylinder, vertical rod) and also real-world data-sets (results from a magnetic survey for unexploded ordnance detection) that there is a need for relatively large surroundings around the interpreted anomalies. Beside of this also the sampling step plays its important role – grids with finer sampling steps give better interpretation results, when using this downward continuation method. From this point of view, this method is more suitable for the interpretation of objects in near surface and mining geophysics (anomalies from cavities, unexploded ordnance objects and ore bodies). Anomalies should be well developed and separable, and densely sampled. When this is not valid, several algorithms of interpolation and extrapolation (grid padding methods) can improve the interpretation properties of studied downward continuation method.
Structural setting of the Koum sedimentary basin (north Cameroon) derived from EGM2008 gravity field interpretation
Authors: Shandini Yves , Kouske Patrice Arnaud , Nguiya Severin , Marcelin Mouzong Pemi
Published: January 2019

This study is a contribution to the planning of hydrocarbon exploration program of the Koum sedimentary basin in North Cameroon. 3D modeling of WGM2012 gravity data derived from EGM2008 geopotential model in the Koum basin was used together with existing geological and spectral analysis information to give structural picture of the basin. The 3D model of the Koum basin confirms that the basin is developed as a half graben bounded by sub-vertical faults. The thickness of the Cenozoic sediments is about 1.5 km in the eastern part and reaches 4.5 km in the western part of the basin. Gravity lineaments computed by multi-scale analysis revealed structural trends in the E–W, NW–SE, NE–WS and N–S directions. The faults in the sedimentary terrain reach 6 km depth and have a predominant NW–SE trend with E–W trending faults along the contact between the sedimentary section and the basement complex in the northern edge.
Estimation of Bouguer correction density based on underground and surface gravity measurements and precise modelling of topographic effects – two case studies from Slovakia
Authors: Zahorec Pavol , Papčo Juraj
Published: January 2019

We present a simple and straightforward method for estimating the mean density of topographic masses based on underground gravity measurements along with topography modelling. Two examples under different conditions are given, the first coming from a railway tunnel passing through a Mesozoic karst area and the second from an active coal mine situated in a Neogene sedimentary basin. Relative gravity measurements were processed and corrected by topographic effect modelling based on high-precision airborne LiDAR-derived elevation models. In addition, detailed mining tunnel gravimetric modelling based on terrestrial laser scanning data is presented. Resulted mean (bulk) densities are compared with those obtained from detailed surface gravity measurements as well as with available rock-samples density analysis.
The National Network of Seismic Stations of Slovakia – Current state after 13 years in operation from the project of modernization and enhancement
Authors: Csicsay Kristián , Cipciar Andrej , Fojtíková Lucia , Kristeková Miriam , Gális Martin , Srbecký Miroslav , Chovanová Zuzana , Bystrický Erik , Kysel Róbert
Published: January 2019

We present the state of the modernized, upgraded and enhanced National Network of Seismic Stations (NNSS) of Slovakia at the end of the year 2017 and the importance of the Project: Modernization and enhancement of the National Network of Seismic Stations which took place in years 2001–2004. In this period some stations were modernized and upgraded and several new stations were built in various places in Slovakia to increase ability to localize seismic events on the territory of Slovakia and adjacent areas. Before the year 2001 the average number of localized earthquakes on the territory of Slovakia was only 7 per year. The breakthrough occurred in the year 2005 with the fully operational network when the number of localized earthquakes with epicentre on the territory of Slovakia was increased up to 50. Now this number is approximately 70–90 earthquakes per year. We present the changes in the NNSS in the last 13 years, obtained results (some of them are preliminary), advantages and weaknesses of the NNSS and future plans toward further improvements of our seismic network system.
Determination of Humectants in Tobacco Filler by High Performance Chromatography/Single Quadrupole Mass Spectrometry
Authors: Xizheng Yan , Valentín-Blasini Liza , Watson Clifford , Cardenas Roberto Bravo
Published: January 2019

Glycerol, and 1,2-propylene glycol are the humectants most commonly used by the tobacco industry. They are found in a variety of tobacco products and are often present at high levels (~2–5 % w/w). While humectants are generally considered safe, they may serve as precursors in the formation of harmful carbonyl compounds. A selective, precise, and sensitive method for the quantification of several humectants in cigarette filler was developed. The method’s sample clean-up is a two-step process consisting of a mechanical extraction, followed by solid phase extraction. Individual humectants are separated, identified, and measured using liquid chromatography coupled to a single quadrupole mass spectrometer as the detector (LC/MS). Detection limits were 0.105, 0.575, and 0.039 mg/cigarette for glycerol, 1,2-propylene glycol and triethylene glycol, respectively. The quantification range for these analytes was 0.4–75.0 mg/cigarette. Twenty-seven brands of domestic commercial cigarettes were evaluated to assess typical levels of humectants in the tobacco filler.
Determination of Hydrogen Cyanide in Cigarette Smoke by Continuous Flow Analysis Method Using Safer Chemistry
Authors: Maranna Manjunatha Chinnaiahnapalya , Saikrishnan Lalgudy Mahadevan , Dinesh Tarur Konikkaledom , Tyagi Kamal Kumar
Published: January 2019

A new safe and sensitive method to determine hydrogen cyanide (HCN) in cigarette smoke using continuous flow analyser (CFA) has been developed and validated. The use of highly toxic potassium cyanide (KCN) as a standard necessitates the development of a safer method for the determination of HCN in cigarette smoke. In this described method KCN is replaced by less toxic potassium tetracyanozincate (Lethal Dose LD50 oral is 7.49 mg/kg for KCN and 2000 mg/kg for potassium tetracyanozincate). Furthermore, the new method uses isonicotinic acid-barbituric acid (coupling reagent) instead of pyridine-pyrazolone as a reagent for the determination of HCN, and hence eliminates the use of pyridine. In this method HCN is trapped on both the Cambridge Filter Pad, then extracted with aqueous sodium hydroxide solution, and in an impinger containing the same solution. The solution thus extracted is oxidised to cyanogen chloride by Chloramine-T and treated with coupling reagent, the resulting stable chromophore was measured colorimetrically at 600 nm. The regression equation was linear in the range of 1 to 25 μg/mL for cyanide with a correlation coefficient (R2) > 0.9998. The limit of detection (LOD) was 0.76 μg/cig and the overall relative standard deviation (RSD) of the method was less than 10%. Excellent recoveries of cyanide were obtained in the range from 92% to 112% and the HCN yields from the Kentucky Reference Cigarette 3R4F obtained from the newly developed method are in good agreement with those from the conventional KCN method. The proposed method is robust, reliable, selective and safer than any of the existing methods for determination of hydrogen cyanide in mainstream as well as in sidestream cigarette smoke.
Of counterfeits and delusions: Revisiting Ryle on skepticism and the impossibility of global deceit
Authors: McDermid Douglas
Published: January 2019

Consider the following proposition: (Q) It is possible that all of our perceptual experiences are ‘delusive.’ According to Gilbert Ryle, (Q) is demonstrably absurd. In this paper I address four questions: (1) What is Ryle’s argument against (Q)?; (2) How persuasive is it?; (3) What positions are ruled out if (Q) is absurd?; and (4) How does Ryle’s position compare with contemporary work on skepticism?
Baier and Cottingham on the meaning of life
Authors: Metz Thaddeus
Published: January 2019

I examine two recent books by analytic philosophers that address the underexplored topic of whether the meaning of life depends on the existence of a supernatural realm including God and a soul. John Cottingham’s On the Meaning of Life defends a supernaturalist conception of life’s meaning, whereas Kurt Baier’s Problems of Life and Death defends the opposite, naturalist perspective. I show that their respective arguments are worth serious consideration, indicate some potential weaknesses in them, and suggest some other argumentative strategies that those interested in this fascinating topic might pursue elsewhere in more depth.
Flanagan and Cartesian free will: a defense of agent causation
Authors: Lemos John
Published: January 2019

In a recent book, The Problem of the Soul, Owen Flanagan discusses the Cartesian, or agent causation, view of free will. According to this view, when a person acts of his own free will his action is not caused by antecedent events but is caused by the agent himself, and in acting the agent acts as an uncaused cause. Flanagan argues at length that this view is false. In this article, I defend the agent causation view against Flanagan’s criticisms and I go on to critically address his own ‘neo-compatibilist’ alternative to the agent causation view. In doing so, I hope to exhibit some common misconceptions about the nature of the agent causation view and to show that this is a view that deserves more serious consideration.
Yablo’s Paradox and Beginningless Time
Authors: Luna Laureano
Published: January 2019

The structure of Yablo’s paradox is analysed and generalised in order to show that beginningless step-by-step determination processes can be used to provoke antinomies, more concretely, to make our logical and our ontological intuitions clash. The flow of time and the flow of causality are usually conceived of as intimately intertwined, so that temporal causation is the very paradigm of a step-by-step determination process. As a consequence, the paradoxical nature of beginningless step-by-step determination processes concerns time and causality as usually conceived.
Commitment: some formal interpretations
Authors: Rönnedal Daniel
Published: January 2019

We often use sentences that seem conditional in nature when we reason about normative issues, e.g. ‘If you have promised to do something, you should keep your promise’ and ‘If you have done something bad, you should apologize’. We seem to think that promise-making in some sense commits us to promise-keeping and that acting bad in some sense creates an obligation to apologize. It is, however, not obvious how we should symbolize such sentences in a formal language. The purpose of this essay is to investigate some different possible formalizations of different conditional obligation sentences. I consider seven different interpretations of the concept of commitment or conditional obligation and I say something about the logical properties of these different interpretations.
Philosophy as a Protoscience
Authors: Costa Cláudio F.
Published: January 2019

My intention in this paper is to investigate the structural and dynamic relationships between philosophy and science, particularly the view that philosophy anticipates and leads into science. This investigation shades some light on the nature of both, philosophy and science, and on their mutual relations.
Opacity, Know-How States, and their Content
Authors: Toribio Josefa
Published: January 2019

The main goal of this paper is to defend the thesis that the content of know-how states is an accuracy assessable type of nonconceptual content. My argument proceeds in two stages. I argue, first, that the intellectualist distinction between types of ways of grasping the same kind of content is uninformative unless it is tied in with a distinction between kinds of contents. Second, I consider and reject the objection that, if the content of know-how states is non-conceptual, it will be mysterious why attributions of knowing how create opaque contexts. I show that the objection conflates two distinct issues: the nature of the content of know-how states and the semantic evaluability of know-how ascriptions.
Why Theories of Concepts Should Not Ignore the Problem of Acquisition
Authors: Carey Susan
Published: January 2019

A theory of conceptual development must provide an account of the innate representational repertoire, must characterize how these initial representations differ from the adult state, and must provide an account of the processes that transform the initial into mature representations. InThe Origin of Concepts(Carey 2009), I defend three theses: (1) the initial state includes rich conceptual representations, (2) nonetheless, there are radical discontinuities between early and later developing conceptual systems, (3) Quinean bootstrapping is one learning mechanism that underlies the creation of new representational resources, enabling such discontinuity. Here I argue that the theory of conceptual development developed inThe Origin of Conceptsconstrains our theories of concepts themselves, and addresses two of Fodor’s challenges to cognitive science; namely, to show how learning could possibly lead to an increase in expressive power and to defeat Mad Dog Nativism, the thesis that all concepts lexicalized as mono-morphemic words are innate. In response to Fodor, I show that, and how, new primitives in a language of thought can be learned, that there are easy routes and hard ones to doing so, and that characterizing the learning mechanisms in each illuminates how conceptual role partially determines conceptual content.
Dummett’s Legacy: Semantics, Metaphysics and Linguistic Competence
Authors: Vignolo Massimiliano
Published: January 2019

Throughout his philosophical career, Michael Dummett held firmly two theses: (I) the theory of meaning has a central position in philosophy and all other forms of philosophical inquiry rest upon semantic analysis, in particular semantic issues replace traditional metaphysical issues; (II) the theory of meaning is a theory of understanding. I will defend neither of them. However, I will argue that there is an important lesson we can learn by reflecting on the link between linguistic competence and semantics, which I take to be an important part of Dummett’s legacy in philosophy of language. I discuss this point in relation to Cappelen and Lepore’s criticism of Incompleteness Arguments.
What it is to be an Intentional Object
Authors: Spinelli Nicola
Published: January 2019

This paper is about a certain view of intentionality, a problem faced by the view, and two ways in which, it has been proposed, the problem might be solved. The view is that every intentional state has an intentional object. The problem is that the putative intentional objects of some intentional states do not, or even cannot, exist. The two strategies to solve the problem and secure the view are those implemented by Tim Crane in his article “Intentional Objects” (2001). In this paper I argue that both Crane’s implementations and the strategies in general are unsuccessful. By way of (partial) overview, I also discuss other ways in which the problem has been addressed.
Pragmatism. Propositional Priority and the Organic Model of Propositional Individuation
Authors: Frápolli María J. , Villanueva Neftalí
Published: January 2019

We identify two senses of ‘pragmatics’ and related terms that give rise to two different methods of propositional individuation. The first one is the contextualist approach that essentially acknowledges contextual information to take part in the determination of what is said by the utterance of a sentence. In this sense, Pragmatics relies on the Principle of Compositionality and interprets propositions as structured entities. It epitomises the Building-block Model of Propositional Individuation. The general approach that makes what the agents do the grounding level of philosophical and linguistic analysis characterizes the second sense, Pragmatism. It finds its clearest expression in Peirce’s Pragmatist Maxim, and it relies on (a particular interpretation of) the Fregean Principle of Context, and supports a view of propositions as unstructured entities. This is the Organic Model of Propositional Individuation. There is a test, the Analytic Equivalence Test, that tells apart the two models. According to it, the answer to the question whether a theory makes room for different but analytically equivalent propositions determines the model the theory belongs in. A positive answer classifies the theory as belonging to the building-block model; a negative answer allocates the theory within the organic model.
Can the Unconscious Image Save “No Overflow”?
Authors: D’Aloisio-Montilla Nicholas
Published: January 2019

The question of whether phenomenal consciousness is limited to the capacity of cognitive access remains a contentious issue in philosophy. Overflow theorists argue that the capacity of conscious experience outstrips the capacity of cognitive access. This paper demonstrates a resolution to the overflow debate is found in acknowledging a difference in phenomenological timing required by both sides. It makes clear that the “no overflow” view requires subjects to, at the bare minimum, generate an unconscious visual image of previously presented items if it is to explain performance in the change detection paradigm. It then demonstrates that conscious imagery should support better task performance than unconscious imagery because of a necessary difference in representational strength. However, this contradicts empirical findings, and so a new argument for overflow is presented without requiring the premise that subjects need to obtain a specific phenomenology of presented items during change detection.
Cashless Society – The Future of Money or a Utopia?
Authors: Fabris Nikola
Published: January 2019

In recent years we have witnessed a growing trend in cashless transactions as well as products and services sold exclusively in this way. Also, after the onset of the global financial crisis, private crypto currencies appeared that have raised some concerns. All of these changes beg the question of whether modern societies are moving towards a cashless society. This also raises a number of other dilemmas such as whether cashless societies have negative implications, whether they have what should be the response of economic policymakers, who would be potential winners and losers, and the like.

The paper analyses the arguments both in favour and against cashless society, the future of crypto currencies, as well as potential responses of economic policymakers to the emergence of a cashless society. The paper concludes with the observation that it is not reasonable to expect the transition to a cashless society in the near future but the next step in the evolution of money might be the appearance of central bank digital currencies, at least in some countries.
Linkages Between Fiscal Policy and Financial (In)Stability
Authors: Dumičić Mirna
Published: January 2019

This paper identifies and describes some of the main channels through which fiscal policy is linked to financial stability. For that purpose, several features of public debt related to financial stability are explored, such as public debt management and its sustainability, government’s funding costs and their impact on costs of funding for private sector, financial institutions’ exposures to the government etc. The part related to the tax policy elaborates on its countercyclical capacity, the role of automatic stabilizers, tax incentives that encourage or discourage certain type of financing, and impact of tax reliefs on systemic risks, particularly those targeted at the real estate. Fiscal policy role during the periods of strong capital inflows is also described from the financial stability point of view, which is followed by the overview of fiscal and quasi-fiscal costs of financial instability. Specific problem of different time horizon of economic policymakers’, which is in the case of fiscal policy usually related to election cycles and thus negatively affects its countercyclical capacity, is also explored. Given the relevance of the identified channels for financial stability, it can be expected that macroprudential capacity of fiscal policy will gain much more attention in the future research and policy work.
Russian Lawfare – Russia’s Weaponisation Of International And Domestic Law: Implications For The Region And Policy Recommendations
Authors: Voyger Mark
Published: January 2019

The attempts by Russia under President Putin to assert its hegemonic ambitions against Ukraine and the other countries in what Russia perceives as its “Near Abroad”, have posed serious challenges to the security of the region and the entire international order of the 21st century. „Lawfare (legal warfare) is a pivotal element of Russia’s hybrid toolbox that has remained under-studied by the analytical community Given Lawfare’s central role in Russia’s comprehensive strategy, NATO must develop a deeper understanding of this Russian hybrid warfare domain, and design a unified strategy to counter this major challenge to the European security architecture.
Modernisation of a Breathing Simulator Hoist. Part 1
Authors: Talaśka Zbigniew , Jakus Bartłomiej
Published: January 2019

This article presents the process of modernisation of a car lift in order to adjust it to the function of a hoist for lifting the decompression chamber cover in a breathing simulator used in the Department of Underwater Work Technology of the Naval Academy in Gdynia.
Description of the Adsorption Equilibrium with Consideration to the Decreasing Availability of Space in the Course of Mobile Adsorption of a Single Gas on a Homogenous Surface of Solid
Authors: Garbacz Jerzy K. , Kopkowska Ewa , Rymian Barbara
Published: January 2019

The subsequent stages of the process of formulation of the equation for gas adsorption on a homogenous surface of a solid adsorbent were presented based on the general expression for the canonical ensemble of the mobile single-component adsorption monolayer. The method of formulating the configuration integral of the proposed model was discussed in detail where the role both of the attraction and repulsion between adsorbed molecules was emphasised. The expression for the probability of finding a molecule in a specified point on a surface of an adsorbent was modified by determining its magnitude by the adsorbent concentration. The expression for the so-called effective surface of the adsorbent was obtained by adapting a two-dimensional analogue equation of state hard spheres – Van der Waals equation (2D-vdW) and Reis-Frisch-Lebowitz equation accordingly (2D-RFL). As a result, two new adsorption equations were formulated which differ in detail concerning the adsorbate-adsorbate repulsion. On each of these equations theoretical analysis was performed in terms of two-dimensional phase transformation. In both cases it was proved that the proposed solution allows for the presence of two-phase transformations of the first type which is the gas-liquid condensation and solidification liquid-solid. The verification of the given approach was supplemented by the description of the experimental data given in reference literature and by obtaining a very good correlation between the theory and experiment.
Diabetic Patients Who are Amateur Divers
Authors: Ługowska Daria , Ługowski Tomasz , Krzywińska Olga , Kozakiewicz Mariusz , Grzelakowski Paweł
Published: January 2019

Diabetes is an “epidemic of the 21st century” and it is estimated that in 2011 6.7% of Poland’s population suffered from diabetes, one quarter of which was unaware of the disease. Such a high prevalence of diabetes mellitus results in an increasing number of physicians being confronted with the problem of qualifying patient with diabetes to partake in amateur sports, including diving. This publication presents the most important information concerning risk assessment, admission of diabetic patients to amateur diving and some proposed protocols of management before and during sport practice.
Risk Management in Kitesurfing as a Basic Condition of Effective Learning and Safe Swimming
Authors: Wiesner Wojciech , Kunysz Piotr
Published: January 2019

This article discusses issues related to safety during kitesurfing (swimming on a board with a kite). The considerations are based on risk management procedures. These procedures can be described interchangeably as managing your own safety. Risk management allows you to minimize threats without sacrificing your planned sport goals. The authors first describe the procedures related to the identification of threats occurring in this discipline. Teaching and practicing kitesurfing involves overcoming a large number of threats. These threats can have both external and internal character. The next stage is risk analysis, understood as the product of negative events and the probability of their occurrence. Afterwards, we discuss the ways of dealing with the threat in the event of its occurrence. The last stage is the risk control (tracking) - whether new threats have emerged, or the level of risk has remained unchanged. The described methodical impacts can be labelled as education for safety.
Hardfacing material solutions for high performance coatings in wear and corrosion applications
Authors: Schreiber Frank , Allebrodt Benedikt , Erpel Tim
Published: January 2019

The protection of machinery and structural components by thermal coatings is of huge economic importance. Each hour of downtime, caused by deficient coatings as a result of wear and corrosion, costs a fortune. Savings by reducing these downtime hours can be achieved by applying optimized functional coatings which show enhanced properties. The main welding processes for applying coatings are GMAW or OA, PTA or Laser, each with their pros and cons. The PTA process can be seen as the intermediate process bridging the low cost, high deposition rate and the expensive but high end Laser. Recently, the PTA and especially the laser process are gaining more attention and market shares. Nowadays the flux-cored wires can be upgraded more and more with for instance complex carbides and achieve coatings similar to the high performance coatings obtained by PTA and Laser welding but at much lower costs. The common problems accompanying the GMAW process: a large heat affected zone and dilution, can be circumvented by using the cold metal transfer (CMT), the AC-GMAW- and the GMAW hot wire process, allowing the flux-cored wires to fully deploy their large potential and compete with the welding techniques. The current paper will describe the modern GMAW hot wire process and then deal with innovative materials and process concepts for the high performance flux-cored wire to give a competitive alternative for the PTA process and expensive laser.
“Quem adora as imagens adora o diabo”
Authors: Hussak van Velthen Ramos Pedro
Published: January 2019

A partir de um enunciado inscrito em um muro no centro do Rio de Janeiro, este artigo pretende fazer uma reflexão sobre uma tendência iconoclasta verificável no Brasil de hoje. Dois aspectos são enfocados: em primeiro lugar, alguns exemplos do que se pode chamar de “iconoclastia neo-pentecostal” contra expressões culturais afro-brasileiras. A este respeito, analisar-se-á a reação de setores neo-pentecostais à obra Tridente de Nova Iguaçu do artista contemporâneo Alexandre Vogler, na qual a imagem de um Tridente, símbolo que pertence à iconografia das religiões afro-brasileiras, foi tomada como um símbolo diabólico. Em segundo lugar, a forte reação conservadora contra a arte contemporânea hoje no Brasil, em particular o que se observou na exposição Queermuseu - Cartografias da Diferença na Arte Brasileira, ocorrida no Centro Cultural Santander-Porto Alegre em 2017. Neste caso, diante de acusações infundadas de “pedofilia”, “zoofilia”, “blasfêmia”, o banco patrocinador decidiu cancelar a exposição. Pretende-se sustentar que ambos fenômenos não são isolados, mas estão articulados em uma “cultura iconoclasta” de fundo religioso que domina certos setores da sociedade brasileira. Como marco teórico, evoca-se particularmente o livro L'image peut-elle tuer? no qual a autora Marie-José Mondzain retorna aos debates iconoclastas em Bizâncio para pensar a circulação das imagens na contemporaneidade.
/des/aparecer: histórias de imagens, fantasmas e espelhos
Authors: Junqueira dos Santos Carolina
Published: January 2019

Tomando como eixo a instalação Identidad, exposta em Buenos Aires em 1998, pensaremos as imagens como fantasmas em permanente aparição e desaparição. A instalação, idealizada pelo Centro Cultural Recoleta em parceria com as Abuelas de Plaza de Mayo, foi uma das estratégias para trazer à luz um evento obscuro da era ditatorial: o roubo de filhos de desaparecidos. Entre retratos e espelhos, vemos o aparecer e o desaparecer dos corpos – corpos presentes, ausentes, esperados. O espelho guarda a possibilidade latente de refletir o rosto do filho perdido, também o nosso próprio rosto, como se cada espectador pudesse ser, ele mesmo, aquilo que se busca. Se os velhos retratos nos afirmam o passado, o espelho evoca o presente – o nosso corpo presente – e o dever moral de jamais nos esquecermos.
DESAIN DAN IMPLEMENTASI AUTOMATIC VIDEO CAPTIONING DENGAN SPEECH RECOGNITION MENGGUNAKAN HIDDEN MARKOV MODEL
Authors: Dimasatria Rama , Virgono Agus , R. Rumani M. R. Rumani M.
Published: January 2019

Seiring perkembangan teknologi informasi, proses belajar-mengajar semakin banyak menggunakan media alternatif. Salah satu media pembelajaran alternatif yang digunakan adalah video. Untuk mempermudah pemahaman, biasanya video pembelajaran dilengkapi dengan caption atau teks keterangan tentang apa yang dibicarakan oleh pembicara. Akan lebih menghemat waktu dan energi apabila caption dihasilkan secara otomatis berdasarkan apa yang diucapkan pembicara. Oleh karena itu pada penelitian kali ini akan dibangun sistem Automatic Video Captioning menggunakan teknologi Speech Recognition. Sinyal suara dari video masukan diekstrak dan diproses dengan sistem speech recognition untuk menghasilkan teks yang sesuai. Pada penelitian ini sistem speech recognition dibangun dengan Linear Predictive Coding untuk ekstraksi ciri dan Hidden Markov Model untuk pencocokan ciri. Teks yang dihasilkan dari sistem speech recognition tersebut kemudian digunakan sebagai caption dari video masukan. Pengujian sistem dilakukan dengan mengubah-ubah jumlah data latih dan parameter HMM yaitu jumlah state dan jumlah cluster untuk mencari parameter dengan akurasi paling optimal. Dari hasil pengujian, didapatkan akurasi tertinggi sebesar 75,50% pada jumlah state 6, jumlah cluster 256, dan data latih sebesar 90 untuk setiap suku kata dalam database.Kata Kunci: automatic video captioning, speech recognition, Linear Predictive Coding (LPC), Hidden Markov Model (HMM)
DESAIN DAN IMPLEMENTASI KONTROL KESEIMBANGAN KENDARAAN RODA DUA DENGAN KONTROL LOGIKA SAMAR MENGGUNAKAN MIKROKONTROLER
Authors: Gutama Bonaventura Dhimas
Published: January 2019

Pada penelitian ini dilakukan pengontrolan keseimbangan kendaraan roda dua dengan memanfaatkan momentum sudut pada gyroscope. Penentukan kemiringan gyroscope dilakukan dengan teknik pengontrolan logika samar untuk mengatur gerak servo. Sensor yang digunakan adalah accelerometer yang sinyal keluarannya telah diperbaiki oleh estimator filter Kalman. Semua proses dijalankan dengan menggunakan mikrokontroler STM32F4. Masukan pengontrol logika samar adalah nilai error dan delta error. Nilai error merupakan selisih pembacaan sensor dengan nilai set point, sedangkan delta error adalah selisih error saat ini dengan error sebelumnya. Pengambilan keputusan dilakukan dengan metode Mamdani Inference System dan Weight Average Defuzzification. Prototipe yang telah dibuat telah berhasil mempertahankan posisi tegaknya dengan kemiringan hingga � 5o.Kata Kunci: kontrol keseimbangan, logika samar, STM32F4, filter Kalman, gyroscope
PEMETAAN KONTUR LINGKUNGAN PADA MOBILE ROBOT MENGGUNAKAN WIIMOTE
Authors: Saputra Randy Erfa
Published: January 2019

Navigasi merupakan kemampuan dasar yang harus dimiliki oleh mobile robot sebelum dapat melaksanakan tugasnya dan pemetaan merupakan hal yang utama dalam permasalahan navigasi. Robot memerlukan peta sebagai dasar pengetahuan dari lingkungannya serta sensor-sensor yang berfungsi untuk mengenali keadaan lingkungannya. Pada penelitian ini dirancang sebuah sistem untuk membuat kontur lingkungan dengan memanfaatkan Wiimote pada mobile robot. Output yang dihasilkan berupa plot tiga dimensi dari titik-titik (x, y, z) yang diperoleh dari kontur permukaan yang dilewati robot, dengan mengimplementasikan perangkat lunak untuk komunikasi data antara laptop dengan Wiimote dan mobile robot, serta melakukan perhitungan untuk menentukan keadaan kontur lingkungan. Hasil yang diperoleh adalah sistem dapat membuat peta kontur lingkungan yang mendekati keadaan lingkungan yang sebenarnya dengan akurasi rata-rata sebesar 93%.Kata kunci: Wiimote, accelerometer, mobile robot, kontur
DETEKSI KUALITAS DAN KESEGARAN TELUR AYAM RAS BERDASARKAN DETEKSI OBJEK TRANSPARAN DENGAN METODE GREY LEVEL CO-OCCURRENCE MATRIX (GLCM) DAN KLASIFIKASI K-NEAREST NEIGHBOR (KNN)
Authors: Salsabiilaa Rizka Kaamtsaalil
Published: January 2019

Telur adalah salah satu bahan pangan yang mudah dan lazim dijumpai di masyarakat Indonesia. Selain harganya murah, telur merupakan sumber nutrisi penting bagi kesehatan tubuh. Namun telur memiliki kualitas dan kesegaran yang berbeda-beda tergantung pada lingkungan penyimpanan dan kondisi induknya. Kesegaran telur dapat diketahui dari ketebalan dan kekentalan putih telurnya. Semakin tinggi putih telur semakin segar telur tersebut. Tebal atau tinggi albumen dapat diketahui dari nilai HU (Haugh Unit). Dalam makalah ini penulis membahas mengenai cara mendeteksi kualitas dan kesegaran telur menggunakan deteksi objek transparan dengan menggunakan metode GLCM (Grey Level Co-occurrence Method) dan klasifikasi KNN (K-Nearest Neighbor). Telur yang digunakan ialah telur ayam negeri. Pada penelitian ini dilakukan pengujian 51 citra telur, dengan komposisi masing-masing kelas memiliki 17 citra telur AA, 17 citra telur A, dan 17 citra telur B. Sehingga didapatkan akurasi terbaik sebesar 82.35% dengan menggunakan metode GLCM (Grey Level Co-occurrence Matrix) dengan parameter orde dua kontras, energy, korelasi, homogenitas dan arah sudut 45 pada jarak d = 1 dan kuantisasi yang digunakan adalah 8, dengan klasifikasi KNN (K-Neirest Neighbor) menggunakan jarak cosine pada K= 1.
PENGARUH LAJU ALIRAN UDARA TERHADAP HAMBATAN TERMAL HEAT SINK UNTUK PENDINGIN ELEKTRONIK
Authors: Ajiwiguna Tri Ayodha
Published: January 2019

Pengukuran hambatan termal dari lima jenis geometri heat sink berbeda untuk keperluan pendingin elektronik dilakukan pada penelitian ini. Sistem alat uji hambatan termal yang dibuat terdiri dari modul termoelektrik sebagai sumber panas, stainless steel sebagai material rujukan, dan kipas untuk memvariasikan laju aliran udara. Temperatur udara, bagian bawah dan atas material rujukan diukur dengan menggunakan termokopel tipe T. Laju aliran udara diatur sehingga memiliki nilai dari 0.06 sampai dengan 0.16 m3/s. Disipasi kalor diukur dengan menghitung laju aliran kalor konduksi yang terjadi pada material rujukan. Dari pengukuran tersebut, hambatan termal dari masing-masing heat sink kemudian dihitung dan dibandingkan dengan berbagai nilai laju aliran udara. Dari hasil yang didapatkan secara umum bahwa semakin besar laju aliran udara mengakibatkan menurunnya hambatan termal dari heat sink
PERANCANGAN DAN IMPLEMENTASI PROTOTIPE SISTEM KEAMANAN RUMAH MELALUI KOMBINASI KUNCI PINTU DAN PESAN SINGKAT BERBASIS MIKROKONTROLER
Authors: Hutahaean Christovan
Published: January 2019

Home security adalah kebutuhan wajib setiap pemilik rumah dalam menghindari dan meminimalisir tindakan kriminalitas berupa perampokan atau pembobolan rumah. Salah satu contoh sistem tradisional yang masih banyak digunakan adalah alarm rumah. Tetapi seiring dengan perkembangan teknologi saat ini sistem keamanan rumah semakin banyak jenisnya. Sistem keamanan rumah yang diterapkan melalui kombinasi pengunci prosedural dan menggabungkannya dengan menggunakan fitur pada ponsel yaitu SMS sangat diperlukan dan menguntungkan saat ini dan dilengkapi dengan fitur untuk mengatasi pengaksesan pintu rumah secara paksa oleh orang asing. Sistem ini juga dilengkapi fitur untuk memberikan notifikasi melalui ponsel dan bisa mengunci ataupun membuka pintu dari jarak jauh dengan mengirim SMS, sehingga apabila pemilik meninggalkan rumah dan lupa mengunci pintu, hal tersebut dapat diatasi dengan mudah dan efisien. Sistem yang dirancang memiliki 2 input, yaitu kode kombinasi dan pesan singkat (SMS). Mikrokontroler akan menerima informasi, baik dari kombinasi kode maupun pesan singkat (SMS). Kode kombinasi diterapkan melalui konsep Analog to Digital Converter (ADC) melalui perubahan tegangan oleh potensiometer dan hasilnya berupa digit yang ditampilkan di Liquid Crystal Display (LCD). Pesan singkat (SMS) diterapkan melalui pemanfaatan sistem SMS gateway melalui sebuah modul GSM. Hasil yang didapat dari penelitian ini adalah respon time sistem untuk mengirimkan notifikasi kepada pemilik rumah maupun nomor darurat saat pintu diakses melalui kode kombinasi adalah 2,2 - 2,3 detik dan melalui pesan singkat adalah 2,1 - 2,2 detik, serta saat rumah dibuka secara paksa (dibobol) adalah 7,729 detik.
FILTER BAND PASS MIKROSTRIP DENGAN STEPPED IMPEDANCE RESONATOR (SIR) UNTUK SYNTHETIC APERTURE RADAR (SAR) L-BAND
Authors: Fubian Narulita , Wijanto Heroe , Saputri Desti Madya
Published: January 2019

Filter pada teknologi synthetic aperture radar (SAR) digunakan untuk menghilangkan interferensi dan frekuensi lain yang tidak diinginkan pada saat modulasi. Hasil penginderaan yang baik dihasilkan oleh filter band pass yang dapat melewatkan frekuensi yang diinginkan dan memotong frekuensi yang tidak diharapkan. Oleh karena itu, pada penelitian ini filter dirancang dengan selektivitas yang tinggi, yakni pada frekuensi 1,27 GHz dengan lebar pita sebesar 10 MHz. Rancangan resonator yang digunakan adalah stepped impedance resonator (SIR) yang berbentuk ring kotak karena dapat menghasilkan lebar pita yang sempit. Bahan yang digunakan untuk implementasi filter ini adalah duroid RT-5880 dengan konstanta dielektrik 2,2. Hasil perancangan menunjukkan bahwa respon frekuensi pada 1,27 GHz memiliki nilai return loss (S11) -19,95 dB dan nilai insertion loss (S21) -0,97 dB. Untuk lebar pita pada rentang frekuensi 1,265-1,275 GHz didapatkan nilai S11 dan S21 secara berurutan sebedar -15,54 dB dan -0,99 dB serta -14,68 dB dan -1,09 dB.
PERANCANGAN DAN REALISASI PERANGKAT PANCAR-TERIMA FM-DIRECT SEQUENCE SPREAD SPRECTRUM PADA FREKUENSI 40 MHz
Authors: Andriana Andi , Wijanto Heroe , Budianto Budianto
Published: January 2019

Penelitian ini telah menghasilkan perangkat pancar-terima FM-DSSS (Frequency Modulation � Direct Sequence Spread Spectrum). Pemancar meliputi LPF 4 kHz, proses modulasi FM Pita Sempit berlebar pita 8 KHz pada frekuensi pembawa 40 MHz, sinyal pembawa termodulasi frekuensi mengalami penebaran ke lebar pita 2 MHz oleh sinyal kode acak semu, daya pemancar 1,37 Watt. Sedangkan perangkat penerima FM-DSSS meliputi pre-amplifier, balance modulator, Phase Lock Loop (PLL) dan penerima FM Super-heterodyne konversi ganda pada frekuensi IF 455 kHz. Processing Gain sistem ini diperoleh sebesar 261,1 atau 24,16 dB. Dari hasil pengujian, sistem FM-DSSS ini mampu bekerja pada lingkungan jamming setelah menurunkan levelnya dengan cara menebarkan pada bandwidth cukup lebar.Kata kunci : sistem transceiver FM-DSSS, FM Pita Sempit, PLL, penerima FM super-heterodyne
APROKSIMASI PAD� DAN PENERAPANNYA PADA ANALISIS PERFORMANSI DETEKSI RADAR
Authors: Saepudin Deni , Sidarto Kuntjoro Adji
Published: January 2019

Aproksimasi Pad� adalah suatu teknik aproksimasi dengan menggunakan fungsi rasional. Dalam beberapa hal, teknik ini memberikan hasil yang lebih baik dibandingkan dengan teknik aproksimasi dengan menggunakan polinom Taylor yang biasanya lebih dikenal. Dalam paper ini, aproksimasi Pad� digunakan untuk mengaproksimasi fungsi pembangkit momen dari suatu fungsi densitas di sekitar titik asal. Dengan menggunakan invers transformasi Laplace, aproksimasi fungsi densitas dapat diperoleh dan biasanya cukup baik untuk x yang cukup besar. Teknik aproksimasi ini diterapkan untuk menghitung threshold dan peluang deteksi pada deteksi radar bila nilai peluang false alarm diberikan.Kata kunci: aproksimasi Pad�, fungsi pembangkit momen, peluang false alarm, peluang deteksi