Pub Date : 2018-09-01DOI: 10.1109/lumenv.2018.8521067
P. Arató
The security of computer networks is a prime concern today. Different devices and methods have been developed to offer different kinds of protection (firewalls, IDS’s, antiviruses, etc.). By centrally storing and processing the signals of these devices, it is possible to detect more cheats and attacks than simply by analyzing the logs independently. To be able to discover every attack we have to set the sensitivity of the security devices to a high level. The most difficult and still unsolved problem in this case is that vast numbers of alarm messages are generated and the most of them do not indicate real attack. In this paper we show how we can use data mining to discover the patterns that frequently caused false alarm. We present algorithm ABAMSEP, which discovers frequent alert-ended episodes.
{"title":"Conference Chairman","authors":"P. Arató","doi":"10.1109/lumenv.2018.8521067","DOIUrl":"https://doi.org/10.1109/lumenv.2018.8521067","url":null,"abstract":"The security of computer networks is a prime concern today. Different devices and methods have been developed to offer different kinds of protection (firewalls, IDS’s, antiviruses, etc.). By centrally storing and processing the signals of these devices, it is possible to detect more cheats and attacks than simply by analyzing the logs independently. To be able to discover every attack we have to set the sensitivity of the security devices to a high level. The most difficult and still unsolved problem in this case is that vast numbers of alarm messages are generated and the most of them do not indicate real attack. In this paper we show how we can use data mining to discover the patterns that frequently caused false alarm. We present algorithm ABAMSEP, which discovers frequent alert-ended episodes.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"168 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123563402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8520989
M. Leśko, H. Wachta, K. Baran, A. Różowicz
The article presents an innovative concept of adaptive luminaire with variable luminous intensity distribution. It enables adjustment of photometric characteristic of luminaire to variable arrangement of the facility, including the quantitative regulation of luminous flux and spatial distribution. A solution presented in this paper was developed as part of a research project titled “Development of the Intelligent Light Distribution System SOLLS ACTIVE SKY” and is the subject of patent application. The authors present the results of simulation tests in terms of the possibility of obtaining different luminous intensity distribution and lighting parameters on the working plane, with variable position relative to the arrangement of the luminaires. The use of a luminaire with variable luminous intensity distribution as part of an adaptive lighting system allows for quick and cost-free introduction of changes in the lighting of selected functional zones inside the facility. It is possible to adjust the lighting in case of changes in the size or position of the working plane, while the position of luminaire is constant.
提出了一种具有可变光强分布的自适应灯具的创新概念。它可以根据设施的可变布置来调节灯具的光度特性，包括光通量的定量调节和空间分布。本文中提出的解决方案是作为“智能配光系统SOLLS ACTIVE SKY的开发”研究项目的一部分开发的，并且是专利申请的主题。作者给出了模拟试验的结果，说明了在不同位置的灯具布置下，在工作面上获得不同的光强分布和照明参数的可能性。使用可变光强分布的灯具作为自适应照明系统的一部分，可以快速和无成本地改变设施内选定功能区的照明。当工作平面的尺寸或位置发生变化时，可以调整照明，而灯具的位置是恒定的。
{"title":"A Concept of an Adaptive Luminaire with Variable Luminous Intensity Distribution","authors":"M. Leśko, H. Wachta, K. Baran, A. Różowicz","doi":"10.1109/LUMENV.2018.8520989","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8520989","url":null,"abstract":"The article presents an innovative concept of adaptive luminaire with variable luminous intensity distribution. It enables adjustment of photometric characteristic of luminaire to variable arrangement of the facility, including the quantitative regulation of luminous flux and spatial distribution. A solution presented in this paper was developed as part of a research project titled “Development of the Intelligent Light Distribution System SOLLS ACTIVE SKY” and is the subject of patent application. The authors present the results of simulation tests in terms of the possibility of obtaining different luminous intensity distribution and lighting parameters on the working plane, with variable position relative to the arrangement of the luminaires. The use of a luminaire with variable luminous intensity distribution as part of an adaptive lighting system allows for quick and cost-free introduction of changes in the lighting of selected functional zones inside the facility. It is possible to adjust the lighting in case of changes in the size or position of the working plane, while the position of luminaire is constant.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122181203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521093
J. Maziarka, L. Beňa, H. Wachta
This paper deals with the issues of meaning S/P factor of light sources in lighting of outdoor spaces. The first part describes the problem of photopic, scotopic and mesopic vision, as well as functions and activities of the human eye which define the meaning of the S/P factor lamps. The second part is dedicated to the measurement of luminous flux a selected light source used to lighting outdoor spaces, calculating S/P (scotopic/photopic) factor and ELF (Effective Luminance Factors) and finally to drawing conclusions from their measurements and calculations.
{"title":"Meaning of Scotopic/Photopic Ratio of Light Sources in Lighting of Outdoor Spaces","authors":"J. Maziarka, L. Beňa, H. Wachta","doi":"10.1109/LUMENV.2018.8521093","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521093","url":null,"abstract":"This paper deals with the issues of meaning S/P factor of light sources in lighting of outdoor spaces. The first part describes the problem of photopic, scotopic and mesopic vision, as well as functions and activities of the human eye which define the meaning of the S/P factor lamps. The second part is dedicated to the measurement of luminous flux a selected light source used to lighting outdoor spaces, calculating S/P (scotopic/photopic) factor and ELF (Effective Luminance Factors) and finally to drawing conclusions from their measurements and calculations.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"455 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115819618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/lumenv.2018.8520970
Tomas Maixner
In 1883, in the section Pickings of the journal Svetozor, the future professor Bedfich Katzer publishes his paper Luminosity of the Sun and the Moon. The text is interesting by dealing also with luxmeters. The paper presents the history of measuring illuminance since the days of Mr. Katzer to this day.
{"title":"Light Measuring - Since Rumford to This Day","authors":"Tomas Maixner","doi":"10.1109/lumenv.2018.8520970","DOIUrl":"https://doi.org/10.1109/lumenv.2018.8520970","url":null,"abstract":"In 1883, in the section Pickings of the journal Svetozor, the future professor Bedfich Katzer publishes his paper Luminosity of the Sun and the Moon. The text is interesting by dealing also with luxmeters. The paper presents the history of measuring illuminance since the days of Mr. Katzer to this day.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128077005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/lumenv.2018.8521160
P. Kępa
The use of dipped beam during the day is a substitute for the use of daytime running lights. In order to answer the question whether in photometric terms the dipped beam can replace the daytime running lights, a detailed photometric analysis had to be carried out. The article presents a comparison between two types of lights in the range of the required values of luminosity and the angular ranges of visibility to be replaced by dipped beam.
{"title":"Comparison of the Photometric Requirements for Dipped Beam as a Replacement for Daytime Running Lights","authors":"P. Kępa","doi":"10.1109/lumenv.2018.8521160","DOIUrl":"https://doi.org/10.1109/lumenv.2018.8521160","url":null,"abstract":"The use of dipped beam during the day is a substitute for the use of daytime running lights. In order to answer the question whether in photometric terms the dipped beam can replace the daytime running lights, a detailed photometric analysis had to be carried out. The article presents a comparison between two types of lights in the range of the required values of luminosity and the angular ranges of visibility to be replaced by dipped beam.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121310199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521001
R. Krupiński
The article presents a solution to the problem of work and time consuming of the objects floodlighting projects creation. Currently, the only technically correct methods for creating such projects are a three-dimensional computer simulation using photometric files of luminaires or field trials using real equipment. Both of these methods have their advantages, but also many disadvantages. Among architects, in turn, a popular method of floodlighting designing is graphic processing of daytime or evening images objects. The method is relatively fast and it gives photorealistic effects but it is technically incorrect. An architect or graphic designer creates a picture that is attractive to the eye, but usually has nothing to do with reality. This is due to the fact that the lighting parameters of both lighting equipment and analyzing this type of project in terms of technology are not taken into account. The article presents a solution to this problem. It describes a system created especially for this purpose based on a dedicated computer application that allows simulation of the object floodlighting using its daily photograph. This is technically correct simulation, because it uses photometric files of luminaires. The system allows correction of basic photometric parameters: editing of photometric files, luminous flux, light in different directions, color temperature and the use of color filters. The computer application also enables photo editing, geometric correction, measurement and defining reflection and transmission properties of materials from which the object is actually built. Full lighting analysis is also possible and is based on luminance and illuminance distributions generated in the false color scale and measurements in points and selected areas. The advantages, disadvantages and limitations of the developed system are presented.
{"title":"The Floodlighting Design System Based on the Object's Daytime Photography","authors":"R. Krupiński","doi":"10.1109/LUMENV.2018.8521001","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521001","url":null,"abstract":"The article presents a solution to the problem of work and time consuming of the objects floodlighting projects creation. Currently, the only technically correct methods for creating such projects are a three-dimensional computer simulation using photometric files of luminaires or field trials using real equipment. Both of these methods have their advantages, but also many disadvantages. Among architects, in turn, a popular method of floodlighting designing is graphic processing of daytime or evening images objects. The method is relatively fast and it gives photorealistic effects but it is technically incorrect. An architect or graphic designer creates a picture that is attractive to the eye, but usually has nothing to do with reality. This is due to the fact that the lighting parameters of both lighting equipment and analyzing this type of project in terms of technology are not taken into account. The article presents a solution to this problem. It describes a system created especially for this purpose based on a dedicated computer application that allows simulation of the object floodlighting using its daily photograph. This is technically correct simulation, because it uses photometric files of luminaires. The system allows correction of basic photometric parameters: editing of photometric files, luminous flux, light in different directions, color temperature and the use of color filters. The computer application also enables photo editing, geometric correction, measurement and defining reflection and transmission properties of materials from which the object is actually built. Full lighting analysis is also possible and is based on luminance and illuminance distributions generated in the false color scale and measurements in points and selected areas. The advantages, disadvantages and limitations of the developed system are presented.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128852863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521161
M. Gilewski
This paper describes the design of a replenishing adaptive lamp for closed crops. The new lamp compensates for solar radiation, which guarantees higher yields. Adaptability of the lamp also means a better adjustment of the lighting spectrum to a particular monoculture. Furthermore, changes in intensity light and spectral distribution of the lamp can keep up photoperiod concerned plant. Thus, it is possible to program the lighting system in accordance with a day and calendar cycle of cultivation. The system consists of: parallel LED sources, module measuring solar light and a wireless control device. The proposed lamp can be integrated in the network lighting.
{"title":"An Adaptive and Monoculture Oriented LEDs Lamp","authors":"M. Gilewski","doi":"10.1109/LUMENV.2018.8521161","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521161","url":null,"abstract":"This paper describes the design of a replenishing adaptive lamp for closed crops. The new lamp compensates for solar radiation, which guarantees higher yields. Adaptability of the lamp also means a better adjustment of the lighting spectrum to a particular monoculture. Furthermore, changes in intensity light and spectral distribution of the lamp can keep up photoperiod concerned plant. Thus, it is possible to program the lighting system in accordance with a day and calendar cycle of cultivation. The system consists of: parallel LED sources, module measuring solar light and a wireless control device. The proposed lamp can be integrated in the network lighting.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134472453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521111
J. Skoda, Martin Motyčka
This article describes lighting system design using ray tracing. This method can be applied in cases where calculation includes non-diffuse reflective materials, light sources have dimensions comparable to distances from reflective materials and also in case where diffused reflective surfaces influence each other in terms of distribution of light.
{"title":"Lighting Design Using Ray Tracing","authors":"J. Skoda, Martin Motyčka","doi":"10.1109/LUMENV.2018.8521111","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521111","url":null,"abstract":"This article describes lighting system design using ray tracing. This method can be applied in cases where calculation includes non-diffuse reflective materials, light sources have dimensions comparable to distances from reflective materials and also in case where diffused reflective surfaces influence each other in terms of distribution of light.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133731356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521150
A. Pawlak
The first part of the paper discusses the positive and negative effects of blue light on humans. Then, the paper presents standardized methods of evaluation of potential hazards related to optical radiation emitted by light sources and a diagram of classification of light sources in terms of photobiological hazard. The methods covered in the standard EN 62471 and in the technical report IEC TR 62778:2014 constitute a breakthrough in treating light sources and luminaires as factors that may be significantly harmful to human health in certain conditions. These documents contain explanations and guidelines on evaluating the hazard from blue light emitted by lighting products which mainly emit optical radiation in the visible spectrum. Based on the measurements of photobiological safety based on methods described in the standard EN 62471 we can obtain information about a product and can assign it to one of the four hazard groups. Then, the paper presents the results of blue radiation measurements for the selected types of LED sources, especially those emitting cold colour of light. This is followed by a summary list of blue light hazard for three LED sources - emitting warm, neutral and cold colour of light. Conclusions concerning the safety of use of LED sources were drawn on the basis of analysis of normative documents and results of measurements.
{"title":"Evaluation of the Hazard Caused by Blue Light Emitted by LED Sources","authors":"A. Pawlak","doi":"10.1109/LUMENV.2018.8521150","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521150","url":null,"abstract":"The first part of the paper discusses the positive and negative effects of blue light on humans. Then, the paper presents standardized methods of evaluation of potential hazards related to optical radiation emitted by light sources and a diagram of classification of light sources in terms of photobiological hazard. The methods covered in the standard EN 62471 and in the technical report IEC TR 62778:2014 constitute a breakthrough in treating light sources and luminaires as factors that may be significantly harmful to human health in certain conditions. These documents contain explanations and guidelines on evaluating the hazard from blue light emitted by lighting products which mainly emit optical radiation in the visible spectrum. Based on the measurements of photobiological safety based on methods described in the standard EN 62471 we can obtain information about a product and can assign it to one of the four hazard groups. Then, the paper presents the results of blue radiation measurements for the selected types of LED sources, especially those emitting cold colour of light. This is followed by a summary list of blue light hazard for three LED sources - emitting warm, neutral and cold colour of light. Conclusions concerning the safety of use of LED sources were drawn on the basis of analysis of normative documents and results of measurements.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115523405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521116
P. Becak, T. Novák, Richard Baleja, K. Sokanský
The article focuses on the further verification of the software goniophotometer in the BUILDING DESIGN computational program in terms of the possibility of calculating the radiation of the liminous flux flowing into the upper half-space from public lighting systems [1]. Software goniophotometer was tested by the previous verification for the accuracy of calculations of the direct and indirect component of luminaire luminous flux. The superstructure was conceived as the possibility of inserting a network of calculating points in the shape of a sphere. We can imagine the points showing normal illuminance towards the centre of the sphere as a lux meter sensor. The system thus designed duplicates the function of a real goniophotometer, a photometric laboratory instrument that measures luminous intensity or luminous intensity curves. The principle of a goniophotometer is that it allows to measure the luminous intensity in different planes and at different angles, which can be easily interpreted by a sphere with a network of calculation points. The density of the calculation points can be entered in an angular step according to the standard luminaire measurement plan C, y. The goal of implementing such a network of calculation points is to extend the possibilities of a computational program for modelling the luminous intensity curves of existing luminaires as well as newly composed luminaires. The main goal is calculating the radiation of the liminous flux flowing into the upper half-space from the outdoor lighting systems. It will be the basis for further astronomical calculations that focus on distracting light and increased sky luminance. Based on the testing, it will be possible to create model of lighting system in some city or district of the city by inserting LDT data of real luminaires, thus creating a real lighting system with real building models. From the resulting model, it will be possible to quantify the proportion of the direct and indirect luminous flux flowing into the upper half-space.
{"title":"Radiation of the Luminous Flux Into the Upper Half-Space in Wils - Building Design","authors":"P. Becak, T. Novák, Richard Baleja, K. Sokanský","doi":"10.1109/LUMENV.2018.8521116","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521116","url":null,"abstract":"The article focuses on the further verification of the software goniophotometer in the BUILDING DESIGN computational program in terms of the possibility of calculating the radiation of the liminous flux flowing into the upper half-space from public lighting systems [1]. Software goniophotometer was tested by the previous verification for the accuracy of calculations of the direct and indirect component of luminaire luminous flux. The superstructure was conceived as the possibility of inserting a network of calculating points in the shape of a sphere. We can imagine the points showing normal illuminance towards the centre of the sphere as a lux meter sensor. The system thus designed duplicates the function of a real goniophotometer, a photometric laboratory instrument that measures luminous intensity or luminous intensity curves. The principle of a goniophotometer is that it allows to measure the luminous intensity in different planes and at different angles, which can be easily interpreted by a sphere with a network of calculation points. The density of the calculation points can be entered in an angular step according to the standard luminaire measurement plan C, y. The goal of implementing such a network of calculation points is to extend the possibilities of a computational program for modelling the luminous intensity curves of existing luminaires as well as newly composed luminaires. The main goal is calculating the radiation of the liminous flux flowing into the upper half-space from the outdoor lighting systems. It will be the basis for further astronomical calculations that focus on distracting light and increased sky luminance. Based on the testing, it will be possible to create model of lighting system in some city or district of the city by inserting LDT data of real luminaires, thus creating a real lighting system with real building models. From the resulting model, it will be possible to quantify the proportion of the direct and indirect luminous flux flowing into the upper half-space.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117232852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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