bluuebunny/crossref_metadata_2025 huggingface dataset:
SENSITIVITY ANALYSIS ON THE EFFECT OF MEASUREMENT NOISE AND SAMPLING FREQUENCY ON THE CALCULATION OF THE TEMPORAL LIGHT ARTEFACTS
Authors: Thorseth A. , Lindén J. , Bouroussis C.A.
Published: December 2021

Temporal light modulation (TLM) and the resulting temporal light artefacts (TLA) can cause problems with health and wellbeing for users of lighting products. Therefore, TLM has to be measured accurately and repeatably. This study investigates important factors influencing the measurement uncertainty of TLM measurements. The study shows how measurement uncertainty on central TLM parameters can have a significant effect on the calculation of TLA. Specifically, we show a linear relationship between DC offset and the expected error. Further we show severe effects of random noise on PstLM on certain waveforms. And lastly, we show a curious effect related to SVM of pulse width modulated signals and the measurement sampling frequency.
DEFINITION MODIFICATIONS FOR TEMPORAL LIGHT MODULATION (“FLICKER”)
Authors: Miller N.J. , Veitch J.A.
Published: December 2021

Terminology and concepts for temporal light modulation (TLM), commonly known as “flicker,” are defined and used inconsistently, even among researchers. A literature review by the authors has identified multiple meanings for multiple terms, so it is critical that a reader be able to translate from a single article’s definitions to a more universal set. A simple example is that “flicker” is used interchangeably as the stimulus as well as the response to the stimulus, as well as the direct visual response for a specific range of modulation frequencies. This paper endeavours to clarify communication among stakeholders so that effective metrics can be developed to limit unwanted physiological, psychological, behavioural, and cognitive responses to TLM. Changes to the CIE International Lighting Vocabulary are recommended.
LIGHTING CONDITIONS IN BRAZILIAN AND COLOMBIAN HOME OFFICES: A PRELIMINARY STUDY BASED ON OCCUPANT´S PERCEPTION
Authors: Amorim C.N.D. , Vásquez N.G. , Kanno J.R. , Matusiak B.
Published: December 2021

A measure to mitigate the spread of the COVID-19 virus during the first year of the pandemic was to stay home. Thus, working and learning activities have migrated to dwellings under the so-called home office scheme. In this context, exploring the lighting conditions in home offices from the occupant's perspective is vital for understanding the quality of the perceived visual environment at home. Based on data collected in Brazil and Colombia, this preliminary study aimed to investigate occupant’s perception of the luminous environment in home offices and the influence of regional and personal characteristics. This study is part of broader research related to Subtask A of IEA Task 61, "Integrated Solutions for Daylighting and Electric Lighting." Occupant's subjective assessments were collected from December 2020 to March 2021 through an online survey with professionals working from home. The results show that most professionals have an entire room for the home office, and these are more satisfied with the visual environment. In general, higher satisfaction was achieved when the lighting level was perceived as brighter and strong reflections were associated with disturbing glare situations. Most of the occupants perceived the light and colours as neutral. Daylight is more appreciated than artificial light. Participants located between 20°S and 34°S latitude were less satisfied with the visual environment in the home office. The first approach is part of comprehensive research, generating new data about lighting in home offices to subside guidelines for improving housing projects.
HOME OFFICE SURVEY IN THE SCOPE OF THE IEA SHC TASK 61, THE LIGHTING CONDITIONS FOR STUDENTS
Authors: Matusiak B.S. , Amorim C. , Sibilio S. , Martyniuk-Peczek J. , Sokol N. , Koga Y. , Debik J.
Published: December 2021

This paper has been developed in the IEA SHC Task 61 Integrated Solutions for Daylighting and Electric Lighting scope. Task 61 aims at developing and testing strategies and solutions combining daylighting, electric lighting, and the most suitable control systems. Some of the planned activities, especially in the Subtask A: User perspective and requirements, were not possible due to the Coronavirus pandemic restrictions. On the other side, new challenges emerged, for example, the migration of workplaces to homes. It occurred both for professionals and students, and the lighting conditions in these new improvised workplaces are unknown. In this context, the article presents the part of the home office survey aiming to understand lighting conditions for students in home offices in different countries: Brazil, Italy, Japan, Columbia, Denmark, and Poland. The paper also seeks to define the current limitations of a home office in providing a resilient visual environment.
sensLAB: TESTING MOTION AND PRESENCE SENSORS FOR SMART LIGHTING
Authors: Stuker F. , Rinderer F. , Blattner P.
Published: December 2021

For further efforts in saving energy in lighting installations, intelligent sensors are indispensable. Despite the fact such sensors are available precise and reproducible measurements of the coverage areas are missing. Therefore, METAS decided in 2020 to install the world's first manufacturer-independent fully automated measurement system to test passive infrared motion and presence sensors according to the recently published standard IEC 63180:2020. The test facility allows reproducible measurements of radial and tangential movements by moving different scaled and heated dummies on linear tracks. Furthermore, the presence detection can be measured with an automated robot arm. The test results are provided in a digital test report and the data is available in a machine-readable format to be further processed in designing and planning softwares.
TESTING THE PERFORMANCE FOR UNRELATED COLOUR APPEARANCE MODELS
Authors: Shi Keyu , Li Changjun , Gao Cheng , Ming Ronnier Luo
Published: December 2021

Most colour appearance models (CAMs) have been developed to predict the colour appearance only for related colours in different viewing conditions. More recently, CAMs to predict for unrelated colours have been proposed due to the availability of the experimental data. This paper investigates the performance of the three promising colour appearance models for unrelated colours, i.e. CAM15u, CAMFu and CAM20u using an experimental dataset carefully accumulated by Fu et al. in term of CV values. The results showed that the latest CAM20u outperformed the other models. CAMFu, as the oldest model, whose performance was much worse than other two models in predicting brightness and colourfulness, and performed well in predicting hue composition, while CAM15u gave a moderate performance in predicting brightness and colourfulness, but performed slightest worse than the others for hue composition.
EFFECTS OF LUMINOUS COLOUR SHIFT Duv ON COLOUR PREFERENCE
Authors: Koyama M. , Mochizuki E.
Published: December 2021

Subjective experiment was carried out to investigate the combined effect on the colour preference of the interior style, correlated colour temperature (CCT) and duv. Twenty university age subjects evaluated all 28 conditions with 2 types of the interior style, 2 levels of the CCT and 7 levels of the duv. This paper reports the measured results of the chromaticity shift of the interior surface due to duv and the perception of the colour difference between the condition with any other duv and that with duv0. Subjective evaluation on the colour preference of the entire space related to the interior style, CCT and duv is also summarized. It is concluded that the acceptable range of duv to be classified as the same CCT should be reconsidered, considering colour preference.
A STUDY ON THE DIFFERENCES IN VISION BETWEEN THE YOUNG AND THE ELDERLY IN SIGNS
Authors: Ishihara M. , Suzuki K. , Heo J.
Published: December 2021

It has been shown that with aging, cataracts become cloudy and colour perception and visual acuity deteriorate. As the world's population ages, there is a need for signage that considers older people's visual characteristics. This study aimed to clarify the effects of sign components on visual perception and identify differences in the effects of age. We conducted a psychological evaluation using the semantic differential method on 20 young and 10 elderly. The results showed that the younger participants gave higher ratings to many questions than the older participants. The factor analysis results showed that the items of the questionnaire consisted of a "visibility factor" and "harmony factor". The elderly were more likely to be affected by the viewing distance than the young invisibility.
RISKS IN THE VISUAL ENVIRONMENT SUCH AS GLARE, ILLUMINANCE AND LUMINANCE RATIO - RISK ASSESSMENTS MADE WITH VISUAL ERGONOMICS RISK ASSESSMENT METHOD, VERAM– A DESCRIPTIVE PAPER
Authors: Hemphälä H. , Glimne S. , Heiden M. , Lindén J. , Lindberg P. , Nylén P.
Published: December 2021

The visual environment has an impact on subjective strain and headaches. A visual ergonomics risk assessment method, VERAM, was used on 217 workplaces, and consists of both of a subjective questionnaire and an objective risk assessment, the latter risks are presented in this paper. The risk for daylight was assessed to be yellow (moderate risk) or red (high risk) at 53% of the workplaces and the risk for glare was yellow or red at 66%. The assessment of the lighting design showed a yellow or red risk at 44% of the workplaces and the illuminance was assessed to be insufficient at 49% of the workplaces. Flicker or TLM (temporal light modulation) was assessed to be a problem among 33%. These results show that the design of the visual environment is in most cases not performed in a satisfying way. The visual environment is essential to increase wellbeing, health and performance.
SUBJECTIVE EVALUATION OF VISUAL COMPLEXITY, CLARITY, AND PREFERENCE OF INDOOR ENVIRONMENTS
Authors: Wang Y. , Durmus D.
Published: December 2021

Visual comfort, task performance, and observers’ satisfaction is affected by the dynamic nature of visual perception and cognition. The perceived quality of the visual environment can be investigated in terms of visual complexity, visual clarity, and visual preference. This paper investigates the relationship between visual preference, visual clarity, visual complexity, colourfulness and the effect of spatial characteristics of images on the perceived quality of indoor environments. A visual experiment is conducted to assess the accuracy of image quality metrics in estimating the visual complexity, visual clarity, visual preference, and colourfulness of 50 images of indoor environments. Seven image quality assessment measures were used to estimate observers’ subjective evaluations. Results indicate that image colourfulness metric M correlates statistically significantly with visual preference and perception of colourfulness. Visual complexity correlated with five of the metrics. Future research will investigate wide range on images, including human-made and outdoor scenes.
LUMINOUS ENVIRONMENT IN OFFICE BUILDINGS: QUALITY OF LIGHTING AND USER'S OPINION
Authors: de Lacerda Bukzem Flávia , Naves David Amorim Cláudia , Dantas de Medeiros Ayana
Published: December 2021

Lighting quality is a concept that allows excellent vision while providing high comfort. In addition to standards, there are diverse methods that can assist in understanding the light quality of an environment and one such mechanism is monitoring protocols. The aim of this paper is to investigate the lighting quality in office buildings with good integrated design and/or daylighting design in Brazilian context, combining monitoring protocol and user opinion. Two office buildings were evaluated: Ministry of Mines and Energy (MME) in Brasília and the Support Centre for Technological Development of the University of Brasilia (CDT/UnB). Both case study shows good results to photometry parameters as illuminance average, directionality, quality of view out and melanopic values. The opinions of users, in general, are positive and the aligning with on-site measurements.
A LABORATORY STUDY ON VISUAL AND EMOTIONAL COMFORT EVALUATION OF LED WIDE BEAM ANGLE LAMPS : TAKING 3000K/ 4000K / 5000 K LINEAR LAMPS AS RESEARCH OBJECT
Authors: Feng Kai , Hao Luoxi , Dai Shujian
Published: December 2021

LED wide beam angle lamps have been widely used but might leading to glare or light pollution easily than traditional floodlighting lamps. Standards for wide beam angle products is not enough and a laboratory experiment was carried out in which visual and emotional comfort was used as evaluation items. 3 linear lamps (3000K/4000K/5000K) were used to evaluate emotional and visual comfort changes by performing different brightness or dynamic speed. Results showed that both brightness and dynamic speed could lead to negative feelings while emotional discomfort always occurs behind the eye’s discomfort. A higher brightness could leading to more negative evaluations, while some people think that medium brightness gives a more comfort feeling. A faster speed leads to more negative evaluation while some subjects prefer a medium speed (both in shading and erasure situations); In different lighting scenes, the significance of different indicators is different.
THE IMPACT OF COLOURFUL AND DYNAMIC LED MEDIA FACADE AND BILLBOARDS ON ASTRONOMICAL OBSERVATIONS
Authors: Lau Steve , Kyba Christopher , Wainscoat Richard J.
Published: December 2021

More and more LED media façades and LED billboards are being installed on architecture and buildings in order to decorate city skylines or to deliver advertisements. The shopping malls in the busiest streets in city centers make extensive use of LEDs to attract tourists and to promote the nighttime economy and business. In order to achieve the desired graphic and the display needed, these LED media façades and LED billboards utilize RGB LEDs or RBG white LEDs and a control system which emits a wide spectrum of light, including blue, green and red light. Although each of these colors contributes to skyglow via Rayleigh scattering, bluer colors of light are more efficiently scattered, and are of particular concern. The shift of the usage of conventional light sources like incandescent lamp, low pressure sodium and high pressure sodium light sources to this new type of colorful and dynamic LED media façade and billboards has brought new challenges to astronomers. This paper describes how the light emission from LED media façades and LED billboards increases the artificial skyglow in the atmosphere and more importantly how this brightening skyglow affects astronomical observations.
Pengaruh Pengalaman Kerja, Independensi, Obyektifitas, Integritas, dan Kompetensi terhadap Kualitas Audit pada BPKP Kantor Perwakilan Wilayah Jawa Timur
Authors: Arie Thalia Dhea , Sumadi
Published: December 2021

This study aims to examine the effect of work experience, independence, objectivity, integrity, and competence on the quality of audits produced by public sector auditors at BPKP East Java Regional Representative Office. This study uses quantitative methods with research instruments using questionnaires. The population of this study are public sector auditors who become Civil Servants (PNS) at BPKP East Java Regional Representative Office. Determination of the sample with the criteria that the auditor has attended the Auditor Functional Position Education and Training (JFA). Analysis of research data using multiple linear regression. The results showed that the independence, integrity, competence of public sector auditors had no effect on audit quality. While the variables of Work Experience, Objectivity affect the quality of audits produced by public sector auditors at BPKP East Java Regional Representative Office.
Faktor-Faktor Yang Mempengaruhi Produktivitas Tenaga Kerja PTPN X (PERSERO) Kebun Kertosari Jember
Authors: Hermawan Dwi Cahyo , Dhamayanthi Wenny , Ambarkahi Ratih Puspitorini Yekti
Published: December 2021

Penelitian ini dilatarbelakangi karena Indonesia merupakan salah satu negara penghasil tembakau terbesar keenam didunia, dimana terdapat beberapa kota yang terkenal dengan produksi tembakaunya yaitu seperti di Jember.Di jember terdapat beberapa gudang tempat pengolahan tembakau diantaranya terdapat di PTPN X (PERSERO) Kebun Kertosari Jember.Pada penelitian ini bertujuan untuk mengetahui pengaruh motivasi, kompensasi dan lingkungan kerja terhadap produktivitas tenaga kerja bagian sortasi di PTPN X (PERSERO) Kebun Kertosari Jember. Metode yang digunakan yaitu observasi, kuisioner, wawancara dan studi literatur. Jumlah responden yang dijadikan sampel yaitu sebanyak 98 orang. Teknik analisis yang digunakan yaitu uji validitas dan reliabilitas, uji asumsi klasik, regresi linier berganda, analisis determinasi, uji F dan uji t dengan menggunakan alat analisis SPSS 22.0 for windows. Hasil pengujian diketahui bahwa (1) variabel motivasi (X1), kompensasi (X2) dan lingkungan kerja (X3) secara serempak berpengaruh signifikan terhadap produktivitas (Y). (2) variabel motivasi (X1), kompensasi (X2) dan lingkungan kerja (X3) secara parsial berpengaruh signifikan terhadap produktivitas (Y). (3) Variabel yang berpengaruh dominan terhadap produktivitas tenaga kerja (Y) di PTPN X (PERSERO) Kebun Kertosari Jember adalah variabel lingkungan kerja (X3).
Estimate the Memory Bounds Required by Shared Variables in Software Transactional Memory Programs
Authors: Ngoc Khai Nguyen , Hoang Truong Anh , Hanh Dang Duc
Published: December 2021

Estimating memory required by complex programs is a well-known research topic. In this work, we build a type system to statically estimate the memory bounds required by shared variables in software transactional memory (STM) programs. This work extends our previous works with additional language features such as explicitly declared shared variables, introduction of primitive types, and allowing loop body to contain any statement, not required to be well-typed as in our previous works. Also, the new type system has better compositionality compared to available type systems.
Ultra-High-Throughput Multi-Core AES Encryption Hardware Architecture
Authors: Dong Pham Khoi , Nguyen Hung K , Hussin Fawnizu Azmadi , Tran Xuan Tu
Published: December 2021

Security issues in high-speed data transfer between devices are always a big challenge. On the other hand, new data transfer standards such as IEEE P802.3bs 2017 stipulate the maximum data rate up to 400 Gbps. So, security encryptions need high throughput to meet data transfer rates and low latency to ensure the quality of services. In this paper, we propose a multi-core AES encryption hardware architecture to achieve ultra-high-throughput encryption. To reduce area cost and power consumption, these cores share the same KeyExpansion blocks. Fully parallel, outer round pipeline technique is also applied to the proposed architecture to achieve low latency encryption. The design has been modelled at RTL (Register-Transfer-Level) in VHDL and then synthesized with a CMOS 45nm technology using Synopsys Design Compiler. With 10-cores fully parallel and outer round pipeline, the implementation results show that our architecture achieves a throughput of 1 Tbps at the maximum operating frequency of 800 MHz. These results meet the speed requirements of future communication standards. In addition, our design also achieves a high power-efficiency of 2377 Gbps/W and area-efficiency of 833 Gbps/mm2, that is 2.6x and 4.5x higher than those of the other highest throughput of single-core AES, respectively.