bluuebunny/crossref_metadata_2025 huggingface dataset:
VALIDATION OF DIURNAL CIRCADIAN LIGHTING ACCUMULAITON MODEL BASED ON A LIGHT HABIT SURVEY OF 448 CHINESE PARTICIPANTS
Authors: Hou D.
Published: January 2024

The quantification of the impact of light on the human circadian phase is currently a bottleneck in achieving precise regulation of circadian rhythm through light. The Diurnal Circadian Lighting Accumulation (DCLA) model is a novel predictor of human circadian phase shift (CPS), developed based on diurnal light exposure characteristics such as timing, duration, and the ipRGC-based light dose. In this study, the DCLA-CPS model is validated through an online light habits survey involving 448 Chinese participants. The survey includes subjective CPS assessment and inquiries about daylight exposure, artificial lighting, and visual display terminal usage. The light habits are quantitatively translated into corresponding spectra and intensities, which are then inputted into the DCLA-CPS model to calculate the predicted CPS. The results indicate that the model accurately predicts the CPS direction, and there is a significant correlation between the predicted vector CPS and subjective CPS with R2 = 0.7884 (p < 0.05).
NEUROPHYSIOLOGY-BASED EVALUATION METHOD IN LIGHTING ENVIRONMENT FOR BRIGHTNESS PERCEPTION OF SIMPLE TARGETS
Authors: Inoue S. , Shida H. , Yoshizawa N. , Takase K.
Published: January 2024

Recently, neurophysiology-based models have been received attention as a highly accurate and versatile method for estimating visual qualities, such as visibility, brightness, and glare. In this study, based on previous studies on classical filling-in models, we introduce a new model that incorporates the flow of visual information processing related to brightness from the retina to the primary visual cortex (V1) and beyond, then, verify the validity of this algorithm through subjective evaluation in a laboratory. We conducted an experiment using targets with a smooth luminance gradation, which differ in central luminance, luminance contrast, and viewing angles. The simple linear regression analyses were applied between the participants’ evaluations and the brightness perception values calculated using this algorithm, and a high coefficient of determination was obtained. Thus, the experiments confirmed the usefulness of the examined brightness perception algorithm evaluating bright and dark conditions.
THE MEASUREMENT UNCERTAINTY OF THE IMAGING LUMINANCE MEASUREMENT DEVICES
Authors: Motyčka M. , Škoda J. , Novák F. , Baxant P.
Published: January 2024

An imaging luminance measuring device (ILMD) is capable of simultaneous luminance measurement in every pixel of captured image. A conventional luminance meter only measures average luminance in defined viewing angle. An imaging luminance measuring device offers more flexibility and complexity to the luminance analysis of region of interest. However, these devices require complex hardware and software calibration and the uncertainty analysis is therefore more difficult than in case of a conventional luminance meter. In this article a reader learns about the estimation of measurement uncertainties of imaging luminance measurement devices based on the digital camera. Expanded uncertainty in luminance measurement depends on settings of a digital camera and is not uniform across the image. Therefore, 3D functions are chosen for best representing of expanded uncertainty.
PROBLEMS OF MODERN LED LIGHT SOURCES PHOTOMETRIC MEASUREMENTS
Authors: Nikanenka S. , Kreidzich A. , Jaskov A.
Published: January 2024

In article the problems of determining the distance during photometric measurements of the optical characteristics of LEDs considers. To solve this problem, it is proposed to use a device based on the parallax method. A device for determination of light center of optical radiation source with a complex form of the radiating surface on base parallax method has been developed. The device also allows to determine the measurement distance between light center of radiation source and the aperture of the photodetector.
INVESTIGATING THE FRAME ASSEMBLY ISSUES OF NEAR-FIELD GONIOPHOTOMETERS USING A VIRTUAL INSTRUMENT AND THE MONTE CARLO METHOD
Authors: Pizág B. , Nagy B.
Published: January 2024

The requirements for characterizing light sources in the near field are presently defined in relation to the results' convertibility to far-field distributions. Such transformations, however, hide several properties of the original dataset. The paper describes such details of the luminance dataset and presents a simulated model for their evaluation using the Monte Carlo method.
The simulated model represents a simplified near-field goniophotometer based on a pinhole camera projecting rays to a spherical surface. The light source is simulated using parametric functions in relation to the rays' point and angle of incidence. This structure allows the construction of various datasets with different constructions and configurations.
This paper presents various approaches to determine the accuracy of sampling and assembly of the luminance in a single point of the emitting surface.
PROPOSAL OF MAINTENANCE MANAGEMENT METHOD FOR ROAD LIGHTING FACILITIES USING UNMANNED AERIAL VEHICLES
Authors: Takahashi Y. , Kohko S. , Sagane Y. , Fujimoto K. , Kurosawa M. , Hama Y. , Hagiwara T.
Published: January 2024

In recent years, light-emitting diode (LED) lamps have become the mainstream light source for road lighting because of their high efficiency and long life. Unlike high-intensity discharge lamps, LEDs do not stop lighting at the end of their service life but continue emitting light with a decreased luminous flux. For this reason, it is important for road lighting that uses LEDs to regularly check if the road surface luminance is maintained according to the relevant performance index. If measurement of road surface illuminance using an unmanned aerial vehicle (UAV) is realized, the time required for illuminance measurement can be reduced, which may reduce the traffic control hours and the burden on road users, such as detours and traffic congestion caused by traffic control. This study examined whether road surface illuminance photometry using UAVs can be used for maintenance and management of road lighting facilities.
OBSERVATION OF ADAPTED WHITE UNDER DIFFERENT STATES OF CHROMATIC ADAPTATION
Authors: Urbin Á.
Published: January 2024

The objective of this pilot study was to observe adapted white under different coloured lights and different fields of view. Subjects had to adjust chromaticity on a digital display to set neutral chromaticity under different states of chromatic adaptation in coloured environments provided by a spectrally tuneable light booth.
Based on former experiments, nine chromaticities were defined in the experimental design: a white point as a reference and four chromaticity pairs. Twenty-six normal colour observers performed the tests in all nine environments with unaided eyes and wearing special glasses, limiting their field of view to approximately 70°.
Results were evaluated in the CIE 1976 UCS diagram. The standard deviation and the distribution of the neutral settings were analysed based on the area and the orientation of ellipses fitted to the data with the least squares method.
Based on the evaluated data, the significance of the aperture was not explicitly relevant. However, there were differences in the distances of the ellipses from the adapting axes and the angles between the orientations of the fitted and adapting axes. Sensitivity in the blue-yellow direction appears lower, as the standard deviation was higher than that in the red-green direction.
The initial results indicate the effect of the adapting chromaticity on the adapting shift and the degree of chromatic adaptation.
PSYCHOLOGICAL AND PHYSIOLOGICAL ANALYSIS ON THE EFFECT OF PEACEFULNESS OF MIZUKAGE VIDEOS
Authors: Yu H. , Akita T. , Sano N.
Published: January 2024

The purpose of this study is to confirm the psychological evaluation according to Mizukage's fluctuation period and viewing angle of Mizukage, and the effect on peacefulness according to changes in brain waves. In the first experiment, videos 1-6, evaluated as peaceful, and videos 1-2 evaluated as non-peaceful were extracted. Using these two videos in the second experiment, the psychological and physiological effects of peacefulness were investigated. It was found that a viewing angle of 5.7° × 9.2° had the most peacefulness for both videos 1-2 and 1-6. A narrow viewing angle has a large proportion of P3 and P4 α waves. Meanwhile, in viewing angle 9.2° × 5.7°, the ratio of the O2 θ wave was large. It was found that the viewing angle needs to be adjusted in order to obtain peacefulness with Mizukage because brain activity and subjective evaluation change depending on the viewing angle.
IMPACTS OF LED TEMPORALLY MODULATED LIGHT ON ATMOSPHERE PERCEPTION
Authors: Zhao X. , Li M. , Lin Y. , Xu W. , Hou D.
Published: January 2024

The introduction of LED lighting systems has raised concerns about stroboscopic effects caused by temporally modulated light. The visibility of stroboscopic effects can be predicted by the stroboscopic visibility measure (SVM). Existing studies on stroboscopic effects mainly focus on its effects on human health, while its impacts on atmosphere factors have been less studied. This study investigates the impact of stroboscopic visibility on atmosphere perceptions. 10 participants assessed lighting environments under 6 SVM conditions using 16-atmosphere terms. Factor analysis revealed 4 dimensions of atmosphere perception: cosiness, liveliness, lightness and blinking. A higher SVM level would lead to less cosiness, less liveness, less lightness and more blinking. ANOVA analysis demonstrated a significant relationship between the SVM level and the blinking perception, following a logistic function with a threshold of SVM = 1,24. Further studies are needed but the effect should be considered when designing practical lighting installations.
AN ENERGY EFFICIENT HUMAN CENTERED LIGHTING FOR OPEN PLAN OFFICES WITH COMFORT CRITERIA
Authors: Aliparast S. , Onaygil S.
Published: January 2024

In study two types, Direct Suspended Linear (DSL) and Direct and Indirect Suspended Linear (DISL) luminaires with dynamic height at daylight non access office proposed, to improve the Circadian Stimulus (CS) and Equivalent Melanopic Lux (EML) by focusing on working plane and occupants view direction. CS and EML measured in three height (H1, H2, H3) scenarios. DSL shows: EVH1:523 lux, EVH2:520 lux, EVH3:550 lux and EHH1:2026.25 lux, EHH2:870 lux, EHH3:752.5 lux. Accordingly, CSH1:0.3, CSH2:0.3, CSH3:0.31 and EMLH1:340.473, EMLH2:338.52, EMLH3:358.05. DISL shows: EVH1:420 lux, EVH2:393 lux, EVH3:400 lux and EHH1:1137.5 lux, EHH2: 520 lux, EHH3:521.5 and CSH1:0.321, CSH2:0.3, CSH3:0.311 and EMLH1:303.24, EMLH2:283.746, EMLH3:288.8. The Wilcoxon Signed Rank Test showed the impact of DSL and DISL luminaires on occupants' comfort criteria. Energy-efficient lighting, targeting a CS of 0.3, reduced power consumption by 40%. Data evaluation with 10 participants confirmed that beam distribution influenced power consumption, EV, EH, and occupant satisfaction (p-value: 0.006).
THE CARBON FOOTPRINT OF LIGHTING RENOVATIONS OVER A TEN-YEAR USAGE PERIOD IN THE EU REGION
Authors: Marjamäki L. , Juslén H.
Published: January 2024

Carbon footprint is a useful measure for the comparison of products and solutions on the basis of their climate impact. In this study, a lifecycle analysis (LCA) was conducted to assess the carbon footprint for two lighting system and to provide insight over what lifecycle stages or components are most relevant.

The objective of this LCA study was to calculate the carbon footprint of two lighting renovation projects with wired and wireless solutions, measure the impact different factors may have had on it, and to determine which solution is the best option for reducing said footprint. The results show that the use stage is the most significant lifecycle stage due to electricity consumption over a 10-year period, if carbon neutral electricity is not available. The results also demonstrated that the cabling is another significant differentiator between wireless and wired solutions, when low or zero carbon electricity is employed.
LED LIFETIME TESTS FOR CIRCUIT SIMULATION MODELLING
Authors: Hegedüs J. , Hantos G. , Kovács R. , Bojta P. , Harsányi G. , Poppe A.
Published: January 2024

Lifetime testing and modelling studies of LEDs play an increasingly important role in the implementation of design solutions with an Industry 4.0 approach. This article presents the work carried out in two departments of the Budapest University of Technology and Economics, during which the frequency-dependent aging of high-power LEDs in pulsed mode (at the Department of Electron Devices) and the temperature- and relative humidity-dependent aging of low-power LEDs (at the Department of Electronics Technology) were investigated.
INVESTIGATING THE EVOLUTION OF ROAD SURFACE DESCRIPTORS ACCORDING TO OBSERVATION ANGLES USING A DATABASE OF THE REFLECTION PROPERTIES OF URBAN MATERIALS
Authors: Saint-Jacques E. , Bremon R. , Eymond F. , Morvan K.
Published: January 2024

For road lighting design, road surface descriptors like the degree of lightness Q0 and specularity S1 are derived from reflection properties (or BRDF) of road surfaces. However, these BRDF are based on outdated road surface characteristics, and are also partial (they are called r-tables) because only the motorist’s 1° observation angle is considered. Thus, the need to have full BRDF measurements of current road surfaces available. This paper proposes to use a recently released open source database of measured whole BRDF by means of our in-lab gonioreflectometer to investigate the performance of Q0 and S1. We first compare descriptors obtained from measured and interpolated r-tables and find a good accuracy, especially for Q0. Then we propose a tentative model for these descriptors function of observation angle, and find quite an accurate fitting. Finally, we suggest a methodology for the classification of road surface materials in terms of Q0 and S1.
CHARACTERISATION OF ROAD REFLECTION IN RELATION TO VEHICLE HEADLAMP ILLUMINATION
Authors: Schulze C.
Published: January 2024

The reflection of roads concerning vehicle lighting was examined on a wide range of road surfaces (hot rolled asphalt, mastic asphalt, porous asphalt, concrete and coating, made of epoxy resin and small-grain aggregate mixtures; in total 57) for 26 different combinations of headlamp height, observation height and distance under laboratory conditions.
A significant but complex relation exists between reflection and all three geometry variables. The link between reflection and angular expressions of the geometric situation is much weaker. Additionally, RL is a good candidate as a characteristic value to characterise the lightness of roads concerning vehicle headlamp lighting.
Further, road reflection concerning road lighting was also examined on those surfaces (characteristic values Q0 and S1, characterising lightness and specularity, respectively). RL varies closely non-linearly with S1, the characteristic value of specularity in terms of road lighting, and not very much with Q0.
TRAINING ON SUSTAINABLE DAYLIGHTING: THE NLITED PROJECT
Authors: Sokol N. , Giuliani F. , Sarey Khanie M. , Lo Verso V. , Gentile N.
Published: January 2024

NLITED - New Level of Integrated Techniques for Daylighting Education is a European project bridging a daylight design education gap. The paper describes the framework of the project, which consists of a free online e-platform with 32 modules dedicated to daylight knowledge within the built environment used by almost 800 learners (students and professionals). Two 7-day summer schools support the e-platform. The e-content was created by more than 30 international tutors based on a series of workshops and online surveys to define the need for sustainable daylight training. The paper addresses a gap in the literature on daylight education by describing the functioning e-platform and its usage results.
ENERGY SAVING WITHOUT COMPROMISING HUMAN COMFORT: A FIELD STUDY OF SMART LIGHTING IN OFFICE
Authors: Zhang S. , Su H. , Yang B.
Published: January 2024

Intelligent control systems can effectively reduce energy consumption during building operation, but there is a lack of rigorous empirical research of its energy-saving effects and impact on comfort. This study carried out a 129-day four-stage study by intelligently retrofitting the OCC intelligent system in real office spaces, while introducing an initial baseline and a parallel control group into the experimental design. A total of 69 volunteers participated in the empirical experiment. During the demonstration period, the data of environment sensors, human perception sensors and wireless intelligent controllers were collected, and structured questionnaire surveys were carried out for the treated group and the control group in four stages respectively. The comparative analysis results show that the intelligent retrofitting can effectively reduce lighting energy consumption by 11.8% without negatively affecting comfort.
Vibration Analysis of Free Rectangular Plates Constrained by Translational Edge Springs
Authors: Narita Yoshihiro
Published: January 2024

This paper aims to present comprehensive lists of accurate natural frequencies of isotropic thin free rectangular plates constrained only by translational springs distributed uniformly on the edges. Analytical and numerical approaches are employed to study the free vibration of the plates. The first approach is an extension of Ritz method, and second approach is the finite element method coded by the author. Numerical examples cover rectangular plates from totally free plate to totally simply supported on all edges. Convergence and comparison studies are made to establish accuracy of these solutions. Nine numerical examples are presented in terms of different of elastic constraints, and the lowest six frequency parameters are provided in the examples with different aspect ratios.
Choosing the Best Functions for the Rayleigh-Ritz Vibration Analysis of Beams
Authors: Mochida Yusuke , Eisenberger Moshe
Published: January 2024

The Rayleigh-Ritz Method is used extensively for the vibration analysis of structures. The accuracy depends on the assumed functions. In this work several different groups of functions are examined and compared for the accuracy of the resulting natural frequencies, and for the overall mode shape error norms calculated with respect to the known exact solutions. It is concluded that a set that combines low order polynomials, odd cosine and odd sine functions, or, even cosine and even sine functions, is more likely to yield the best accuracy and convergence of both frequency and mode shapes for a general beam structure.
Tug-barge operating costs based on Charterer Versus Ownership Perspective. A Case Study: Nickel Ore Transport Boenaga-Fatufia Route
Authors: Sitorus Chris Jeremy Verian , Idrus Misliah , Chaerunnisa Andi Sitti
Published: January 2024

The Tug-barge operating costs for nickel ore transhipment at Boenaga-Fatufia are based on charter and shipowner. A comprehensive study on Tug-barge investment feasibility needs to focus on the most profitable option. This study aims to determine the feasibility of investing in a Tug-barge, considering a charter Tug-barge with shipowner (newbuilding tug-barge and secondhand Tug-barge is feasible compared to a new building Tug-barge and charter Tug-barge. The highest NPV is for the secondhand Tug-barge, IDR 18.642.830.529; rhe secondhand Tug-barge also gas the highest IRR value of 20%. The secondhand Tug-barge has the fastest Payback Period, Which is 4.18 years.
Analisis Daya Dukung Pondasi Proyek Pendidikan SMK 1 Rangas Kabupaten Mamuju Sulawesi Barat
Authors: Patah Dahlia , Ridhayani Irma , Manaf Abdi , Mahmuda Ali Fauzi
Published: January 2024

Pondasi merupakan struktur bawah dari suatu bangunan yang berfungsi menopang strukur atasnya. Pondasi berfungsi menahan beban-beban dari atas, sehingga pondasi didisain dapat bertahan jika terjadi gempa ataupun kelebihan beban dan tidak boleh gagal terlebih dahulu. Beban dari struktur atas didistribusikan melalui kolom dengan nilai tegangan yang diijinkan sesuai dengan nilai daya dukung tanah. Ada dua jenis pondasi yaitu pondasi dangkal dan pondasi dalam. Pondasi  dalam  merupakan  salah  satu  jenis  pondasi  yang  digunakan  untuk  menyalurkan  beban struktur ke lapisan tanah keras yang memiliki kapasitas daya dukung tinggi yang letaknya cukup dalam di dalam tanah. Studi analisa daya dukung tanah pondasi dalam yang menggunakan mini pile berukuran 25 x 25 cm dilaksanakan pada proyek pembangunan gedung sekolah SMK 1 Rangas Kabupaten Mamuju dengan menggunakan data sondir (CPT) sebanyak 2 titik dengan masing-masing kedalaman 15,8 m dan 5,0 m. Kedalaman perencanaan pondasi terlebih dahulu harus dihitung dan ditentukan kapasitas daya dukung rencana. Tujuan dari studi ini yaitu menghitung dan mengetahui nilai daya dukung ultimit aksial tiang pancang tunggal dalam kelompok tiang dengan metode analitis dan mengetahui besarnya daya dukung kelompok tiang. Desain pondasi meliputi kekuatan satu tiang pondasi, efesiensi kelompok tiang dan perhitungan distribusi beban pada tiang. Berdasarkan hasil analisis didapat pondasi mini pile mampu menahan beban yang bekerja  diatasnya,  sehingga  pondasi dikategorikan aman. Dari hasil perhitungan diperoleh efesiensi kelompok tiang yaitu 83,08%, jumlah tiang 3 buah dengan daya dukung kelompok tiang 68,29 ton yang mampu menahan gaya aksial yaitu 59,54 ton.
Pemodelan Regresi untuk Investigasi Penggerak Konsumsi Listrik Rumah Tangga di Kota Makassar
Authors: Dharmawan Rian , A Hasniaty , Akil Yusri Syam
Published: January 2024

Sektor perumahan merupakan salah satu sektor kelistrikan di Indonesia dengan permintaan listrik yang tinggi dan cenderung meningkat setiap saat. Untuk itu, penghematan atau penggunaan listrik rumah tangga yang lebih efisien penting dilakukan untuk mendukung konsumsi berkelanjutan. Paper ini mengkaji penggerak konsumsi listrik rumah tangga di kota Makassar menggunakan pendekatan regresi. Variabel penjelas dalam tiga model yang disusun meliputi perilaku konsumen (PRK), peralatan listrik hemat energi yang dimiliki (PLH), karakteristik bangunan (KRB), dan aspek pendukung lain untuk hemat energi (APL). Sampel data sebanyak 205 pelanggan listrik rumah tangga diperoleh melalui survei menggunakan kuesioner dari dua area di Makassar, yaitu kecamatan Tamalate (Area-1) dan Biringkanaya (Area-2). Hasil menunjukkan bahwa penggerak konsumsi listrik di setiap area relatif berbeda termasuk besar pengaruhnya. Pada Area-1 ditemukan tiga variabel memiliki signifikansi dengan arah pengaruh seperti yang diharapkan (PRK, KRB, dan APL). Sementara pada Area-2, ditemukan hanya variabel APL yang signifikan dengan arah pengaruh yang bersesuaian. Hasil lain untuk analisis gabungan area menunjukkan bahwa secara umum KRB dan APL adalah dua penggerak utama konsumsi. Informasi yang diuraikan bermanfaat dalam penyusunan strategi yang lebih baik ke pelanggan dalam meningkatkan efisiensi penggunaan listrik pada level rumah tangga.
Desain Awal Fast Ferry untuk Perairan Laut dan Sungai Kalimantan untuk Peningkatan Konektivitas Wilayah Penopang IKN
Authors: Pawara Muhammad Uswah , Alamsyah Alamsyah , Suardi Suardi , Hidayat Taufik
Published: January 2024

Mengacu pada karakteristik sungai di wilayah Kalimantan dengan panjang sungai yang dapat menjangkau kilometer serta alur pelayarannya cenderung dangkal, diperlukan moda transportasi kapal cepat yang dapat melalui kondisi perairan dengan sarat yang rendah (low draft). Dukungan transportasi sungai ini diharapkan mampu menopang transportasi darat yang merupakan transportasi utama agar menunjang konektivitas antar wilayah terutama setelah dicanangkannya pemindahan Ibu Kota Negara (IKN), proyek besar ini diharapkan mampu meningkatakan pemarataan ekonomi khususnya diwalayah kalimantan yang dapat diwujudkan melalui peningkatan mobilitas manusia dan barang. Oleh kerana itu, kondisi geografis Kalimantan yang memiliki banyak sungai harus dioptimalkan melalui sarana tranportasi air yang modern, nyaman, cepat, dan terjangkau secara ekonomi, sehingga masyarakat pedalaman memiliki tranportasi alternatif. Melalui penelitian diperoleh ukuran utama kapal cepat yaitu Lbp:30 meter; Loa:29,015 meter; B:8,51 meter; H:5,46; dan T: 3 meter.
Estetika Fasad Pada Pusat Perbelanjaan (Studi Kasus : Grand Mall Maros)
Authors: Amri Mawaddah Haeri , Syam Syahriana , Radja Abdul Mufti
Published: January 2024

Perkembangan zaman yang semakin maju saat ini memberi banyak pengaruh kepada manusia. Pusat perbelanjaan adalah sekelompok kesatuan bangunan komersial yang dibangun dan didirikan pada lokasi yang direncanakan, dikembangkan, dimulai dan diatur menjadi sebuah kesatuan operasi (operating unit), berhubungan dengan lokasi, ukuran, tipe toko dan area perbelanjaan dari unit tersebut. Fasad masih menjadi elemen penting dalam arsitektur untuk mengetahui fungsi dan makna sebuah bangunan. Fasad menunjukkan kondisi budaya pada saat bangunan tersebut dibangun, menampilkan kriteria susunan dan penataan, serta dapat memberikan kemungkinan adanya kreativitas dalam sebuah ornamentasi dan dekorasi. Grand Mall Maros menggunakan gaya bangunan yang berbeda dengan gaya bangunan yang terdapat di kabupaten Maros pada umumnya. Penelitian ini menggunakan paradigma post-positivistik dengan jenis penelitian kualitatif. Adapun teknik analisis yang digunakan adalah jenis deskriptif-eksplanatif melalui analisis konten non-tekstual berupa data visual. Hasil penelitian menunjukkan bahwa gaya arsitektur klasik yang diadopsi oleh Grand Mall Maros lebih dominan ke Arsitektur Barok. Grand Mall Maros menerapkan elemen estetika. Terdapat garis horizontal dan vertikal, penerapan bentuk-bentuk yang beragam yanitu persegi, segitiga, kubah, dan kurva. Bertekstur halus, penerapan balustrade pada fasad sehingga mencipatakan elemen ruang. Penerapan warna-warna netral dan light value. Serta memiliki bidang dasar, bidang dinding, dan bidang atas. Grand Mall Maros sangat menonjolkan prinsip kesatuan dimana tidak adanya keanekaragaman yang menimbulkan kekacauan komposisi.
Optimasi Parameter Proses Anodisasi Aluminium 6061 untuk Komponen Otomotif
Authors: Hidayat Hidayat
Published: January 2024

Paduan Aluminium banyak digunakan untuk berbagai tujuan karena senyawanya yang menarik dengan kekuatan khusus yang sangat baik, mudah dibentuk, metode pembuatan yang bagus, konduktivitas listrik yang tinggi dan ketersediaan dalam berbagai aplikasi, terutama untuk keperluan komponen otomotif. Aluminium 6061 dipelajari dalam penelitian ini karena merupakan salah satu material yang sering digunakan untuk aplikasi komponene otomotif. Metode yang digunakan dalam penelitian ini adalah Anodisasi. Tujuannya adalah untuk membangun lapisan oksida pada permukaan lembaran paduan Aluminium 6061, dan juga menganalisis struktur mikro dan sifat mekanik lapisan yang diendapkan. Pelapisan lapisan oksida dilihat dengan melakukan karakterisasi permukaan. Peningkatan kekerasan permukaan dengan uji kekerasan mikro dari 35,3 HV menjadi 65,8 HV. Uji adhesi untuk mengetahui kekuatan rekat dicapai dengan beban kegagalan sekitar 2023,9 mN. Sifat mekanik untuk kekerasan permukaan dan kekuatan rekat aluminium oksida yang dilapisi lembaran Aluminium 6061 meningkat.
Design of Self-Propelled Container Barge for Logistics Transportation of Samarinda-Kotabangun
Authors: Pawara Muhammad Uswah , Setiawan Wira , Alamsyah Alamsyah , Suardi Suardi , Ramadhani Rizky
Published: January 2024

currently general cargo transportation using containers is preferred. There are many reasons for choosing a container compared to normal cargo transportation, some of the reasons are having a standardized protection system, so it is safer to protect cargo. On the Samarinda - Kota Bangun route, transportation for logistics distribution uses the truck transportation mode. In this mode of transportation, it is highly influenced by traffic conditions and the roads in which it passes. For this reason, the use of self-propelled container barges (SPCB) is considered very efficient because it can overcome problems in container transportation rather than using land transportation modes. To get the design of a self-propelled container barge ( SPCB) the main size of the ship is obtained from the ratio of the main size of the ship. Then make a Line Plan with Maxsurf software and make a general plan with Autocad software and the main measurements obtained are; Lpp = 83.7 m; Lwl = 87.04 m; B = 12 m; H = 6 m; T = 4.5 m; VS = 10 knot; D = 4383 ton. With the number of containers as much as 140 Teus, the largest trim occurs at 0% DWT, namely 0.611 m stern trim. All the stability criteria of IMO A 749 (18) meet the 4 variations of the weight of the ship. In the DWT condition 100% the GZ max value is 0.512 m at an angle of 27.3○, and in the DWT condition 50% the GZ max value is 1.717 m at an angle of 38.2○ and at 25% DWT condition the GZ max value is 2.454 m occurs at an angle of 40.9○, and at 0% DWT condition, the maximum GZ value is 2.674 m occurs at an angle of 25.5○.
Getaran Torsional Sistem Propulsi Kapal Tug Boat
Authors: Alamsyah Alamsyah , Hapsari Dessy Purwita , Wulandari Amalia Ika , Setiawan Wira , Pawara Muhammad Uswah
Published: January 2024

The Torsional Vibration of Propulsion System of the Tug Boat Ship. Vibrations that occur in the ship's propulsion system can cause reduced operating capability and cause damage to the ship's components, one of the vibrations that occur in the ship's propulsion system is torsional vibration. The purpose of this study was to determine the value of torque oscillations in Tugboat Ship propulsion systems and to find out the value of noise radiation following ICES 209 standard with variations of ST 60 steel material, stainless steel, and carbon steel, using analitical methods. The results obtained by the torque oscillation value of the propulsion system from Tugboat Ship BPW 3 with the variation of ST 60 steel material is 0.0004854, while for carbon steel material, the torque oscillation value is 0.0004690 and the propulsion system that uses stainless steel material variation is 0.0004527. The level of noise radiation (SL) that occurs in propulsion systems using variations of ST 60 steel material is 133.22 dB, while for carbon steel material is 133.23 dB and for stainless steel material is 133.25 dB, of the three noise radiation values (SL ) produced, is still included in the ICES 209 noise level standard.
Perancangan Trash Skimmer Boat pada Sungai Karang Mumus Kota Samarinda
Authors: Setiawan Wira , Wulandari Amalia Ika , Renaldy Muhammad Rafi
Published: January 2024

Menurut data Dinas Lingkungan Hidup Kota Samarinda pada tahun 2020, sampah yang dihasilkan di kota tepian tersebut mencapai 610 ton dalam sehari. Salah satu Sungai yang terdampak sampah di Kota Samarinda adalah Sungai Karang Mumus. Salah satu solusi untuk mengatasi permasalahan sampah pada sungai tersebut adalah dengan bantuan Trash Skimmer Boat. Kapal ini memiliki jenis lambung monohull dengan ukuran utama sebesar LOA=10 m, B=3 m, H=1 m, T=0.5 m dan dengan kecepatan 4 knots. Proses pengangkutan sampah dilakukan dengan menggunakan bantuan conveyor dengan daya penggerak 3.44 kW. Kapal pengangkut sampah dilengkapi dengan tempat penampungan sampah dengan kapasitas 3,5 ton yang dilengkapi dengan jaring. Adapun rute pembersihan sampah yang dilakukan dari muara Sungai Karang Mumus hingga Sungai yang berada pada jalan Dr. Sutomo dengan jalur pembersihan sepanjang 4.1 km. Adapun tempat pembuangan sampah darat tetap direncanakan sesuai kondisi eksisting yang ditempatkkan pada tepian di jalan jelawat Kota Samarinda
Perancangan Automatic Transfer Switch (ATS) Pembangkit Listrik Hybrid Panel Surya dan Generator untuk Bagan Apung
Authors: Aswar Muhammad Baharuddin Arif , Mahmuddin Faisal , Lestari Anugrah Darma
Published: January 2024

Design of Automatic Transfer Switch (ATS) Hybrid Solar Panel and Generator Power Plant for Floating Fishnet. Fishing business with floating nets has great benefits for small-scale fisheries. The development of the floating fishnet is quite good in Indonesia, especially in terms of production and fishing production. The problem of lack of lighting sources is the main problem faced by fishermen on the floating fishnet because the source of electricity used usually comes from conventional power plants (gasoline generators). Hybrid power plant is one of the power plant innovations that can take advantage of the use of renewable energy and become a solution to produce alternative energy on a floating fishnet. Automatic Transfer Switch (ATS) of hybrid power generation system is designed for automatic switch when the main power generation system has reached the specified voltage limit of 11V and is also designed for automatic switch when the backup power generation system has reached the specified voltage limit of 10V. The results obtained indicate that the main power generation source supplies 240W of load for 44 minutes with an average consumption current of 0.182A, while the backup power source supplies 240W for 28 minutes with an average current of 0.177A.
Programa Residência Pedagógica e o Estágio Supervisionado: principais diferenças na inserção profissional de futuros docentes
Authors: Tardin Heitor Perrud , Ananias Elisangela Venancio
Published: January 2024

O Programa Residência Pedagógica (PRP) estabeleceu-se como dispositivo de inserção profissional, mas, como os Estágios Supervisionados (ES) já desempenham esse papel nos cursos de formação de professores, estabeleceu-se um campo de disputas, com impacto na formação. Este estudo objetivou: levantar-se, analisar e compreender as propostas do PRP em diálogo com os ES, considerando a BNC-Formação. Trata-se de um estudo qualitativo, utilizando análise documental e bibliográfica como técnicas de pesquisa. A legislação e os estudos sobre a formação de professores indicam que ambas propostas contribuem para o campo da docência, com características próprias, por vezes, complementares, mas não concorrentes. Com isso, propõe-se que o PRP aconteça como Residência Médica, no âmbito da pós-graduação, e os ES em sua singularidade, mantendo a formação inicial de forma democrática, acessível e como parte do percurso formativo de professores. Nesta proposição, recursos financeiros e formativos destinados ao PRP seriam redimensionados como proposta de desenvolvimento profissional.
análisis metafuncional de la traducción de textos de economía del español al inglés
Authors: Syman Tatsiana , Ignatieva Natalia
Published: January 2024

Diferentes textos económicos institucionales del Banco de México son publicados en español y traducidos al inglés. Dado el potencial impacto económico causado por posibles faltas de equivalencia en las traducciones, estudiamos un corpus bilingüe desde el punto de vista de las técnicas de traducción y de la lingüística sistémico-funcional (LSF), a fin de identificar faltas de equivalencia o incluso errores de traducción. Específicamente, se analizaron las técnicas de traducción empleadas y se registraron y clasificaron los errores de traducción. Posteriormente, se aplicó un análisis metafuncional tridimensional: análisis ideacional (procesos y participantes); interpersonal (expresiones de actitud, formalidad, modalidad, etc.); y textual (coherencia en la organización temática). Si bien la identificación de los errores de traducción mejora el documento traducido, la exploración metafuncional aporta un análisis cualitativo más profundo de los aspectos no reflejados en las técnicas, revela las causas de los errores de traducción y puede servir como criterio en determinar la equivalencia.
Hacerse el lugar. Lideresas comunitarias en contextos del conflicto armado colombiano
Authors: Cataño-Pulgarin Shirley Viviana , Giraldo-Tangarife Claudia Milena , Jiménez-Ortíz Eliana Andrea
Published: January 2024

En este artículo se presentan los hallazgos de la investigación que buscó identificar la posible relación entre ejercicios de memoria histórica y la intencionalidad en su construcción intergeneracional. El proceso investigativo se realizó en el municipio de Granada, Antioquia, afectado por el conflicto armado y con fuerte historia de organización comunitaria. La metodología fue cualitativa fundamentada en la perspectiva fenomenológico-interpretativa y, para el propósito descrito, se usó entrevistas semiestructuradas. Se encontró que, si bien no es clara la intencionalidad del relevo en los Encuentros de Saber (estrategia de las organizaciones) éste se materializa en la vinculación de los hijos y familiares en los procesos comunitarios. De otro lado, las organizaciones comunitarias propician que las mujeres, que vivieron tanto la violencia social del conflicto armado como la violencia privada del machismo en sus relaciones familiares y de pareja, se hagan un lugar político para la participación pública, para el reconocimiento, para la lucha por los derechos y para la transformación de sus vidas, en suma, para ser lideresas.
Concepciones de estudiantes de pregrado respecto de la formación en investigación en Trabajo Social en Chile
Authors: Jarpa-Arriagada Carmen Gloria , Cárcamo-Vásquez Héctor Gonzalo , Gallegos-Fuentes Marcelo Andrés
Published: January 2024

El trabajo buscó develar la configuración de las concepciones de los y las estudiantes en torno a la etapa de diseño de la investigación conducente a la obtención del grado de licenciado en trabajo social. El estudio se realizó en una universidad pública del sur de Chile. Se utilizó método cualitativo, aplicando un cuestionario de preguntas abiertas a 14 estudiantes. Los resultados indican que las concepciones de los estudiantes se pueden agrupar en tres categorías: aprendizajes cognitivos, aprendizajes procedimentales y aprendizajes actitudinales.  En lo cognitivo la principal debilidad es el dominio de contenidos ontológicos y epistémicos; en lo procedimental existe tensión en la aplicación de los contenidos por aspectos emocionales que afectan las decisiones del(la) estudiante; en lo actitudinal el estudiantado exhibe conductas heterónomas y requiere de la presencia permanente del profesor guía. Como conclusión, el estudiantado sigue anclado en lógicas clásicas de investigación, con escaso dominio epistémico, teórico y técnico. En el binomio teoría-práctica existe una tendencia a enfatizar en la práctica.
Educación, derechos y deberes ambientales como aporte para lograr una paz ambiental en Siachoque, Boyacá en el marco de los ODS
Authors: Amaya-Hoyos Sheerly Katherine , Daza-Orjuela Camila Alejandra , Rivera-Gómez Leidy Johanna , Rivera-Gómez Andrés Felipe
Published: January 2024

La presente propuesta ha buscado contribuir en la educación sobre derechos y deberes ambientales a través del estudio de los Objetivos de Desarrollo Sostenible (ODS) 6: “Agua limpia y saneamiento”, el 13: “Acción por el Clima” y, el 15: “Vida de ecosistemas terrestres”, en los estudiantes de 8° de la Institución Educativa Ignacio Gil Sanabria (IEIGS), Siachoque, Boyacá, con el fin de aportar a la construcción de una paz ambiental en el páramo “Cortadera”. La metodología empleada fue la Investigación Acción (IA), junto con las Soluciones basadas en la Naturaleza (SbN) a través de las cuales se buscó incrementar acciones para el ecocuidado y compromiso con la “Cortadera”. Se identificó el desconocimiento de gran parte de los estudiantes de 8° del páramo Cortadera, así como los factores que afectan constantemente al ecosistema; se evidenció vacíos en tema de derechos y deberes ambientales, qué son y cuáles son los ODS que buscan el cuidado del planeta. A través del desarrollo del proyecto, se reconoció lo que son los ODS y la importancia de aplicar los 6, 13 y 15 para el cuidado y la conservación del páramo; se logró establecer la relación de dichos ODS con los derechos y deberes ambientales; y se pudo concluir que es fundamental incrementar las visitas de los estudiantes al páramo, así como el brindarles herramientas para que identifiquen los factores que afectan negativamente el entorno y su nivel afectación. Será fundamental un trabajo articulado entre el Colegio, las familias y la comunidad.
Insufficient Evidence for Load as the Primary Cause of Nonspecific (Chronic) Low Back Pain. A Scoping Review
Authors: de Bruin L.J.E. , Hoegh M. , Greve C. , Reneman M.F.
Published: January 2024

OBJECTIVE: To assess the causal role of the relationship between loading and the onset of nonspecific low back pain (NSLBP) and persistence of NSLBP (chronic low back pain [CLBP]).

DESIGN: Scoping review.

LITERATURE SEARCH: We searched the literature from 2010 until May 2021 using a combination of terms related to (spinal) load and the Bradford-Hill (BH) criteria.

STUDY SELECTION CRITERIA: Operational definitions were developed for every criterion of the BH framework for causality. Study selection was based on the causal role of load in the onset of NSLBP and persistence of chronic low back pain.

DATA SYNTHESIS: The BH criteria were operationalized, and causation was considered established when evidence supported the BH criteria strength, temporality, biological gradient, experiment, and biological plausibility.

RESULTS: Twenty-two studies were included. There was no consistent support for an association between load and the incidence of NSLBP, or that more load increased the risk of NSLBP/CLBP. Half of the studies did not support specific load exposures to increase incidence of or increase pain in NSLBP/CLBP. Half of studies did not support load preceding NSLBP. No study supported plausible biological explanations to influence the relationship between load and NSLBP/CLBP, or that similar causes have similar effects on NSLBP. Nine of 10 experimental studies did not support that load results in NSLBP or that relieving load reduces NSLBP/CLBP.

CONCLUSION: There was insufficient evidence to support a causal relationship between loading and the onset and persistence of NSLBP/CLBP based on the BH criteria. These results question the role of load management as the only/primary strategy to prevent onset and persistence of NSLBP/CLBP. J Orthop Sports Phys Ther 2024;54(3):176-189. Epub 25 January 2024. doi:10.2519/jospt.2024.11314
INTERACTION FEATURES 4-NITROSEMICARBAZIDE WITH ACETYLACETONE
Authors: Глухачева В.С.
Published: January 2024

Представлено исследование, выявляющее закономерности и направленность протекания взаимодействия 4-нитросемикарбазида с ацетилацетоном. В результате предложен новый подход к получению 3,5 диметил-пиразола и ранее неизвестного 3,5-диметил-N-нитропиразол-1-карбоксамида. Показано, что собственная кислотность 3,5-диметил-N-нитропиразол-1-карбоксамида является промотором инициирования денитрамидирования, что способствует быстрому протеканию реакции гидролиза с образованием 3,5-диметилпиразола. Строение полученных соединений подтверждено УФ- ИК- и ЯМР- спектроскопией.

A study is presented that reveals the patterns and direction of the interaction of 4-nitrosemicarbazide with acetylacetone. As a result, a new approach to the preparation of 3,5 dimethyl-pyrazole and previously unknown 3,5-dimethyl-N-nitropyrazole-1-carboxamide was proposed. It was shown that the intrinsic acidity of 3,5-dimethyl-N-nitropyrazole-1-carboxamide is a promoter of the initiation of denitramidation, which contributes to the rapid occurrence of the hydrolysis reaction with the formation of 3,5-dimethylpyrazole. The structure of the obtained compounds was confirmed by UV, IR and NMR spectroscopy.
Subcellular Concurrent Delivery of Hydrogen Sulfide and A Payload with Near-Infrared Light
Authors: Hanc Katarzyna , Janeková Hana , Stacko Peter
Published: January 2024

Hydrogen sulfide (H2S) is a gaseous signaling molecule, exerting crucial regulatory functions in organelles and cellular environments. H2S exhibits high therapeutic potential, synergistic effects with other drugs, and its potency is notably enhanced through organelle-specific targeting. Yet navigation of light-activated H2S donors to specific organelles remains absent. Here we report a cyanine-based dual-action photocage operated by tissue-penetrating near-infrared light. The system simultaneously delivers H2S and a fluorogenic payload, displaying a self-reporting behavior of the uncaging. We demonstrate that H2S and an amine payload are concurrently uncaged in the mitochondria of live human cells using fluorescence microscopy and confirm the localization of their delivery using mitochondria-specific fluorescent probes. Anticipating that these photocages will permit the future delivery of H2S–drug pairs with high spatiotemporal control, we envision these photocages to drive harnessing synergistic effects and opening the way to innovative therapeutic avenues.
Pathways of Quantum Dot Degradation during Photocatalysis
Authors: Dou Florence , Nishiwaki Emily , Larson Helen , Zion Tallie , Nguyen Hao , Cossairt Brandi
Published: January 2024

CdS QDs are widely employed as photocatalysts for reactions such as hydrogen evolution, and its degradation under aerobic, aqueous conditions is well understood. However, despite evidence of aggregation and precipitation of CdS QD photocatalysts under inert conditions, catalyst speciation and degradation are under-explored. In this work, we demonstrate that during a reductive dehalogenation reaction, CdS QDs undergo surface ligand etching, leading to loss of colloidal stability and the formation of micro-crystalline cadmium metal deposits. We hypothesize that this results from the accumulation of electrons on the QD surface. In addition, we demonstrate a high catalytic TOF of 0.67 s-1 and show evidence of mild surface sulfur oxidation and formation of an ammonium salt by-product of the hole quencher. This work adds to our atomic-level understanding of the reactions occurring at the QD surface during photocatalysis and ultimately uncovers design principles that will allow the design of more stable and efficient catalysts.
Dual optical cycling centers mounted on an organic scaffold: New insights from quantum chemistry calculations and symmetry analysis
Authors: Khvorost Taras , Wojcik Pawel , Chang Cecilia , Calvillo Mia , Dickerson Claire , Krylov Anna , Alexandrova Anastassia
Published: January 2024

Molecules cooled to the ultracold temperatures are desirable for applications in fundamental physics and quantum information science. However, cooling polyatomic molecules with more than six atoms has not yet been achieved. Building on the idea of an optical cycling center (OCC), a moiety supporting a set of localized and isolated electronic states within a polyatomic molecule, molecules with two OCCs (bi-OCCs) may afford a better cooling efficiency by doubling the photon scattering rate. By using quantum chemistry calculations, we assess the extent of the coupling of the two OCCs with each other and with the molecular scaffold. We show that promising coolable bi-OCC molecules can be proposed following chemical design principles.
DAS sensitivity to heterogeneity scales much smaller than the minimum wavelength
Authors: Capdeville Yann , Sladen Anthony
Published: January 2024

Distributed Acoustic Sensing (DAS) is a photonic technology allowing toconvert fiber-optics into long (tens of kilometers) and dense (every few meters) arrays of seismo-acoustic sensors which are basically measuring the strain of the cable all along the cable. The potential of such a distributed measurement is very important and has triggered strong attention in the seismology community for a wide range of applications. In this work, we focus on the interaction of such measurements with heterogeneities of scale much smaller than the wavefield minimum wavelength. With a simple 2-D numerical modeling, we first show that the effect of such small-scale heterogeneities, when located in the vicinity of the instruments, is very different depending on whether we measure particle velocity or strain rate: in the case of velocity, this effect is small but becomes very strong in the case of the strain rate. We then provide a physical explanation of these observations based on the homogenization method showing that indeed, the strain sensitivity to nearby heterogeneities is strong, which is not the case for more traditional velocity measurements. This effect appears as a coupling of the strain components to the DAS measurement. Such effects can be seen as a curse or an advantage depending on the applications.