bluuebunny/crossref_metadata_2025_split huggingface dataset:
PENURUNAN BOD, COD DAN TSS PADA LIMBAH DOMESTIK MENGGUNAKAN KOMBINASI FLOATING WETLAND DILANJUTKAN CONSTRUCTED WETLAND
Authors: Hadi Syavira Nurlita , Pungut Pungut 
Published: August 2022

Seiring laju perkembangan penduduk di Indonesia yang semakin meningkat tiap tahunnya, meningkat pula jumlah kebutuhan air bersih yang digunakan mengakibatkan volume air limbah yang dihasilkan cukup melimpah terutama di perkotaan salah satunya adalah limbah domestik. Limbah domestik mengandung bahan organik dan anorganik maupun gas yang terkandung dalam limbah cair rumah tangga dapat mencemari lingkungan serta menyebabkan berbagai penyakit. Limbah cair yang dihasilkan biasanya memiliki nilai konsentrasi Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), dan Total Suspended Solids (TSS) yang cukup tinggi. Dengan adanya permasalahan yang terjadi, maka salah satu solusi upaya untuk menyelesaikan permasalahan pencemaran limbah domestik adalah kombinasi floating wetland menggunakan tanaman eceng gondok dilanjutkan sistem lahan basah (Constructed Wetland) menggunakan tanaman bambu air dan melati air untuk menurunkan konsentrasi BOD5,COD dan TSS. Tujuan dari penelitian ini adalah untuk menurunkan konsentrasi BOD5, COD dan TSS pada limbah domestik. Parameter awal pada limbah domestik kadar BOD5 rata-rata sebesar 210,67 mg/L, COD rata-rata sebesar 399,22 mg/L dan TSS rata-rata sebesar 249,33 mg/L. Setelah diolah pada reaktor A (Floating wetland + Constructed wetland (Bambu Air)), mampu turun menjadi rata-rata kadar BOD5 sebesar 76,33 mg/L, COD sebesar 144,11 mg/L L dan TSS sebesar 67,33 mg/L. Sedangkan pada reaktor B (Floating wetland + Constructed wetland (Melati Air)), mampu turun menjadi rata-rata kadar BOD5 sebesar 60,67 mg/L, COD sebesar 129,44 mg/L dan TSS sebesar 44,00 mg/L. Hasil yang diperoleh efisiensi penurunan kadar BOD5,COD dan TSS tertinggi terjadi pada reaktor B (Floating wetland + Constructed wetland (Melati Air)), BOD5 sebesar 53,76% atau 60,67 mg/L, COD sebesar 44,57 % atau 129,44 mg/L dan TSS sebesar 57,47 % atau 44,00 mg/L.
Evaluation of Lightweight Grousers for Agricultural Tracks: New Solution for Soft Soil Problem
Authors: Khadzir Mohd Khusairy , Ahmad Mohd Taufik , Omar Muhammad Fakhrulzaman , Mohd Ghazali Mohd Shahril Shah 
Published: August 2022

Crop maintenance machinery for herbicide spraying and spreading fertilizer input has been the current practice for paddy production in Malaysia, especially in large granary areas. Soft soil issues in paddy fields have become a significant problem and prevent heavy machinery from conducting field operations. Current paddy prime movers use rubber wheels that produce high ground contact pressure onto the soil for crop maintenance operation. With high ground contact pressure, the probability of machines sinking into the soil, or bogged down, is higher and can cause the machine to get stuck. This also can result in hardpan damage (Mandang et al., 2000). Recently, prime agriculture mover uses steel track that has the issue on-road or soil damaged due to the grousers material use. Engineering Research Centre in Malaysian Agricultural Research and Development Institute (MARDI) have found an alternative solution for this issue by developing and replacing all the wheels on a standard 12.75 kW (17 hp) High Clearance Prime Mover with Polyoxymethylene (POM) grousers equipped on triangular track-based system. This paper aims to find the optimal size of grousers for POM material to be installed on the high clearance machinery for alternative solutions to solve problematic soil and its effect on the soil. Polyoxymethylene or POM was chosen due to its excellent rigidity, impact toughness, abrasion resistance, creep resistance and solvent resistance, hydrolytic stability fatigue endurance, low coefficient of friction lightweight. To develop suitable POM grousers, a triangular track-based system has been tested with three different length sizes of rectangular wooden track grousers 13 x 4 x 4 cm, 15 x 4 x 4 cm, and 18 x 4 x 4 cm that could be quickly mounted on or removed from D4 track chain, permitting rapid sequential testing on the soft soil area. Field tests have been conducted at MARDI Seberang Perai, Pulau Pinang. The measured parameters were slippage, machine sinkage, and soil compaction. The high clearance prime mover obtained slippage of 16.4% using 13cm shoes and 18.2% for 15 cm 22.2% for 18 cm accordingly, and sinkage for all shoe size were less than 30 cm.
Water Recycling System: Sustainable Water Management Approach for Paddy Production
Authors: Ahmad Muhammad Haniff bin , Teoh Chin Chuang , Sharu Eddy Herman , Khadzir Mohd Khusairy , Mat Nor Saifulizan , Arshad Muhammad Azamuddin 
Published: August 2022

The current climate change, combined with the increased demands from both traditional and new water users, including municipal, industrial, and agricultural sectors have impacted water resources. Thus, recycling of water as irrigation to secure seed production has a substantial impact on food security sustainability. In this research, a water recycling system was developed and tested to sustain the seed production. The research was conducted through eight seasons since 2014 to 2019 at the Rice Centre of Excellence (CoE) research plot in MARDI Seberang Perai. The system included the facilities to irrigate and collect water to be reused again. This approach was done to sustain the water resources as to ensure that the cultivation of paddy was not affected by weather changes. Rainfall and irrigation flow data were collected for the all of the seasons. Observation of field water depth was monitored every two days before irrigation was applied. This system proved that the total water saving for every season studied had a range from 20% to 32%, depending on the rainfall intensity. From this study, more than 3.5 t/ha of fragrance paddy seed were successfully produced for research and development purposes.
Comparison of concrete creep test methods as per Russian and foreign normative documents. Part 2. Testing and processing of results
Authors: Arleninov P. D. 
Published: August 2022

Introduction. The main approaches to long-term creep tests of concrete regulated by GOST 24544-2020, valid in the Russian Federation, as well as foreign ISO, ASTM, and EN standards, are analyzed.Aim. In this work, fundamental differences in conducting tests following Russian and foreign standards are determined. These efforts are essential and urgent, since, in order to use test results obtained abroad in Russia, it is necessary to harmonize test methods and initial test parameters (samples, measuring and test equipment, etc.).Materials and methods. The article reviews testing procedures, controlled parameters, and processing of result; part 1 of the article covered the application, testing and measuring equipment, manufacturing process, sample parameters and fittings, and test preparation.Results. ISO, ASTM, and EN are comparable; however, they differ greatly from GOST 24544 in some respects, in particular, regarding the sample parameters and the methods of their installation in the testing equipment.Conclusion. Further harmonization of GOST 24544 with the aforementioned foreign standards is necessary.
Ωbar in NGC 5597 from Very Large Array H i 21 cm Observations
Authors: Antonio Garcia-Barreto J. , Momjian Emmanuel 
Published: August 2022

Abstract
We report Very Large Array B-configuration observations of the atomic hydrogen 21 cm line emission from the barred disk galaxy NGC 5597 at an angular resolution of ∼ 7.″1 × 4.″2. Using the resonance method, and assuming the ratio of the corotation radius to the semimajor axis of the stellar bar is unity (


≡

R

CR

/

a

bar

=
1

), we estimate the angular pattern speed of the stellar bar to be, Ωbar ∼ 15.3 km s−1 kpc−1. This constant value for Ωbar crosses Ωgas + κ(R)/4 at a distance ∼6.73 kpc, which would correspond to the spatial location of the north spiral structure near an outer m = 4 resonance. This value of Ωbar is similar to the values estimated for other bright nearby barred galaxies that exhibit circumnuclear rings (near inner Lindblad resonance) or outer rings (near outer Lindblad resonance).
WiNDS: An H
α
Kinematics Survey of Nearby Spiral Galaxies—Vertical Perturbations in Nearby Disk-type Galaxies
Authors: Urrejola-Mora Catalina , Gómez Facundo A. , Torres-Flores Sergio , Amram Philippe , Epinat Benoît , Monachesi Antonela , Marinacci Federico , de Oliveira Claudia Mendes 
Published: August 2022

Abstract
We present the Waves in Nearby Disk galaxies Survey (WiNDS) consisting of 40 nearby low-inclination disk galaxies observed through H
α
high-resolution Fabry–Perot interferometry. WiNDS consists of 12 new galaxy observations and 28 data archived observations obtained from different galaxy surveys. We derive two-dimensional line-of-sight velocity fields that are analyzed to identify the possible presence of vertical velocity flows in the galactic disks of these low-inclination late-type galaxies using velocity residual maps, derived from the subtraction of an axisymmetric rotation model from a rotational velocity map. Large and globally coherent flows in the line-of-sight velocity of nearly face-on galaxies can be associated with large vertical displacement of the disk with respect to its midplane. Our goal is to characterize how frequent vertical perturbations, such as those observed in the Milky Way, arise in the local universe. Our currently available data have allowed us to identify 20% of WiNDS galaxies with strong velocity perturbations that are consistent with vertically perturbed galactic disks.
Inferring Halo Masses with Graph Neural Networks
Authors: Villanueva-Domingo Pablo , Villaescusa-Navarro Francisco , Anglés-Alcázar Daniel , Genel Shy , Marinacci Federico , Spergel David N. , Hernquist Lars , Vogelsberger Mark , Dave Romeel , Narayanan Desika 
Published: August 2022

Abstract
Understanding the halo–galaxy connection is fundamental in order to improve our knowledge on the nature and properties of dark matter. In this work, we build a model that infers the mass of a halo given the positions, velocities, stellar masses, and radii of the galaxies it hosts. In order to capture information from correlations among galaxy properties and their phase space, we use Graph Neural Networks (GNNs), which are designed to work with irregular and sparse data. We train our models on galaxies from more than 2000 state-of-the-art simulations from the Cosmology and Astrophysics with MachinE Learning Simulations project. Our model, which accounts for cosmological and astrophysical uncertainties, is able to constrain the masses of the halos with a ∼0.2 dex accuracy. Furthermore, a GNN trained on a suite of simulations is able to preserve part of its accuracy when tested on simulations run with a different code that utilizes a distinct subgrid physics model, showing the robustness of our method. The PyTorch Geometric implementation of the GNN is publicly available on GitHub (https://github.com/PabloVD/HaloGraphNet).
Extragalactic Millimeter Transients in the Era of Next-generation CMB Surveys
Authors: Eftekhari T. , Berger E. , Metzger B. D. , Laskar T. , Villar V. A. , Alexander K. D. , Holder G. P. , Vieira J. D. , Whitehorn N. , Williams P. K. G. 
Published: August 2022

Abstract
The next generation of wide-field cosmic microwave background (CMB) surveys are uniquely poised to open a new window into time-domain astronomy in the millimeter band. Here, we explore the discovery phase space for extragalactic transients with near-term and future CMB experiments to characterize the expected population. We use existing millimeter-band light curves of known transients (gamma-ray bursts, tidal disruption events, fast blue optical transients (FBOTs), neutron star mergers) and theoretical models, in conjunction with known and estimated volumetric rates. Using Monte Carlo simulations of various CMB survey designs (area, cadence, depth, duration) we estimate the detection rates and the resulting light-curve characteristics. We find that existing and near-term surveys will find tens to hundreds of long-duration gamma-ray bursts (LGRBs), driven primarily by detections of the reverse shock emission, and including off-axis LGRBs. Next-generation experiments (CMB-S4, CMB-HD) will find tens of FBOTs in the nearby universe and will detect a few tidal disruption events. CMB-HD will additionally detect a small number of short gamma-ray bursts, where these will be discovered within the detection volume of next-generation gravitational wave experiments like the Cosmic Explorer.
Constraining Nucleosynthesis in Neutrino-driven Winds: Observations, Simulations, and Nuclear Physics
Authors: Psaltis A. , Arcones A. , Montes F. , Mohr P. , Hansen C. J. , Jacobi M. , Schatz H. 
Published: August 2022

Abstract
A promising astrophysical site to produce the lighter heavy elements of the first r-process peak (Z = 38 − 47) is the moderately neutron-rich (0.4 < Y

e
< 0.5) neutrino-driven ejecta of explosive environments, such as core-collapse supernovae and neutron star mergers, where the weak r-process operates. This nucleosynthesis exhibits uncertainties from the absence of experimental data from (α, xn) reactions on neutron-rich nuclei, which are currently based on statistical model estimates. In this work, we report on a new study of the nuclear reaction impact using a Monte Carlo approach and improved (α, xn) rates based on the Atomki-V2 α optical model potential. We compare our results with observations from an up-to-date list of metal-poor stars with [Fe/H] < −1.5 to find conditions of the neutrino-driven wind where the lighter heavy elements can be synthesized. We identified a list of (α, xn) reaction rates that affect key elemental ratios in different astrophysical conditions. Our study aims to motivate more nuclear physics experiments on (α, xn) reactions using the current and new generation of radioactive beam facilities and also more observational studies of metal-poor stars.
Extreme X-Ray Reflection in the Nucleus of the Seyfert Galaxy NGC 5033
Authors: Yun S. B. , Miller J. M. , Barret D. , Stern D. , Brandt W. N. , Brenneman L. , Draghis P. , Fabian A. C. , Raymond J. , Zoghbi A. 
Published: August 2022

Abstract
NGC 5033 is an intriguing Seyfert galaxy because its subclassification may change with time, and because optical and submillimeter observations find that the massive black hole does not sit at the dynamical center of the galaxy, pointing to a past merger. We obtained a new optical spectrum of NGC 5033 using the 200″ Hale telescope at Palomar that clearly reveals a broad Hβ line (FWHM = 5400 ± 300 km s−1). This signals a clear view of the optical broad line region and requires Seyfert-1.5 designation. Some spectra obtained in the past suggest a Seyfert-1.9 classification, potentially signaling a variable or “changing-look” geometry. Our analysis of a 2019 Chandra spectrum of the massive black hole reveals very little obscuration, also suggesting a clean view of the central engine. However, the narrow Fe Kα emission line is measured to have an equivalent width of EW

=

460

−
90

+
100

eV. This value is extremely high compared to typical values in unobscured active galactic nuclei . Indeed, the line is persistently strong in NGC 5033: the line equivalent width in a 2002 XMM-Newton snapshot is EW

=

250

−
40

+
40

eV, similar to the EW

=

290

−
100

+
100

eV equivalent width measured using ASCA in 1999. These results can likely be explained through a combination of an unusually high covering factor for reflection, and fluxes that are seen out of phase owing to light travel times. We examine the possibility that NGC 5033 may strengthen evidence for the X-ray Baldwin effect.
Ultraviolet Spectroscopy of Lucy Mission Targets with the Hubble Space Telescope
Authors: Humes Oriel A. , Thomas Cristina A. , Emery Joshua P. , Grundy Will M. 
Published: August 2022

Abstract
The recently launched Lucy mission aims to understand the dynamical history of the solar system by examining the Jupiter Trojans, a population of primitive asteroids co-orbital with Jupiter. Using the G280 grism on the Hubble Space Telescope’s Wide Field Camera 3, we obtained near-ultraviolet spectra of four of the five Lucy mission targets—(617) Patroclus–Menoetius, (11351) Leucus, (3548) Eurybates, and (21900) Orus—to search for novel spectral features. We observe a local reflectance minimum at 0.4 μm accompanied by an increase in reflectance from 0.35 to 0.3 μm in the spectra of Patroclus and Orus. We use the principles of Rayleigh scattering and geometric optics to develop a Hapke optical model to investigate whether this feature can be explained by the presence of submicroscopic grains on Trojan surfaces. The near-ultraviolet “bump” feature can be explained by scattering due to fine-grained opaques (iron, amorphous carbon, or graphite) with grain sizes ranging from 20 to 80 nm.
Le sens contraire à travers les deux bases lexicales - ma et -jɔ en ikwere
Authors: Osu Sylvester N. 
Published: August 2022

Il n’est pas rare de considérer, du moins intuitivement, deux unités prises dans une langue comme ayant entre elles un rapport de sens contraire. Sans s’appesantir sur le bien-fondé d’une telle considération, cet article tente d’apporter une illustration supplémentaire de ce phénomène dans sa complexité à travers deux racines verbales -ma et -jɔ de la langue ikwere (parlée au Nigeria). Ces racines participent à la construction d’unités dont les sens (beauté et laideur physique et/ou morale) s’opposent. Toutefois, l’examen d’une série d’exemples révèle qu’une telle opposition de sens n’est pas systématique et constante, elle connaît des limites.
Male Waithood and Radical Transformation in A. Igoni Barrett’s Blackass
Authors: Adejunmobi Moradewun 
Published: August 2022

S’inspirant des nombreux travaux de recherche portant sur la transition de l’enfance à l’âge adulte d’un point de vue social en Afrique, cet article se penche sur le roman Blackass (2015) d’Igoni Barrett afin d’analyser les réactions au retardement du passage à l’âge adulte dans une population africaine dont la mobilité sociale est orientée vers le bas. Il examine la façon dont les diverses dispositions comprises dans le concept de « waithood » (ou état d’attente) identifiées par les chercheurs, telles que l’attente, l’espoir, l’arnaque et la prise de risque, entre autres, se manifestent dans le roman de Barrett. La transformation soudaine du protagoniste masculin en homme blanc est lue ici comme la métaphore d’une condition désormais courante du sujet postcolonial : le désir d’un certain type de transformation rapide et radicale comme solution à l’état d’attente. Bien que le privilège blanc soit certainement un thème central dans Blackass , l’article propose d’interpréter ce roman comme une exploration des types de transformations soudaines qui pourraient être embrassées et célébrées par les jeunes Africains qui se trouvent dans un état d’attente. Le roman étudie également les divers effets produits par les formes de transformation radicale que cette population considère comme un moyen de sortir de l’état d’attente.
Tu vois/vous voyez en synchronie : contraintes distributionnelles et valeurs sémantico-pragmatiques
Authors: Rouanne Laurence 
Published: August 2022

Cette étude examine les emplois du marqueur discursif tu vois / vous voyez en emploi autonome et exclusivement d’un point de vue synchronique. Sur la base d’une conception syntagmatique de la description sémantique, il s’agira de voir dans quelle mesure l’environnement discursif affecte la dimension instructionnelle du marqueur, générant des effets de sens, dans la mesure où sont pris en compte le contexte linguistique, la situation de parole et les savoirs convoqués. Le rôle des éléments pragmatiques que tu vois articule seront spécifiés, permettant ainsi de distinguer deux valeurs du marqueur. Il sera montré, en outre, que ces valeurs sont indépendantes de la place qu’occupe tu vois dans l’énoncé.
Revenir à la maison après l’accouchement
Authors: Garand Marie-Pierre 
Published: August 2022

Revenir à la maison après l’accouchement : Analyse des difficultés rencontrées par les jeunes mères. Cette question a permis d’étudier à partir d’interviews de femmes qui ont récemment accouché, les circonstances de leur retour à la maison, et d’identifier les problèmes qui se sont posés à elles. En soulignant le concept de représentation sociale, nous concluons que certaines difficultés rencontrées proviennent d’une image d’elles-mêmes dépréciée, image acquise par référence à un idéal, celui de la mère parfaite et d’un savoir qu’elles pensent ne pas avoir. Les propositions d’action accentuent le changement dans les rôles à la fois de la mère et du personnel soignant et dans la nature de l’éducation donnée pendant la grossesse.
Décontamination en endoscopie
Authors: Birot Paule , Hertier Michèle , Roche Françoise 
Published: August 2022

L’évolution de l’endoscopie a bouleversé les méthodes traditionnelles de la médecine et de la chirurgie. Les techniques d’endoscopie ont énormément progressé, et c’est une discipline qui avance à pas de géant dans le domaine diagnostique et thérapeutique. Les endoscopes et le matériel d’endoscopie (non autoclavables) posent un difficile problème d’hygiène hospitalière, ne pouvant supporter n’importe quelle méthode de désinfection. Pourquoi l’impossibilité de stériliser ce matériel entre chaque intervention favoriserait-il le premier patient au détriment du dernier ? Nous avons donc pris la décision d’étudier ce problème. Notre méthodologie a comporté plusieurs étapes : étude et analyse de la situation dans différents services, hôpitaux, et fabricants de produits, recherche documentaire (très riche), élaboration de notre cadre conceptuel se basant sur l’étude du matériel d’endoscopie, et sur les notions d’hygiène : DÉCONTAMINATION, DÉSINFECTION et STÉRILISATION, mise en place d’une nouvelle procédure au bloc opératoire, et dans un service d’endoscopie, EVALUATION de ce nouveau protocole faite sur plusieurs mois, à partir de 2 principes : l’analyse bactériologique des produits utilisés au cours des différentes étapes, la surveillance des malades ayant subi un geste endoscopique (comptage des problèmes inflammatoires ou infectieux), Cette recherche a entraîné naturellement un « effet de halo » que nous avons essayé de mettre en évidence. Bien sûr, il a été tenu compte des notions d’efficacité par rapport au coût de la méthode.