bluuebunny/crossref_metadata_2025_split huggingface dataset:
Integral Numerik: Teknik Analitik dan Numerik dalam Analisis Gelombang dan Osilasi
Authors: Erguna Eliandro Junior Tarigan  , Alfidorino Flapianus bukit  , Rizky Iqna Fitria  , Vauline Christin Octavia Siregar  
Published: November 2024

Mathematically, in calculating oscillations and waves, it can be used using analytical and numerical techniques. For simple movements, numerical techniques are easier to perform than analytical techniques. Because, apart from the difficulty of using analytical techniques, the calculations carried out are also complex. The actual value of a wave or oscillation can be determined using analytical techniques, while numerical techniques are simply calculations carried out close to the analytical value. The aim of this paper is to analyze analytical and numerical techniques in wave and oscillation analysis. The type of research used in this research is based on qualitative research. The results obtained in determining trigonometric integrals require a calculation that can use analytical and numerical techniques. Numerical techniques are calculations that are almost correct or close to the value. However, to get the actual value correctly, analytical calculations are needed. Analytical calculations are quite difficult to do, but need to be done to serve as a reference. The conclusion drawn is that in trigonometric integrals in wave and oscillation analysis, numerical calculation techniques and analytical techniques can be used. When using numerical techniques, you can use formulas
, whereas calculations using analytical techniques can use formulas.
Penerapan Metode Clustering Untuk Mengetahui Kepatuhan Wajib Pajak Bumi Dan Bangunan Pada Desa Perkebunan Tanjung Keliling
Authors: Ratna Cantika  , Achmad Fauzi  , Anton Sihombing  
Published: November 2024

Land and Building Tax (PBB) is a type of area regulated by the government in determining the amount of tax for implementation and development as well as increasing the prosperity and well-being of the people. Based on taxpayer compliance data in Tanjung Keliling Plantation, the results of tests carried out using the Clustering algorithm can determine the variables of ownership area, hamlet name and payment level. Clusters 1,2,3 of 600 PBB taxpayer data, namely where cluster 1 has 166 data, can be grouped based on the Ownership Area of "500,001-600,000m2" with the Hamlet Name "Ujung Bangun" and the Payment Level "Quite Good". Cluster 2 consists of 196 data, which can be grouped based on ownership area "200,001-300,000m2" with the hamlet name "Karang Jati" and payment level "fairly good". And Cluster 3 with a total of 238 data, can be grouped based on the Ownership Area "400,001-500,000m2" with the Hamlet Name "Mojosari" and the Payment Level "Quite Good".
A pharmacognostic, phytochemical, and antioxidant potential of Oxalis triangularis
Authors: Sharma S. , Bhuyan N. R. , Mohanty J. P. 
Published: November 2024

Background: To evaluate Oxalis triangularis with pharmacognostical parameters (macroscopy, microscopy & physico-chemical analysis), phytochemical analysis, and to investigate the in-vitro antioxidant capacity of different extracts obtained. Methods: Using specific standard protocols, the following tests were performed: loss on drying, extractive value, ash value, t.s. & powder microscopy, fluorescence analysis, and phytochemical screening. The Folin-Ciocalteu technique was adopted to ascertain the amount of phenolic compounds. In-vitro antioxidant activity was evaluated using 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) & 2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging assays. Results: The extractive values varied between solvents, ranging from 1.28% (ethyl acetate) to 18.8% (water), while the ash values were 16.25% (total), 2.9% (acid insoluble), and 10.625% (water-soluble). Numerous vascular systems, lignified trichomes, and calcium oxalate crystals were visible under a microscope. Saponins, steroids, flavonoids, phenols, anthocyanins, and alkaloids were detected by phytochemical screening; glycosides were not detected. At 200 µg/ml, the phenolic concentration of the ethanolic extract was the highest, at 1151.7 ± 59.22 µg/ml. The ethanolic extract exhibited greater DPPH (IC50 = 2.403 µg/ml) and ABTS (IC50 = 22.94 µg/ml) radical scavenging activity in comparison to the aqueous extract, i.e., (DPPH, IC50= 76.67 µg/ml & ABTS, IC50= 43.52 µg/ml). In contrast, both extracts showed notable antioxidant activity. Conclusion: A comprehensive examination of Oxalis triangularis revealed a rich reservoir of bioactive chemicals, such as phenols, which make the plant rich in antioxidant properties. This may serve as a foundation for the discovery of novel medicines.
Diseño de Mezclas de Hormigon con Escoria de Fundición
Authors: Ríos Condori Alex Rodrigo , Calisaya Chachaqui Abdías 
Published: November 2024

La presente investigación está centrada en la elaboración de mezclas de hormigón los cuales están compuestos por cemento, agregado grueso (grava de canto rodado), agregado fino (arena de canto rodado) y agua. Para dicha elaboración de mezclas se debe realizar una serie de ensayos en laboratorio y sus respectivos cálculos en gabinete. Para verificar la calidad de los agregados a emplear, y el cumplimiento para su aplicación con base a normas establecidas ASTM, AASHTO, ACI. Como resultado de la sustitución del agregado grueso, se evidencio la buena aceptación del material de escoria para la elaboración de mezclas de hormigón aumentando la resistencia y adherencia, pero de manera desfavorable se evidencia el aumento de peso específico.
PÉRDIDA DE SUELO POR EROSIÓN HÍDRICA EN DOS SISTEMAS DE LABRANZA EN EL DISTRITO DE CAPITÁN MEZA - ITAPÚA
Authors: Venialgo Chavez Rosa Nelly , Vera López Wilfrido , Insfran Amado 
Published: November 2024

El presente trabajo tiene como objetivo fundamental comparar los efectos de la erosión hídrica de los suelos cultivados en dos sistemas de labranzas, la labranza convencional o sistema Convencional (SC) y la Siembra Directa (SD). Consistiendo la labranza convencional en la preparación o remoción del suelo antes de la siembra con implementos de roturación del suelo como el arado y la rastra niveladora; por su parte la siembra Directa es la práctica de siembra o de cultivo de plantas sin preparación física del suelo, manteniendo la planta o rastrojo del cultivo anterior en la superficie, implica no remoción del suelo, apenas una roturación en la hilera de siembra para depositar la semilla. Las parcelas demostrativas están ubicadas en una región con un suelo de origen basáltico correspondiente a la clasificación de Rhodic paleudults arcillosa muy final. El tipo de estudio fue comparativo cuantitativo utilizando los métodos de Correlación e índice de Potencial de Degradación de Suelo (IPD). Las parcelas analizadas fueron de las siguientes dimensiones: 40 m de ancho por 100 metros de largo cada una (4.000 m ), el promedio de pendiente de las parcelas es de 8 %.Los rubros agrícolas sembrados fueron el trigo y la soja; todas las parcelas habían sido sembradas el mismo día y recibieron la misma fertilización química. Los resultados del IPD para ambos sistemas fueron:SC: 0,688 cae dentro del rango ALTO índice de potencialidad de degradación del suelo, lo que indica que en el sistema convencional observado, arrojó un resultado que conforme al método de análisis significa una alerta al sistema de cultivo en condiciones similares de topografía, clima, tipo de suelo, etc., tanto que en SD el nivel de potencialidad es absolutamente menor (0,015). Este hecho se sustenta igualmente en la comparativa de la cantidad erosionada en el periodo de estudio en ambos sistemas, teniendo que alrededor de 98 % de las pérdidas se dieron en el sistema convencional de cultivo teniendo en cuenta el IPD total. Este mismo hecho es sustentado en los valores que dieron el porcentual de suelo erosionado pues el 93,34 % corresponde a este sistema de labranza. El porcentual para ambos sistemas arrojó lo siguientes valores: 1, 66 % de suelo erosionado hubo en el SD y 93, 34 % de suelo erosionado en el SC.
Aprendizaje colaborativo 2.0 en la Educación Superior
Authors: Florentín Núñez María Nieves 
Published: November 2024

En este artículo se demostró que el aprendizaje colaborativo 2.0, aplicada en la educación superior, facilita el desarrollo de habilidades y capacidades básicas para el aprendizaje permanente de los estudiantes. En base a los resultados estadísticos obtenidos de la experiencia colaborativa, se ha demostrado que la mayoría de los estudiantes, desarrollaron dichas habilidades y capacidades básicas, necesarias para el aprendizaje permanente
Evaluation of NGASL Biomarkers and Some Biochemical Parameters in Patients with Renal Disorders in Ramadi City, Iraq
Authors: Hanoon Hind A. , Hayani Dhyauldeen Aftan Al , Mustafa Thana I , Hamid Safa Mohammad , Rasoul Safaa Mohammad Abdel , Atallah Safa Ahmed , Danhash Saleh Mohammad 
Published: November 2024

This study was designed to determine the effect or the relationship between neutrophil gelatinase-associated lipocalin (NGASL) and some kidney function parameters in kidney disorder patients to detect the level of serum markers in kidney disorder patients (acute glomerular nephritis, renal calculi, and acute renal failure) in Ramadi City. 120 male and female samples participated; the present study was divided into three groups of 90 patients (30 acute glomerular nephritis, 30 renal calculi, and 30 acute renal failure) and 30 healthy control individuals. The serum NGASL was measured using an ELISA technique. Kidney function tests (serum creatinine and serum urea, HB, and WBC)) were also measured by the quantitative method. The result showed low significant (p > 0.001) differences in hemoglobin and WBC percent in the acute renal failure group compared with other groups, and when compared between the studied groups, the results showed high significant (p< 0.001) differences in urea and creatinine concentration in the acute renal failure group compared with the AGN and RC groups. On the other hand, the result showed high significant(p<0.001) differences in level of NGASL in Acute Renal Failure group compare with others groups. The correlation between parameters showed a higher negative correlation between Hb with urea, creatinine, and NGASL (r = -0.571, -0.508, and -0.463), respectively. In addition to the higher correlation between urea and creatinine with NGASL (r = 0.670, 0.406),. So can be considered NGASL a biomarker for kidney injury or kidney disorder. That may indicate the NGASL effect of renal disease and may be used as predictive parameters for kidney diseases.
Impact of Tillage Practices and Chickpea Varieties on Nutrient Uptake in a Mungbean-Chickpea Cropping System
Authors: Badole K.D. , Giri M.D. , Akshay D. V. S. 
Published: November 2024

Aims: To study the effect of tillage management on nutrient concentration and uptake of different varieties in chickpea (Cicer arietinum L.) under mungbean-chickpea crop sequence
Study Design: strip plot design.
Place and Duration of Study: Pulses Research Unit, Washim Road, Dr. Panjabrao Deshmukh Krishi Vidyapeeth (Dr. PDKV), Akola, Maharashtra, India during the rabi season of 2019-20.
Methodology: There were four tillage practices and two varieties (eight treatments) replicated five times. Main plot treatments include tillage practices for chickpea crop and Sub plot treatments includes two varieties of chickpea, JAKI-9218 and PDKV-Kanak (AKG-1303).
Results: There were four tillage practices and two varieties (eight treatments) replicated five times. The findings showed that the effect of different tillage treatments and varieties on the nitrogen (% N), phosphorus (% P) and potassium (% K) content in seed and straw of chickpea crop was found non-significant. Nutrient uptake (kg/ha) in seed and straw and total uptake (kg/ha) of nutrient by crop was higher with treatment tractor drawn cultivator + harrowing + sowing + one hoeing + one hand weeding (T1). The variety JAKI-9218 recorded significantly greater nutrient uptake than the PDKV-Kanak.
Conclusion: Nutrient concentration (%) and uptake (kg/ha) in seed and straw and total uptake (kg/ha) of nutrient by crop was higher with treatment tractor drawn cultivator + harrowing + sowing + one hoeing + one hand weeding and JAKI-9218.
How elevated blood alcohol concentration level and identification format affect eyewitness memory: A field study
Authors: Altman Christopher M. , McQuiston Dawn E. , Schreiber Compo Nadja 
Published: February 2019

SummaryResearch shows that alcohol has a small and inconsistent effect on eyewitness recall and no effect on witnesses' lineup decisions. Much of this literature has tested participants with low‐to‐moderate blood alcohol concentration (BAC) levels, and no study has directly examined how identification procedure impacts intoxicated witnesses' decisions. In the present study, bar patrons' (N = 132) BAC levels were recorded before participating in a task. Midway through the task, they were interrupted by an intruder. Participants then recalled the incident via a staged interview and attempted to identify the intruder from a target‐present or target‐absent showup or lineup. Although elevated BAC levels (high as 0.24%) reduced the quantity and quality of information provided, BAC had no effect on witnesses' identification decisions regardless of format. Results highlight the importance of testing witness memory across a broad BAC spectrum and provide evidence that alcohol does not affect witnesses' identification ability.
Pushing PbS/Metal‐Halide‐Perovskite Core/Epitaxial‐Ligand‐Shell Nanocrystal Photodetectors beyond 3 µm Wavelength
Authors: Killilea Niall , Wu Mingjian , Sytnyk Mykhailo , Yousefi Amin Amir Abbas , Mashkov Oleksandr , Spiecker Erdmann , Heiss Wolfgang 
Published: February 2019

AbstractPbS nanocrystals have been proven to be highly suitable for photodetector fabrication by facile solution processing, and have been successfully tested as photosensitive material in imaging devices. So far, their spectral response has been blue‐shifted with respect to that of commercial bulk PbS detectors, due to quantum confinement in nanostructures smaller than the exciton Bohr radius. Here, a PbS nanocrystal synthesis approach is introduced, allowing to surpass this limit, and thus to push the cut‐off wavelength to the value of the bulk material. To avoid self‐absorbance from ligands within the spectral range of the photoconducting signal, an all inorganic metal‐halide‐perovskite is applied to form a semiconducting ligand shell. The photoconductors, which are provided from a single drop, do not only show a record in long wavelength operation for PbS nanocrystal detectors but also a room temperature detectivity > 1010 Jones, which is on par with that of commercial bulk PbS detectors. Combining these properties might find application in future low‐cost infrared imagers, which are currently still elusive due to their high prices.
Interface Engineering for Modulation of Charge Carrier Behavior in ZnO Photoelectrochemical Water Splitting
Authors: Kang Zhuo , Si Haonan , Zhang Suicai , Wu Jing , Sun Yu , Liao Qingliang , Zhang Zheng , Zhang Yue 
Published: February 2019

AbstractPhotoelectrochemical water splitting via consumption of solar energy is considered an alternative approach to address both fossil resource and global warming issues. On the basis of the bottom‐up technique, major strategies have been developed to enrich the complexity of nanostructures by incorporating various functional components to realize outstanding photoelectrochemical (PEC) performance for hydrogen evolution, such as high solar‐to‐hydrogen efficiency and long‐term stability. In such a PEC system, each nanomaterial component individually, and more importantly, together with the formed interfaces, contributes to PEC performance elevation. Specifically, the two types of interfaces that have emerged, i.e., the interfaces between photoelectrodes and electrolytes (solid–liquid contact) and the interfaces inside photoelectrodes (solid–solid contact), have both been effectively engineered to facilitate charge separation and transportation and even enhance the antiphotocorrosion properties. A comprehensive understanding, summary, and review of such interface engineering protocols may provide novel and effective approaches for PEC system designing.
Gap‐Surface Plasmon Metasurfaces for Broadband Circular‐to‐Linear Polarization Conversion and Vector Vortex Beam Generation
Authors: Heiden Jacob T. , Ding Fei , Linnet Jes , Yang Yuanqing , Beermann Jonas , Bozhevolnyi Sergey I. 
Published: February 2019

AbstractThe ability to control and manipulate the polarization state of light is of crucial importance in many modern optical applications ranging from quantum technologies to biomedical sciences. Here, an ultrathin quarter‐wave plate (QWP) with a gap‐surface plasmon metasurface is designed, fabricated, and experimentally demonstrated, allowing for broadband and efficient conversion between circular and linear polarizations with ≈85% average reflectance across a 200 nm wide bandwidth in the near‐infrared range (750–950 nm). Based on the QWP design, a general method is further derived to generate vector vortex beams (VVBs) that possess spatially varied distributions of the polarization vector and carry specified orbital angular momentums by using space‐variant QWP unit cells. The fabricated metasurface exhibits highly efficient VVB generation over a wavelength range from 750 to 950 nm, with average efficiencies of ≈72% and ≈68% for the right circularly polarized and left circularly polarized incident light, respectively. The developed approach allows compact, cost‐effective, and high‐performance polarization converters to be realized, paving the way for the ultimate miniaturization of optical devices with arbitrary control of light fields.
Third‐Harmonic Generation from Plasmonic Metasurfaces Coupled to Intersubband Transitions
Authors: Yu Jaeyeon , Park Seongjin , Hwang Inyong , Kim Daeik , Jung Joo‐Yun , Lee Jongwon 
Published: February 2019

AbstractNonlinear responses in metasurfaces have shown great promise for various applications, such as nonlinear holography, spectroscopy, and novel nonlinear light sources. Metasurfaces that produce nonlinear responses have the advantage of greatly relaxed phase‐matching conditions, which can simplify nonlinear optical systems. However, the practical use of nonlinear metasurfaces with an accessible optical pump source requires giant nonlinear responses. A multi‐quantum‐well‐loaded nonlinear metasurface designed for third‐harmonic generation at λ ≈ 8.9 µm with a record‐high third‐order nonlinear optical response is presented for condensed matter systems in the infrared spectral range of up to 4.4 × 10−14 m2 V−2. About 1.8 × 10−3% third‐harmonic generation power conversion efficiency is experimentally achieved in 400 nm thick metasurfaces with a pump intensity of only 210 kW cm−2. The multi‐quantum‐well structure can be used to produce second‐harmonic generation when combined with properly designed nanoresonators to allow multiple and simultaneous harmonic generations on the same chip.
Nickel‐Catalyzed Annulation of o‐Haloarylamidines with Aryl Acetylenes: Synthesis of Isoquinolone and 1‐Aminoisoquinoline Derivatives
Authors: Xie Hao , Xing Qiaoyan , Shan Zhifei , Xiao Fuhong , Deng Guo‐Jun 
Published: February 2019

AbstractAn efficient method for the synthesis of substituted 1(2H)‐isoquinolone derivatives via nickel‐catalyzed annulation of substituted 2‐halobenzamidines with aryl alkynes in the presence of water is described. Benzo[4,5]imidazo[2,1‐a]isoquinolines were formed as the dominated products when dry dimethyl sulfoxide was used as the solvent. Furthermore, when benzyl substituted amidines were used as the substrates, debenzylation reaction occured to provide various 1‐aminoisoquinoline products.magnified image
Regioselectivity Switch in Palladium‐Catalyzed Allenylic Cycloadditions of Allenic Esters: [4+1] or [4+3] Cycloaddition/Cross‐Coupling
Authors: Li Long , Luo Pengfei , Deng Yuhua , Shao Zhihui 
Published: February 2019

AbstractThe first Pd‐catalyzed asymmetric allenylic [4+1] cycloaddition was successfully developed. Alternatively, tuning the Pd catalyst switched the reactivity toward an unprecedented [4+3] cycloaddition/cross‐coupling. Ligands play a vital role in controlling the reaction pathway, allowing highly selective access to different products from identical substrates. Biological evaluation of the obtained compounds led to the discovery of new antitumor targets. A possible mechanism is proposed, suggesting two interesting catalytic cycles for the cycloaddition with palladium‐butadienyls. This study also demonstrated the potential and utility of allenic esters as 1,4‐biselectrophiles and C4 synthons for participating in cycloaddition reactions.
Migratory Arylboration of Unactivated Alkenes Enabled by Nickel Catalysis
Authors: Wang Wang , Ding Chao , Li Yangyang , Li Zheqi , Li Yuqiang , Peng Long , Yin Guoyin 
Published: February 2019

AbstractAn unprecedented arylboration of unactivated terminal alkenes, featuring 1,n‐regioselectivity, has been achieved by nickel catalysis. The nitrogen‐based ligand plays an essential role in the success of this three‐component reaction. This transformation displays good regioselectivity and excellent functional‐group tolerance. In addition, the incorporation of a boron group into the products provides substantial opportunities for further transformations. Also demonstrated is that the products can be readily transformed into pharmaceutically relevant molecules. Unexpectedly, preliminary mechanistic studies indicate that although the metal migration favors the α‐position of boron, selective and decisive bond formation is favored at the benzylic position.
Peripheral and Central Sensitization of Pain in Individuals With Hand Osteoarthritis and Associations With Self‐Reported Pain Severity
Authors: Steen Pettersen Pernille , Neogi Tuhina , Magnusson Karin , Berner Hammer Hilde , Uhlig Till , Kvien Tore K. , Haugen Ida K. 
Published: February 2019

ObjectivePain sensitization, an important osteoarthritis (OA) pain mechanism, has not been substantially investigated in patients with hand OA. It is unknown how peripheral and central sensitization are related to self‐reported hand pain.MethodsIndividuals with verified hand OA in the Nor‐Hand study underwent quantitative sensory testing of pressure pain thresholds (PPTs) locally (painful and nonpainful finger joints) and remotely (wrist, trapezius, and tibialis anterior muscles), and testing of temporal summation (TS), a manifestation of central sensitization. We examined cross‐sectional associations of PPT tertiles and TS with hand pain using the Numerical Rating Scale (NRS) (range 0–10) and the Australian/Canadian Osteoarthritis Hand Index (AUSCAN) pain subscale (range 0–20). Linear regression models were adjusted for demographics, psychosocial factors, and radiographic severity.ResultsThis study included 282 participants (88% female) with a median age of 61 years (interquartile range [IQR] 57–66). Participants with the lowest PPTs in their finger joints and in most remote locations reported higher NRS pain values, compared to patients with the highest PPTs, with adjusted β values ranging from 0.6 (95% confidence interval [95% CI] 0.0, 1.2) to 0.9 (95% CI 0.3, 1.5). The 118 participants (42%) with TS reported higher mean ± SD NRS pain values compared to those without TS (4.1 ± 2.4 versus 3.1 ± 1.7; adjusted β = 0.6 [95% CI 0.2, 1.1]). Neither PPTs nor the presence of TS were associated with AUSCAN pain.ConclusionCentral sensitization was common in patients with hand OA. Lower local and widespread PPTs and the presence of TS were associated with higher hand pain intensity, even after adjustment for demographics, psychosocial factors, and radiographic severity. Sensitization may therefore represent a possible treatment target.