bluuebunny/crossref_metadata_2025 huggingface dataset:
Wavefield Reconstruction Inversion Based on the Multi-Scale Cumulative Frequency Strategy for Ground-Penetrating Radar Data: Application to Urban Underground Pipeline
Authors: Feng Deshan , Ding Siyuan , Wang Xun , Su Xuan , Liu Shuo , Cao Cen
Published: May 2022

High-precision detection of the underground pipelines is an indispensable part of the development and construction of cities. At present, the inversion technology for ground-penetrating radar (GPR) data is an effective means of realizing shallow-underground-space visualization in the field of geophysical exploration. However, the traditional full-waveform inversion (FWI) method usually faces the problems of strong nonlinearity of the objective function, high dependence on the initial model, and huge calculation cost. For improving the accuracy and efficiency of GPR data inversion, a wavefield reconstruction inversion (WRI) strategy is used for GPR data imaging to reduce the nonlinearity of the inversion problem and the dependence on the initial model. Then, the frequency weighting strategy and the multi-scale method are adopted to avoid the high-frequency component data dominating the optimization process and enhance the stability of inversion. In this paper, two numerical experiments of pipeline models with different materials and spacing or buried depths verified that the proposed method can effectively reconstruct the subsurface pipelines, and further performance of our algorithm on the field data verified the reliability of high-precision imaging of urban underground pipelines, which shows great potential of application in the field of high-precision detection of the urban underground pipelines.
Estimation of Intertidal Oyster Reef Density Using Spectral and Structural Characteristics Derived from Unoccupied Aircraft Systems and Structure from Motion Photogrammetry
Authors: Windle Anna E. , Puckett Brandon , Huebert Klaus B. , Knorek Zofia , Johnston David W. , Ridge Justin T.
Published: May 2022

Eastern oysters (Crassostrea virginica) are an important component of the ecology and economy in coastal zones. Through the long-term consolidation of densely clustered shells, oyster reefs generate three-dimensional and complex structures that yield a suite of ecosystem services, such as nursery habitat, stabilizing shorelines, regulating nutrients, and increasing biological diversity. The decline of global oyster habitat has been well documented and can be attributed to factors, such as overharvesting, pollution, and disease. Monitoring oyster reefs is necessary to evaluate persistence and track changes in habitat conditions but can be time and labor intensive. In this present study, spectral and structural metrics of intertidal oyster reefs derived from Unoccupied Aircraft Systems (UAS) and Structure from Motion (SfM) outputs are used to estimate intertidal oyster density. This workflow provides a remote, rapid, nondestructive, and potentially standardizable method to assess large-scale intertidal oyster reef density that will significantly improve management strategies to protect this important coastal resource from habitat degradation.
A Multi-Sensor Interacted Vehicle-Tracking Algorithm with Time-Varying Observation Error
Authors: Gao Jingjie , Zhang Qian , Sun Huachao , Wang Wei
Published: May 2022

Vehicle tracking in the field of intelligent transportation has received extensive attention in recent years. Multi-sensor-based vehicle tracking system is widely used in some critical environments. However, in the actual scenes, the observation error of each sensor is often different and time varying because of the environmental change and the channel difference. Therefore, in this paper, we propose a multi-sensor interacted vehicle-tracking algorithm with time-varying observation error (MI-TVOE). The algorithm establishes a jointed and time-varying observation error model for each sensor to indicate the variation of observation noise. Then, we develop a multi-sensor interacted vehicle-tracking algorithm which can predict the statistical information of a time-varying observation error and fuse the tracking result of each sensor to provide a global estimation. Simulation results show that the proposed MI-TVOE algorithm can significantly improve the tracking performance compared to the single-sensor-based tracking method, the traditional unscented Kalman filter (UKF), the apdative UKF method (AUKF) and the multi-error fused UKF method (MEF-UKF), which will be well applied to the complex tracking scenes and will reduce the computational complexity with time-varying observation error. The experiments in this paper also prove the superiority of the proposed MI-TVOE algorithm in complex environments.
Individual Wave Propagations in Ionosphere and Troposphere Triggered by the Hunga Tonga-Hunga Ha’apai Underwater Volcano Eruption on 15 January 2022
Authors: Chen Chieh-Hung , Zhang Xuemin , Sun Yang-Yi , Wang Fei , Liu Tien-Chi , Lin Chi-Yen , Gao Yongxin , Lyu Jun , Jin Xiaobing , Zhao Xiaoli , Cheng Xiang , Zhang Pengyu , Chen Qiyu , Zhang Dixin , Mao Zhiqiang , Liu Jann-Yenq
Published: May 2022

The devastating Hunga Tonga-Hunga Ha’apai underwater volcano erupted at ~04:15 UT on 15 January 2022. We captured the waves that erupted from the volcano propagating in the ionosphere by monitoring total electron content (TEC) perturbations utilizing ground-based global navigation satellite system (GNSS) receivers that receive electromagnetic signals transmitted from the geostationary satellites operated by the BeiDou Navigation Satellite System (BDS). Meanwhile, ground barometers detected unusual enhancements of air pressure traveling in the troposphere. A novel phenomenon shows that the waves can individually propagate with a speed of ~335 m/s in the ionosphere, which is faster than its’ ~305 m/s in the troposphere. We further examined multiple geophysical data at the particular site of the novel instrumental array. Analytical results show that the pressure enhancements traveling in the troposphere not only downward trigger ground vibrations mainly in the horizontal components without obvious time difference, but also upward, leading the secondary TEC perturbations with a ~12-min delay.
s-CAM: An Untethered Insertable Laparoscopic Surgical Camera Robot with Non-Contact Actuation
Authors: Li Ning , Liu Hui , Abdolmalaki Reza Yazdanpanah , Mancini Gregory J. , Tan Jindong
Published: May 2022

Fully insertable robotic imaging devices represent a promising future of minimally invasive laparoscopic vision. Emerging research efforts in this field have resulted in several proof-of-concept prototypes. One common drawback of these designs derives from their clumsy tethering wires which not only cause operational interference but also reduce camera mobility. In this paper, a tetherless insertable surgical camera (s-CAM) robot with non-contact transabdominal actuation is presented for single-incision laparoscopic vision. Wireless video transmission and control communication using onboard power help eliminate cumbersome tethering wires. Furthermore, magnetic based camera actuation gets rid of intrinsic physical constraints of mechanical driving mechanisms, thereby improving camera mobility and reducing operational interference. In addition, a custom Bluetooth low energy (BLE) application profile and a real-time operating system (RTOS) based multitask programming framework are also proposed to facilitate embedded software design for insertable medical devices. Initial ex vivo test results of the s-CAM design have demonstrated technical feasibility of a tetherless insertable laparoscopic camera. Effective imaging is confirmed at as low as 500 lx illumination. Wireless laparoscopic vision is accessible within a distance of more than 10 m. Transabdominal BLE communication is stable at over −52 dBm and shows its potential for wireless control of insertable medical devices. RTOS based sfotware event response is bounded within 1 ms while the CPU usage is at 3∼5%. The device is able to work for 50 min with its onboard power. For the mobility, the robot can translate against the interior abdominal wall to reach full abdomen quadrants, tilt between −180∘ and +180∘, and pan in the range of 0∘∼360∘. The s-CAM has brought robotic laparoscopic imaging one step further toward less invasiveness and more dexterity.
9-DOF IMU-Based Attitude and Heading Estimation Using an Extended Kalman Filter with Bias Consideration
Authors: Farahan Sajjad Boorghan , Machado José J. M. , de Almeida Fernando Gomes , Tavares João Manuel R. S.
Published: May 2022

The attitude and heading reference system (AHRS) is an important concept in the area of navigation, image stabilization, and object detection and tracking. Many studies and works have been conducted in this regard to estimate the accurate orientation of rigid bodies. In most research in this area, low-cost MEMS sensors are employed, but since the system’s response will diverge over time due to integration drift, it is necessary to apply proper estimation algorithms. A two-step extended Kalman Filter (EKF) algorithm is used in this study to estimate the orientation of an IMU. A 9-DOF device is used for this purpose, including a 6-DOF IMU with a three-axis gyroscope and a three-axis accelerometer, and a three-axis magnetometer. In addition, to have an accurate algorithm, both IMU and magnetometer biases and disturbances are modeled and considered in the real-time filter. After applying the algorithm to the sensor’s output, an accurate orientation as well as unbiased angular velocity, linear acceleration, and magnetic field were achieved. In order to demonstrate the reduction of noise power, fast Fourier transform (FFT) diagrams are used. The effect of the initial condition on the response of the system is also investigated.
Pilot Study of Embedded IMU Sensors and Machine Learning Algorithms for Automated Ice Hockey Stick Fitting
Authors: Léger Taylor , Renaud Philippe J. , Robbins Shawn M. , Pearsall David J.
Published: May 2022

The aims of this study were to evaluate the feasibility of using IMU sensors and machine learning algorithms for the instantaneous fitting of ice hockey sticks. Ten experienced hockey players performed 80 shots using four sticks of differing constructions (i.e., each stick differed in stiffness, blade pattern, or kick point). Custom IMUs were embedded in a pair of hockey gloves to capture resultant linear acceleration and angular velocity of the hands during shooting while an 18-camera optical motion capture system and retroreflective markers were used to identify key shot events and measure puck speed, accuracy, and contact time with the stick blade. MATLAB R2020a’s Machine Learning Toolbox was used to build and evaluate the performance of machine learning algorithms using principal components of the resultant hand kinematic signals using principal components accounting for 95% of the variability and a five-fold cross validation. Fine k-nearest neighbors algorithms were found to be highly accurate, correctly classifying players by optimal stick flex, blade pattern, and kick point with 90–98% accuracy for slap shots and 93–97% accuracy for wrist shots in fractions of a second. Based on these findings, it appears promising that wearable sensors and machine learning algorithms can be used for reliable, rapid, and portable hockey stick fitting.
FPI Based Hyperspectral Imager for the Complex Surfaces—Calibration, Illumination and Applications
Authors: Raita-Hakola Anna-Maria , Annala Leevi , Lindholm Vivian , Trops Roberts , Näsilä Antti , Saari Heikki , Ranki Annamari , Pölönen Ilkka
Published: May 2022

Hyperspectral imaging (HSI) applications for biomedical imaging and dermatological applications have been recently under research interest. Medical HSI applications are non-invasive methods with high spatial and spectral resolution. HS imaging can be used to delineate malignant tumours, detect invasions, and classify lesion types. Typical challenges of these applications relate to complex skin surfaces, leaving some skin areas unreachable. In this study, we introduce a novel spectral imaging concept and conduct a clinical pre-test, the findings of which can be used to develop the concept towards a clinical application. The SICSURFIS spectral imager concept combines a piezo-actuated Fabry–Pérot interferometer (FPI) based hyperspectral imager, a specially designed LED module and several sizes of stray light protection cones for reaching and adapting to the complex skin surfaces. The imager is designed for the needs of photometric stereo imaging for providing the skin surface models (3D) for each captured wavelength. The captured HS images contained 33 selected wavelengths (ranging from 477 nm to 891 nm), which were captured simultaneously with accordingly selected LEDs and three specific angles of light. The pre-test results show that the data collected with the new SICSURFIS imager enable the use of the spectral and spatial domains with surface model information. The imager can reach complex skin surfaces. Healthy skin, basal cell carcinomas and intradermal nevi lesions were classified and delineated pixel-wise with promising results, but further studies are needed. The results were obtained with a convolutional neural network.
A Time-Driven Cloudlet Placement Strategy for Workflow Applications in Wireless Metropolitan Area Networks
Authors: Zhang Jianshan , Li Ming , Zheng Xianghan , Hsu Ching-Hsien
Published: May 2022

With the rapid development of mobile technology, mobile applications have increasing requirements for computational resources, and mobile devices can no longer meet these requirements. Mobile edge computing (MEC) has emerged in this context and has brought innovation into the working mode of traditional cloud computing. By provisioning edge server placement, the computing power of the cloud center is distributed to the edge of the network. The abundant computational resources of edge servers compensate for the lack of mobile devices and shorten the communication delay between servers and users. Constituting a specific form of edge servers, cloudlets have been widely studied within academia and industry in recent years. However, existing studies have mainly focused on computation offloading for general computing tasks under fixed cloudlet placement positions. They ignored the impact on computation offloading results from cloudlet placement positions and data dependencies among mobile application components. In this paper, we study the cloudlet placement problem based on workflow applications (WAs) in wireless metropolitan area networks (WMANs). We devise a cloudlet placement strategy based on a particle swarm optimization algorithm using genetic algorithm operators with the encoding library updating mode (PGEL), which enables the cloudlet to be placed in appropriate positions. The simulation results show that the proposed strategy can obtain a near-optimal cloudlet placement scheme. Compared with other classic algorithms, this algorithm can reduce the execution time of WAs by 15.04–44.99%.
A Blockchain-Based Privacy Information Security Sharing Scheme in Industrial Internet of Things
Authors: Wang Yue , Che Tingyu , Zhao Xiaohu , Zhou Tao , Zhang Kai , Hu Xiaofei
Published: May 2022

Due to the competitive relationship among different smart factories, equipment manufacturers cannot integrate the private information of all smart factories to train the intelligent manufacturing equipment fault prediction model and improve the accuracy of intelligent manufacturing equipment fault detection. The use of a low fault recognition rate model for smart factories will cause additional losses for them. In this work, we propose a blockchain-based privacy information security sharing scheme in Industrial Internet of Things (IIoT) to solve the sharing problem of private information in smart factories. Firstly, we abstract smart factories as edge nodes and build decentralized, distributed trusted blockchain networks based on Ethereum clients on simulated edge devices and propose an Intelligent Elliptic Curve Digital Signature Algorithm (IECDSA) to guarantee the ownership of shared information by edge nodes. Secondly, we propose the Reputation-based Delegated Proof of Stake (RDPoS) consensus algorithm to improve the security and reliability of the Delegated Proof of Stake (DPoS) consensus algorithm. Furthermore, we design and implement an incentive mechanism based on information attributes to increase the motivation of edge nodes to share information. Finally, the proposed solution is simulated. Through theoretical and simulation experiments, it is proved that the blockchain-based privacy information security sharing scheme in IIoT can improve the enthusiasm of edge nodes to share information on the premise of ensuring the security of information sharing.
Free Space Ground to Satellite Optical Communications Using Kramers–Kronig Transceiver in the Presence of Atmospheric Turbulence
Authors: Naghshvarianjahromi Mahdi , Kumar Shiva , Deen M. Jamal
Published: May 2022

Coherent detection provides the optimum performance for free space optical (FSO) communication systems. However, such detection systems are expensive and require digital phase noise compensation. In this paper, the transmission performance of long-haul FSO system for ground-to-satellite communication based on a Kramers–Kronig (KK) transceiver is evaluated. KK transceivers utilize inexpensive direct detection receivers and the signal phase is retrieved from the received current using the well-known KK relations. KK transceivers are not sensitive to the laser phase noise and, hence, inexpensive lasers with large linewidths can be used at the transmitter. The transmission performance of coherent and KK transceivers is compared in various scenarios such as satellite-to-ground, satellite-to-satellite, and ground-to-satellite for weak, moderate, and strong turbulence. The results show that the transmission performance of a system based on the KK transceiver is comparable to that based on a coherent transceiver, but at a significantly lower system cost and complexity. It is shown that in the absence of turbulence, the coherent receiver has a ~3 dB performance advantage over the KK receiver. However, in the presence of strong turbulence, this performance advantage becomes negligible.
Statistical Analysis of Differentiation of the Development of Territories Based on the Assessment of the Effectiveness of the Use of Tax Potential (Case Study: Municipalities of the Tambov Region)
Authors: Mkhitaryan V. S. , Popova G. L.
Published: May 2022

The article discusses directions for improving the methodology of interterritorial differentiation analysis based on the assessment of the effectiveness of the use of tax potential (on the example of the Tambov region).

In the introductory part of the article on the basis of official domestic statistics the authors characterize features of the constituent entity of the Russian Federation under consideration. This is necessary for a well-founded interpretation of the results of an interterritorial comparative analysis of the effectiveness of the formation and use of tax revenues – an important component of the municipal budget.

The main part sets out methodological principles for calculating the generalizing indicator of the effectiveness of the realized tax potential of municipalities; data from the Federal State Statistics Service and the Federal Tax Service are used as sources of information.

Based on the methodology recommended by the authors, an interregional analysis of the effectiveness of the tax potential in 2013 (before sanctions and anti-sanctions measures were introduced in 2014) and 2019 (before the start of the coronavirus pandemic in 2020) was carried out.

The paper reveals interregional differences in the dynamics of the gross regional product (GRP), the intensity of structural shifts, the size and changes in tax revenues. The existing differences between the urban and rural areas of the Tambov region are studied in terms of the efficiency of using their tax potentials.

Based on the conducted statistical analysis, the authors come to the conclusion that in the ranking according to the generalizing indicator of the efficiency of the realized tax potential of municipalities of the Tambov region, there is a decrease in the positions of cities. At the same time, there is an increase in agricultural production in the region due to the implementation of Russia's food security strategy. In this regard, it is suggested that agriculture will stimulate the development of manufacturing industries in cities, which will result in the improve in their ranking.
Statistical and Sociological Study of Institutional Transformation of Russian Business (Case Study: Moscow and the Moscow Region)
Authors: Goreeva N. M. , Demidova L. N. , Sadovnikova N. A.
Published: May 2022

The article present argument for using statistical methods, which evaluate factors that contribute to or, on the contrary, hinder the institutional transformation of entrepreneurship in Russia.

The authors analyzed materials of the sociological survey of large and medium-sized enterprises carried out in 2019 through questionnaires administered to company executives based on a sample of economic entities in Moscow and Moscow region. A set of statistical data from a survey of company executives was formed for two groups of enterprises, depending on the scale of production. They were differentiated according to the main factors of sustainable development.Using the χ2 criterion, the degree of similarity of these populations and their correspondence to one type of distribution was revealed. The results of the survey of company executives showed that the key factors for the sustainable functioning of enterprises and their further development are: the availability of new technologies for implementation in production, the degree of personnel qualification, as well as the extent to which specialists from other commercial structures are involved in the work. At the same time, the first indicated factors which are determinantsof any group of economic entities, regardless of the scale of entrepreneurial activity. A significant difference in the opinions of the company executives of large and medium-sized enterprises is observed in the answers to the question about the sources of funds for doing business.

Evaluation of negative-impact factors of crisis phenomena is differentiated depending on the scale of production using various criteria. Thus, when using White's t-test, no fundamental differences were found between the estimates of the company executivesof economic entities that are in different groups in terms of the scale of production activities. As for the positive factors, where all observations are pairwise conjugated, the Wilcoxon test was used, which indicates that entrepreneurs equally assess the degree of influence of negative and positive causes of the crisis on business. Based on empirical analysis, was confirmed the hypothesis about determining factors influencing the current situation with business. According to entrepreneurs, such factors are high taxes and the lack of working capital.

Amid a spiraling crisis and import substitution, continuous monitoring of both weaknesses and strengths of the development of large and medium enterprises allows to identify key predictors that contribute to the most efficient functioning of such enterprises.
A Review of Imaging Methods to Assess Ultrasound-Mediated Ablation
Authors: Fite Brett Z. , Wang James , Ghanouni Pejman , Ferrara Katherine W.
Published: May 2022

Ultrasound ablation techniques are minimally invasive alternatives to surgical resection and have rapidly increased in use. The response of tissue to HIFU ablation differs based on the relative contributions of thermal and mechanical effects, which can be varied to achieve optimal ablation parameters for a given tissue type and location. In tumor ablation, similar to surgical resection, it is desirable to include a safety margin of ablated tissue around the entirety of the tumor. A factor in optimizing ablative techniques is minimizing the recurrence rate, which can be due to incomplete ablation of the target tissue. Further, combining focal ablation with immunotherapy is likely to be key for effective treatment of metastatic cancer, and therefore characterizing the impact of ablation on the tumor microenvironment will be important. Thus, visualization and quantification of the extent of ablation is an integral component of ablative procedures. The aim of this review article is to describe the radiological findings after ultrasound ablation across multiple imaging modalities. This review presents readers with a general overview of the current and emerging imaging methods to assess the efficacy of ultrasound ablative treatments.
EFEITOS DO ÓLEO DE GIRASSOL OZONIZADO NO TRATAMENTO DE FERIDA CIRÚRGICA EM GATAS SUBMETIDAS A OVARIOHISTERECTOMIA ELETIVA
Authors: Cabral de Souza Rafaela , Gonçalves Dias Rafaela Andréa , De Santos Jesus Maria de Lourdes , Oliveira de Araújo Barreto Cinthia , Santos de Andrade Eunice , Carneiro de Araújo Machado Marília
Published: May 2022

Pesquisas recentes comprovam a eficácia da ozonioterapia no estímulo à cicatrização de feridas em animais. O objetivo deste trabalho foi avaliar o efeito cicatrizante do óleo de girassol ozonizado na ferida cirúrgica de gatas submetidas a ovariohisterectomia eletiva, em comparação à utilização do soro fisiológico e óleo de girassol puro, com descrição da evolução da cicatrização e a área de retração da ferida nos diferentes grupos experimentais estudados. Para tal, foram estudadas 15 gatas, divididas de forma aleatória em 3 grupos experimentais, sendo cada grupo constituído por 5 animais, dispostos da seguinte forma: Grupo 1 (controle), constituídos de animais que utilizaram apenas solução fisiológica 0,9% para limpeza da ferida cirúrgica; Grupo 2, constituído de animais que utilizaram a solução fisiológica e óleo de girassol puro; e Grupo 3, constituído de animais que utilizaram a solução fisiológica e óleo de girassol ozonizado. Inicialmente todas as gatas foram submetidas ao exame clínico completo, avaliação ultrassonográfica e exames hematológicos como avaliação pré-operatória para ovariohisterectomia eletiva. Durante o período pós-operatório os animais foram acompanhados diariamente, por 7 dias, para observação da ferida cirúrgica, sendo esta avaliada quanto ao seu tamanho, presença de edema, hiperemia, exsudação, granulação e crostas. Os resultados obtidos revelaram que, quanto ao tamanho da ferida, houve maior retração cicatricial no grupo 3 (78%), quando comparado ao grupo 1 (34%) e o grupo 2 (64%), com diferença significativa (p=0,039). Ademais, observou-se redução significativa do edema (p=0,035) e hiperemia (p=0,04) no grupo 3, ao comparar com o grupo 1 e 2, sendo mais evidente no 3º dia de tratamento. O uso do óleo de girassol ozonizado demonstrou ser benéfico ao processo cicatricial, promover rápida reparação da lesão, favorecendo o restabelecimento da estrutura e função dos tecidos.
CAROTENOIDES EN TAGETES ERECTA L. LA MODIFICACIÓN GENÉTICA COMO ALTERNATIVA
Authors: Del Villar-Martínez Alma Angélica , Serrato-Cruz Miguel Ángel , Solano-Navarro Araceli , Arenas-Ocampo Martha Lucía , Quintero-Gutiérrez Adrián Guillermo , Sánchez-Millán José Luis , Evangelista-Lozano Silvia , Jiménez-Aparicio Antonio , García-Jiménez Federico Alfredo , Vanegas-Espinoza Pablo Emilio
Published: May 2022

El cempasúchil (Tagetes erecta L.) es una planta originaria de México y sus flores acumulan carotenoides, principalmente luteína. Los pigmentos del cempasúchil se utilizan como aditivos en la elaboración de alimentos para aves, peces y crustáceos, y así mejorar el aspecto de éstos para el consumo humano. Existen estudios en los que se relacionan a los carotenoides con la prevención de algunas enfermedades oculares asociadas con la edad, como las cataratas y la degeneración macular, los cuales han producido resultados interesantes y han promovido el avance en otras áreas del conocimiento relacionadas con estos compuestos, como el mejoramiento de los carotenoides para su utilización en alimentos de consumo común, a través del uso de técnicas de ingeniería genética.
FENOLOGÍA, EFICIENCIA PRODUCTIVA Y CALIDAD DE FRUTA DE CULTIVARES DE NARANJO EN EL TRÓPICO SECO DE MÉXICO
Authors: Medina-Urrutia Víctor Manuel , Zapiaín-Esparza Gilberto , Robles-González Marciano Manuel , Pérez-Zamora Octavio , Orozco-Santos Mario , Williams Timothy , Becerra-Rodríguez Salvador
Published: May 2022

En este estudio se evaluó el comportamiento fenológico, crecimiento, rendimiento, eficiencia productiva y calidad de fruta de 19 cultivares de naranjo (Citrus sinensis (L) Osbeck) en condiciones de trópico seco (Bs1) de Colima, México. Los cultivares se agrupan en tres tipos: a) Valencia: ‘Delta’, ‘San Miguel’, ‘Cutter’, ‘Campbell’, ‘Frost’, ‘Olinda’, ‘Midknight’, ‘Shamouti’ y ‘Late’; b) Navel: ‘Fisher’, ‘Lane Late’, ‘Atwood’ y ‘Cara Cara’; y c) Comunes: ‘Pineapple’, ‘Ruby’, ‘Queen’, ‘Trovita’, ‘Marrs’ y ‘Crescent’. Todos estuvieron injertados sobre naranjo agrio (Citrus aurantium L.) y se plantaron a una distancia de 8 x 4 m en suelo migajón arcillo-arenoso con pH de 8.3. Todos los cultivares mostraron épocas similares de brotación vegetativa y floración. La floración principal ocurrió de mediados de febrero a principios de marzo, sobre brotes vegetativos que emergieron al comenzar las lluvias en julio. Los cultivares con mayor volumen de copa fueron ‘Pineapple’ (82 m3 ) y ‘Crescent’ (76 m3 ), seguidos de ‘Shamouti’ (74 m3 ) y ‘Fisher’ (71.3 m3 ); ‘Midknigth’ (26.3 m3 ) tuvo el menor volumen. Los cultivares más productivos fueron ‘Pineapple’ (35 t ha-1), seguido de ‘Cutter’ y ‘Delta’ (29 y 30 t ha-1 respectivamente) y ‘Ruby’ (25 t ha-1), los cuales también fueron los más eficientes para producir fruta. ‘Queen’, ‘Pineapple’, ‘Marrs’, ‘Ruby’, ‘Trovita’, ‘Crescent’, ‘San Miguel’ y los tipo Navel se comportaron como cultivares tempranos ya que registraron el índice de cosecha superior a 8.5 en agosto. Los demás cultivares maduraron entre octubre y noviembre. Los valores de sólidos solubles totales (SST), acidez, relación SST/acidez y contenido de jugo en la fruta de la mayoría de cultivares estuvieron dentro de los estándares de calidad, aunque en ellos predominó el color verde a verde amarillo de la cáscara al momento de la cosecha. Los cultivares Navel mostraron bajo rendimiento. ‘Shamouti’ y ‘Midknight’ fueron improductivos.
EVALUACIÓN DE CINCO ESPECIES VEGETALES COMO CULTIVOS DE COBERTURA EN VALLES ALTOS DE MÉXICO
Authors: Navarro-Garza Hermilio , Pérez-Olvera Ma. Antonia , Castillo-González Fernando
Published: May 2022

En este estudio se comparó la aptitud de cobertura vegetal del suelo y las principales características agronómicas, de cinco especies vegetales establecidas en Nonoalco (2250 msnm) e Ixayoc (2500 msnm), en el noreste del Estado de México. Las especies fueron: frijol ayocote (Phaseolus coccineus), dos variedades de haba (Vicia faba, var ‘Purépecha’ y ‘V-35’), veza (Vicia sativa), y avena (Avena sativa, var Saia), en un diseño experimental bloques al azar con tres repeticiones, en parcelas experimentales de 6 x 4 m. Ayocote y haba fueron sembradas en surcos, veza y avena sembradas al voleo. Las variables evaluadas fueron cobertura del suelo y altura de planta, en cuatro fechas; producción de biomasa a 70 días y a la cosecha, y rendimiento de grano o forraje. La mejor cobertura la registraron avena y veza en ambos sitios; en Nonoalco el ayocote registró un comportamiento similar. La avena registró más crecimiento en ambos sitios y la veza registró el segundo mejor comportamiento. El haba ‘Purépecha’ registró el menor crecimiento en ambos sitios. Las mayores producciones de biomasa, para el conjunto de poblaciones y durante los dos periodos, fueron obtenidas en Nonoalco debido a sus mejores características físico-químicas del suelo.
Caracterização geoambiental do município de Caxias, Maranhão/Brasil
Authors: Pereira Patricia Barbosa , Nunes Hikaro Kayo de Brito , Sousa Adriano da Silva
Published: May 2022

O presente estudo tem como objetivo realizar uma caracterização geoambiental do município de Caxias, Leste Maranhense, Nordeste Brasileiro. Metodologicamente, foram adotadas etapas de campo e de gabinete, instrumentalizadas principalmente por câmera fotográfica, aparelho de GPS, e utilização do software QGIS (versão 2.18.18) para manipulação de dados primários e secundários. No munícipio foi verificado que há uma carência de estudos sobre essa envergadura na escala municipal, ao passo que existem investigações similares sobre sub-bacias hidrográficas e o núcleo urbano. Contudo, em alguns estudos foram observadas informações contraditórias acerca das características do quadro natural, talvez relacionado à investigação pontual do quadro natural e dos elementos que compõem a paisagem. Os resultados da investigação apontam que Caxias está inserido em uma zona de transição, justificando a presença de variados tipos de formações geológicas, e sua influência para as características geomorfológicas e pedológicas, e, destas, para a distribuição das tipologias de cobertura vegetal.
Novas práticas de consumo em espaços residenciais fechados de Presidente Prudente/SP: mudanças e permanências na produção do espaço urbano
Authors: Messias Sofia Anchieta , Góes Eda Maria
Published: May 2022

Os espaços residenciais fechados da porção Noroeste de Presidente Prudente e, mais especificamente, as práticas dos seus moradores, são investigadas, a partir da recente introdução de atividades comerciais no seu interior. Tomamos como referência a pesquisa anterior sobre a expansão dos Espaços Residenciais Fechados em três cidades médias paulistas, Presidente Prudente, Marília e São Carlos, que resultou no livro “Espaços Fechados e Cidades: insegurança urbana e fragmentação socioespacial” (SPOSITO; GÓES, 2013), com vistas à atualização de alguns de seus resultados, levando em conta as mudanças internas identificadas e suas implicações, em relação aos processos de produção do espaço que estão em curso, com especial atenção aos impactos sobre os espaços públicos.
Análisis de la relación entre el número de odontólogos matriculados en el Distrito I y las necesidades de la comunidad
Authors:   , Tapia Gabriela Edith
Published: May 2022

El análisis de las necesidades de una comunidad, es un tema complejo si queremos abarcarlo en toda su magnitud para un área determinada (un país, una provincia, un centro educacional o laboral o un distrito). Cualquiera de estas poblaciones puede ser estudiada para conocer sus necesidades. La atención o asistencia de la salud implica el conjunto de procesos a partir de los cuales se definen prestaciones y cuidados a un individuo en particular, grupo familiar, comunidad y población. Por esta razón la asistencia sanitaria favorece la fortaleza conservando el estado de salud de las personas, evitando su deterioro en base al conocimiento y recursos disponibles al efecto. Es fundamental inculcar en la comunidad la importancia del conocimiento actualizado acerca de la salud bucal para que adquiera conocimientos básicos, conductas, actitudes, hábitos necesarios para el mantenimiento de la misma. Con respecto al tema se plantea diagnosticar las necesidades de la comunidad relacionándolas con el número de odontólogos capacitados para brindar soluciones. Se diseñó como instrumento para la recolección de datos un cuestionario previamente sometido a juicio de expertos. La participación de los encuestados fue voluntaria, anónima y bajo condiciones controladas. Estos valores porcentuales en la población estudiada contribuirían a la planificación de acciones que permitan cubrir las necesidades en salud bucal de la comunidad. No debe perderse de vista que los datos corresponden a una población determinada y que los datos difieren según el contexto inherente a la muestra explorada. De allí la importancia de evaluar diferentes poblaciones y así diseñar en las instituciones formadoras de recursos humanos en Odontología instancias de enseñanza-aprendizaje que permitan al profesional cubrir las necesidades y demandas en salud bucal en distintas situaciones.
The Impact of Principal Transformational Leadership on Teacher
Self-Efficacy: An Empirical Study in Private Preschool Context
Authors: Fairos Siti , Mydin Al-Amin
Published: May 2022

Leadership is very important for the process of school improvement and implementation in the
context of education (Colton, 2016). The purpose of this research was to determine the impact of
principal transformational leadership that has been practiced in four main dimensions on the
teacher‟s self-efficacy. Four dimensions of transformational leadership will be emphasized in
this research such as idealized influence, individualistic consideration, intellectual stimulation,
and inspirational motivation. The research problem of this research is how leadership practices
practiced by leaders can improve the effectiveness of teachers in teaching needs to be addressed
(Siti Noor Ismail et al., 2018). This issue has been supported by Dronnen-Schmidt (2014) about
whether some strength in leader characteristics can predict a leader‟s transformational leadership
style related to self-efficacy. Teachers with high self-efficacy should be studied to determine if
having the possibility of spirituality is an important factor in why teachers believe that they are
effective (Barsh, 2017). Therefore, this research is important to conduct because it focuses on the
preschool context.
Keywords: Transformational Leadership, Private Preschool, Self-efficacy, Principal
Quality of Life and Road Traffic Injury: A Bibliometric Analysis
Authors: Ibrahim Shamsinar , Puteh Sharifa Wan , Aizuddin Azimatun Noor , Yusoff Hanizah Mohd
Published: May 2022

Road injury is classified as an unintentional injury resulting from road crashes with one or more
vehicles or persons, and this injury may result in fatality. Among unintentional injuries, Road
Traffic Injury (RTI) is the most common cause of death worldwide (Onainor, 2019).
Approximately 1.3 million people are involved in road crashes, resulting in 20 to 50 million
suffering from non-fatal injuries worldwide (World Health Organization, 2021). Pedestrians,
cyclists, motorcyclists, and pillions are considered at-risk groups that were contributing to half of
the road traffic fatalities and injuries. About 93% of these road fatalities are from low and
middle-income countries, negatively impacting their countries' economic well-being. Apart from
that, the condition impacts the national economic growth and the household financial burden due
to the loss of productivity caused by premature death aged 5 – 29 (World Health Organization,
2021). While there are costing analyses and mathematical injury models that might project the
burden of RTIs, there is another way to understand the burden: measuring the quality of life of
those affected. QOL is one of the prominent tools used in RTI, which provides evidence-based
patient-reported outcomes regarding individuals' well-being. QOL is also used in guiding
informed decision making for future healthcare planning. The QOL measurement also is
relevant when the measurement of morbidity and mortality cannot be assessed accurately
(Rissanen, Berg, & Hasselberg, 2017). While the health provider and policymaker are affected
economically due to road crashes, the patients involved too are greatly affected by the crash
aftermath.
Keywords: Quality of life, Road Traffic Injury, Bibliometric Analysis, VOSviewer, Harzing's
Publish or Perish
Soap Production Using Locally Available Alkaline Extract from Millet Stalks: A Study on Chemical and Physical Properties of Soap
Authors: Thangiah Anthoney Swamy
Published: May 2022

An agricultural by-product namely millet stalks were examined for their potential as an alternative source of potash for soap production. The alkaline extract was used in the preparation of soap using the traditional method. These materials were ashed and the sample was subjected to hot aqueous extraction. Extract from the crushed samples was characterized by its inorganic elements calcium, sodium, potassium, and magnesium. The resulting soap was subjected to physicochemical test; saponification value, iodine value, acid value, ash content, color, texture and the results were; 74mg/KOH/g, 31.72g/100g, 5.64mg/KOH, 1%, white, hard and rough, respectively. This showed that the white color of soap was a result of bleaching of the oil sample and the hardness of the soap was due to the presence of high concentration of K+ ions in the prepared soap. Also, emulsification test was performed and the result was positive. White soluble precipitate was formed with KCl, NaCl, and NH4Cl solution while with CaCl2, MgCl2, and FeCl3 solution white gelatinous precipitate was formed which gave the insoluble complex with water. This research showed that some agricultural by-products such as millet stalks can be utilized for the traditional soap production.
Leadership and Personality Correlates of School Head Performance in the Seventh-day Adventist Church Northern Luzon Mission
Authors: Campit Marvin Nonoy B.
Published: May 2022

Nusche and Moorman (2008) postulated that school leadership is now an education policy priority around the world. Concerns such as clear cut guidelines or standardframework for performance, qualifications and preparations are consideration thatneeds to be rationalized and institutionalized. Anchored on Fiedler’s Contingencytheory, the study critically analyzed the association of leadership style andpersonality types to the performance of 41 basic education school heads of SDANLM in the Philippines in an attempt to improve educational outcomes. Descriptive correlational method was used aided with three sets of questionnaires in leadership, personality and performance. Data on leadership and personality correlated to the performance\ of school heads. Participative leadershipstyle manifested. Personality types fall under extroverted, sensing, thinking and judging (ESTJ). Autocratic leadership style correlates to school heads performance. Personality type of thinking and feeling correlates to performance. Leadership correlates to school heads performance. Autocratic style, sensing and judging for personality type serves as the predictive model for high  performance. Premised on the result, the Performance Development Framework was offered to accomplish the needed leadership growth. Differences on leadership style and personality types on selected variables can be considered for further inquiry. Spiral model of leadership emerged as a result of the study.
An Iterative Process Applied to Equilateral Triangles Resulting to the Identity 1/3+1/9+1/27+…=1/2.
Authors: Bicua Levi L. , Tayaben Precious R. , Racca Abraham P.
Published: May 2022

In this paper, we define a particular iterative process and apply it to triangles. It was shown that the process results to self-similar triangles if and only if the generator triangle is an equilateral triangle. Furthermore, the identity 1/3+1/9+1/27+...=1/2 resulted from the process.
Gender Differences towards Dental Health Knowledge, Attitude and Utilization of Dental Care
Authors: Carpizo Ruben , Buhia Mercy N.
Published: May 2022

Understanding the effect of gender on oral health would facilitate the development of successful attitude and behavior modification approach towards sustainable oral health. This study assessed the behavior, knowledge, rate, and pattern of dental service utilization of the students and workers of Adventist University of the Philippines (AUP). It also tested the widely documented hypothesis that women have better oral health behavior, oral hygiene, and periodontal status but higher dental caries rates than men. Further, it determined what dental procedure is mostly utilized by the patients.  The data were based on annual dental records of AUP Dental Department and oral interviews. From the dental record of the year 2017, a total of 2,472 patients visited the dental clinic for the following procedures: oral prophylaxis (40%), tooth extraction (13%), tooth restoration (14%), prosthodontics (7%) and orthodontics (25%). Among the dental procedures, women are always higher in number compared to men. In terms of gender, 960 or 39% of men and 1,512 or 69% of women visited the clinic revealing that women have dental visits more often than men. Oral prophylaxis and orthodontic are two of the most availed dental procedure while prosthodontics is the least. Despite AUP Clinic’s promotion for health care and health care services, dental health care utilization remains very low relating to the whole university population.  Women are more concerned with oral health than men, contrary to other researches that males have higher oral health knowledge score than females. Gender differences have no significance in terms of dental care utilization. Participants’ oral health knowledge is at least average and they showed positive attitude towards dental treatment. It is recommended that more oral or dental health campaign be done; utilization of dental service fee among students be promoted; and the importance of oral health be taught.
Breakfast Eating Habit and Academic Achievement among Student Nurses
Authors: Sepang Lovely G.
Published: May 2022

Energy is the main fuel for the cells that exist in the body in order to perform physiological functions properly. By not eating, there will be no energy to undergo daily activities. The nutritional needs of humans vary for each stage of development. Daily activities should also be balanced with adequate nutritional intake. In reality, doing so many activities can lead a person into bad or irregular eating habits. One example is the habit of skipping breakfast. The aim of this study was to determine relationship between the habits of eating breakfast with academic achievement among students. The research used descriptive correlation with cross sectional approach. This research was conducted among 129 respondents by using total sampling technique. Hypothesis test used spearman correlation. The result showed that 72 respondents (56%) have breakfast four times or more in a week. As for academic achievement, 64 (3%) of respondents have high GPA. The result showed that there is a significant relationship between breakfast habits and academic achievement, (p = 0.036). Thus, there is a significant relationship between breakfast habits and academic achievement among students of nursing university faculty.
Selected Factors Influencing Self-Perception in English Communication Skills of Nursing Students at Mission Faculty of Nursing, Asia-Pacific International University, Thailand
Authors: Klommek Jirawan , Saelee Sutthipong
Published: May 2022

Speaking English skill in Thai students is still an important national problem. This study aimed to identify factors influencing self-perception in English communication skills of nursing students. A simple random sampling technique was used to recruit 70 junior nursing students. Research instrument was developed composing of demographic data: learners (13 items), learning and teaching (8 items), social (5 items) factor; and self-perception in English communication skills with respectable validity and reliability. Data analysis was examined by using descriptive statistics and Stepwise multiple regression analysis. The results revealed the most significant predictor of self-perception in English communication skills accounting for 39.9% variance is learner factor relating to confidence in speaking English with others. This model composing of learner (2 items), learning and teaching (3 items), and social (2 items) factors, accounts for 71.4 % of the overall variance. Findings suggested that instructors and administrators develop strategies to promote students’ confidence in expressing English with teachers and others, supply adequate materials, develop interesting teaching and learning method, and provide international environment for practicing English both inside and outside the classroom.