345 research outputs found
Handling Uncertainty of Strategic Ambitions—The Use of Organizational Identity as a Risk-Reducing Device
Organizational identity can be designed to reduce the risks of uncertainty about future states of public organizations and the inherent potential issues related to evaluation and assessment. As such, organizational identity may shape a congruent and credible self-representation of the university, where a consistent narrative articulates compliance to diverse institutional frameworks, commitment to organizational distinctiveness, and a sensible rationale for strategic change. By examining the strategic plans of four European universities over a 10-year period of major organizational change, the paper discusses the subtleties of the specific combinations of the three different functions and the implications for institutional leadership
Diagnóstico de la fertilidad de suelos en dos parcelas para cultivo de cacao (Theobroma cacao) y café (Coffea arábica) en el municipio de San Buenaventura
En el norte del departamento de La Paz, la frontera agrícola fue incrementándose vertiginosamente por el ingreso del cultivo de caña de azúcar, actividades ganaderas, asentamientos en áreas para la extracción ilegal de la madera, entre otras, que van en desmedro de la biodiversidad; el trabajo consistió en diagnosticar la fertilidad de suelos para la implementación de cultivos con cacao y café, en dos comunidades (San Silvestre y Esmeralda), tomando como base los datos obtenidos por Miranda et al. (2021) sobre análisis físico-químico de suelos. El procedimiento fue: a) sistematización de información secundaria y primaria, b) análisis de ingresos y salidas de nutrientes del suelo y c) dosificación de nutrientes en base al balance de los mismos para el cultivo de cacao y café. De acuerdo al análisis realizado, En la comunidad Esmeralda para tener adecuados rendimientos en cacao se debe adicionar 738.5 kg N ha-1 y 76.07 kg P2O5 ha-1 y en café 212.5 kg N ha-1, los mismos por su bajo porcentaje de saturación de acidez no requieren encalado. En la comunidad San Silvestre, se requiere adición de 788.09 kg N ha-1, 229.03 kg P2O5 ha-1 y 403.86 kg K2O para el cultivo de cacao y para el cultivo de café 262.09 kg N ha-1 21.20 kg P2O5. Por otro lado, los suelos presentan un alto porcentaje de saturación de acidez recomendado con 46.73 %, mayor al porcentaje de saturación de cultivo de cacao (20 %) y café (25 %) sugiriendo la adición de 4.327 kg de cal agrícola para el cultivo de cacao por planta y 0.439 kg para el cultivo de café, sugiriendo los mismos ser aplicados en dos etapas
Benchmarking and improving point cloud data management in MonetDB
The popularity, availability and sizes of point cloud data sets are increasing, thus raising interesting data
management and processing challenges. Various software solutions are available for the management of
point cloud data. A benchmark for point cloud data management systems was defined and it was executed
for several solutions. In this paper we focus on the solutions based on the column-store MonetDB, the
generic out-of-the-box approach is compared with two alternative approaches that exploit the spatial
coherence of the data to improve the data access and to minimize the storage requirement
Big Data analytics in the Geo-Spatial Domain
Big data collections in many scientific domains have inherently rich spatial and geo-spatial features. Spatial location is among the core aspects of data in Earth observation sciences, astronomy, and seismology to name a few. The goal of our project is to design an efficient data management layer for a generic geo-spatial analysis system with focus on three dimensional (3D) city models. Digital 3D city models play a crucial role in research of urban phenomena; they form the basis for flow simulations (e.g. wind streams, water runoff and heat island effects), urban planning, and analysis of underground formations. Urban scenes consist of large collections of semantically rich objects which have a large number of properties such as material and color. Modeling and storing these properties indicating the relationships between them is best handled in a relational database. The provision of spatial and geo-spatial features in database systems needs to be extended and brought to maturity to fulfill the requirements of real-world scientific applications. A class of DBMSs, called column-stores, have proven efficiency for analytic applications on extremely large data sets. Column stores have become the de-facto standard for managing large data warehouses. Although column stores have a proven track record in business analytics, their pros- and cons- for GIS applications are not yet well understood. Our goal is to have a spatial DBMS which iteratively loads data from different sources and converts it into a common format to enable 3D operations and analyses, such as 3D intersections, and semantic properties management
Mining Methylation for Early Detection of Common Cancers
A single method that detects multiple common cancer types at an early stage would have the biggest payoff for cancer control, say Brena and colleagues
A spatial column-store to triangulate the Netherlands on the fly
3D digital city models, important for urban planning, are currently constructed from massive point clouds obtained through airborne LiDAR (Light Detection and Ranging). They are semantically enriched with information obtained from auxiliary GIS data like Cadastral data which contains information about the boundaries of properties, road networks, rivers, lakes etc. Technical advances in the LiDAR data acquisition systems made possible the rapid acquisition of high resolution topographical information for an entire country. Such data sets are now reaching the trillion points barrier. To cope with this data deluge and provide up-to-date 3D digital city models on demand current geospatial management strategies should be re-thought. This work presents a column-oriented Spatial Database Management System which provides in-situ data access, effective data skipping, efficient spatial operations, and interactive data visualization. Its efficiency and scalability is demonstrated using a dense LiDAR scan of The Netherlands consisting of 640 billion points and the latest Cadastral information, and compared with PostGIS
Effect of a concurrent training on risk factors for the accumulation of hepatic fat of obese adolescents
Modelo de estudo: Estudo prospectivo. Objetivo: Avaliar o efeito de um protocolo de treinamento concorrente com duração de 16 semanas sobre fatores de risco para o acúmulo de gordura hepática de jovens obesos. Metodologia: A amostra foi formada por 38 indivíduos obesos de ambos os sexos e com idade entre 12 e 15 anos. A obesidade foi atestada pelo percentual de gordura corporal, o qual foi estimado pela absortometria radiológica de dupla energia (DEXA). Adicionalmente, a quantidade de gordura localizada no tronco (kg) foi estimada também. Antes e após a intervenção, os jovens foram submetidos a exames bioquímicos de sangue(perfil lipídico completo em jejum [mg/dL]) e a ultrassonografia do fígado (tamanho dos lobos direito [LD em cm] e esquerdo [LE em cm]). A Intervenção consistiu de treinamento concorrente (treino resistido [30 minutos] e aeróbio [30 minutos]) com três sessões semanais, totalizando 180 minutos por semana. A análise estatística foi composta pelo teste t de Student para dados pareados, utilizando o software SPSS (17.0), e significância estatística fixada em p<5%. Resultados: Após a intervenção, foram observadas melhoras significantes no percentual de gordura total (PRÉ: 45,1±5,3 e PÓS: 41,7±5,6; p= 0,001) ena região do tronco (PRÉ: 46,5±5,6 e PÓS: 42,9±6,3; p= 0,001). Para o perfil lipídico, houve redução no colesterol total (PRÉ: 164±34 e PÓS: 148±29; p= 0,001), triglicérides (PRÉ: 118±59 e PÓS: 104±53; p=0,002) e lipoproteínas de baixa densidade (PRÉ: 100±29 e PÓS: 85±26; p= 0,001), porém, não para as de alta densidade (p= 0,981). Tanto o LE (PRÉ: 8,8±1,4 e PÓS: 7,8±1,3; p= 0,001) como o LD (PRÉ:13,6±1,3 e PÓS: 12,9±1,1; p= 0,001) sofreram diminuição em suas proporções. Conclusão: Em jovens obesos, o treinamento concorrente foi eficiente no combate a alguns fatores de risco ao acúmulo de gordura no fígado, bem como, na redução da gordura em ambos os lobos do órgão.Study Design: Prospective study. Objective: To evaluate the effect of a protocol of concurrent training lasting 16 weeks on risk factors for the accumulation of hepatic fat in obese youth. Methods: 38 obese children and adolescents of both sexes, between 12 and 15 years old. The obesity was attested by the percentage of body fat, which was estimated by dual-energy X-ray absorptiometry (DEXA). Additionally, the amount of fat located in the trunk (kg) was estimated too. Before and after the intervention, the youths underwent biochemical blood tests (fasting complete lipid profile [mg / dL]) and ultrasonography of the liver (right size Wolves [LD cm] and left [LE in cm]). The intervention consisted of concurrent training (strength training [30 minutes] and endurance training [30 minutes]) with three sessions per week, totaling 180 minutes a week, for ten weeks. Statistical analysis was made by the test t of Student for paired data using SPSS software (17.0) and significance statistical fixed at p <5%. Results: After the intervention, significant improvements were observed in the percentage of total fat (PRE: 45.1 ± 5.3 and POST: 41.7 ± 5.6, p = 0.001) and in the trunk region (PRE: 46, 5 ± 5.6 and POST: 42.9 ± 6.3, p = 0.001). For lipid profile, reduction in total cholesterol (PRE: 164 ± 34 and POST: 148 ± 29, p = 0.001), triglycerides (PRE: 118 ± 59 and POST: 104 ± 53, p = 0.002) and lipoproteins density (PRE: 100 ± 29 and POST: 85 ± 26, p = 0.001), but not for high-density (p= 0.981). Both the LE (PRE: 8.8 ± 1.4 and POST: 7.8 ± 1.3, p = 0.001) and LD (PRE: 13.6 ± 1.3 and POST:12.9 ± 1, 1, p = 0.001) experienced a decrease in its proportions. Conclusion: The concurrent trainingwas effective in combating some risk factors to the accumulation of fat in the liver, as well as in reducing fat in both lobes of the organ in young obese
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