Exploratory methods for the study of incomplete and intersecting shape boundaries from landmark data

Structured spatial point patterns appear in many applications within the natural sciences. Often the points record the location of key features, called landmarks, on continuous object boundaries, such as anatomical features on a human face or on an animal skull. In other situations, the points may simply be arbitrarily spaced marks along a smooth curve, such as on handwritten numbers or letters. Sometimes the points may record the location of clearly visible features from a general structure which has disappeared, such as building foundations at an archaeological site. This paper proposes novel exploratory methods for the identification of structure within point datasets. In particular, points are linked together to form curves which estimate the original shape from which the points are the only recorded information. Nonparametric regression methods are applied to polar coordinate variables obtained from the point locations and periodic modelling allows closed curves to be fitted to circular and elliptical shapes even when data are available on only part of the boundary. Further, the model allows discontinuities to be identified to describe rapid changes in the curves. These generalizations are particularly important when the points represent shapes which are occluded or are intersecting. A range of real-data examples is used to motivate the modelling and to illustrate the flexibility of the approach. The method successfully identifies underlying structure and its output could also be used as the basis for further analysis

Effect of intercropping varieties of sweet potato and okra in an ultisol of southeastern Nigeria

A field experiment was conducted at the research farm of the National Root Crops Research Institute (NRCRI), Umudike in 2000 and 2001 cropping seasons to access the productivity of three sweet potato cultivars intercropped with three okra cultivars. Intercropping generally increased okra plant height while intercropping with TIS 2532 OP.1.13 sweet potato significantly increased the number of pods per plant of okra than intercropping with other sweet potato cultivars. Tuber yield in sweet potato was higher in TIS 87/0087 than other cultivars. Both pod and tuber yields were not affected by intercropping. Land equivalent ratio was higher with intercropping TAE 38 okra and TIS 87/0087 sweet potato

Horizon Detection in Seismic Data: An Application of Linked Feature Detection from Multiple Time Series

Seismic studies are a key stage in the search for large scale underground features such as water reserves, gas pockets, or oil fields. Sound waves, generated on the earth’s surface, travel through the ground before being partially reflected at interfaces between regions with high contrast in acoustic properties such as between liquid and solid. After returning to the surface, the reflected signals are recorded by acoustic sensors. Importantly, reflections from different depths return at different times, and hence the data contain depth information as well as position. A strong reflecting interface, called a horizon, indicates a stratigraphic boundary between two different regions, and it is the location of these horizons which is of key importance. This paper proposes a simple approach for the automatic identification of horizons, which avoids computationally complex and time consuming 3D reconstruction. The new approach combines nonparametric smoothing and classification techniques which are applied directly to the seismic data, with novel graphical representations of the intermediate steps introduced. For each sensor position, potential horizon locations are identified along the corresponding time-series traces. These candidate locations are then examined across all traces and when consistent patterns occur the points are linked together to form coherent horizons

INSTRUÇÕES AOS AUTORES

A Revista “Anais da Faculdade de Medicina de Olinda (FMO)” é um veículo acadêmico de publicação semestral da FMO, que pretende divulgar artigos originais, artigos de revisão, casos clínicos de interesse da comunidade em saúde que possam contribuir para o ensino e desenvolvimento do melhor atendimento ao paciente, além de ser um instrumento de integração nacional dos profissionais de saúde

Instruções para os autores

A Revista “Anais da Faculdade de Medicina de Olinda (FMO)” é um veículo acadêmico de publicação semestral da FMO, que pretende divulgar artigos originais, artigos de revisão, casos clínicos de interesse da comunidade em saúde que possam contribuir para o ensino e desenvolvimento do melhor atendimento ao paciente, além de ser um instrumento de integração nacional dos profissionais de saúde

Instruções para os Autores

A Revista “Anais da Faculdade de Medicina de Olinda (FMO)” é um veículo acadêmico de publicação semestral da FMO, que pretende divulgar artigos originais, artigos de revisão, casos clínicos de interesse da comunidade em saúde que possam contribuir para o ensino e desenvolvimento do melhor atendimento ao paciente, além de ser um instrumento de integração nacional dos profissionais de saúde

Anais da Faculdade de Medicina de Olinda

Membros da Diretoria da FMO Inácio de Barros Melo Neto, Conselho Editorial, Corpo Editorial Interno, Conselho de Revisores e Corpo Editorial Externo

Anais da Faculdade de Medicina de Olinda

Membros da Diretoria da FMO Inácio de Barros Melo Neto, Conselho Editorial, Corpo Editorial Interno, Conselho de Revisores e Corpo Editorial Externo

Anais da Faculdade de Medicina de Olinda

Membros da Diretoria da FMO Inácio de Barros Melo Neto, Conselho Editorial, Corpo Editorial Interno, Conselho de Revisores e Corpo Editorial Externo

Farkas-Type Results for Vector-Valued Functions with Applications

The main purpose of this paper consists of providing characterizations of the inclusion of the solution set of a given conic system posed in a real locally convex topological space into a variety of subsets of the same space defined by means of vector-valued functions. These Farkas-type results are used to derive characterizations of the weak solutions of vector optimization problems (including multiobjective and scalar ones), vector variational inequalities, and vector equilibrium problems.This research was partially supported by MINECO of Spain and FEDER of EU, Grant MTM2014-59179-C2-1-P, by the project DP160100854 from the Australian Research Council, and by the project B2015-28-04: “A new approach to some classes of optimization problems” from the Vietnam National University - HCM city, Vietnam