Taxonomic problems

Ebook "Encyclopedia of South American aquatic insects: Odonata - Zygoptera - Illustrated keys to known families, genera, and species in South America" was begun to provide keys to the aquatic insect species known from Brazil. The original goal was to include all genera known from South America and all species from Brazil, but for most groups, the scope was expanded to encompass all species in South America, and, in some cases, to include terrestrial species of orders that include both terrestrial and aquatic taxa.

698p tachieuhoa 28-01-2024 2 2   Download

In recent years several different fields, such as ecology, medicine and microbiology, have experienced an unprecedented development due to the possibility of direct sequencing of microbioimic samples. Among problems that researchers in the field have to deal with, taxonomic classification of metagenomic reads is one of the most challenging. State of the art methods classify single reads with almost 100% precision. However, very often, the performance in terms of recall falls at about 50%.

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Although software tools abound for the comparison, analysis, identification, and classification of genomic sequences, taxonomic classification remains challenging due to the magnitude of the datasets and the intrinsic problems associated with classification.

21p visilicon2711 20-08-2021 4 1   Download

The genus Hosta is a group of economically appreciated perennial herbs consisting of approximately 25 species that is endemic to eastern Asia. Due to considerable morphological variability, the genus has been well recognized as a group with taxonomic problems. Chloroplast is a cytoplasmic organelle with its own genome, which is the most commonly used for phylogenetic and genetic diversity analyses for land plants.

13p viansan2711 30-07-2021 20 1   Download

Metagenomic sequencing studies are becoming increasingly popular with prominent examples including the sequencing of human microbiomes and diverse environments. A fundamental computational problem in this context is read classification; i.e. the assignment of each read to a taxonomic label.

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This article is devoted to the problems of forming analytical support for the management of economic activities of industrial enterprises under emergency situations. It is established that the current approaches of the formation of economic analysis in economic activities do not allow to fully assess the impact of emergencies on the financial conditions of the enterprises.

12p tozontozon 25-04-2020 15 2   Download

Specimens of taxa assigned to Pseudosabinia Morris & Skelton, collected from the Campanian–Maastrichtian sequences of different regions of Turkey such as the Kocaeli Peninsula, Amasya, Bayburt (Pontides), Sivas, Malatya, Elazığ (eastern Anatolian platform) and Kahta-Adıyaman and Yaylaçiftliği-Antakya (northernmost part of the Arabian platform), are determined and the taxonomic statuses of the species are discussed.

27p vidonut2711 09-11-2019 12 2   Download

Matthiola W.T.Aiton is a taxonomically complex genus in which there are many problems, mostly with Matthiola longipetala and M. odoratissima. Matthiola species native to Turkey were collected from various locations in Anatolia, and their DNA was isolated.

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In this study, the pollen morphology of all Scaligeria DC. species distributed in Turkey were studied with light and scanning electron microscopy for the first time. The aim is to contribute to knowledge of the variation among seven Scaligeria species, which have taxonomic problems, based on pollen morphological characteristics by population analysis.

16p caplock2711 21-02-2019 16 1   Download

This study proposes a parallel algorithm for the taxonomic assignment problem, called SeMetaPL, which aims to deal with the computational challenge. The proposed algorithm is evaluated with both simulated and real datasets on a high performance computing system. Experimental results demonstrate that the algorithm is able to achieve good performance and utilize resources of the system efficiently

12p thuyliebe 05-10-2018 19 0   Download

The workshop was concluded with a “wrap-up” session involving all participants and presenters. Topics of discussion included the problems associated with trying to calculate the cost-benefit analysis of using regular and novel ingredients in aqua or poultry feeds because of the huge variation in the quantity and quality of regional and provincial supplies. An agreement was reached that some assumptions will need to be made but heavily qualified! Some participants saw that the use of local / regional or vernacular names for certain feed ingredients could become confusing.

0p loginnhanh 22-04-2013 41 1   Download

We will refer to embeddings providing a guarantee akin to that of Lemma 1.1 as JL- embeddings. In the last few years, such embeddings have been used in solving a variety of problems. The idea is as follows. By providing a low-dimensional representation of the data, JL-embeddings speed up certain algorithms dramatically, in particular algorithms whose run-time depends exponentially in the dimension of the working space. (For a number of practical problems the best-known algorithms indeed have such behavior.

9p yasuyidol 02-04-2013 47 4   Download

One problem with this teaching demonstration, however, was the fact that the 16mm print of Caligari had no musical soundtrack, something that the stu- dents had become accustomed to having with their silent films during the semes- ter. This factor would ultimately lead to subsequent demonstrations testing the notion of whether modern electronic music could be used to enhance student engagement with silent films in the classroom.

0p khanhchilam 01-04-2013 46 5   Download

The problem of service composition is viewed by many as the \holy grail" in Services Computing. There have been many attempts by researchers from various domains to perform research on this highly relevant and timely sub- ject. One of the goals in Semantic Web research has been to provide con- cepts, methods, and tools to cater for automatic composition of services on the Web.

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Among the elements of the conferences that have to do with the elderly, the following are noted: education about the main health problems and the methods to prevent them; promotion of food supplies and adequate nutrition; supply of appropriate drinking water and basic sanitation; immunization against major infectious diseases; prevention and control of endemic diseases; appropriate treatment of common diseases and accident consequences and availability of essential medication, in addition to social resources, such as social groups, universities open to the seniors and awareness about the ph...

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We know how to fix the problem of childhood hunger, and we have an opportunity now to build a prosperous future for us all by doing that. Over the past century Americans have built marvelous networks and systems of infrastructure that are necessary to our economy and quality of life. Through creativity, inventiveness, ingenuity and hard work we have made our country a model of success in many areas. For example, we have built a national power grid, telecommunication systems, water systems, transportation systems, and internet systems that are peerless, to list just a few.

36p can_thai 12-12-2012 54 3   Download