scholarly journals XII.—On the Mode of Growth and Increase amongst the Corals of the Palæozoic Period

1875 ◽  
Vol 27 (3) ◽  
pp. 237-250 ◽  
Author(s):  
H. Alleyne Nicholson
Keyword(s):  
Sexual Reproduction ◽  
Present Communication ◽  
Different Parts

The mode of growth and increase amongst the Coralligenous Actinozoa in general has been more or less fully treated of by various observers, including such distinguished naturalists as Milne-Edwards, and Haime, Dana, Martin Duncan, Fromentel, Agassiz, and others. I do not, therefore, in the present communication propose to pass the whole of this subject in review, but rather to consider the general and special peculiarities of growth and non-sexual reproduction exhibited by the corals of the Palæozoic Period alone. Many of these peculiarities are of great interest, both from the stand-point of the palæontologist, and also as concerns the systematic zoologist, and they have not yet met with all the attention they deserve. To carry out this inquiry, it will be necessary first to consider the general phenomena exhibited by the Palæozoic corals, as regards their mode of growth and increase. We may then examine the bearing of these phenomena upon various points connected with the classification of these ancient corals, and more especially upon their generic and specific affinities and differences. Finally, we may briefly consider the relations which exist between different parts of a compound corallum as regards their growth, and their influence upon the ultimate form of the colony.

Classification of Rusty and Non-Rusty Images

2020 ◽  
Vol 9 (4) ◽  
pp. 1-17
Author(s):  
Mridu Sahu ◽  
Tushar Jani ◽  
Maski Saijahnavi ◽  
Amrit Kumar ◽  
Upendra Chaurasiya ◽  
...  
Keyword(s):  
Support Vector Machine ◽  
Classification Accuracy ◽  
Data Augmentation ◽  
Support Vector ◽  
Suitable Model ◽  
Online Databases ◽  
Perlin Noise ◽  
Combined Features ◽  
Different Parts

Rust detection is necessary for proper working and maintenance of machines for security purposes. Images are one of the suggested platforms for rust detection in which rust can be detected even though the human can't reach to the area. However, there are a lack of online databases available that can provide a sizable dataset to identify the most suitable model that can be used further. This paper provides a data augmentation technique by using Perlin noise, and further, the generated images are tested on standard features (i.e., statistical values, entropy, along with SIFT and SURF methods). The two most generalized classifiers, naïve Bayes and support vector machine, are identified and tested to obtain the performance of classification of rusty and non-rusty images. The support vector machine provides better classification accuracy, which also suggests that that the combined features of statistics, SIFT, and SURF are able to differentiate the images. Hence, it can be further used to detect the rust in different parts of machines.

Absence of Wolbachia in the workers of Asian honeybee, Apis cerana indica

2012 ◽  
Vol 5 (1) ◽  
pp. 19-24
Author(s):  
Mahesh Pattabhiramaiah ◽  
Dorothea Brueckner ◽  
MS Reddy
Keyword(s):  
Apis Cerana ◽  
Life Sciences ◽  
Present Communication ◽  
Chain Reaction ◽  
Reproductive Incompatibility ◽  
Apis Cerana Indica ◽  
Wolbachia Endosymbiont ◽  
Polymerase Chain ◽  
Asian Honeybee ◽  
Different Parts

Wolbachia is a group of cytoplasmically inherited bacteria that can cause reproductive alterations in arthropods including parthenogenesis, reproductive incompatibility and feminization of genetic males. Wolbachia are found in a well studied group of insects, but there is a lack of data on their distribution. Workers of the honeybee sub species Apis cerana indica, collected from different parts of Karnataka, India were screened by PCR for Wolbachia, because this endosymbiont has been implicated in causing thelytoky in other Hymenoptera. In the present communication, we report the absence of Wolbachia endosymbiont in the workers of honeybee collected from different geographic locations of Karnataka using Wolbachia specific 16S rDNA polymerase chain reaction enzymes.DOI: http://dx.doi.org/10.3126/ijls.v5i1.5230 International Journal of Life Sciences Vol.5(1) 2011 19-24

X. On the anatomy of the mole-cricket

1825 ◽  
Vol 115 ◽  
pp. 203-246 ◽  
Keyword(s):  
Single Species ◽  
Anatomical Structure ◽  
Present Communication ◽  
Entire Volume ◽  
Mole Cricket ◽  
The World ◽  
Adequate Accuracy ◽  
Principal Points ◽  
The Subject

The following observations contain the principal points of a laborious examination of the anatomical structure of the gryllotalpa, or mole-cricket; and if I dare hope that that examination has been conducted with any thing like adequate accuracy, I need not apologize for the length of the details with which the account of it is accompanied, since Cuvier has affirmed of an entire volume written by Lyonnet on the anatomy of a single species of caterpillar, that it contains not one word that is useless. Natural science indeed has now arrived at that point, in which individual detail is requisite for the acquisition not only of a surer basis of classification of species, but also of more correct principles of general physiology. Independently however of these considerations, the insect, which is the subject of the present communication, is so singular in its structure and habits, and is in some parts of the world so formidable to the agriculturist, as to render its history pecu­liarly interesting.

Failure Behaviour of Semantan Bamboo Strips Loaded in Bending and Shear

2011 ◽  
Vol 462-463 ◽  
pp. 1176-1181
Author(s):  
Shahril Anuar Bahari ◽  
Mansur Ahmad
Keyword(s):  
Mechanical Properties ◽  
Microscopic Observation ◽  
Maximum Stress ◽  
Failure Modes ◽  
Vascular Bundles ◽  
Failure Behaviour ◽  
Modes Of Failure ◽  
Different Parts

In this study, the classification of modes of failure, the observation of microscopic failures and the mechanical properties of Semantan bamboo strips were investigated. Specimens were loaded in bending and shear parallel to grain. Specimens were taken from internodes and node parts in bottom, middle and top portions of bamboo culms. From the classification, different modes of failure occurred in different parts of Semantan bamboo culms loaded in bending and shear. From the microscopic observation, the failures occurred in both parenchyma and vascular bundles regions for all classified failure modes from all tests, except for Even Splitting Mode from shear. This mode exhibited failure in parenchyma only, without any failure in vascular bundles regions. The Maximum Stress (σml) values between failure modes for both tests were significantly different. Generally, anatomical behaviour at different culm’s parts had influenced the different modes of failure and microscopic failures of Semantan bamboo strips loaded in bending and shear.

scholarly journals The manifestation of active resistance to the growth of implanted cancer

1912 ◽  
Vol 85 (578) ◽  
pp. 201-213 ◽  
Keyword(s):  
Present Communication ◽  
Active Resistance ◽  
Current Classification ◽  
Transplantable Tumour ◽  
Morphological Differences

The current classification of neoplasms has been almost entirely founded upon their structural characters, qualified wherever possible by the knowledge available upon their histogenesis. The researches which have been made, more especially with transplanted tumours of the rodents, have superadded to the recognised morphological differences and resemblances which turnouts exhibit, much information upon the more physiological side of their activities,, and have shown how variable tumour strains may be in their manner of growth. In the present communication, the individuality of various transpantable tumour strains w ill be brought out by subjecting them to an analysis with a new factor. This factor will be the quality of the reaction a strain induces when implanted into a fresh series of animals, and this reaction will be tested by showing how the animals behave to subsequent inoculation of a transplantable tumour.

scholarly journals An experimental inquiry undertaken with the view of ascertaining whether any signs of current electricity are manifested in plants during vegetation

1854 ◽  
Vol 6 ◽  
pp. 267-267
Keyword(s):  
Experimental Results ◽  
Present Communication ◽  
Electric Currents ◽  
Normal Result ◽  
Different Parts

In the present communication the author has related the experimental results that he has arrived at, and which tend to show that electric currents exist in the leaves and in the roots or spongioles ot plants. Becquerel and Wartmann have already proved that electric currents may be obtained in different parts of vegetables, but the object of the paper is to point out the connection of the currents in the above-named organs with the vital or organic changes which take place in them. In consequence of the secondary actions which occur at the electrodes some difficulty is experienced in ascertaining the true or normal result in the roots. Combining however the facts obtained by means of the galvanometer with analogical evidence, the author considers that they tend to establish the conclusion, that, during the changes which occur in the leaves and in the roots of plants, current electricity is manifested.

Recent Work on the Phacopidae

1927 ◽  
Vol 64 (7) ◽  
pp. 308-322 ◽  
Author(s):  
F. R. Cowper Reed
Keyword(s):  
Recent Work ◽  
Present Author ◽  
New Genera ◽  
The World ◽  
Different Parts ◽  
Made In

Since the publication of the paper by the present author in 1905 on the Classification of the Phacopidae, a considerable advance has been made in our knowledge of this family as a result of further and better material being obtained, and of new discoveries in different parts of the world. Many new genera and subgenera have been instituted, and modifications or limitations of some of the old terms have been introduced by various authors. The work of Wedekind, Clarke, Rud. and E. Richter, and Kozlowski has specially dealt with questions of classification, but there is still a considerable amount of diversity in the usage and application of the generic and subgeneric names.

scholarly journals X-ray and CT presentation of advanced gastric carcinomas of different locations

2009 ◽  
Vol 56 (4) ◽  
pp. 99-105
Author(s):  
A. Djuric-Stefanovic ◽  
Dj. Saranovic ◽  
D. Masulovic ◽  
Lj. Lazic ◽  
T. Nastasic ◽  
...  
Keyword(s):  
Esophagogastric Junction ◽  
Anterior Abdominal Wall ◽  
Proximal Part ◽  
Distal Segment ◽  
The Body ◽  
X Ray ◽  
Japanese Classification ◽  
Scanning Region ◽  
Different Parts

We presented the X-ray and CT findings characteristic for gastric cancers of different localizations (localized in different parts of the stomach). Particularly, esophagogastric junction (EGJ) carcinomas and antral carcinomas are singled out, as two localizations of gastric cancer that we usually meet in everyday clinical and radiological practice, and which have completely different radiological presentation. Advanced carcinomas of esophago-gastric junction, whose incidence is on the rise, usually affect the distal segment of the esophagus, cardia, and proximal part of the stomach, in different proportions. Siewert's, and the Japanese classification of these tumors are listed. Due to the involvement of the distal esophagus, scanning region, besides the abdomen, should be expanded to the chest. Advanced cancer of the antral part of the stomach is presented by the X-ray as a fungating, infiltrative, or combined form, often capturing the entire wall circumference. Possible infiltration of the left liver, the body and neck of the pancreas, colon and anterior abdominal wall should be estimated by CT.

scholarly journals Proposal of a new system to classify possible damages in piles partially reinforced considering the results of low strain integrity tests

2019 ◽  
Vol 12 (6) ◽  
pp. 1408-1427
Author(s):  
R. P. S. PASQUAL ◽  
A. C. M. KORMANN ◽  
T. F. DE SOUZA JUNIOR
Keyword(s):  
External Factors ◽  
New Classification ◽  
Fem Simulations ◽  
Several Variables ◽  
The Difference ◽  
Integrity Tests ◽  
Different Parts ◽  
New System ◽  
Made In

Abstract Low strain integrity tests in piles are relatively cheap, of quick execution and nondestructive. Despite all these advantages, several variables are involved and the influence of external factors can complicate the interpretation of the results. Between them, the influence of the pile reinforcement can be high lighted. In piles partially reinforced, the difference in density and elastic modulus of the concrete in different parts of the pile and the influence of the process of introducing the reinforcement bars can induce some reflections in the test that can be confused with damage in the pile and, therefore, should be taken into account to analyze the tests results. In this research, the influence of the reinforcement embedded in the piles is analyzed using numerical (FEM) simulations and comparing them with tests made in the field. A new classification of possible damages is proposed based on the analysis of the reflections observed at the end of the reinforcement cage embedded in a pile partially reinforced.

On the Linear and Vector Function

1897 ◽  
Vol 21 ◽  
pp. 310-312
Author(s):  
Tait
Keyword(s):  
Vector Function ◽  
Early Stage ◽  
Present Communication ◽  
Real Roots ◽  
Image Position ◽  
The Right ◽  
Homogeneous Strain ◽  
Unit Vectors

In a paper read to the Society in May last, I treated specially the case in which the Hamiltonian cubic has all its roots real. In that paper I employed little beyond the well-known methods of Hamilton, but some of the results obtained seemed to indicate a novel and useful classification of the various forms of the Linear and Vector Function. This is the main object of the present communication.It is known that we may always writeand that three terms of the sum on the right are sufficient, and in general more than is required, to express any linear and vector function. In fact, all necessary generality is secured by fixing, once for all, the values of α, β, γ, or of α1, β1, γ1, leaving the others arbitrary:—subject only to the condition that neither set is coplanar. Thus as a particular case we may write eitherIn either case we secure the nine independent scalar coefficients which are required for the expression of the most general homogeneous strain. But forms like these are relics of the early stage of quaternion development, and (as Hamilton expressly urged) they ought to be dispensed with as soon as possible.2. A linear and vector function is completely determined if we know its effects on each of any system of three non-coplanar unit-vectors, say α, β, γ. If its cubic have three real roots, these vectors may, if we choose be taken as the directions which it leaves unaltered; if but one, we may take a corresponding system in the formα, βcosa ± ιγsinα,where ι is But it is preferable to keep the simpler form α, β, γ, with the understanding that β and γ may be bi-vectors, of the form just written.

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