scholarly journals Rock mass blastability dependence on rock mass quality.

2013 ◽  
Vol 47 (4) ◽  
pp. 1694 ◽  
Author(s):  
M. Chatziangelou ◽  
B. Christaras
Keyword(s):  
Rock Mass ◽  
Classification System ◽  
Quality Characteristics ◽  
Classification Systems ◽  
New Classification ◽  
The Poor ◽  
Rock Mass Quality ◽  
To Come ◽  
Blastability Index

The present paper tries to investigate the influence of rock mass quality characteristics on blasting results. In order to come to some conclusions, blastability and quality of rock mass were put together using the already known classification systems. Taking into account the quantity of blastability index (BI) for every possible structural appearance of the poor rock mass, the relation of discontinuities characteristics and blastability index are investigated. The estimations of the above trial gave arise on a new classification system being called “Blastability Quality System (BQS)”, which can be an easily and wide use tool as it is a quickly calculator for blastability index (BI) and rock mass quality.

scholarly journals Toward the Development of a Comprehensive Clinically Oriented Patient Profile: A Systematic Review of the Purpose, Characteristic, and Methodological Quality of Classification Systems of Adult Spinal Deformity

Neurosurgery ◽  
2021 ◽  
Author(s):  
Kenny Yat Hong Kwan ◽  
J Naresh-Babu ◽  
Wilco Jacobs ◽  
Marinus de Kleuver ◽  
David W Polly ◽  
...  
Keyword(s):  
Systematic Review ◽  
Decision Making ◽  
Classification System ◽  
Methodological Quality ◽  
Literature Search ◽  
Adult Spinal Deformity ◽  
Classification Systems ◽  
Systematic Literature Search ◽  
Patient Profile

Abstract BACKGROUND Existing adult spinal deformity (ASD) classification systems are based on radiological parameters but management of ASD patients requires a holistic approach. A comprehensive clinically oriented patient profile and classification of ASD that can guide decision-making and correlate with patient outcomes is lacking. OBJECTIVE To perform a systematic review to determine the purpose, characteristic, and methodological quality of classification systems currently used in ASD. METHODS A systematic literature search was conducted in MEDLINE, EMBASE, CINAHL, and Web of Science for literature published between January 2000 and October 2018. From the included studies, list of classification systems, their methodological measurement properties, and correlation with treatment outcomes were analyzed. RESULTS Out of 4470 screened references, 163 were included, and 54 different classification systems for ASD were identified. The most commonly used was the Scoliosis Research Society-Schwab classification system. A total of 35 classifications were based on radiological parameters, and no correlation was found between any classification system levels with patient-related outcomes. Limited evidence of limited quality was available on methodological quality of the classification systems. For studies that reported the data, intraobserver and interobserver reliability were good (kappa = 0.8). CONCLUSION This systematic literature search revealed that current classification systems in clinical use neither include a comprehensive set of dimensions relevant to decision-making nor did they correlate with outcomes. A classification system comprising a core set of patient-related, radiological, and etiological characteristics relevant to the management of ASD is needed.

scholarly journals Classification systems for gingival recession and suggestion of a new classification system

2018 ◽  
Vol 29 (2) ◽  
pp. 233 ◽  
Author(s):  
Nagappa Guttiganur ◽  
Shivanand Aspalli ◽  
MuktaV Sanikop ◽  
Anupama Desai ◽  
Reetika Gaddale ◽  
...  
Keyword(s):  
Classification System ◽  
Gingival Recession ◽  
Classification Systems ◽  
New Classification

scholarly journals Analysis of engineering geology conditions based on the quality of rock mass in the Tiga Dihaji Dam’s diversion tunnel, South Sumatera, Indonesia

2021 ◽  
Vol 325 ◽  
pp. 05001
Author(s):  
Zekrinaldi ◽  
Ferian Anggara ◽  
Hendy Setiawan
Keyword(s):  
Rock Mass ◽  
Geological Strength Index ◽  
Strength Index ◽  
Diversion Tunnel ◽  
Rock Mass Quality ◽  
Geological Conditions ◽  
Q System

This research has examined the rock mass quality case study in the Tiga Dihaji Dam’s diversion tunnel. Observations of geological conditions were carried out on the surface and subsurface of the study site and show that the study area consists of tuffaceous sandstone and carbonate interbeds. The method of this study is based on the classification of the Geological Strength Index (GSI), Rock Mass Rating (RMR), and the Q-system. The results indicate that tuffaceous sandstone has a GSI value of 15 - 87.5 (very poor - very good), RMR 48 - 82 (fair - very good), and Q-system 0.01 – 60.0 (exceptionally poor - very good). Meanwhile, carbonate interbeds have a low value, with a GSI value of 10.5 - 77.5 (very poor to very good), RMR 17.0 – 56.0 (very - poor fair), and Q-system 0 - 35.2 (exceptionally poor - good). Moreover, a correlation was made between rock mass quality for conditions in the study area. The correlation between GSI and RMR was obtained by the equation GSI = 2.2885RMR 82.567 (R2 = 0.6653), RMR and Q-system RMR = 2.0175ln(Q) + 63.061 (R2 = 0.4987), and GSI and Q-system GSI = 7.2119ln(Q) 54.578 (R2 = 0.8095).

scholarly journals Posttraumatic Lateral Dislocation of Mandibular Condyle: A Proposed New Classification with Report of 14 Dislocated Condyles

2019 ◽  
Vol 12 (4) ◽  
pp. 249-253 ◽  
Author(s):  
Tabishur Rahman ◽  
Ghulam Sarwar Hashmi ◽  
Syed Saeed Ahmed ◽  
Sajjad Abdur Rahman
Keyword(s):  
Clinical Experience ◽  
Classification System ◽  
Clinical Condition ◽  
Mandibular Condyle ◽  
Classification Systems ◽  
Radiological Findings ◽  
New Classification ◽  
Lateral Dislocation

Lateral dislocation of the intact mandibular condyle is a relatively uncommon clinical condition. Since the first description and classification of these dislocations given by Allen and Young, few classification systems have been proposed in literature with incorporation of different patterns of dislocations identified over the years. We share our clinical experience of nine cases of such dislocations with 14 dislocated condyles, and on the basis of clinical and radiological findings coupled with the review of existing classification systems, we propose a new classification system which includes all the possible patterns of such dislocations overcoming the major shortcomings of preexisting classification systems identified by the authors.

Classification and Nomenclature: Progressive Collapsing Foot Deformity

2020 ◽  
Vol 41 (10) ◽  
pp. 1271-1276 ◽  
Author(s):  
Mark S. Myerson ◽  
David B. Thordarson ◽  
Jeffrey E. Johnson ◽  
Beat Hintermann ◽  
Bruce J. Sangeorzan ◽  
...  
Keyword(s):  
Classification System ◽  
Consensus Statement ◽  
Classification Systems ◽  
Posterior Tibial Tendon ◽  
Foot Deformity ◽  
New Classification ◽  
Level Of Evidence ◽  
3 Dimensional ◽  
Posterior Tibial ◽  
Consensus Statements

Recommendation: The historical nomenclature for the adult acquired flatfoot deformity (AAFD) is confusing, at times called posterior tibial tendon dysfunction (PTTD), the adult flexible flatfoot deformity, posterior tibial tendon rupture, peritalar instability and peritalar subluxation (PTS), and progressive talipes equinovalgus. Many but not all of these deformities are associated with a rupture of the posterior tibial tendon (PTT), and some of these are associated with deformities either primarily or secondarily in the midfoot or ankle. There is similar inconsistency with the use of classification schemata for these deformities, and from the first introduced by Johnson and Strom (1989), and then modified by Myerson (1997), there have been many attempts to provide a more comprehensive classification system. However, although these newer more complete classification systems have addressed some of the anatomic variations of deformities encountered, none of the above have ever been validated. The proposed system better incorporates the most recent data and understanding of the condition and better allows for standardization of reporting. In light of this information, the consensus group proposes the adoption of the nomenclature “Progressive Collapsing Foot Deformity” (PCFD) and a new classification system aiming at summarizing recent data published on the subject and to standardize data reporting regarding this complex 3-dimensional deformity. Level of Evidence: Level V, consensus, expert opinion. Consensus Statements Voted: CONSENSUS STATEMENT ONE: We will rename the condition to Progressive Collapsing Foot Deformity (PCFD), a complex 3-dimensional deformity with varying degrees of hindfoot valgus, forefoot abduction, and midfoot varus. Delegate vote: agree, 100% (9/9); disagree, 0%; abstain, 0%. (Unanimous, strongest consensus) CONSENSUS STATEMENT TWO: Our current classification systems are incomplete or outdated. Delegate vote: agree, 100% (9/9); disagree, 0%; abstain, 0%. (Unanimous, strongest consensus) CONSENSUS STATEMENT THREE: MRI findings should be part of a new classification system. Delegate vote: agree, 33% (3/9); disagree, 67% (6/9); abstain, 0%. (Weak negative consensus) CONSENSUS STATEMENT FOUR: Weightbearing CT (WBCT) findings should be part of a new classification system. Delegate vote: agree, 56% (5/9); disagree, 44% (4/9); abstain, 0%. (Weak consensus) CONSENSUS STATEMENT FIVE: A new classification system is proposed and should be used to stage the deformity clinically and to define treatment. Delegate vote: agree, 89% (8/9); abstain, 11% (1/9). (Strong consensus)

A simple system for classifying sugar maple vigour and quality

2015 ◽  
Vol 45 (7) ◽  
pp. 900-909 ◽  
Author(s):  
Malcolm J.L. Cecil-Cockwell ◽  
John P. Caspersen
Keyword(s):  
Classification System ◽  
Acer Saccharum ◽  
Sugar Maple ◽  
Selection Process ◽  
Classification Systems ◽  
High Quality ◽  
Northern Hardwood Forests ◽  
Northern Hardwood ◽  
Commercial Logging

In northern hardwood forests, treemarkers are responsible for selecting the trees to be harvested during commercial logging operations. They often select trees based on the presence and severity of defects, information that is used to assign trees to two or more vigour classes (reflecting the risk of dying or declining in growth) and two or more quality classes (reflecting the potential for recovering valuable sawlogs). Using these classes can simplify the tree selection process, but some classification systems may include superfluous classes beyond what is required to explain the variation in tree value. In this paper, we present a parsimonious classification system for sugar maple (Acer saccharum Marsh.) trees using formal classification analyses of empirical product recovery data. We also calculated the net value of trees in each class and assessed which defects affect tree value. Our results show that relatively few defects affect tree value, indicating that treemarkers should use a simpler classification system to describe the vigour and quality of trees. Specifically, we found that the best system contains just three classes: high vigour-high quality, low vigour-high quality, and low vigour-low quality. The use of this simple, easily implemented system would improve the ability of treemarkers to recognize the value of sugar maple trees when selecting the trees to be harvested during commercial logging operations.

scholarly journals The Buttazzoni Classification of Distal Radial Fractures in Adults: Interobserver and Intraobserver Reliability

Hand ◽  
2009 ◽  
Vol 4 (3) ◽  
pp. 283-288 ◽  
Author(s):  
Mats Å. Wadsten ◽  
Arkan S. Sayed-Noor ◽  
Gùran O. Sjù;dén ◽  
Olle Svensson ◽  
Gunnar G. Buttazzoni
Keyword(s):  
Classification System ◽  
Kappa Coefficient ◽  
Intraobserver Reliability ◽  
Classification Systems ◽  
Distal Radial Fracture ◽  
Radial Fracture ◽  
New Classification ◽  
Distal Radial Fractures ◽  
Orthopedic Surgeons ◽  
Fracture Types

Despite the fact that distal radial fracture is the commonest fracture, there is a little evidence-based knowledge about the value of its classification to guide management and predict prognosis. The available classification systems are either complicated or weakly applicable in clinical practice. Older's classification is the most reliable, but does not cover all radial fracture types. We evaluated the interobserver and intraobserver reliability of a new classification system which is a modification of Older's classification covering all radial fracture types. Two hundred and thirty-two consecutive adult patients with acute distal radial fractures were blindly evaluated according to the new classification by three orthopedic surgeons twice with 1-year interval. The interobserver reliability was measured using the Fleiss kappa coefficient, and the intraobserver reliability was measured using the Cohen's kappa coefficient. The new classification showed fair to substantial interobserver and intraobserver reliability, i.e., results comparable to the reliability of commonly used classification systems. The reliability was better for younger patients and when evaluation was carried out by hand-surgery-interested orthopedic surgeons. The new classification system is simple, covers all radial fracture types, and has an acceptable reliability. Further studies are needed to judge its ability to direct management and predict prognosis.

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