scholarly journals Precision Rock Excavation: Beyond Controlled Blasting and Line Drilling

Mining ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 192-210
Author(s):  
Marilena Cardu ◽  
Simone Saltarin ◽  
Carmine Todaro ◽  
Chiara Deangeli
Keyword(s):  
Daily Practice ◽  
Open Pit ◽  
Rock Excavation ◽  
Rock Breakage ◽  
Blast Parameters ◽  
Final Profile

The strictness of the result of an excavation, whether mechanical or by means of explosives, is naturally conditioned by its objective and, therefore, by the type of technique applied to achieve it. To attain the best results in terms of rock breakage, and with respect to the final profile, it is important to evaluate the specific excavation energy and its optimization. This study, being a revision of different techniques to achieve good quality of the final walls, focuses on evaluating the effects of those techniques on the quality of the result, in both open-pit and underground operations. Different geometries and configurations can be applied to both quarrying and tunneling blasts. This study aims to push contour blasts to their limits, and the main aspects are discussed in order to improve the blast parameters in daily practice.

scholarly journals Precision Rock Excavation: Beyond Controlled Blasting and Line Drilling

2021 ◽  
Author(s):  
Marilena Cardu ◽  
Simone Saltarin ◽  
Carmine Todaro ◽  
Chiara Deangeli
Keyword(s):  
Specific Energy ◽  
Daily Practice ◽  
Open Pit ◽  
Rock Excavation ◽  
Rock Breakage ◽  
Blast Parameters ◽  
Final Profile

The strictness of the result of an excavation, whether mechanical or by means of explosives, is naturally conditioned by the objective, and therefore by the type of technique applied to achieve it. To attain the best results in terms of rock breakage and respect of the final profile, it’s important to evaluate the excavation specific energy and its optimization. This research focuses on evaluating the effects of different techniques on the quality of final walls in open-pit and underground operations. Different geometries and configurations can be applied to both quarrying and tunnelling blasts. The research is aimed to push contour blasts to their limits, and the main aspects are discussed in order to improve the blast parameters in the daily practice.

Management and engineering solutions to improve processing stock quality and reduce resource-intensity of mining

2018 ◽  
pp. 56-68
Author(s):  
V. V. Agafonov ◽  
V. Yu. Zalyadinov ◽  
M. E. Yusupov ◽  
N. S. Bikteeva
Keyword(s):  
Development Strategy ◽  
Open Pit ◽  
Mining Operations ◽  
High Concern ◽  
General Production ◽  
Resource Intensity ◽  
Product Output ◽  
And Control ◽  
A Company

Sustainability of mining companies is of of high concern. The problem is specifically acute at companies that are monotownor monosettlement-forming. Sustainability of a mine depends in many ways on product quality and production resource-intensity. This article discusses formation of mineral quality indexes in terms of an open pit chrysotile mine. The studies took into account specific features of operation procedures implemented by each structural division of the mine. The analysis has found managerial and technological inconsistencies which affect quality and marketable product output, as well as efficiency of the mine in whole. The background for efficiency enhancement at a company is, by the authors’ opinion, consolidation of personnel subject to the single development strategy, namely: improvement of production and control efficiency, as well as use of available reserves and resources by means of better setup for production. The proposed approaches to planning mining operations and forming mineral quality allow higher quality of processing stock. In addition, a new model proposed for interaction between structural divisions of a mining company ensures improvement of general production indexes.

Qualitative assessment of equipment failure cause finding and removal

2018 ◽  
pp. 116-126
Author(s):  
E. A. Vakulin ◽  
A. I. Zayats ◽  
V. A. Beklemeshev ◽  
V. A. Ivashkevich ◽  
V. A. Khazhiev ◽  
...  
Keyword(s):  
Production Condition ◽  
Real Life ◽  
Open Pit Mine ◽  
Qualitative Assessment ◽  
Open Pit ◽  
Quality Level ◽  
Equipment Failure ◽  
Operation Conditions ◽  
Failure Investigation

Investigation of failures is one of the critical activities of mining and haulage equipment operability assurance in mining. Maintaining failure investigation at the required quality level, it is possible to identify provisions, rules and procedures that should be revised or changed, operation conditions that should be improved, additional personnel training, if required, etc. Investigation of failures in mines is under responsibility of machine men and electricians of maintenance and operation services. In reality, factory management and setup for production condition weak concernment of these workers in quality investigation aimed at finding of sources of equipment failures. This article describes real-life results achieved in development and use of maintenance service operation, technology and management monitoring. The requirements are substantiated for quality improvement in failure cause finding and removal in mining and haulage equipment at Chernogorsky open pit mine, SUEK-Khakassia. Causes of the present quality of failure investigation by machine men of Chernogorsky Repair and Engineering Works and Chernogorsky open pit mine are revealed. The proposed recommended practices will improve quality of mining and haulage equipment failure investigation.

scholarly journals Comprehensive Overview of Sleep Disorders in Patients with Chronic Liver Disease

2021 ◽  
Vol 11 (2) ◽  
pp. 142
Author(s):  
Oana-Mihaela Plotogea ◽  
Madalina Ilie ◽  
Simona Bungau ◽  
Alexandru Laurentiu Chiotoroiu ◽  
Ana Maria Alexandra Stanescu ◽  
...  
Keyword(s):  
Sleep Disorders ◽  
Daily Practice ◽  
Chronic Liver ◽  
Asian Countries ◽  
Chronic Liver Diseases ◽  
Comprehensive Overview ◽  
The Usa ◽  
The Impact ◽  
Reliable Methods

The impact of sleep disorders (SDs) on patients with chronic liver diseases (CLD) is tremendous. SDs are frequently encountered among these patients and interfere with their quality of life. This review aims to present the data available so far about the prevalence, phenotypes, and proposed pathophysiological mechanisms of SDs in CLD. Moreover, we proposed to search the literature regarding the most reliable methods to assess SDs and the possible therapeutic options in patients with CLD. The main results of this review show that when it comes to prevalence, the percentages reported vary widely between studies performed among populations from the USA or Europe and those coming from Asian countries. Furthermore, it has been proven that SDs may also be present in the absence of neurocognitive disorders attributable to hepatic encephalopathy (HE), which contradicts traditional suppositions where SDs were considered part of the clinical scenario of HE. Currently, there are no specific recommendations or protocols to assess SDs in CLD patients and data about the therapeutic management are limited. Taking into consideration their impact, a protocol for diagnosing and managing SDs should be developed and included in the daily practice of hepatologists.

scholarly journals Microsurgical Anatomy of the Anterior Circulation of the Brain Adjusted to the Neurosurgeon’s Daily Practice

2021 ◽  
Vol 11 (4) ◽  
pp. 519
Author(s):  
Tomas Poblete ◽  
Daniel Casanova ◽  
Miguel Soto ◽  
Alvaro Campero ◽  
Jorge Mura
Keyword(s):  
Daily Practice ◽  
Computed Tomographic Angiography ◽  
Poor Quality ◽  
Surgical Anatomy ◽  
Microsurgical Anatomy ◽  
Anterior Circulation ◽  
Computed Tomographic ◽  
Intrinsic Complexity ◽  
Tomographic Angiography

The study of cerebrovascular anatomy can be difficult and may take time due to its intrinsic complexity. However, it can also be difficult for the following reasons: the excessive description of neuroanatomy making articles hard to read, the unclear clinical application of what is written, the use of simplified or intricate schematic drawings that are not always appropriate for effective teaching, the poor quality of neuroanatomy dissections and the use of unusual views of figures that are not strictly related to the most frequent neuroimages to be interpreted in daily practice. Because of this, we designed an article that incorporates original and accurate anatomical dissections in an attempt to improve its comprehensibility. Five formalin-fixed adult cadaveric heads, whose vessels were injected with a colored silicone mixture (red for arteries and blue for veins), were dissected and examined under a microscope with magnifications from 3× to 40×. Special emphasis has been placed on correlating topographic anatomy with routine neuroimaging studies from computed tomographic angiography (CTA) and digital subtraction angiography (DSA). The essential surgical anatomy in a neurosurgeon’s daily practice is also described. The cadaveric dissections included in this study contribute to the understanding of the cerebrovascular anatomy necessary for the neurosurgeon’s daily practice.

Career advancement or teacher development? Teachers’ perceptions of writing publications in China

2014 ◽  
Vol 28 (3) ◽  
pp. 306-318
Author(s):  
Jocelyn L.N. Wong
Keyword(s):  
Teacher Development ◽  
Career Advancement ◽  
Teacher Educators ◽  
Daily Practice ◽  
Teaching Profession ◽  
Contributing Factors ◽  
Content Type ◽  
Teachers Perceptions ◽  
Systematic Training

Purpose – Studies in teacher research have seldom discussed the effects of writing publications and teachers’ views on it. This paper aims to examine how teachers in China regard the purpose of writing up research papers and its impact on their professional practice. It also investigates facilitating factors in preparing and writing publications. Design/methodology/approach – This is a qualitative study which mainly analyses interview data gathered from 14 teachers, who have experience in writing publications, from three schools in Shanghai, China. Documentary analysis includes selected published journal papers and book chapters of the interviewees. Findings – Findings show that teachers perceive producing publications as serving both an instrumental purpose of career advancement and a developmental purpose of enhancing their individual professional competency which in turn improves the quality of the teaching profession through knowledge transfer and knowledge transportation. Research limitations/implications – Contributing factors to help teachers to write include the provision of systematic training courses for teachers and the development of network and research partners. Originality/value – Findings of this study help school leaders and teacher educators better their understanding of improving the quality of practice of teachers through equipping them with a “stance of inquiry”. Findings suggest ways to provide relevant support to enhance the writing capacity of teachers. More importantly, a revision of the existing teacher promotion system may make the practice of writing publications of more direct value to teachers’ daily practice.

scholarly journals Consumer Satisfaction with the Services of Prosthetics and Orthotics Facilities

2009 ◽  
Vol 33 (1) ◽  
pp. 69-77 ◽  
Author(s):  
Joline Bosmans ◽  
Jan Geertzen ◽  
Pieter U. Dijkstra
Keyword(s):  
The Netherlands ◽  
Consumer Satisfaction ◽  
Daily Practice ◽  
Delivery Time ◽  
Satisfactory Quality

Consumer satisfaction with the services provided in a prosthetics and orthotics (P&O) facility has seldom been studied. The aim of this study was to analyze consumer satisfaction regarding the services provided by 15 P&O facilities in The Netherlands. Consumers ( n = 1,364) of these P&O facilities who were fitted with a prosthesis, orthopaedic shoes, an orthosis, or another device, were asked to rate the overall services provided and whether they were satisfied with the device provided and its delivery time. Additionally, they filled in a modified SERVQUAL questionnaire (see Appendix). Consumers gave the service provided by P&O facilities a mean overall rating of 8.1. The highest ratings were given by consumers fitted with a prosthesis (mean overall rating of services: 8.4). In total, 78% of the consumers were satisfied with the device provided and 93% with the delivery time. The results of our study showed that, on the SERVQUAL, 50% of the statements fulfilled the criteria for a satisfactory quality of the services. The overall consumer rating of the service provided by P&O facilities is high and depends on the device provided. The outcomes on the SERVQUAL were moderate. In future, it is important to study consumer satisfaction more extensively in order to improve the quality of P&O services in daily practice. Additionally, specific questionnaires need to be developed to measure all aspects of prosthetic and orthotic care, with the aim to improve the services.

scholarly journals The Use of Integrated Lessons in Professional Educational Organizations for the Formation of Skills to Solve Applied Problems

2019 ◽  
Vol 5 (4) ◽  
pp. 476-482
Author(s):  
O. Sursyakova
Keyword(s):  
General Education ◽  
Vocational Education ◽  
Daily Practice ◽  
Mathematical Education ◽  
Educational Organizations ◽  
School Teachers ◽  
Secondary Vocational Education ◽  
Professional Activities ◽  
Positive Results

In the professional educational organizations implementing the educational program of secondary General education within the development of professional educational on the basis of the main General education, studying of mathematics has the features depending on a profile of secondary vocational education. Profiling goals of mathematical education are reflected in the choice of priorities in the organization of educational activities of students. The scientific and technological revolution in all areas of human activity imposes new requirements on knowledge, technical culture, General and applied nature of education. This poses new challenges for the professional educational to improve education. The applied orientation of the school course of mathematics is carried out in order to improve the quality of mathematical education of student’s, the application of their mathematical knowledge to solve problems of daily practice and further professional activities. The article is devoted to the peculiarities and importance of integrated classes ‘Mathematics and Chemistry’ for obtaining professional skills in secondary vocational education. Experimental work has yielded positive results. The significance of the research: the materials of the article can be useful for school teachers of mathematics.

Implementing a patient-centred outcome measure in daily routine in a specialist palliative care inpatient hospital unit: An observational study

2016 ◽  
Vol 31 (3) ◽  
pp. 275-282 ◽  
Author(s):  
Alze Pereira dos Santos Tavares ◽  
Carolina Paparelli ◽  
Carolina Sassaki Kishimoto ◽  
Silvia Avo Cortizo ◽  
Karen Ebina ◽  
...  
Keyword(s):  
Palliative Care ◽  
Quality Of Care ◽  
Missing Data ◽  
Outcome Measure ◽  
Symptom Control ◽  
Daily Practice ◽  
Daily Routine ◽  
Palliative Care Outcome Scale ◽  
Care Outcome

Background: Gathering clinical evidence data on patients’ palliative care needs is paramount to identify changes in outcomes over time and maintaining on-going quality improvement. Implementation of patient-centred outcome measures has been widely recommended. The routine use of these instruments in daily practice is challenging and not widespread. Aim: To implement a patient-centred outcome measure in daily practice and fulfil one quality indicator: improve pain during the 72 h after admission, in at least 75% of patients. Design: An observational prospective study. The Palliative care Outcome Scale was used at admission (T0), third day (T1) and weekly. Setting/participants: Hospital palliative care unit with 17 individual rooms. All patients admitted to the unit were included in the study. Results: Preliminary results ( N = 84) revealed inconsistent and missing data (14%). Symptoms were sub-optimally controlled by T1. Processes changed, and only a team member could apply Palliative care Outcome Scale. Doctors were encouraged to grasp the meaning of Palliative care Outcome Scale results for each patient. The post-pilot included 317 patients. No missing data occurred. There was an improvement in most items between T0 and T1: ‘pain’ and ‘other symptoms’ presented statistical significant differences ( p < 0.05). Conclusion: Implementing a patient-centred outcome measure in a hospital palliative care service is feasible and improves quality of care. Controlling high pain at T0 improved (>80%) by T1. Results became more consistent and symptom control was improved overall. Patients are evaluated based on holistic domains by an interdisciplinary team and we have added a much needed measure to help guide improvement of the quality of care provided.

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