Drone Magnetometry in Mining Research. An Application in the Study of Triassic Cu–Co–Ni Mineralizations in the Estancias Mountain Range, Almería (Spain)

The use of drones in mining and geological exploration is under rapid development, especially in the field of magnetic field prospection. In part, this is related to the advantages presented for over ground surveys, allowing for high-density data acquisition with low loss of resolution, while being particularly useful in scenarios where vegetation, topography, and access are limiting factors. This work analyzes results of a drone magnetic survey acquired across the old mines of Don Jacobo, where Copper-Cobalt-Nickel stratabound mineralizations were exploited in the Estancias mountain range of the Betic Cordillera, Spain. The survey carried out used a vapor magnetometer installed on a Matrice 600 Pro Hexacopter. Twenty-four parallel survey lines were flown with a speed of 5 m/s, orthogonal to the regional strike of the geological structure, and mineralization with 50 m line separation and 20 m flight height over the ground was studied. The interpretation of the magnetic data allows us to reveal and model two high magnetic susceptibility bodies with residual magnetization, close to the old mines and surface mineral shows. These bodies could be related to potential unexploited mineralized areas whose formation may be related to a normal fault placed to the south of the survey area. Our geophysical survey provides essential data to improve the geological and mining potential of the area, allowing to design future research activities.

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SME’s Performance Through Comparative Performance Indicators, Measured by Business Statistics- Albania Case

European Journal of Economics and Business Studies ◽

10.26417/ejes.v9i1.p361-370 ◽

2017 ◽

Vol 9 (1) ◽

pp. 361

Author(s):

Godiva Rembeci

Keyword(s):

Economic Performance ◽

National Economy ◽

Performance Indicators ◽

Future Research ◽

Productivity Measurement ◽

Comparative Performance ◽

Global Consensus ◽

Research Activities ◽

Business Statistics ◽

National Economies

Now days there is a global consensus among all stakeholders that SMEs represent a driving force to the overall economic development, due to their significant contribution both on GDP and employment of national economies. SMEs also by numbers dominate the world business stage, although their contribution does vary among the countries. SMEs in Albania represents about 98% of the total enterprises with a contribution to national GDP for about 70%. The structure and the performance of national economy is depended very much on the economic performance and contribution of SME, that’s why most of the governments have strategic programmes which support the SME’s development. To measure SMEs’ performance and their ability to compete on national and international markets requires a lot of information in all aspects. Through this paper the author aims to measure and analyze the economic performance of SMEs operating in Albania. To achieve this objective, official data on business statistics published by national the statistical office (INSTAT) are used for two years period 2014-2015. In addition using an international framework addressed to the objective “improve the techniques for SMEs productivity measurement”, for the first time, a set of comparative performance indicators is established and in doing so, those results can be used as term of reference in future research activities in SMEs sector. From the results it came out that although the positive growth rate of GDP during the last years , the performance indicators of SMEs show a slightly negative trend, indicating indirectly the need for support, in order to empower their contribution in national economy.

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Airborne geophysical surveys in Greenland in 1998

Geological Survey of Denmark and Greenland Bulletin ◽

10.34194/ggub.v183.5202 ◽

1999 ◽

pp. 34-38 ◽

Cited By ~ 2

Author(s):

Thorkild M. Rasmussen ◽

Leif Thorning

Keyword(s):

High Resolution ◽

Geophysical Data ◽

Digital Data ◽

Geological Survey ◽

Magnetic Data ◽

Magnetic Survey ◽

Original Series ◽

Geophysical Surveys ◽

The Government

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Rasmussen, T. M., & Thorning, L. (1999). Airborne geophysical surveys in Greenland in 1998. Geology of Greenland Survey Bulletin, 183, 34-38. https://doi.org/10.34194/ggub.v183.5202 _______________ Airborne geophysical surveying in Greenland during 1998 consisted of a magnetic project referred to as ‘Aeromag 1998’ and a combined electromagnetic and magnetic project referred to as ‘AEM Greenland 1998’. The Government of Greenland financed both with administration managed by the Geological Survey of Denmark and Greenland (GEUS). With the completion of the two projects, approximately 305 000 line km of regional high-resolution magnetic data and approximately 75 000 line km of detailed multiparameter data (electromagnetic, magnetic and partly radiometric) are now available from government financed projects. Figure 1 shows the location of the surveyed areas with highresolution geophysical data together with the area selected for a magnetic survey in 1999. Completion of the two projects was marked by the release of data on 1 March, 1999. The data are included in the geoscientific databases at the Survey for public use; digital data and maps may be purchased from the Survey.

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Compact Quantum Magnetometer System on an Agile Underwater Glider

Sensors ◽

10.3390/s21041092 ◽

2021 ◽

Vol 21 (4) ◽

pp. 1092

Author(s):

Brian R. Page ◽

Reeve Lambert ◽

Nina Mahmoudian ◽

David H. Newby ◽

Elizabeth L. Foley ◽

...

Keyword(s):

Test Procedure ◽

Reduction Process ◽

Ground Truth ◽

Sensor Technology ◽

Magnetic Data ◽

Magnetic Survey ◽

Underwater Glider ◽

Combined System ◽

Extended Operation ◽

Quantum Magnetometer

This paper presents results from the integration of a compact quantum magnetometer system and an agile underwater glider for magnetic survey. A highly maneuverable underwater glider, ROUGHIE, was customized to carry an increased payload and reduce the vehicle’s magnetic signature. A sensor suite composed of a vector and scalar magnetometer was mounted in an external boom at the rear of the vehicle. The combined system was deployed in a constrained pool environment to detect seeded magnetic targets and create a magnetic map of the test area. Presented is a systematic magnetic disturbance reduction process, test procedure for anomaly mapping, and results from constrained operation featuring underwater motion capture system for ground truth localization. Validation in the noisy and constrained pool environment creates a trajectory towards affordable littoral magnetic anomaly mapping infrastructure. Such a marine sensor technology will be capable of extended operation in challenging areas while providing high-resolution, timely magnetic data to operators for automated detection and classification of marine objects.

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Local Anesthetics and Recurrence after Cancer Surgery-What’s New? A Narrative Review

Journal of Clinical Medicine ◽

10.3390/jcm10040719 ◽

2021 ◽

Vol 10 (4) ◽

pp. 719

Author(s):

Sarah D. Müller ◽

Jonathan S. H. Ziegler ◽

Tobias Piegeler

Keyword(s):

Tumor Cells ◽

Circulating Tumor Cells ◽

Local Anesthetics ◽

Experimental Studies ◽

Perioperative Period ◽

Cancer Surgery ◽

Narrative Review ◽

Future Research ◽

Inflammatory Stress ◽

Research Activities

The perioperative use of regional anesthesia and local anesthetics is part of almost every anesthesiologist’s daily clinical practice. Retrospective analyses and results from experimental studies pointed towards a potential beneficial effect of the local anesthetics regarding outcome—i.e., overall and/or recurrence-free survival—in patients undergoing cancer surgery. The perioperative period, where the anesthesiologist is responsible for the patients, might be crucial for the further course of the disease, as circulating tumor cells (shed from the primary tumor into the patient’s bloodstream) might form new micro-metastases independent of complete tumor removal. Due to their strong anti-inflammatory properties, local anesthetics might have a certain impact on these circulating tumor cells, either via direct or indirect measures, for example via blunting the inflammatory stress response as induced by the surgical stimulus. This narrative review highlights the foundation of these principles, features recent experimental and clinical data and provides an outlook regarding current and potential future research activities.

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Algorithmic management in a work context

Big Data & Society ◽

10.1177/20539517211020332 ◽

2021 ◽

Vol 8 (2) ◽

pp. 205395172110203

Author(s):

Mohammad Hossein Jarrahi ◽

Gemma Newlands ◽

Min Kyung Lee ◽

Christine T. Wolf ◽

Eliscia Kinder ◽

...

Keyword(s):

Information Exchange ◽

Rapid Development ◽

Machine Learning Algorithms ◽

Organizational Level ◽

Future Research ◽

Power Dynamics ◽

Work Processes ◽

Work Settings ◽

Standard Work ◽

Management Functions

The rapid development of machine-learning algorithms, which underpin contemporary artificial intelligence systems, has created new opportunities for the automation of work processes and management functions. While algorithmic management has been observed primarily within the platform-mediated gig economy, its transformative reach and consequences are also spreading to more standard work settings. Exploring algorithmic management as a sociotechnical concept, which reflects both technological infrastructures and organizational choices, we discuss how algorithmic management may influence existing power and social structures within organizations. We identify three key issues. First, we explore how algorithmic management shapes pre-existing power dynamics between workers and managers. Second, we discuss how algorithmic management demands new roles and competencies while also fostering oppositional attitudes toward algorithms. Third, we explain how algorithmic management impacts knowledge and information exchange within an organization, unpacking the concept of opacity on both a technical and organizational level. We conclude by situating this piece in broader discussions on the future of work, accountability, and identifying future research steps.

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IoT Cloud Security Review

ACM Computing Surveys ◽

10.1145/3447625 ◽

2021 ◽

Vol 54 (4) ◽

pp. 1-36

Author(s):

Fei Chen ◽

Duming Luo ◽

Tao Xiang ◽

Ping Chen ◽

Junfeng Fan ◽

...

Keyword(s):

Case Studies ◽

Service Providers ◽

Risk Mitigation ◽

Rapid Development ◽

Security Analysis ◽

Cloud Security ◽

Future Research ◽

Security Risk ◽

Research Attention ◽

Cloud Systems

Recent years have seen the rapid development and integration of the Internet of Things (IoT) and cloud computing. The market is providing various consumer-oriented smart IoT devices; the mainstream cloud service providers are building their software stacks to support IoT services. With this emerging trend even growing, the security of such smart IoT cloud systems has drawn much research attention in recent years. To better understand the emerging consumer-oriented smart IoT cloud systems for practical engineers and new researchers, this article presents a review of the most recent research efforts on existing, real, already deployed consumer-oriented IoT cloud applications in the past five years using typical case studies. Specifically, we first present a general model for the IoT cloud ecosystem. Then, using the model, we review and summarize recent, representative research works on emerging smart IoT cloud system security using 10 detailed case studies, with the aim that the case studies together provide insights into the insecurity of current emerging IoT cloud systems. We further present a systematic approach to conduct a security analysis for IoT cloud systems. Based on the proposed security analysis approach, we review and suggest potential security risk mitigation methods to protect IoT cloud systems. We also discuss future research challenges for the IoT cloud security area.

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Surface-Rupturing Historical Earthquakes in Australia and Their Environmental Effects: New Insights from Re-Analyses of Observational Data

Geosciences ◽

10.3390/geosciences9100408 ◽

2019 ◽

Vol 9 (10) ◽

pp. 408 ◽

Cited By ~ 12

Author(s):

King ◽

Quigley ◽

Clark

Keyword(s):

Observational Data ◽

Environmental Effects ◽

Active Faults ◽

Magnetic Data ◽

Future Research ◽

Surface Rupture ◽

Secondary Fracture ◽

Geological Evidence ◽

Surface Ruptures ◽

Strong Control

We digitize surface rupture maps and compile observational data from 67 publications on ten of eleven historical, surface-rupturing earthquakes in Australia in order to analyze the prevailing characteristics of surface ruptures and other environmental effects in this crystalline basement-dominated intraplate environment. The studied earthquakes occurred between 1968 and 2018, and range in moment magnitude (Mw) from 4.7 to 6.6. All earthquakes involved co-seismic reverse faulting (with varying amounts of strike-slip) on single or multiple (1–6) discrete faults of ≥ 1 km length that are distinguished by orientation and kinematic criteria. Nine of ten earthquakes have surface-rupturing fault orientations that align with prevailing linear anomalies in geophysical (gravity and magnetic) data and bedrock structure (foliations and/or quartz veins and/or intrusive boundaries and/or pre-existing faults), indicating strong control of inherited crustal structure on contemporary faulting. Rupture kinematics are consistent with horizontal shortening driven by regional trajectories of horizontal compressive stress. The lack of precision in seismological data prohibits the assessment of whether surface ruptures project to hypocentral locations via contiguous, planar principal slip zones or whether rupture segmentation occurs between seismogenic depths and the surface. Rupture centroids of 1–4 km in depth indicate predominantly shallow seismic moment release. No studied earthquakes have unambiguous geological evidence for preceding surface-rupturing earthquakes on the same faults and five earthquakes contain evidence of absence of preceding ruptures since the late Pleistocene, collectively highlighting the challenge of using mapped active faults to predict future seismic hazards. Estimated maximum fault slip rates are 0.2–9.1 m Myr-1 with at least one order of uncertainty. New estimates for rupture length, fault dip, and coseismic net slip can be used to improve future iterations of earthquake magnitude—source size—displacement scaling equations. Observed environmental effects include primary surface rupture, secondary fracture/cracks, fissures, rock falls, ground-water anomalies, vegetation damage, sand-blows / liquefaction, displaced rock fragments, and holes from collapsible soil failure, at maximum estimated epicentral distances ranging from 0 to ~250 km. ESI-07 intensity-scale estimates range by ± 3 classes in each earthquake, depending on the effect considered. Comparing Mw-ESI relationships across geologically diverse environments is a fruitful avenue for future research.

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Pituitary Apoplexy Causing Compression of Third Cranial Nerve—Management

Indian Journal of Neurosurgery ◽

10.1055/s-0039-1694849 ◽

2019 ◽

Vol 08 (02) ◽

pp. 119-122

Author(s):

Václav Masopust

Keyword(s):

Cavernous Sinus ◽

Nerve Palsy ◽

Clinical Symptoms ◽

Rapid Development ◽

Sella Turcica ◽

Oculomotor Nerve ◽

Oculomotor Nerve Palsy ◽

Future Research ◽

Third Nerve Palsy ◽

Increased Pressure

AbstractLesions of the oculomotor nerve as the first sign of pituitary adenoma are rare. The cause of such lesions without other clinical symptoms is discussed in this study. A small cohort of 4 patients (3.1%) with oculomotor nerve palsy (third nerve palsy) as the only neurologic deficit, from 129 patients who got operated upon for pituitary adenomas, is presented. In this group (mean age: 55 years, range: 36–65 years), all patients (two women and two men) underwent surgery. In two cases, there was arrested pneumatization and thickened bone. In the remaining two cases, a macroscopically visible, very solid opaque diaphragm was present, after the removal of the tumor and thickened bone. Complete adjustment was observed in all patients within 1 week after the surgery. Two factors that seem to increase the high risk for the development of oculomotor nerve palsy are that the cavernous sinus may be the only weak structure surrounding the sella turcica when the diaphragm and bone are thickened; and the rapid development of increased pressure in this region. The increased pressure on the cavernous sinus during the anatomical variations is the primary cause for lesions on the oculomotor nerve. However, this conjecture cannot be statistically demonstrated because of the small number of cases. Future research should be conducted on larger samples to increase statistical inference and generalizability.

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Modeling of Piezo-Actuated Stick-Slip Micro-Drives: An Overview

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.81.39 ◽

2012 ◽

Vol 81 ◽

pp. 39-48 ◽

Cited By ~ 12

Author(s):

Ha Xuan Nguyen ◽

Christoph Edeler ◽

Sergej Fatikow

Keyword(s):

Mechanical Model ◽

Integrated Model ◽

Friction Model ◽

Fundamental Importance ◽

Future Research ◽

Stick Slip ◽

Research Activities ◽

Model Combining ◽

Friction Models

This paper gives an overview about problems of modeling of piezo-actuated stick-slip micro-drives. It has been found that existing prototypes of such devices have been investigated empirically. There is only few research dealing with the theory behind this kind of drives. By analyzing the current research activities in this field, it is believed that the model of the drive depends strongly on the friction models, but in most cases neglecting any influences of the guilding system.These analyses are of fundamental importance for an integrated model combining friction model and mechanical model offering promising possibilities for future research.

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Digital competences of the workforce – a research topic?

Business Process Management Journal ◽

10.1108/bpmj-06-2016-0126 ◽

2017 ◽

Vol 23 (3) ◽

pp. 721-734 ◽

Cited By ~ 21

Author(s):

Matthias Murawski ◽

Markus Bick

Keyword(s):

Research Topic ◽

Future Research ◽

Digital Competence ◽

Content Type ◽

Research Activities ◽

Starting Point ◽

Pros And Cons ◽

Definition Of ◽

The Individual ◽

Practical Implications

Purpose Considering working in the digital age, questions on the consequences for the individual workers are, so far, often neglected. The purpose of this paper is to deal with the question of whether the digital competences of the workforce is a research topic. The authors argue for the thesis that it is indeed a research topic. Design/methodology/approach In addition to a literature analysis of the top IS, HR, and learning publications, non-scientific sources, as well as the opinions of the authors, are included. The authors’ thesis is challenged through a debate of corresponding pros and cons. Findings The definition of digital competences lacks scientific depth. Focussing on the workforce is valid, as a “lifelong” perspective is not mandatory for research. Digital competence research is a multidisciplinary task to which the IS field can make a valuable contribution. Research limitations/implications Although relevant references are included, some aspects are mainly driven by the opinions of the authors. The theoretical implications encompass a call for a scientific definition of digital competences. Furthermore, scholars should focus on the competences of the workforce, including occupations, roles, or industries. The authors conclude by providing a first proposal of a research agenda. Practical implications The practical implications include the alignment of multiple stakeholders for the design of “digital” curricula and the integration by HR departments of the construct of digital competences, e.g. for compensation matters and job requirements. Originality/value This paper is one of very few contributions in the area of the digital competences of the workforce, and it presents a starting point for future research activities.

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