scholarly journals Glacial Ripping in Sedimentary Rocks: Loch Eriboll, NW Scotland

2021 ◽  
Author(s):  
Adrian Malcolm Hall ◽  
Hannah Mathers ◽  
Maarten Krabbendam
Keyword(s):  
Short Distance ◽  
Sedimentary Rocks ◽  
High Impact ◽  
Cosmogenic Isotope ◽  
Field Surveys ◽  
Process Sequence ◽  
Quartz Arenite ◽  
Three Stages ◽  
Hydraulic Jacking

Glacial ripping is a newly recognized process sequence in which subglacial erosion is triggered by groundwater overpressure. Investigations in gneiss terrain in lowland Sweden indicate that ripping involves three stages of (i) hydraulic jacking, (ii) rock disruption under subglacial traction and (iii) glacial transport of rock blocks. Evidence for each stage includes, respectively, dilated fractures with sediment fills, disintegrated roches moutonnées and boulder spreads. Here we ask: can glacial ripping also occur in sedimentary rocks, and, if so, what are its effects? The case study area is in hard, thinly bedded, gently dipping Cambrian quartz-arenites at Loch Eriboll, NW Scotland. Field surveys reveal dilated, sediment filled, bedding-parallel fractures, open joints and brecciated zones, interpreted as markers for pervasive, shallow penetration of the quartz-arenite by water at over-pressure. Other features, including disintegrated rock surfaces, boulder spreads and monomict rubble tills, indicate glacial disruption and short distance subglacial transport. The field results, together with published cosmogenic isotope ages, indicate that glacial ripping operated with high impact close to the former ice margin at Loch Eriboll at 17.6-16.5 ka. Glacial ripping thus can operate effectively in bedded, hard sedimentary rocks and the accompanying brecciation is significant – if not dominant - in till formation. Candidate markers for glacial ripping are identified in other sedimentary terrains in former glaciated areas of the Northern Hemisphere.

scholarly journals Glacial Ripping in Sedimentary Rocks: Loch Eriboll, NW Scotland

Geosciences ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 232
Author(s):  
Adrian M. Hall ◽  
Hannah Mathers ◽  
Maarten Krabbendam
Keyword(s):  
Short Distance ◽  
Sedimentary Rocks ◽  
High Impact ◽  
Cosmogenic Isotope ◽  
Field Surveys ◽  
Process Sequence ◽  
Quartz Arenite ◽  
Three Stages ◽  
Hydraulic Jacking

Glacial ripping is a newly recognized process sequence in which subglacial erosion is triggered by groundwater overpressure. Investigations in gneiss terrain in lowland Sweden indicate that ripping involves three stages of (i) hydraulic jacking, (ii) rock disruption under subglacial traction, and (iii) glacial transport of rock blocks. Evidence for each stage includes, respectively, dilated fractures with sediment fills, disintegrated roches moutonnées, and boulder spreads. Here, we ask: can glacial ripping also occur in sedimentary rocks, and, if so, what are its effects? The case study area is in hard, thinly bedded, gently dipping Cambrian quartz-arenites at Loch Eriboll, NW Scotland. Field surveys reveal dilated, sediment filled, bedding-parallel fractures, open joints, and brecciated zones, interpreted as markers for pervasive, shallow penetration of the quartz-arenite by water at overpressure. Other features, including disintegrated rock surfaces, boulder spreads, and monomict rubble tills, indicate glacial disruption and short distance subglacial transport. The field results together with cosmogenic isotope ages indicate that glacial ripping operated with high impact close to the former ice margin at Loch Eriboll at 17.6–16.5 ka. Glacial ripping thus can operate effectively in bedded, hard sedimentary rocks, and the accompanying brecciation is significant—if not dominant—in till formation. Candidate markers for glacial ripping are identified in other sedimentary terrains in former glaciated areas of the Northern Hemisphere.

scholarly journals A methodology to conduct wind damage field surveys for high impact weather events from convective origin

2019 ◽  
Author(s):  
Oriol Rodríguez ◽  
Joan Bech ◽  
Juan de Dios Soriano ◽  
Delia Gutiérrez ◽  
Salvador Castán
Keyword(s):  
High Impact ◽  
Strong Wind ◽  
Field Surveys ◽  
Weather Events ◽  
Damage Field ◽  
High Impact Weather ◽  
Strong Winds ◽  
Wind Events ◽  
The One

Abstract. Post-event damage assessments are essential to document the effects of high-impact weather events such as floods or strong wind events. Moreover, evaluating the damage and characterizing its extension and intensity can be helpful for further analysis such as completing a diagnostic meteorological case study. This paper presents a methodology to perform field surveys of damage caused by strong winds of convective origin, i.e. tornado, downburst and other types of convective winds. It is based on previous studies and also on 136 fieldworks performed by the authors in Spain from 2004 to 2018. The methodology includes the systematic collection of pictures and records of damages on man-made structures and on vegetation, as well as collection of any available Automatic Weather Station data, witness reports and images of the phenomenon and their location and orientation. Three final deliverables are proposed to synthesize the data recorded: (i) A summary of the fieldwork; (ii) A table consisting of detailed geolocated information about each damage, and (iii) A map or a .kml file containing the previous information ready for graphical display and further analysis. This methodology has been applied by the authors in the past, sometimes only a few hours after the event occurrence and, in many occasions, when the type of convective phenomenon (e.g. tornado, downburst) was uncertain. In the latter case the information resulting from this methodology has proofed very useful to discern the phenomenon type, based on the damage patterns particularly if no witness reports were available. The application of systematic methodologies as the one presented here is necessary in order to build homogeneous databases of severe weather cases and high impact weather events.

scholarly journals A methodology to conduct wind damage field surveys for high-impact weather events of convective origin

2020 ◽  
Vol 20 (5) ◽  
pp. 1513-1531 ◽  
Author(s):  
Oriol Rodríguez ◽  
Joan Bech ◽  
Juan de Dios Soriano ◽  
Delia Gutiérrez ◽  
Salvador Castán
Keyword(s):  
Field Studies ◽  
High Impact ◽  
Strong Wind ◽  
Field Surveys ◽  
Weather Events ◽  
Straight Line ◽  
High Impact Weather ◽  
Strong Winds ◽  
Wind Events ◽  
The One

Abstract. Post-event damage assessments are of paramount importance to document the effects of high-impact weather-related events such as floods or strong wind events. Moreover, evaluating the damage and characterizing its extent and intensity can be essential for further analysis such as completing a diagnostic meteorological case study. This paper presents a methodology to perform field surveys of damage caused by strong winds of convective origin (i.e. tornado, downburst and straight-line winds). It is based on previous studies and also on 136 field studies performed by the authors in Spain between 2004 and 2018. The methodology includes the collection of pictures and records of damage to human-made structures and on vegetation during the in situ visit to the affected area, as well as of available automatic weather station data, witness reports and images of the phenomenon, such as funnel cloud pictures, taken by casual observers. To synthesize the gathered data, three final deliverables are proposed: (i) a standardized text report of the analysed event, (ii) a table consisting of detailed geolocated information about each damage point and other relevant data and (iii) a map or a KML (Keyhole Markup Language) file containing the previous information ready for graphical display and further analysis. This methodology has been applied by the authors in the past, sometimes only a few hours after the event occurrence and, on many occasions, when the type of convective phenomenon was uncertain. In those uncertain cases, the information resulting from this methodology contributed effectively to discern the phenomenon type thanks to the damage pattern analysis, particularly if no witness reports were available. The application of methodologies such as the one presented here is necessary in order to build homogeneous and robust databases of severe weather cases and high-impact weather events.

scholarly journals Sensitivity Analysis of Fuzzy Activity-Based Life Cycle Costing

2018 ◽  
Vol 225 ◽  
pp. 05002
Author(s):  
Freselam Mulubrhan ◽  
Ainul Akmar Mokhtar ◽  
Masdi Muhammad
Keyword(s):  
Sensitivity Analysis ◽  
Life Cycle ◽  
Interest Rate ◽  
Life Cycle Costing ◽  
High Impact ◽  
Final Output ◽  
Left And Right ◽  
The Interest Rate ◽  
Operation Cost

A sensitivity analysis is typically conducted to identify how sensitive the output is to changes in the input. In this paper, the use of sensitivity analysis in the fuzzy activity based life cycle costing (LCC) is shown. LCC is the most frequently used economic model for decision making that considers all costs in the life of a system or equipment. The sensitivity analysis is done by varying the interest rate and time 15% and 45%, respectively, to the left and right, and varying 25% of the maintenance and operation cost. It is found that the operation cost and the interest rate give a high impact on the final output of the LCC. A case study of pumps is used in this study.

“Going Virtual Helped Me Learn That I Can Handle Everything”: Campus Magazine Production as a High Impact Practice During the COVID-19 Pandemic

2021 ◽  
pp. 107769582110232
Author(s):  
Zoe L. Lance ◽  
Chelsea J. Reynolds
Keyword(s):  
Empirical Evidence ◽  
High Impact ◽  
Theoretical Frameworks ◽  
Staff Members ◽  
Course Planning ◽  
Virtual Instruction ◽  
Professional Self ◽  
Working Media ◽  
High Impact Practice

This case study documents a large, 4-year university magazine’s transition to virtual instruction during the initial months of the COVID-19 pandemic. Using theoretical frameworks from Kuh’s work on high impact practices (HIPs), this analysis offers empirical evidence that virtual student newsrooms may provide impactful learning experiences during crisis situations. Based on interviews, surveys, and newsroom observation, 23 magazine staff members reported improvements in their professional self-efficacy as they overcame logistics challenges and interpersonal hurdles similar to working media professionals. The case study also identifies strengths and weaknesses of crisis pedagogy. Implications for post-pandemic pedagogy and course planning are discussed.

Implementation of InfraRed Thermographic surveys in complex coastal areas: the case study of Polignano a Mare (southern Italy)

2021 ◽  
Author(s):  
Lidia Loiotine ◽  
Marco La Salandra ◽  
Gioacchino Francesco Andriani ◽  
Eliana Apicella ◽  
Michel Jaboyedoff ◽  
...  
Keyword(s):  
Rock Mass ◽  
Structure From Motion ◽  
Southern Italy ◽  
Thermal Imager ◽  
Rock Masses ◽  
Field Surveys ◽  
Thermal Images ◽  
Thermal Anomalies ◽  
Rock Face

<p><em>InfraRed Thermography</em> (IRT) spread quickly during the second half of the 20<sup>th</sup> century in the military, industrial and medical fields. This technique is at present widely used in the building sector to detect structural defects and energy losses. Being a non-destructive diagnostic technique, IRT was also introduced in the Earth Sciences, especially in the volcanology and environmental fields, yet its application for geostructural surveys is of recent development. Indeed, the acquisition of thermal images on rock masses could be an efficient tool for identifying fractures and voids, thus detecting signs of potential failures.<br>Further tests of thermal cameras on rock masses could help to evaluate the applicability, advantages and limits of the IRT technology for characterizing rock masses in different geological settings.<br>We present some results of IRT surveys carried out in the coastal area of Polignano a Mare (southern Italy), and their correlation with other remote sensing techniques (i.e. <em>Terrestrial Laser Scanning</em> and <em>Structure from Motion</em>). The case study (<em>Lama Monachile</em>) is represented by a 20 m-high cliff made up of Plio-Pleistocene calcarenites overlying Cretaceous limestones. Conjugate fracture systems, karst features, folds and faults, were detected in the rock mass during field surveys. In addition, dense vegetation and anthropogenic elements, which at places modified the natural setting of the rock mass, represent relevant disturbances for the characterization of the rock mass. In this context, IRT surveys were added to the other techniques, aimed at detecting the major discontinuities and fractured zones, based on potential thermal anomalies. <br>IRT surveys were carried out in December 2020 on the east side of the rock mass at <em>Lama Monachile</em> site. Thermal images were acquired every 20 minutes for 24 hours by means of a FLIR T-660 thermal imager mounted on a fixed tripod. Ambient air temperature and relative humidity were measured during the acquisition with a pocketsize thermo-hydrometer. A reflective paper was placed at the base of the cliff to measure the reflected apparent temperature. In addition, three thermocouple sensors were fixed to the different lithologic units of the rock face. These parameters, together with the distance between the FLIR T-660 and the rock face, were used in order to calibrate the thermal imager and correct the apparent temperatures recorded by the device, during the post-processing phase. Successively, vertical profiles showing the temperature of the rock face over time were extracted from the thermograms. Thermal anomalies were correlated with stratigraphic and Geological Strength Index profiles, obtained by means of field surveys and Structure from Motion techniques. The presence of fracture and voids in the rock mass was also investigated.</p>

scholarly journals Promoting the Development of Enterprise Niche: Case Study on China’s Organizational Ambidexterity

2018 ◽  
Vol 10 (10) ◽  
pp. 3806 ◽  
Author(s):  
Ling Ding ◽  
Di Cao ◽  
Taohua Ouyang ◽  
Jin-xi Wu
Keyword(s):  
Process Model ◽  
Enterprise Management ◽  
Organizational Ambidexterity ◽  
Strategic Positioning ◽  
The Core ◽  
Cross Border ◽  
History Of ◽  
Core Issue ◽  
Three Stages

This paper aims to take the longitudinal development history of the Lenovo Cross-border complex nested R&D organization as the research object, to explore the development rules of enterprise niche. Strategic positioning is the core issue of enterprise management, and enterprise niche is the core issue of strategic positioning. This study elaborates on the three stages of enterprise R&D organizational ambidexterity promoting enterprise niche evolution, discusses the process model of space development, and reveals the life cycle of enterprise niche. It reveals the deep reason for promoting enterprise niche to develop—the ambidexterity of complex nested organization. The conclusion helps to promote the successful space development of enterprise niches through Cross-border merger and acquisition, and to enhance global sustainable development for the companies from emerging markets such as China.

Supply chain integration and coordination for international sourcing in the context of China’s processing trade

2018 ◽  
Vol 118 (9) ◽  
pp. 1730-1748 ◽  
Author(s):  
Mingu Kang ◽  
Kihyun Park ◽  
Ma Ga (Mark) Yang ◽  
Mark H. Haney
Keyword(s):  
Supply Chain ◽  
Single Case ◽  
Supply Chain Integration ◽  
Processing Trade ◽  
Content Type ◽  
Study Approach ◽  
International Sourcing ◽  
Three Stages ◽  
Simple Assembly

Purpose The purpose of this paper is to explore how a foreign invested manufacturing company’s (FIMC) components sourcing process evolves in order to improve its supply chain outcomes in the context of China’s processing trade. Design/methodology/approach Grounded in the theory bases of the international sourcing process and supply chain integration, this study utilizes a single-case-study approach with a small- to medium-sized FIMC engaged in China’s processing trade. Findings This study identifies three stages of the components sourcing process: simple assembly stage, components localization stage and supply chain integration stage. In addition, the case study suggests that the type of processing trade evolves from processing with supplied materials to processing with imported materials as the sourcing process proceeds through the three stages and the internal and external environments change. Originality/value To our knowledge, this paper is the first to focus on an FIMC’s components sourcing process in the context of China’s processing trade. It contributes to a better understanding of how FIMCs progress through the components sourcing process and apply different types of processing trade in China to maximize their supply chain outcomes.

scholarly journals Pengembangan Permukiman Nelayan Kingking dan Karangsari Tuban Melalui Pendekatan Urban Assemblage

2020 ◽  
Vol 18 (2) ◽  
pp. 12-23
Author(s):  
Tyas Santri ◽  
Keyword(s):  
Positive Impact ◽  
Coastal Areas ◽  
Tourism Industry ◽  
Service Industries ◽  
Surrounding Area ◽  
Field Surveys ◽  
Tourist Destinations ◽  
The Government ◽  
Cultural Strength

Indonesia is an archipelago country with a sea larger than the mainland, so it is undeniable that in Indonesia there are many fisherman settlements. Often fishermen settlements in Indonesia are marginalized in the development of maritime and service industries and even become victims of the activities of the utilization of coastal areas by the private sector engaged in tourism, industry, and services. The fisherman settlement community is not getting a positive impact from the development, therefore this study aims so that the fisherman settlement community can get a positive impact from the development of the surrounding area. This research takes a case study in the fisherman settlements of Kingking and Karangsari in Tuban Regency, East Java. The approach used in this research is the urban assemblage approach to reveal socio-cultural knits as a cultural force that shapes the sustainability of the place. The urban assemblage approach will be supported by search methods which will then be analyzed descriptively qualitatively. The search was carried out through literature review and field surveys. This research presents the results in the form of a mapping of knits between culture, social, the economy as the cultural strength of the Kingking and Karangsari fisherman settlements with the surrounding tourist areas. The results of this study can be considered by the government and local communities in planning the development of coastal areas or fisherman settlements into tourist destinations.

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