scholarly journals UAV survey method to Monitoring and analysing geological hazards: The Case study of mud volcano of Villaggio Santa Barbara, Caltanissetta (Sicily)

Author(s):  
Anonymous
2020 ◽  
Author(s):  
Fabio Brighenti ◽  
Francesco Carnemolla ◽  
Danilo Messina ◽  
Giorgio De Guidi

Abstract. All active geological processes determine effects on the soil due to different deformation processes: surface uplift and subsidence, shear lineaments with differential kinematics in relation to the source and the soils involved. Among all the active geological processes on Santa Barbara mud volcano (Caltanissetta town, Italy), represents a dangerous site because it caused, on 11 August 2008, a paroxysmal event, which determined severe damages to the infrastructures at around to 2 km the paroxysmal event. The remote sensing of surface deformation now represents a key tool for the evaluation and monitoring of the hazard. The use of unmanned aerial vehicles (UAVs) in contexts of natural danger presents three main steps for risk assessment and monitoring: pre-post event data acquisition, emergency support and monitoring. Here we present a methodology for monitoring deformation processes that may be precursors of paroxysmal events on the Santa Barbara mud volcano. Among the precursors, the lifting and development of structural features are the most important, with dimensions ranging from centimetre to decimetre. Therefore in relation to the magnitudes of the phenomena involved, the objective of this work is (going from the acquisition phase, to the SfM processing chain and the use of the M3C2-PM algorithm for the comparison between point clouds and uncertainty analysis with a statistical approach) the monitoring of deformation processes, with centimetre precision and a temporal frequency of 1–2 months, as precursor indications of hazard.


2021 ◽  
Vol 21 (9) ◽  
pp. 2881-2898
Author(s):  
Fabio Brighenti ◽  
Francesco Carnemolla ◽  
Danilo Messina ◽  
Giorgio De Guidi

Abstract. Active geological processes often generate a ground surface response such as uplift, subsidence and faulting/fracturing. Nowadays remote sensing represents a key tool for the evaluation and monitoring of natural hazards. The use of unmanned aerial vehicles (UAVs) in relation to observations of natural hazards encompasses three main stages: pre- and post-event data acquisition, monitoring, and risk assessment. The mud volcano of Santa Barbara (Municipality of Caltanissetta, Italy) represents a dangerous site because on 11 August 2008 a paroxysmal event caused serious damage to infrastructures within a range of about 2 km. The main precursors to mud volcano paroxysmal events are uplift and the development of structural features with dimensions ranging from centimeters to decimeters. Here we present a methodology for monitoring deformation processes that may be precursory to paroxysmal events at the Santa Barbara mud volcano. This methodology is based on (i) the data collection, (ii) the structure from motion (SfM) processing chain and (iii) the M3C2-PM algorithm for the comparison between point clouds and uncertainty analysis with a statistical approach. The objective of this methodology is to detect precursory activity by monitoring deformation processes with centimeter-scale precision and a temporal frequency of 1–2 months.


2021 ◽  
Vol 4 (2) ◽  
pp. 248-262
Author(s):  
Wahyu Eko Widiyanto ◽  
Andi Fepriyanto ◽  
Albi Dwi Prasetyo

The study aimed at exploring the implementation of physical education (PE) teaching during the Covid 19 Pandemic at elementary schools of sub-district of Balung, Jember, Indonesia. This descriptive research which follows the quantitative approach implemented the survey method using one shot case study. The samples participating in the study are 12 SE teachers. In order to gather the data, a questionnaire was distributed to the participants online through Google Form, containing 10 items. The data obtained were analyzed in descriptive quantitative  through percentage. The findings indicate that all participants (100%) conduct the teaching and learning, where 50% of them delivered the teaching in online learning and 58% confirmed that the learning adheres to the lesson plans. Moreover, 67% of the participants informed that the learning materials are in the same order as stated in the lesson plans, 67% used WhatsApp groups as their teaching media, 67% of the participants informed that their students were enthusiastic and participated actively in the class, 50% have cooperated with their students’ parents for supporting learning, 67% of them stated the assessment was based on submitted exams and tasks, 58% stated that the assessment was less effective. Meanwhile, the analysis of learning indicators reveal that generally 41% of the participants claim difficulties in accessing good Internet connection, and 42% of the participants’ students could not afford smartphones for their learning and thus could not submit their tasks. Briefly the Covid 19 pandemic does not hamper the conduct of teaching and learning though it is now delivered online, however, in general the study found that the teaching and learning is less effective; therefore,  more attention needs to be paid to students especially with their obstacles in using the learning media and accessing proper Internet connection.


Agro Ekonomi ◽  
2021 ◽  
Vol 32 (2) ◽  
Author(s):  
Setia Sari Girsang ◽  
Agung B Santosa ◽  
Tommy Purba ◽  
Deddy R Siagian ◽  
Khadijah E Ramija

Accelerating the introduction of a new technological package is needed to increase the productivity of high elevation puddled rice in Humbang Hasundutan. The objectives of the study are to find out the perception of the existence of technological packages and farmers' preference for a new technological package. The study used a survey method with primary data gathered using questionnaires. The criteria of locations and respondents were used to obtain relevant respondents and data concerning their knowledge of high elevation puddled rice cultivation.  The collected data were processed by using Importance Performance Analysis in order to find out the level of Importance and Satisfaction of the indicators and the valued aspects in the technological package components. The results of the study showed that the socio-economic aspects had to be heeded in organizing the technological package. Indicators having a high level of importance and a low level of satisfaction consisted of production cost, quality of seeds, farmer groups empowerment, technology information institution, capital cost, agricultural tools and machines, pest control, sales price, irrigation canals, and farm roads. On the other hand, introducing new superior seeds, productivity attribute and planting age were important indicators for local farmers as to improve the quality of existing seeds. Farmers group expected that the technological package had a high level of productivity, better access to input, low cost, and good user-friendliness in its application.


2021 ◽  
Vol 2 (4) ◽  
pp. 450-460
Author(s):  
Zulkifli Zulkifli ◽  
Anam Ibrahim ◽  
Mangatas Pasaribu ◽  
Bakhrul Khair Amal

Medan City in Indonesia, is rich with iconic forms in the form of historical buildings and cultural products of the past. On the other hand, Medan City tourism has been known since the Dutch colonial era, but has not been supported by the availability of souvenir products. This research article describes the revitalization of the iconic forms of Medan City. The aim is to examine the potential of iconic forms to be used as the basis for the development of relief-dimensional painting as a tourism souvenir product. This research use desciptive qualitative approach. The replicated method is a combination of survey method and creation method. Sources of research data are written data, photo data, interview results, notes on the creation process, and appreciative assessments. Data analysis was carried out using an interactive model: data reduction, data presentation, verification and conclusion drawing. The results showed that the iconic shapes of Medan City have great potential to be explored into original painting themes. Technically, the art of painting with relief dimensions is effectively developed with rubber sheet material, supported by strong texture work. Overall, the paintings produced have an aesthetic quality, exclusive as tourism souvenirs.


2016 ◽  
Vol 15 (2) ◽  
pp. 194
Author(s):  
D Dilahur ◽  
U Umrotun ◽  
P Priyono ◽  
Choirul Amin ◽  
M. Farid Aminudin

This study is carried out in Delanggu, Klaten, that has high productivity of rice but undergoing a decrease in the role of the sector of agriculture. The goal of this study is to observe young people departicipation in the sector od agriculture and fators that influence it. The method used is survey method. The population is all of the young people in Delanggu, 1.419 peoples. The sampling uses stratified proporsional quota sampling where respondents are divided into three groups of age, 15-19 years old, 20-24 years old, and 25-29 years old. Every sampling in eah group is taken 5% proportionally, with its homogenates consideration, while the characteristic, which has determined in order to fulfil the number of determined quota in each age group. Collected data is presented in the form of frequency and cross table. Qualitative data analysis uses logical thought, deducyive-inductive, analogy ang comparison, whereas analyzing frequency and cross table uses quantitative data analysis. The use of both analysis is adjusted to the data and goal of the study.


Author(s):  
Deepa Singh

The concept of work life balance emerged during the Industrial Revolution. In those days Industrialists agreed upon labour union’s demand of ‘One day off’. Later on, this is converted into ‘two day off’ which is followed in all the western countries. Grady et al (2008) stated that the term’ work-life balance’ is more comprehensive and includes “family, community, recreation and personal time.” The objectives of the research are to study the impact of practices followed in Norway and India on work-life balance, to gain insight on Google company’s work-life balance practices, to identify and suggest vital work-life balance practices that can be applied in Indian context. The research is descriptive in nature. The data has been collected mainly from secondary sources – research papers, annual report of companies (employee engagement) and articles. The tools used for achieving objectives and analysing are comparison method, case study analysis and survey method. The comparative and case study analysis shows that the education system, job security, income inequality are some of the factors which hinder the work-life balance in India. Flexi hours, time for creativity, family participation in workplace boost the enthusiasm and morale of the employees. The research is based on secondary sources. The primary data would more effectively convey the problems faced in work life balance. The work-life balance practices followed by only one company is taken into the study due to time constraint. The comparative analysis of work-life balance practices of big films would give better insight and would help in deriving dynamic solution. The sector centred, institution centred or gender centred study will give broader overview of the work-life balance. The search acts a base for comparative analysis.


2016 ◽  
Vol 8 (4) ◽  
pp. 522-539 ◽  
Author(s):  
Mohsen Nazarzadeh Zare ◽  
Javad Pourkarimi ◽  
Gholamreza Zaker Salehi ◽  
Sahba Rezaeian

Purpose The purpose of this paper is to examine faculty members’ views about the assessment of world-class university components in Iran’s comprehensive universities. Design/methodology/approach This study adopted a descriptive methodology by using a survey method. The statistical population consisted of 8,548 faculty members of comprehensive universities all over Iran. Considering the large size of the population, the comprehensive universities were categorized into five clusters (North, South, East, West and Center). The authors selected the faculty members from different clusters using Cochran’s formula. A total of 367 faculty members were selected from five clusters. For data gathering, a researcher-designed questionnaire was used. In data analysis, statistical procedures including the Confirmatory Factor Analysis, Kolmogrov-Smirnov test, one-sample t-test, and Friedman test were performed. Findings The findings of the research showed that except for academic freedom, other components of world-class university in Iran’s comprehensive universities were lower than the mean. Practical implications The case study showed how Iran’s comprehensive universities can become world-class universities. The methods of this case study can also be used in other fields. Originality/value This study adds to the knowledge of a world-class universities. Therefore to reach a desired level in comprehensive universities’ preparation for converting to a world-class university, it is essential that the policy makers and organizers of Iran’s higher education system pay greater attention to items such as research motivation, research innovation, research budget increase, authority reduction on various university departments, internet bandwidth increase and laboratory facilities increase.


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