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1
Jamal, Saleha, and Md Ashif Ali. "Remote Sensing Application for Exploring Land Use and Land Cover Dynamics in and Around Chatra Wetland, English Bazar, West Bengal." Creative Space 9, no. 1 (July 6, 2021): 15–27. http://dx.doi.org/10.15415/cs.2021.91002.
Анотація:
Wetlands are often called as biological “supermarket” and “kidneys of the landscape” due to their multiple functions, including water purification, water storage, processing of carbon and other nutrients, stabilization of shorelines and support of aquatic lives. Unfortunately, although being dynamic and productive ecosystem, these wetlands have been affected by human induced land use changes. India is losing wetlands at the rate of 2 to 3 per cent each year due to over-population, direct deforestation, urban encroachment, over fishing, irrigation and agriculture etc (Prasher, 2018). The present study tries to investigate the nature and degree of land use/land cover transformation, their causes and resultant effects on Chatra Wetland. To fulfil the purpose of the study, GIS and remote sensing techniques have been employed. Satellite imageries have been used from United States Geological Survey (USGS) Landsat 7 Enhanced Thematic Mapper plus and Landsat 8 Operational Land Imager for the year 2003 and 2018. Cloud free imageries of 2003 and 2018 have been downloaded from USGS (https://glovis.usgs.gov/) for the month of March and April respectively. Image processing, supervised classificationhas been done in ArcGis 10.5 and ERDAS IMAGINE 14. The study reveals that the settlement hasincreased by about 90.43 per cent in the last 15 years around the Chatra wetland within the bufferzone of 2 Sq km. Similarly agriculture, vegetation, water body, swamp and wasteland witnessed asignificant decrease by 5.94 per cent, 57.69 per cent, 26.64 per cent 4.52 per cent and 55.27 per centrespectively from 2003 to 2018.
2
Nadel, Jacqueline. "L’autre, milieu mental de nos vies." La Pensée N° 416, no. 4 (December 31, 2023): 58–68. http://dx.doi.org/10.3917/lp.416.0058.
Анотація:
Il y a bientôt cent ans, Wallon a donné une définition révolutionnaire du milieu pour l’humain : le milieu primordial pour lui est le milieu des autres hommes, et non le milieu physique ; et, parmi les circonstances d’interaction rencontrées par l’individu sont incluses ses représentations. Désormais il est évident de contextualiser l’étude des comportements. Désormais les rapports découverts par la neuro-imagerie entre imitation, simulation et représentations motrices partagées apparaissent comme les supports de la théorie de l’esprit, notre capacité à inférer les intentions d’autrui à partir d’inobservables. De ce fait Wallon nous offre une synthèse très actuelle de ce qui crée l’environnement mental de nos vies.
3
Moulin, Joanny. "Creole Baroque in Derek Walcott’s Archipelagic Imagery." Commonwealth Essays and Studies 28, no. 2 (April 1, 2006): 73–79. http://dx.doi.org/10.4000/ces.10239.
4
Omhovère, Claire. "Incorporating Otherness: Food Imagery in Anita Desai’s In Custody." Commonwealth Essays and Studies 31, no. 2 (April 1, 2009): 107–15. http://dx.doi.org/10.4000/ces.8924.
5
RANA, RANBIR SINGH, VAIBHAV KALIA, R. M. BHAGAT, and SHARDA SINGH. "Extreme snowfall event analysis and its impacts on agriculture and horticultural crops in western Himalaya, India." MAUSAM 68, no. 3 (December 2, 2021): 543–50. http://dx.doi.org/10.54302/mausam.v68i3.709.
Анотація:
Glaciers and snow are the important features of hydrological cycle and affect volume, variability and water quality in areas where these occur. Snow supplies more than half of water used for irrigation in Himachal Pradesh and other northern states of India and is an important contributor to hydropower and irrigation reservoirs. The fact that snow acts as water storage over the winter and provides soil moisture recharge in the spring is of particular importance to agriculture productivity in mountainous regions. The study on snowfall estimation during 2004-05 in Himachal Pradesh was carried out using remote sensing techniques and ground truth data to estimate total snowfall and assess the impact of snow fall on water availability and crop productivity. The snowfall estimates using remote sensing techniques for two periods by using two sets of imageries before snow fall (October, 2004) and after snowfall (May 2005). This indicated an increase of 28.7 per cent in snow cover compared to pre snowfall period. The ground data from 22 sites also indicated an increase of more than 50 per cent higher amount of snowfall during 2004-05 compared to last two decades. The area under different crops during rabi 2004 was found to be increased by 8.57 per cent, whereas, subsequent kharif season registered 1.85 per cent reduction in cropped area. The increase also reflected in higher productivity during rabi season 2004 and kharif 2005. The productivity of total food grains increased by more than 19.0 per cent during 2004-05 compared to 2003-04. The apple and other fruits registered 12.1 and 59.8 per cent higher productivity, respectively in 2004-05 compared to 2002-03 and 2003-04. The impact of extreme snow fall was more pronounced in short duration vegetables crops. The total vegetables arrivals in the market increased by 48.33 per cent during 2004-05 compared to last three year arrivals. This indicated that there was a positive and significant effect of heavy snowfall on agricultural as well as horticultural crop productivity in the mountains and downstream of Himachal Pradesh.
6
Mundhe, Nitin. "Multi-Criteria Decision Making for Vulnerability Mapping of Flood Hazard: A Case Study of Pune City." Journal of Geographical Studies 2, no. 1 (March 13, 2019): 41–52. http://dx.doi.org/10.21523/gcj5.18020105.
Анотація:
Floods are natural risk with a very high frequency, which causes to environmental, social, economic and human losses. The floods in the town happen mainly due to human made activities about the blockage of natural drainage, haphazard construction of roads, building, and high rainfall intensity. Detailed maps showing flood vulnerability areas are helpful in management of flood hazards. Therefore, present research focused on identifying flood vulnerability zones in the Pune City using multi-criteria decision-making approach in Geographical Information System (GIS) and inputs from remotely sensed imageries. Other input data considered for preparing base maps are census details, City maps, and fieldworks. The Pune City classified in to four flood vulnerability classes essential for flood risk management. About 5 per cent area shows high vulnerability for floods in localities namely Wakdewadi, some part of the Shivajinagar, Sangamwadi, Aundh, and Baner with high risk.
7
Saayman, Sandra. "The Resurgence of Prison Imagery in Breyten Breytenbach’s A Veil of Footsteps." Commonwealth Essays and Studies 31, no. 1 (September 1, 2008): 69–79. http://dx.doi.org/10.4000/ces.9027.
8
Pazhanivelan, S., P. Kannan, P. Christy Nirmala Mary, E. Subramanian, S. Jeyaraman, A. Nelson, T. Setiyono, F. Holecz, M. Barbieri, and M. Yadav. "Rice Crop Monitoring and Yield Estimation Through Cosmo Skymed and TerraSAR-X: A SAR-Based Experience in India." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-7/W3 (April 28, 2015): 85–92. http://dx.doi.org/10.5194/isprsarchives-xl-7-w3-85-2015.
Анотація:
Rice is the most important cereal crop governing food security in Asia. Reliable and regular information on the area under rice production is the basis of policy decisions related to imports, exports and prices which directly affect food security. Recent and planned launches of SAR sensors coupled with automated processing can provide sustainable solutions to the challenges on mapping and monitoring rice systems. High resolution (3m) Synthetic Aperture Radar (SAR) imageries were used to map and monitor rice growing areas in selected three sites in TamilNadu, India to determine rice cropping extent, track rice growth and estimate yields. A simple, robust, rule-based classification for mapping rice area with multi-temporal, X-band, HH polarized SAR imagery from COSMO Skymed and TerraSAR X and site specific parameters were used. The robustness of the approach is demonstrated on a very large dataset involving 30 images across 3 footprints obtained during 2013-14. A total of 318 in-season site visits were conducted across 60 monitoring locations for rice classification and 432 field observations were made for accuracy assessment. Rice area and Start of Season (SoS) maps were generated with classification accuracies ranging from 87- 92 per cent. Using ORYZA2000, a weather driven process based crop growth simulation model; yield estimates were made with the inclusion of rice crop parameters derived from the remote sensing products viz., seasonal rice area, SoS and backscatter time series. Yield Simulation accuracy levels of 87 per cent at district level and 85- 96 per cent at block level demonstrated the suitability of remote sensing products for policy decisions ensuring food security and reducing vulnerability of farmers in India.
9
Lovett, Jon C., and Erik Prins. "Estimation of land-use changes on Kitulo Plateau, Tanzania, using satellite imagery." Oryx 28, no. 3 (July 1994): 173–82. http://dx.doi.org/10.1017/s0030605300028532.
Анотація:
The Kitulo Plateau of southern Tanzania is a lava plateau covering 273 sq km at an altitude of over 2500 m. The vegetation is predominately grassland with more than 350 taxa of vascular plants, of which nearly 5 per cent are of restricted distribution. Although the plateau is extensive, much of it is now cultivated. Digital analysis of satellite images showed that at least 24 per cent of the plateau was bare soil, modified grassland or cultivation between 1973 and 1989. The botanical importance of the plateau and increase in cultivation make a strong case for the establishment of a nature reserve to protect its rare and threatened plants.
10
Parker, John K., Martin I. Jones, and Geoff P. Lovell. "Involuntary imagery predicts athletes’ affective states." Sport & Exercise Psychology Review 13, no. 2 (September 2017): 22–31. http://dx.doi.org/10.53841/bpssepr.2017.13.2.22.
Анотація:
Involuntary imagery has received scant attention in the sport psychology literature, with most investigations concentrating on deliberate imagery use. This is surprising considering research has demonstrated that specific types of involuntary imagery exists and can elicit both facilitative and negative effects upon psychological and affective states. Therefore our study examined athletes’ involuntary imagery types (intrusive-spontaneous) and the subsequent relationship with recorded state levels of positive and negative affect. Hierarchical regression analysis demonstrated that intrusive visual imagery accounted for 6.3 per cent of the variance in participants’ negative affect scores with no further contribution to the models result observed with the introduction of spontaneous imagery. The second regression recorded that these involuntary visual imagery types contribute minimally to an athlete’s positive affect in a noncompetitive environment. In conclusion, these findings provide evidence that practitioners should be vigilant of athletes experiencing involuntary visual imagery, as some images are likely to be accompanied with negative affect.
11
Voerman, M. S., A. P. M. Langeveld, and M. A. van Rossum. "Retrospective study of 116 patients with non-organic voice disorders: efficacy of mental imagery and laryngeal shaking." Journal of Laryngology & Otology 123, no. 5 (September 2, 2008): 528–34. http://dx.doi.org/10.1017/s0022215108003484.
Анотація:
AbstractObjective:To report the short- and long-term results of two techniques (mental imagery and manual shaking of the larynx) in patients with non-organic dysphonia or aphonia.Design:Retrospective review of patient records, plus follow-up survey (questionnaire).Setting:Academic teaching hospital.Patients:One hundred and sixteen patients with moderate to severe non-organic dysphonia or aphonia.Outcome:Cure (i.e. normal voice) and improved voice quality, judged by clinicians and patients.Results:One hundred (86 per cent) of the 116 patients were cured. Ninety-four (81 per cent) patients regained their normal voice within one therapy session. The follow-up survey revealed that 43 of the 87 (49 per cent) patients who responded had not had a relapse since therapy ended. Of those patients suffering relapse, 15 successfully applied mental imagery in order to retrieve their voice, compared with three patients who applied shaking of the larynx.Conclusion:Mental imagery, combined if necessary with manual therapy, is an effective therapeutic technique in patients with non-organic voice disorders.
12
GARNIER, C., B. BASTIAN, H. COLINEAUX, JB CATHELAIN, M. ESVAN, A. CHAPRON, PE BIGOTTE, and P. LE DOUARON. "DYSTHIROIDIE EN FRANCE : EVALUATION DES PRATIQUES DIAGNOSTIQUES DES MEDECINS GENERALISTES." EXERCER 35, no. 204 (June 1, 2024): 260–67. http://dx.doi.org/10.56746/exercer.2024.204.260.
Анотація:
Contexte. La Haute Autorité de santé a émis, en septembre 2021, des recommandations précisant les indications et non-indications de l’échographie thyroïdienne en cas de dysthyroïdie, afin d’améliorer la pertinence des soins, de réduire les dépenses et de favoriser la qualité du parcours de soins. Les pratiques des professionnels de soins primaires concernant les dysthyroïdies sont méconnues. Objectif. Évaluer les pratiques des professionnels à visée diagnostique (palpation et échographies thyroïdiennes) face à différentes situations clinico-biologiques de dysthyroïdies. Explorer les déterminants à la prescription d’échographies dans ces situations. Méthode. Étude descriptive transversale par questionnaire en ligne diffusé aux médecins généralistes de France métropolitaine par les conseils de l’Ordre et unions régionales des professionnels de santé. Comparaison aux recommandations des pratiques déclarées face à cinq situations cliniques fréquentes de dysthyroïdie. Résultats. Sur 506 médecins inclus, 453 (89,5 %) prescrivaient hors recommandation une échographie en cas de maladie de Basedow, 439 (86,8 %) en cas de thyroïdite d’Hashimoto. Plus de 90 % des répondants déclaraient palper la thyroïde pour chacune des situations, geste que 438 (86,6 %) trouvaient difficile. Cent cinquante (34,2 %) médecins déclaraient prescrire une échographie car ils doutaient de leur palpation thyroïdienne dans la thyroïdite d’Hashimoto. Les médecins déclarant être à l’aise avec la palpation prescrivaient en moyenne autant d’échographies que ceux qui n’étaient pas à l’aise (p = 0,26). Conclusion. Cette étude a permis pour la première fois une évaluation des pratiques professionnelles des médecins généralistes français dans la dysthyroïdie. Ces derniers semblent avoir des attitudes de prescription d’échographie non conformes aux recommandations, ce qui pourrait occasionner des surdiagnostics, coûteux et iatrogènes. La palpation thyroïdienne ne semble pas être un critère pertinent pour la réalisation d’une imagerie.
13
Tielidze, Levan G., David Svanadze, Lela Gadrani, Lasha Asanidze, Roger D. Wheate, and Gordon S. Hamilton. "A 54-year record of changes at Chalaati and Zopkhito glaciers, Georgian Caucasus, observed from archival maps, satellite imagery, drone survey and ground-based investigation." Hungarian Geographical Bulletin 69, no. 2 (June 30, 2020): 175–89. http://dx.doi.org/10.15201/hungeobull.69.2.6.
Анотація:
Individual glacier changes are still poorly documented in the Georgian Caucasus. In this paper, the change of Chalaati and Zopkhito glaciers in Georgian Caucasus has been studied between 1960 and 2014. Glacier geometries are reconstructed from archival topographic maps, Corona and Landsat images, along with modern field surveys. For the first time in the Georgian Caucasus aerial photogrammetric survey of both glacier termini was performed (2014) using a drone or Unmanned Aerial Vehicle, where high-resolution orthomosaics and digital elevation models were produced. We show that both glaciers have experienced area loss since 1960: 16.2±4.9 per cent for Chalaati Glacier and 14.6±5.1 per cent for Zopkhito Glacier with corresponding respective terminus retreat by ~675 m and ~720 m. These were accompanied by a rise in the equilibrium line altitudes of ~35 m and ~30 m, respectively. The glacier changes are a response to regional warming in surface air temperature over the last half century. We used a long-term temperature record from the town of Mestia and short-term meteorological observations at Chalaati and Zopkhito glaciers to estimate a longer-term air temperature record for both glaciers. This analysis suggests an increase in the duration of the melt season over the 54-year period, indicating the importance of summertime air temperature trends in controlling glacier loss in the Georgian Caucasus. We also observed supra-glacial debris cover increase for both glaciers over the last half century: from 6.16±6.9 per cent to 8.01±6.8 per cent for Chalaati Glacier and from 2.80±6.3 per cent to 8.53±5.7 per cent for Zopkhito Glacier.
14
Jain, Ajay, Amit Sharma, SL Borana, Brahmmajyosula Ravindra, and JP Mangalhara. "Study and Analysis of Exhaust Emission of Diesel Vehicles using Thermal IR Imagers." Defence Science Journal 68, no. 6 (October 31, 2018): 533. http://dx.doi.org/10.14429/dsj.68.12701.
Анотація:
<p>Exhaust emission analysis from diesel vehicles has received a lot of attention in recent times in the context of implementation of Bharat Stage-IV norms and thermal signature analysis for civil and military applications. The exhaust emission thermal IR signatures of military diesel vehicles such as truck and bus using a gas analyser and thermal imager under idling and accelerating conditions of these vehicles is investigated. Concentration and temperature of diesel exhaust emission CO, NOx, and HC remains almost constant during engine running in idle condition and varies with the engine acceleration. Exhaust gases maximum temperature reaches in the range of 240 °C - 270 °C during engine acceleration. A detailed investigation of thermal signature in mid wave infrared, 3 µm - 5 µm waveband and long wave infrared, 8 µm - 14 µm waveband is also presented under the same engine running conditions. Thermal image analysis exhibited that the area of thermal IR image of diesel vehicles truck and bus has been increased 0.077 per cent and 0.594 per cent, respectively with the engine acceleration. It has been observed that thermal signature of exhaust gases is a good tool for vehicle exhaust emission visualisation and analysis.</p>
15
Metzler, J. W., and S. A. Sader. "Model development and comparison to predict softwood and hardwood per cent cover using high and medium spatial resolution imagery." International Journal of Remote Sensing 26, no. 17 (September 10, 2005): 3749–61. http://dx.doi.org/10.1080/01431160500104152.
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Gadisseux, B., T. Amouyel, C. Szymanski, and C. Maynou. "Tumeurs à cellules géantes ténosynoviales de la cheville et du pied. Étude rétrospective à propos de 28 cas." Médecine et Chirurgie du Pied 36, no. 4 (December 2020): 93–100. http://dx.doi.org/10.3166/mcp-2021-0060.
Анотація:
Introduction : Les tumeurs à cellules géantes ténosynoviales (TCGTS) sont des tumeurs bénignes d’origine synoviale, de formes localisées ou diffuses, en situation extra- ou intra-articulaire. Les localisations à la cheville et au pied sont rares, et les séries publient un nombre de cas limité. L’objectif de notre étude était d’évaluer les résultats fonctionnels et le taux de récidive des TCGTS en fonction du type lésionnel et de la qualité de l’exérèse chirurgicale. Matériels et méthodes : L’étude porte sur 28 patients : 13 formes localisées et 15 diffuses. Tous les patients bénéficiaient d’une imagerie préopératoire IRM, échographique ou tomodensitométrique. Les résultats fonctionnels étaient évalués à l’aide des scores TESS et AOFAS. Une IRM de contrôle dépistait et quantifiait une éventuelle récidive lésionnelle. Résultats : L’âge moyen des patients était de 42 ans avec une prédominance féminine. Cinquante pour cent des lésions siégeaient à la cheville, 18 % au médiopied et 32 % à l’avantpied. Une résection chirurgicale était réalisée chez 25 patients (90 %). Vingt-trois patients (82 %) ont été revus au recul moyen de 64 mois, le score TESS était en moyenne de 84,2 et le score AOFAS de 78,2. Les meilleurs résultats étaient observés dans les formes localisées. Le taux de récidive était de 28 % (7 patients) à 29 mois en moyenne. Les récidives étaient plus fréquentes dans les formes extraarticulaires (36 %). La récidive altérait les résultats de façon plus significative dans les formes diffuses. Discussion : La résection chirurgicale complète reste le traitement de choix des TCGTS. Nos résultats fonctionnels sont satisfaisants et superposables à ceux de la littérature. Toutefois, un taux de récidive important des formes localisées nous fait privilégier une synovectomie plus large dans les formes extra-articulaires. Les thérapies ciblées pourraient voir leurs indications étendues afin de limiter les récidives des résections incomplètes.
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Galli, Marco. "Hellenistic Court Imagery in the Early Buddhist Art of Gandhara." Ancient Civilizations from Scythia to Siberia 17, no. 2 (2011): 279–329. http://dx.doi.org/10.1163/157005711x595158.
Анотація:
Abstract The focus of the paper is on the relationship between Gandharan artistic culture and the presence of a Hellenistic court milieu during the 1st cent. before and after CE in the territories of Ancient Uḍḍīyāna. What emerges from new literary and archaeological evidences are significant interactions between artistic production and the evergetism made by the princes of Apraca and Oḍi: many evidences demonstrate the substantial involvement as donors of these local dynasties in the construction of the sacred landscape. What influence did these local dynasties have in the structuring of religious communication? How was this local power and his Hellenistic background reflected in the images and complex decorative Buddhist monuments? In order to understand the dynamics between power and religious communication in the sacred space of Early Gandharan society not only some well-known iconographic themes are now interpreted as self-representations of an aristocratic habitus, but also the presence of a ‘beholder in the image’ is detected as powerful visual strategy to stage the religious experience as a suggestive ritual performance.
18
Prajesh, P. J., Balaji Kannan, S. Pazhanivelan, and K. P. Ragunath. "Monitoring and mapping of seasonal vegetation trend in Tamil Nadu using NDVI and NDWI imagery." Journal of Applied and Natural Science 11, no. 1 (February 20, 2019): 54–61. http://dx.doi.org/10.31018/jans.v11i1.1964.
Анотація:
In order to monitor vegetation growth and development over the districts and land covers of Tamil Nadu, India during the crop growing season viz., Khairf and Rabi of 2017, Moderate Resolution Imaging Spectroradiometer (MODIS) derived surface reflectance product (MOD09A1) which is available at 500 m resolution and 8-day temporal period was used to derive a time series based Normalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI) for monitoring and mapping terrestrial vegetation trend analysis which showed areas in Tamil Nadu having vegetation greening and vegetation browning. The regression slope values derived from the trend analysis was utilized and the NDVI and NDWI seasonal trend showed majority of area in Tamil Nadu falling under positive trend during the Kharif season (86.52 per cent for NDVI and 90.29 per cent for NDWI). While irrespective of land cover classes, NDVI and NDWI during Kharif season showed a greater positive trend (greening) with least negative trend (browning) for vegetation growth over the land covers whereas during Rabi season it was observed to have a mix of positive trend and negative trend over the land covers. This study was carried out to show that a systematic study can be done for understanding changes over the landscape through the use of high spatial resolution satellite dataset such as MODIS, which provides detailed spatial and temporal description at regional scale. While a trend analysis using regression slope values can be considered for demonstrating the spatial and temporal consistency on land and vegetation dynamics.
19
Prasad, Vishnu, and Anil Bhardwaj. "Temporal Land Use Change Analysis of Saleran Dam Catchment in Shivalik Foot-hills of Punjab using Geospatial Techniques." Journal of Agricultural Engineering 58, no. 02 (June 30, 2021): 167–76. http://dx.doi.org/10.52151/jae2021581.1743.
Анотація:
Mapping and monitoring of land use change in Shivalik foot-hills of north-west India is important for development, planning, and management of various catchments situated in this region. The present study was thus undertaken to monitor changes in land use of Saleran dam catchment located in Shivalik foot-hills of Punjab for the periods of 1999- 2009, 2009-2019, and 1999-2019 using remote sensing and GIS. The satellite imageries from Landsat-5 and Landsat-8 were used for change analysis. The supervised classification technique with maximum likelihood algorithm was applied to prepare land use maps of the catchment. Four major land use classes viz. mixed forest, degraded land, streams, and water bodies were identified. The accuracy of classified maps was assessed using high-resolution Google earth images, and ground realities were verified and determined through field observations. The results obtained from the accuracy assessment of classified images indicated the overall accuracy of 93.65%, 92.06%, and 92.86% with corresponding kappa values of 0.85, 0.89, and 0.84 for the classified image of the years 1999, 2009 and 2019, respectively. The results demonstrated significant changes in the catchment land use during the period of past 20 years (1999-2019), indicating significant decrease in mixed forests from 552.07 ha (74.87%) to 483.17 ha (65.53%), whereas an increase in degraded land from 142.39 ha (19.31%) to 221.1 ha (29.99%) was observed. The area under water bodies and mixed forest decreased by 36.49% and 12.48%, respectively, while the area under streams increased by 14.01 per cent. The study highlights the important policy implications for the sustainable land use management in the Saleran dam catchment of Shivalik foot-hills.
20
Forbes, Duncan A., Anna Ferré-Mateu, Mark Durré, Jean P. Brodie, and Aaron J. Romanowsky. "Keck Cosmic Web Imager (KCWI) spectra of globular clusters and ultracompact dwarfs in the halo of M87." Monthly Notices of the Royal Astronomical Society 497, no. 1 (July 7, 2020): 765–75. http://dx.doi.org/10.1093/mnras/staa1924.
Анотація:
ABSTRACT Using the Keck Cosmic Web Imager, we obtain spectra of several globular clusters (GCs), ultracompact dwarfs (UCDs), and the inner halo starlight of M87, at a similar projected galactocentric radius of ∼5 kpc. This enables us, for the first time, to apply the same stellar population analysis to the GCs, UCDs, and starlight consistently to derive ages, metallicities, and alpha-element abundances in M87. We find evidence for a dual stellar population in the M87 halo light, i.e. an ∼80 per cent component by mass that is old and metal-rich and a ∼20 per cent component that is old but metal-poor. Two red GCs share similar stellar populations to the halo light suggesting they may have formed contemporaneously with the dominant halo component. Three UCDs, and one blue GC, have similar stellar populations, with younger mean ages, lower metallicities, and near solar alpha-element abundances. Combined with literature data, our findings are consistent with the scenario that UCDs are the remnant nucleus of a stripped galaxy. We further investigate the discrepancy in the literature for M87’s kinematics at large radii, favouring a declining velocity dispersion profile. This work has highlighted the need for more self-consistent studies of galaxy haloes.
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Escolano-Poveda, Marina. "Zosimos Aigyptiakos. Identifying the Imagery of the “Visions” and Locating Zosimos of Panopolis in His Egyptian Context." ARYS. Antigüedad: Religiones y Sociedades, no. 20 (October 7, 2022): 77–134. http://dx.doi.org/10.20318/arys.2022.6793.
Анотація:
The first alchemist for whom we have biographical data, Zosimos, lived in the Panopolis (current Akhmim) of the late 3rd – early 4th cent. CE, a region in which evidence of the practice of traditional Egyptian religion is attested well into Late Antiquity. The images that Zosimos employed in his presentation of alchemical procedures and apparatus offer us an insight into his cultural context. This paper will examine a series of passages from the works of Zosimos of Panopolis from an Egyptological perspective, contrasting them with textual and iconographic sources from the Egyptian temple milieu of Graeco-Roman Egypt. The results of this inquiry will be used to elaborate a more nuanced presentation of Zosimos’ identity.
22
Fu, Xiaofeng, Guoting Wei, Xia Yuan, Yongshun Liang, and Yuming Bo. "Efficient YOLOv7-Drone: An Enhanced Object Detection Approach for Drone Aerial Imagery." Drones 7, no. 10 (October 1, 2023): 616. http://dx.doi.org/10.3390/drones7100616.
Анотація:
In recent years, the rise of low-cost mini rotary-wing drone technology across diverse sectors has emphasized the crucial role of object detection within drone aerial imagery. Low-cost mini rotary-wing drones come with intrinsic limitations, especially in computational power. Drones come with intrinsic limitations, especially in resource availability. This context underscores an urgent need for solutions that synergize low latency, high precision, and computational efficiency. Previous methodologies have primarily depended on high-resolution images, leading to considerable computational burdens. To enhance the efficiency and accuracy of object detection in drone aerial images, and building on the YOLOv7, we propose the Efficient YOLOv7-Drone. Recognizing the common presence of small objects in aerial imagery, we eliminated the less efficient P5 detection head and incorporated the P2 detection head for increased precision in small object detection. To ensure efficient feature relay from the Backbone to the Neck, channels within the CBS module were optimized. To focus the model more on the foreground and reduce redundant computations, the TGM-CESC module was introduced, achieving the generation of pixel-level constrained sparse convolution masks. Furthermore, to mitigate potential data losses from sparse convolution, we embedded the head context-enhanced method (HCEM). Comprehensive evaluation using the VisDrone and UAVDT datasets demonstrated our model’s efficacy and practical applicability. The Efficient Yolov7-Drone achieved state-of-the-art scores while ensuring real-time detection performance.
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Reyes-Palomeque, Gabriela, Juan Manuel Dupuy, Kristofer D. Johnson, Miguel Angel Castillo-Santiago, and J. Luis Hernández-Stefanoni. "Combining LiDAR data and airborne imagery of very high resolution to improve aboveground biomass estimates in tropical dry forests." Forestry: An International Journal of Forest Research 92, no. 5 (June 14, 2019): 599–615. http://dx.doi.org/10.1093/forestry/cpz037.
Анотація:
Abstract Knowledge of the spatial distribution of aboveground biomass (AGB) is crucial to guide forest conservation and management to maintain carbon stocks. LiDAR has been highly successful for this purpose, but has limited availability. Very-high resolution (<1 m) orthophotos can also be used to estimate AGB because they allow a fine distinction of forest canopy grain. We evaluated the separate and joint performance of orthophotos and LiDAR data to estimate AGB in two types of tropical dry forests in the Yucatan Peninsula. Woody plants were surveyed in twenty 0.1 ha plots in a semideciduous forest at Kaxil Kiuic Biocultural Reserve (RBKK) and 28 plots in a semievergreen forest at Felipe Carrillo Puerto (FCP). We fitted three regression models: one based on LiDAR data, another based on orthophoto variables calculated for forest canopy and canopy opening fractions, and a third model that combined both sets of variables. Variation in AGB was decomposed into LiDAR, orthophotos and joint components using variation-partitioning analyses. In FCP, regression models using LiDAR data only showed higher fit (R2 = 0.82) than orthophoto variables only (R2 = 0.70). In contrast, orthophotos had a slightly higher fit (R2 = 0.91) than LiDAR (R2 = 0.88) in RBKK, because orthophoto variables characterize very well the horizontal structure of canopies on this site. The model that combined both data sets showed a better fit (R2 = 0.85) only in FCP, which has a more complex forest structure. The largest percentage of AGB variation (88 per cent in RBKK and 67 per cent in FCP) was explained by the joint contribution of LiDAR and orthophotos. We conclude that both LiDAR and orthophotos provide accurate estimation of AGB, but their relative performance varies with forest type and structural complexity. Combining the two sets of variables can further improve the accuracy of AGB estimation, particularly in forests with complex vegetation structure.
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Zhao, Zhenzhen, Aiwen Lin, Qin Yan, and Jiandi Feng. "Change detection in very high resolution imagery and vector data applied to the monitoring of geographical conditions." Sensor Review 36, no. 4 (September 19, 2016): 347–58. http://dx.doi.org/10.1108/sr-02-2016-0051.
Анотація:
Purpose Geographical conditions monitoring (GCM) has elicited significant concerns from the Chinese Government and is closely related to the “Digital China” program. This research aims to focus on object-based change detection (OBCD) methods integrating very-high-resolution (VHR) imagery and vector data for GCM. Design/methodology/approach The main content of this paper is as follows: a multi-resolution segmentation (MRS) algorithm is proposed for obtaining homogeneous and contiguous image objects in two phases; a post-classification comparison (PCC) method based on the nearest neighbor algorithm and an image-object analysis (IOA) technique based on a differential entropy algorithm are used to improve the accuracy of the change detection; and a vector object-based accuracy assessment method is proposed. Findings Results show that image objects obtained using the MRS algorithm attain the objectives of the “same spectrum within classes” and “different spectrum among classes”. Moreover, the two OBCD methods can detect over 85 per cent of the changed regions. The PCC strategy can obtain the categories of image objects with a high degree of precision. The IOA technique is easy to use and largely automated. Originality/value On the basis of the VHR satellite imagery and vector data, the above methods can effectively and accurately provide technical support for GCM implementation.
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Zhao, Zhenzhen, and Jiandi Feng. "Spatio-temporal analysis of land use changes using remote sensing in Horqin sandy land, China." Sensor Review 39, no. 6 (November 18, 2019): 844–56. http://dx.doi.org/10.1108/sr-04-2019-0089.
Анотація:
Purpose The purpose of this paper is to analyze the characteristics of spatio-temporal dynamics and the evolution of land use change is essential for understanding and assessing the status and transition of ecosystems. Such analysis, when applied to Horqin sandy land, can also provide basic information for appropriate decision-making. Design/methodology/approach By integrating long time series Landsat imageries and geographic information system (GIS) technology, this paper explored the spatio-temporal dynamics and evolution-induced land use change of the largest sandy land in China from 1983 to 2016. Accurate and consistent land use information and land use change information was first extracted by using the maximum likelihood classifier and the post-classification change detection method, respectively. The spatio-temporal dynamics and evolution were then analyzed using three kinds of index models: the dynamic degree model to analyze the change of regional land resources, the dynamic change transfer matrix and flow direction rate to analyze the change direction, and the barycenter transfer model to analyze the spatial pattern of land use change. Findings The results indicated that land use in Horqin sandy land during the study period changed dramatically. Vegetation and sandy land showed fluctuating changes, cropland and construction land steadily increased, water body decreased continuously, and the spatial distribution patterns of land use were generally unbalanced. Vegetation, sandy land and cropland were transferred frequently. The amount of vegetation loss was the largest. Water body loss was 473.6 km2, which accounted for 41.7 per cent of the total water body. The loss amount of construction land was only 1.0 km2. Considerable differences were noted in the rate of gravity center migration among the land use types in different periods, and the overall rate of construction land migration was the smallest. Moreover, the gravity center migration rates of the water body and sandy land were relatively high and were related to the fragile ecological environment of Horqin sandy land. Originality/value The results not only confirmed the applicability and effectiveness of the combined method of remote sensing and GIS technology but also revealed notable spatio-temporal dynamics and evolution-induced land use change throughout the different time periods (1983-1990, 1990-2000, 2000-2010, 2010-2014, 2014-2016 and 1983-2016).
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Kemper, T., N. Mudau, P. Mangara, and M. Pesaresi. "Towards an automated monitoring of human settlements in South Africa using high resolution SPOT satellite imagery." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-7/W3 (April 30, 2015): 1389–94. http://dx.doi.org/10.5194/isprsarchives-xl-7-w3-1389-2015.
Анотація:
Urban areas in sub-Saharan Africa are growing at an unprecedented pace. Much of this growth is taking place in informal settlements. In South Africa more than 10% of the population live in urban informal settlements. South Africa has established a National Informal Settlement Development Programme (NUSP) to respond to these challenges. This programme is designed to support the National Department of Human Settlement (NDHS) in its implementation of the Upgrading Informal Settlements Programme (UISP) with the objective of eventually upgrading all informal settlements in the country. Currently, the NDHS does not have access to an updated national dataset captured at the same scale using source data that can be used to understand the status of informal settlements in the country. <br><br> This pilot study is developing a fully automated workflow for the wall-to-wall processing of SPOT-5 satellite imagery of South Africa. The workflow includes an automatic image information extraction based on multiscale textural and morphological image features extraction. The advanced image feature compression and optimization together with innovative learning and classification techniques allow a processing of the SPOT-5 images using the Landsat-based National Land Cover (NLC) of South Africa from the year 2000 as low-resolution thematic reference layers as. The workflow was tested on 42 SPOT scenes based on a stratified sampling. The derived building information was validated against a visually interpreted building point data set and produced an accuracy of 97 per cent. Given this positive result, is planned to process the most recent wall-to-wall coverage as well as the archived imagery available since 2007 in the near future.
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Nadaf, F. M., and Venkatesh G. Prabhu Gaonkar. "Analysis and Prediction of Land Cover Changes using the Land Change Modeler (LCM): A Case Study of Candolim, Bardez-Goa, India." Disaster Advances 15, no. 8 (July 25, 2022): 19–28. http://dx.doi.org/10.25303/1508da019028.
Анотація:
Earth is changing ever since it is born. Once entire earth was covered by molten material which later took the shape of the lithosphere. The primordial lithosphere had only land and water as land cover and later other land covers such as forests, grasslands, wetlands etc. took shape. With the humanization of the Earth, the landscape was used for development and conservation resulting in land use. Land is a fixed resource and every accessible piece of land has been utilized by man for his needs. The land use continues to change, today’s built-up area may have been agricultural land a decade ago or today’s plantation might have been forest. Detection of changes in the use of land will offer policymakers and planners to predict the future land cover and will help in the proper planning and management of towns and cities. Globally, the tour and travel industry has played an important role in bringing drastic changes in land use. Tourism leaves both constructive and destructive imprints on the environment. Of late, ‘beach tourism’ has fascinated a large number of travellers in the world. In Goa, tourism arrived immediately after its liberation in 1961 from the oppressive rule of the Portuguese with the appearance of 'Hippies' in Calangute, Anjuna, Vagator, Baga and Candolim villages of Bardez taluka. Tourism has played a vital role in the overall economic development of these villages and has led to change in the character of these villages. Hence, this study makes an in-depth analysis of the impact of tourism on the land use land cover in Candolim village of Bardez Taluka. The spatio-temporal analysis of land cover change is undertaken using Image Processing software Idrisi Selva 17.0 and ArcGIS 10.3. Landsat multitemporal satellite imageries of the year 2001 and 2021 and Google Earth data of the same period are used to define the current changes in the land use land cover patterns. ArcScene was used for 3D creation and modelling of Candolim village between the years 2001 and 2021. The study indicates that due to unplanned tourism growth, six land parcels such as the area under forestland, sandy beaches, barren land, agricultural land, plantations and shrub land have declined by 0.94, 2.33, 3.42, 1.52, 0.23 and 6.83 per cent respectively. Net change to Built-up land from different classes and cubic trend map of 2001 to 2021 depicts that shrub Land was more vulnerable to change into built-up land at a large scale.
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Nzima Brice, Kollo, BambaAboubakar Aboubakar, Dangui Eric, Diomandé Mohamed, Eti Edmond, Koffi Joseph Enoch, Kouakou Ehaulier Christian Louis, Ngon Nzima Hilary Brenda, and Ada Kanbaye Medom Hadia. "Formes topographiques des arthroses des membres en consultation rhumatologique à Abidjan." European Scientific Journal, ESJ 20, no. 18 (June 30, 2024): 112. http://dx.doi.org/10.19044/esj.2024.v20n18p112.
Анотація:
Objectif: Déterminer les formes topographiques des arthroses des membres en rhumatologie à Abidjan. Méthodologie: Etude transversale réalisée dans le service de rhumatologie du CHU de Cocody à Abidjan (Côte d’Ivoire) sur une période allant du 1er Février au 10 Mai 2023. Les patients venus en consultation de rhumatologie présentant des arthralgies mécaniques des membres et disposant des imageries ont été inclus. Le diagnostic était posé par le médecin sur la base des arguments cliniques et paracliniques. Les critères de Kellgren et Lawrence avaient permis la classification des stades radiologiques de l’arthrose des membres. Nous nous sommes intéressés aux données sociodémographiques, cliniques et paracliniques. Résultats: Deux cent quatre-vingt-six patients ont été recensés pendant la période d’étude. L’âge moyen était de 55 ans ± 11 ans et le sex ratio de 0,42. La principale catégorie socio-professionnelle était le secteur informel (34,96%). La majorité des patients avait un niveau socio-économique bas (80,2%) et vivait en milieu urbain (92,06%). Les antécédents les plus retrouvés étaient l’hypertension (33,21%) et l’ulcère gastro-duodénal (17,13%). Les patients étaient obèses à 68,18%. La durée moyenne d’évolution des symptômes jusqu’au diagnostic était de 11 mois. On retrouvait 185 localisations d’arthrose aux membres inférieurs (64,68%) et de 101 localisations aux membres supérieurs (35,31%). Les formes topographiques observées aux membres inférieurs incluaient : gonarthrose 163 (88,10%) ; coxarthrose 14 (7,56%); arthrose de la cheville 7 (3,78%), arthrose du mediopied (1,08%). Aux membres supérieurs, les localisations observées étaient les suivantes : arthrose de l’épaule: 21 (20,79%) ; arthrose digitale: 67 (66,33%), arthrose du coude 7 (6,93%), arthrose du poignet 9(8,91%). Conclusion : L’arthrose des membres touche les femmes obèses et domine aux membres inférieurs. Le genou reste sa localisation la plus fréquente. Objective: Determine the topographies of osteoarthritis of the limbs in patients seen in rheumatology in Abidjan. Methodology: Cross-sectional study was conducted in the rheumatology department of the Cocody University Hospital in Abidjan (Ivory Coast) from 1st February to 10 May 2023. Patients who came for a rheumatology consultation presenting with mechanical arthralgia of the limbs and with imagery were included. The diagnosis was made by the medical doctor on the basis of clinical and paraclinical arguments. The Kellgren and Lawrence criteria allowed the classification of the radiological stages of osteoarthritis of the limbs. We were interested in sociodemographic, clinical and paraclinical data. Results: Two hundred and eighty-six patients were enrolled during the study period. The mean age of patients was 55 years ± 11 years and the sex ratio was 0,42. The dominant socio-professional category was the informal sector (34.96%). The majority of patients had a low socio-economic level (80.2%) and lived in urban area (92.06%). The most common antecedents were hypertension (33.21%) and peptic ulcer (17.13%). The patients were 68.18% obese. The average duration of symptom progression until diagnosis was 11 months. There were 185 localizations of osteoarthritis in the lower limbs (64.68%) and 101 localizations in the upper limbs (35.31%). The different topographies in the lower limbs included: knees 163 (88.10%); hips 14 (7.56%); osteoarthritis of the ankle 7 (3.78%), osteoarthritis of the midfoot (1.08%). For the upper limbs, the localizations observed were as follows : digital osteoarthritis 67 (66.33%), osteoarthritis of shoulder 21 (20.79%), osteoarthritis of elbow 7 (6.93%), osteoarthritis of wrist 9 (8.91%). Conclusion: Osteoarthritis of limbs affected obese women and was dominated by lower limbs. The knee remains its most frequent localization.
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William Mariya Joseph, A., R. L. Meena, and V. S. Arya. "Land Resource Inventory for Evaluation of Land Capability and Land Use Planning in Palakkad District of Kerala State using Remote Sensing and GIS Techniques." Agropedology 32, no. 1 (June 1, 2019). http://dx.doi.org/10.47114/j.agroped.2022.jun3.
Анотація:
Land resource inventory was carried out in Palakkad District using remote sensing, GIS and GPS technologies. IRS- ID, LISS-III Satellite imageries were used to delineate different soil units based on image characteristics and was correlated with the different landforms. A standard soil survey methodology was followed to prepare soil resources map of the area. The inherent soil properties as an internal attributes and topography, physiographic unit, slope and climate as an external land feature of each mapping unit were evaluated for their capability occuring. It was found that soils developed on valleys and pediplain covered an area of 45.7 per cent under agriculture and plantation crops and have been classified in Land capability class II and III. Soils of foothill slope and pediment constituting 5.7 per cent of the area were classified in class III and IV and covered by plantation and open scrub. Soils of hill side slope covered an area of 8.8 per cent and classified under class VI and VII with plantation and open scrub. Reserve Forest area which constitutes 29.1 percent was not grouped as per capability classification criteria. The study indicated that Physical, chemical and biological phenomenon occur in natural habitat and conservation processes play a decisive role and should be considered for designing proper Land use planning aimed at the effective utilization of land according to their classes.
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Bhatnagar, Saheba, Stefano Puliti, Bruce Talbot, Joachim Bernd Heppelmann, Johannes Breidenbach, and Rasmus Astrup. "Mapping wheel-ruts from timber harvesting operations using deep learning techniques in drone imagery." Forestry: An International Journal of Forest Research, July 2, 2022. http://dx.doi.org/10.1093/forestry/cpac023.
Анотація:
Abstract Wheel ruts, i.e. soil deformations caused by harvesting machines, are considered a negative environmental impact of forest operations and should be avoided or ameliorated. However, the mapping of wheel ruts that would be required to monitor harvesting operations and to plan amelioration measures is a tedious and time-consuming task. Here, we examined whether a combination of drone imagery and algorithms from the field of artificial intelligence can automate the mapping of wheel ruts. We used a deep-learning image-segmentation method (ResNet50 + UNet architecture) that was trained on drone imagery acquired shortly after harvests in Norway, where more than 160 km of wheel ruts were manually digitized. The cross-validation of the model based on 20 harvested sites resulted in F1 scores of 0.69–0.84 with an average of 0.77, and in total, 79 per cent of wheel ruts were correctly detected. The highest accuracy was obtained for severe wheel ruts (average user’s accuracy (UA) = 76 per cent), and the lowest accuracy was obtained for light wheel ruts (average UA = 67 per cent). Considering the nowadays ubiquitous availability of drones, the approach presented in our study has the potential to greatly increase the ability to effectively map and monitor the environmental impact of final felling operations with respect to wheel ruts. The automated mapping of wheel ruts may serve as an important input to soil impact analyses and thereby support measures to restore soil damages.
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Administrateur- JAIM, OUEDRAOGO Nina-Astrid, BAMBARA Augustin Tozoula, AWUKLU Yvon, KAMBOU TIEMTORE Bénilde Marie Ange, NAPON Aischa Madina, DIALLO Ousséini, and CISSE Rabiou. "Connaissance des agents de santé sur le dépistage radiologique du cancer du sein à Ouagadougou en 2019." Journal Africain d'Imagerie Médicale (J Afr Imag Méd). Journal Officiel de la Société de Radiologie d’Afrique Noire Francophone (SRANF). 13, no. 4 (January 17, 2022). http://dx.doi.org/10.55715/jaim.v13i4.285.
Анотація:
Objectives: to assess the knowledge of health workers on radiological screening for breast cancer. Methods: Descriptive cross-sectional study, carried out from February 18 to April 5, 2019. Inclusion criteria: general practitioners, doctors specializing in gynecology (DES), gynecologists, midwives / midwives from three university hospital centers in the city of Ouagadougou. Two hundred and two health workers were selected. Results: 143 health workers or 70.79% prescribed breast imaging. Female staff represented 72.03%, or a sex ratio of 0.39. The average age of prescribers was 38.17 + 7.20 years. 20.98% of agents regularly ordered breast imaging with a weekly mean of 2.67 + 2.04. The best known x-rays were mammography in 94.40% of cases and breast ultrasound in 90.21% of cases. As a means of screening for breast cancer, 48.95% of prescribers cited mammography and 36.36%, breast ultrasound. Regarding the age at the start of screening, 58.73% of prescribers were in favor of starting it before the age of 40, with a periodicity of 2 years for 30.07% of them. The American College of Radiology (ACR) Breast Imaging Report and Data System (BIRADS) classification was known by 37.76% of prescribers. The mean knowledge score of prescribers was 46.57 + 16.45%. Conclusion: There are gaps in the knowledge of prescribers in terms of radiological screening for breast cancer in Burkina Faso. Emphasis should be placed on training these agents, a factor in the success of a systematic breast cancer screening program in Burkina Faso. RESUME Objectifs : évaluer les connaissances des agents de santé sur le dépistage radiologique du cancer du sein. Méthodes. Il s’est agi d’une étude transversale descriptive, effectuée du 18 février au 5 avril 2019. Ont été inclus les médecins généralistes, les médecins en spécialisation en gynécologie (DES), les gynécologues, les sage femmes ou maïeuticiens issus de trois centres hospitalo-universitaires de la ville de Ouagadougou. Deux cent deux agents de santé ont été colligés. Résultats : 143 agents de santé soit 70,79% prescrivaient une imagerie mammaire. Le personnel féminin représentait 72,03% soit un sex ratio de 0,39. L’âge moyen des prescripteurs était de 38,17 + 7,20 ans. 20,98% des agents prescrivaient régulièrement une imagerie mammaire avec une moyenne hebdomadaire de 2,67 + 2,04. Les examens radiologiques les plus connus étaient la mammographie dans 94,40% des cas et l’échographie mammaire dans 90,21% des cas. Comme moyen de dépistage du cancer du sein, 48,95% des prescripteurs citaient la mammographie et 36,36%, l’échographie mammaire. Concernant l’âge de début du dépistage, 58,73% des prescripteurs étaient favorables à le commencer avant l’âge de 40 ans, avec une périodicité de 2 ans pour 30,07% d’entre eux. La classification du Breast Imaging Report and Data System (BIRADS) de l’American College of Radiology (ACR) était connue par 37,76% des prescripteurs. Le score moyen des connaissances des prescripteurs était de 46,57 + 16,45%. Conclusion : Il existe des insuffisances relatives aux connaissances des prescripteurs en matière de dépistage radiologique du cancer du sein au Burkina Faso. Un accent devrait être apporté sur la formation de ces agents, facteur de réussite d’un programme de dépistage systématique du cancer du sein au Burkina Faso.
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Desai, Krishna, N. L. Rajesh, U. K. Shanwad, N. Ananda, B. G. Koppalkar, B. K. Desai, V. Rajesh, Kirana Kumara, and Chandralekha. "Geospatial Techniques for Paddy Crop Acreage and Yield Estimation." Current Journal of Applied Science and Technology, June 11, 2020, 71–79. http://dx.doi.org/10.9734/cjast/2020/v39i1430704.
Анотація:
Paddy crop acreage and yield estimation using geospatial technology were carried out in North Eastern Dry Zone (Zone-2) covering Shorapur taluk, Yadgir district, Karnataka state, India, during rabi late sown or summer 2016-17 season. The study area is located between 16° 20ꞌ to 17° 45ꞌ north latitude and 76° 04ꞌ to 77° 42ꞌ east longitude, at an elevation of 428 meters above mean sea level. The RESOURCESAT-1 LISS III satellite image of 31st January 2017, 24th February 2017, 20th March 2017 and LANDSAT-8 of 15th April 2017 were used for paddy crop acreage estimation at taluk level. Paddy signatures were identified using ground truth GPS data and then, these temporal imageries were subjected to NDVI classification and estimated the paddy biomass and further validated with the ground-truthing in corresponding to Green Seeker NDVI value. The estimated paddy crop acreage through imagery NDVI were 2145.75 ha, 17602.21 ha, 19838 ha and 23004.01 ha area during Jan-2017, Feb-2017, March-2017 and April-2017 respectively. When these results were compared with acreage estimates as reported by the State Department of Agriculture, shown a relative deviation of 11.41, 35.78, 23.01& 3.89 per cent for Jan-2017, Feb-2017, March-2017 and April-2017 respectively. Therefore, LandSat-8 NDVI paddy acreage has showed significantly on par with the ground truth data at the crop harvest stage. Relative deviation of 10.75 for yield comparison among imagery NDVI biomass yield with the DOA yield estimation infer that NDVI biomass yield estimation would give better result at 90 days after sowing. Positive correlation of NDVI values with estimated acreage and yield, indicates that application of remote sensing techniques for forecasting paddy biomass yield is more accurate, economical and could be beneficial to the policy makers for quick decisions.
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Lu, Lejun, and Yu Zhou. "Coseismic deformation of the 1976 Ms 7.3 Chaldiran earthquake in eastern Turkey measured by satellite imagery, in comparison with field measurements." Geophysical Journal International, March 25, 2023. http://dx.doi.org/10.1093/gji/ggad136.
Анотація:
Summary Large continental earthquakes are infrequent, but they are important for understanding active tectonics. Many pre-1990, magnitude greater than 7 earthquakes have not been well documented due to a lack of data. The declassification of KeyHole (KH) imagery provides opportunities for investigating those historical events. In this study, we present new geodetic observations of surface deformation from the 1976/11/24 Ms 7.3 Chaldiran earthquake in eastern Turkey. We use various historical KH imagery and modern Pleiades stereo imagery to determine the coseismic deformation, providing new constraints on the 1976 rupture. Based on the image measurements, we resolve the coseismic slip at depth. The inverted slip from a simple elastic dislocation model, ∼4.0 m at shallow depth of the Hidirmentes segment, is larger than the surface displacement, around 3 m from previous field surveys, suggesting that the coseismic deformation is a combination of slip on the primary fault with 30±16 per cent off-fault deformation. We also measure cumulative offsets at two sites with well-preserved features, and find a constant ratio of horizontal to vertical offsets throughout the past few earthquake cycles. Both the observed constant slip ratio in this study and offset clusters from previous field measurements support that the Chaldiran fault exhibits a characteristic slip behaviour in the late Quaternary. By combining all the geodetic and geological observations in the broader region, we also present a brief analysis of the slip rate of the Chaldiran fault.
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Admin, Admin, TIEMTORE-KAMBOU Bénilde Marie-Ange, NAPON Aischa Madina, NDE OUEDRAOGO Nina Astrid, DIALLO Ousséini, LOUGUE/SORGHO Claudine Léonie, and CISSE Rabiou. "Évaluation préliminaire de l’enseignement du cours d’imagerie médicale par les étudiants en médecine de l’université Joseph Ki-Zerbo." Journal Africain d'Imagerie Médicale (J Afr Imag Méd). Journal Officiel de la Société de Radiologie d’Afrique Noire Francophone (SRANF). 12, no. 3 (December 27, 2020). http://dx.doi.org/10.55715/jaim.v12i3.116.
Анотація:
Objectives: Student Assessment of Education, is an institutional standard in a growing number of universities. CAMES instituted it in one of its repositories, but no data was available at our university. The aim was to evaluate the teaching of medical imaging course in master’s 2 by students with a view to making improvements Methods: cross-sectional study of the evaluation of a teaching by students on the teaching unit “pathology in medical imaging” provided to students in master 2 of medicine. The results were obtained through a paper survey for guided responses and an electronic survey for free comments. The variables studied were: the gender of students, the response rate, participation in teaching, overall evaluation of teaching, achievement of teaching objectives, teaching content, pedagogy used, knowledge control and organization of teaching. The statistical tests used were the student’s test after converting the responses into quantitative data with 0 = not at all, 1 = rather no, 2 = rather yes, 3= quite satisfactory. Results: a total of 237 out of 426 regularly enrolled students answered the survey, ie a response rate of 55.63%. There were 52.32% girls (124). One hundred and fifty-two students (65.52%) had attended all classes. The overall assessment of the teaching was considered satisfactory by 90.90% of the students. The satisfactory rate was over 80% for all items except that of materiel conditions (78.18%) entering into the pedagogy used. The objectives were clearly defined and those stated were met 100%. The introduction of syllabi and formal tutorials were the students ‘request. Conclusion: this evaluation of teaching showed a fairly satisfactory rate expressed by the student with an average of 96.84%. However, areas of improvement were mentioned by them and must be taken into account for quality education RÉSUMÉ Objectif : L’évaluation de l’enseignement par les étudiants (EEE), est une norme institutionnelle dans un nombre croissant d'universités. Le CAMES (Conseil Africain et malgache pour l’Enseignement Supérieur) l’a institué dans un de ses référentiels, mais aucune donnée n’a été disponible dans notre université. Le but était d’évaluer l’enseignement du cours d’imagerie médicale en master 2 par les étudiants en vue d’apporter des améliorations. Méthodes : Étude transversale d’Évaluation d'un Enseignement par les Étudiants (EEE) sur l’unité d’enseignement « pathologie en imagerie médicale » dispensée aux étudiants en master 2 de médecine. Les résultats ont été obtenus à travers un questionnaire papier pour les réponses guidées et un questionnaire électronique pour les commentaires libres. Les variables étudiées étaient : le genre des étudiants, le taux de réponse, la participation aux enseignements, l’évaluation globale de l’enseignement, l’atteinte des objectifs de l’enseignement, le contenu de l’enseignement, la pédagogie utilisée, le contrôle de connaissance et l’organisation de l’enseignement. Les tests statistiques utilisés étaient le test de Student après avoir converti les réponses en données quantitatives avec 0 = pas du tout ; 1 = plutôt non, 2 = plutôt oui ; 3 = tout à fait satisfaisant. Résultats : Au total 237 sur 426 étudiants régulièrement inscrits ont répondu au questionnaire soit un taux de réponse de 55,63 %. Il y avait 52,32% de filles (124). Cent cinquante-deux étudiants (65,52 %) avaient assisté à tous les cours. L’évaluation globale de l’enseignement, était jugée satisfaisante par 90,90% des étudiants. Le taux de satisfaction était au-dessus de 80 % pour tous les items sauf celui des conditions matérielles (78,18%) entrant dans la pédagogie utilisée. Les objectifs étaient clairement définis et ceux énoncés étaient respectés à 100%. L’introduction des syllabi et de TD formalisés constituaient la requête des étudiants. Conclusion : cette évaluation de l’enseignement a montré une satisfaction exprimée par les étudiants avec une moyenne de 96,84 %. Cependant des pistes d’améliorations ont été évoquées par ceux-ci et doivent être prises en compte pour un enseignement de qualité.
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Kollo, NzimaBrice, Aboubakar Bamba, Eric Dangui, Mohamed Diomandé, Edmond Eti, Joseph Enoch Koffi, Christian Louis Kouakou Ehaulier, Hilary Brenda Ngon Nzima, and Medom Hadia Ada Kanbaye. "Formes Topographiques des Arthroses des Membres en Consultation Rhumatologique à Abidjan." European Scientific Journal ESJ 27 (March 7, 2024). http://dx.doi.org/10.19044/esipreprint.3.2024.p218.
Анотація:
Objectif: Déterminer la fréquence et les formes topographiques des arthroses des membres en rhumatologie à Abidjan. Méthodologie: Etude transversale réalisée dans le service de rhumatologie du CHU de Cocody à Abidjan (Côte d’Ivoire) sur une période allant du 1er Février 2023 au 31 Août 2023. Deux cent quatre-vingt-six patients venus en consultation de rhumatologie présentant des arthralgies mécaniques des membres et disposant des imageries ont été inclus. Les critères de Kellgren et Lawrence avaient permis la classification des stades radiologiques de l’arthrose des membres. Nous nous sommes intéressés aux données sociodémographiques, cliniques et paracliniques. Résultats: La fréquence hospitalière des arthroses des membres était de 37.63% soit 286 sur 760 patients recensés pendant la période d’étude. L’effectif comprenait 201 femmes (70,27%) et 85 hommes (29,72%) avec un âge moyen de 55 ans ± 11 ans (Extrême : 22 ans et 84 ans). La principale catégorie socio-professionnelle était le secteur informel (34,96%). La majorité des patients avait un niveau socio-économique bas (80,2%) et vivait en milieu urbain (92,06%). Les antécédents les plus retrouvés étaient l’hypertension (33,21%) et l’ulcère gastro-duodénal (17,13%). Les patients étaient obèses à 68,18%. La durée moyenne d’évolution des symptômes jusqu’au diagnostic était de 11 mois. On retrouvait 185 localisations d’arthrose aux membres inférieurs (64,68%) et de 101 localisations aux membres supérieurs (35,31%). Les formes topographiques observées aux membres inférieurs incluaient : gonarthrose 163 (88,10%) ; coxarthrose 14 (7,56%); arthrose de la cheville 7 (3,78%), arthrose du mediopied (1,08%). Aux membres supérieurs, les localisations observées étaient les suivantes : arthrose de l’épaule: 21 (20,79%) ; arthrose digitale: 67 (66,33%), arthrose du coude 7 (6,93%), arthrose du poignet 9(8,91%). Conclusion : L’arthrose touche plus les membres inférieurs que les membres supérieurs. Le genou reste sa localisation la plus fréquente. Objective: Determine the prevalence and topographies of osteoarthritis of the limbs in patients seen in rheumatology in Abidjan. Methodology: Cross-sectional study was conducted in the rheumatology department of the Cocody University Hospital in Abidjan (Ivory Coast) from 1st February 2023 to 31st August 2023. Two hundred and eighty-six patients who came for a rheumatology consultation presenting with mechanical arthralgia of the limbs and with imagery were included. The Kellgren and Lawrence criteria allowed the classification of the radiological stages of osteoarthritis of the limbs. We were interested in sociodemographic, clinical and paraclinical data. Results: The hospital frequency of osteoarthritis of the limbs was 37.63% i.e 286 out of 760 patients surveyed during the study period. There were 201 women (70.27%) and 85 men (29.72%) with an average age of 55 years ± 11 years (Extreme: 22 years and 84 years). The dominant socio-professional category was the informal sector (34.96%). The majority of patients had a low socio-economic level (80.2%) and lived in urban area (92.06%). The most common antecedents were hypertension (33.21%) and peptic ulcer (17.13%). The patients were 68.18% obese. The average duration of symptom progression until diagnosis was 11 months. There were 185 localizations of osteoarthritis in the lower limbs (64.68%) and 101 localizations in the upper limbs (35.31%). The different topographies in the lower limbs included: knees 163 (88.10%); hips 14 (7.56%); osteoarthritis of the ankle 7 (3.78%), osteoarthritis of the midfoot (1.08%). For the upper limbs, the localizations observed were as follows : digital osteoarthritis 67 (66.33%), osteoarthritis of shoulder 21 (20.79%), osteoarthritis of elbow 7 (6.93%), osteoarthritis of wrist 9 (8.91%). Conclusion: Osteoarthritis affects more the lower limbs than the upper limbs. The knee remains its most frequent localization.