Journal articles on the topic 'Glozel artifacts'
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Gherdjikov, Serghey. "Artifacts 2. Virtual and Real." Filosofiya-Philosophy 30, no. 4 (December 6, 2021): 394–401. http://dx.doi.org/10.53656/phil2021-04-06.
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In this paper I present a new dimension for philosophical and scientific analysis of artifacts as anthropogenic abiotic objects along the lines of the distinction between real and virtual. This distinction purports to replace the classical opposition material–ideal as a better way of defining what an artifact is and as one more compatible with the scientific description and explanation of artefacts. The virtual relativity of the virtual artifacts is their relatedness to local language forms as an adequate coordinate system. The real relativity of artifacts is their relatedness to local and global human life processes. The article follows empirical science as a technique of studying artifacts, and subscribes to the anthropological paradigm.
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Tang, Chen, and George A. McMechan. "Combining multidirectional source vector with antitruncation-artifact Fourier transform to calculate angle gathers from reverse time migration in two steps." GEOPHYSICS 82, no. 5 (September 1, 2017): S359—S376. http://dx.doi.org/10.1190/geo2016-0408.1.
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Because receiver wavefields reconstructed from observed data are not as stable as synthetic source wavefields, the source-propagation vector and the reflector normal have often been used to calculate angle-domain common-image gathers (ADCIGs) from reverse time migration. However, the existing data flows have three main limitations: (1) Calculating the propagation direction only at the wavefields with maximum amplitudes ignores multiarrivals; using the crosscorrelation imaging condition at each time step can include the multiarrivals but will result in backscattering artifacts. (2) Neither amplitude picking nor Poynting-vector calculations are accurate for overlapping wavefields. (3) Calculating the reflector normal in space is not accurate for a structurally complicated reflection image, and calculating it in the wavenumber ([Formula: see text]) domain may give Fourier truncation artifacts. We address these three limitations in an improved data flow with two steps: During imaging, we use a multidirectional Poynting vector (MPV) to calculate the propagation vectors of the source wavefield at each time step and output intermediate source-angle-domain CIGs (SACIGs). After imaging, we use an antitruncation-artifact Fourier transform (ATFT) to convert SACIGs to ADCIGs in the [Formula: see text]-domain. To achieve the new flow, another three innovative aspects are included. In the first step, we develop an angle-tapering scheme to remove the Fourier truncation artifacts during the wave decomposition (of MPV) while preserving the amplitudes, and we use a wavefield decomposition plus angle-filter imaging condition to remove the backscattering artifacts in the SACIGs. In the second step, we compare two algorithms to remove the Fourier truncation artifacts that are caused by the plane-wave assumption. One uses an antileakage FT (ALFT) in local windows; the other uses an antitruncation-artifact FT, which relaxes the plane-wave assumption and thus can be done for the global space. The second algorithm is preferred. Numerical tests indicate that this new flow (source-side MPV plus ATFT) gives high-quality ADCIGs.
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Hu, Zhongbo, and Jordi J. Mallorquí. "An Accurate Method to Correct Atmospheric Phase Delay for InSAR with the ERA5 Global Atmospheric Model." Remote Sensing 11, no. 17 (August 21, 2019): 1969. http://dx.doi.org/10.3390/rs11171969.
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Differential SAR Interferometry (DInSAR) has proven its unprecedented ability and merits of monitoring ground deformation on a large scale with centimeter to millimeter accuracy. However, atmospheric artifacts due to spatial and temporal variations of the atmospheric state often affect the reliability and accuracy of its results. The commonly-known Atmospheric Phase Screen (APS) appears in the interferograms as ghost fringes not related to either topography or deformation. Atmospheric artifact mitigation remains one of the biggest challenges to be addressed within the DInSAR community. State-of-the-art research works have revealed that atmospheric artifacts can be partially compensated with empirical models, point-wise GPS zenith path delay, and numerical weather prediction models. In this study, we implement an accurate and realistic computing strategy using atmospheric reanalysis ERA5 data to estimate atmospheric artifacts. With this approach, the Line-of-Sight (LOS) path along the satellite trajectory and the monitored points is considered, rather than estimating it from the zenith path delay. Compared with the zenith delay-based method, the key advantage is that it can avoid errors caused by any anisotropic atmospheric phenomena. The accurate method is validated with Sentinel-1 data in three different test sites: Tenerife island (Spain), Almería (Spain), and Crete island (Greece). The effectiveness and performance of the method to remove APS from interferograms is evaluated in the three test sites showing a great improvement with respect to the zenith-based approach.
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Zhang, Xinjian, Su Yang, Wuyang Luo, Longwen Gao, and Weishan Zhang. "Video Compression Artifact Reduction by Fusing Motion Compensation and Global Context in a Swin-CNN Based Parallel Architecture." Proceedings of the AAAI Conference on Artificial Intelligence 37, no. 3 (June 26, 2023): 3489–97. http://dx.doi.org/10.1609/aaai.v37i3.25458.
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Video Compression Artifact Reduction aims to reduce the artifacts caused by video compression algorithms and improve the quality of compressed video frames. The critical challenge in this task is to make use of the redundant high-quality information in compressed frames for compensation as much as possible. Two important possible compensations: Motion compensation and global context, are not comprehensively considered in previous works, leading to inferior results. The key idea of this paper is to fuse the motion compensation and global context together to gain more compensation information to improve the quality of compressed videos. Here, we propose a novel Spatio-Temporal Compensation Fusion (STCF) framework with the Parallel Swin-CNN Fusion (PSCF) block, which can simultaneously learn and merge the motion compensation and global context to reduce the video compression artifacts. Specifically, a temporal self-attention strategy based on shifted windows is developed to capture the global context in an efficient way, for which we use the Swin transformer layer in the PSCF block. Moreover, an additional Ada-CNN layer is applied in the PSCF block to extract the motion compensation. Experimental results demonstrate that our proposed STCF framework outperforms the state-of-the-art methods up to 0.23dB (27% improvement) on the MFQEv2 dataset.
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Colarco, P. R., R. A. Kahn, L. A. Remer, and R. C. Levy. "Impact of satellite viewing swath width on global and regional aerosol optical thickness statistics and trends." Atmospheric Measurement Techniques Discussions 6, no. 6 (November 27, 2013): 10117–63. http://dx.doi.org/10.5194/amtd-6-10117-2013.
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Abstract. We use the Moderate Resolution Imaging Spectroradiometer (MODIS) satellite aerosol optical thickness (AOT) product to assess the impact of reduced swath width on global and regional AOT statistics and trends. Ten different sampling strategies are employed, in which the full MODIS dataset is sub-sampled with various narrow-swath (~400–800 km) and curtain-like (~10 km) along-track configurations. Although view-angle artifacts in the MODIS AOT retrieval confound direct comparisons between averages derived from different sub-samples, careful analysis shows that with many portions of the Earth essentially unobserved, the AOT statistics of these sub-samples exhibit significant regional and seasonal biases. These AOT spatial sampling artifacts comprise up to 60% of the full-swath AOT value under moderate aerosol loading, and can be as large as 0.1 in some regions under high aerosol loading. Compared to full-swath observations, narrower swaths exhibit a reduced ability to detect AOT trends with statistical significance, and for curtain-like sampling we do not find any statistically significant decadal-scale trends at all. An across-track sampling strategy obviates the MODIS view angle artifact, and its mean AOT converges to the full-swath mean values for sufficiently coarse spatial and temporal aggregation. Nevertheless, across-track sampling has significant seasonal-regional sampling artifacts, leading to biases comparable to the curtain-like along-track sampling, lacks sufficient coverage to assign statistical significance to aerosol trends, and is not achievable with an actual narrow-swath or curtain-like instrument. These results suggest that future aerosol satellite missions having significantly less than full-swath viewing are unlikely to sample the true AOT distribution well enough to determine decadal-scale trends or to obtain the statistics needed to reduce uncertainty in aerosol direct forcing of climate.
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Colarco, P. R., R. A. Kahn, L. A. Remer, and R. C. Levy. "Impact of satellite viewing-swath width on global and regional aerosol optical thickness statistics and trends." Atmospheric Measurement Techniques 7, no. 7 (July 31, 2014): 2313–35. http://dx.doi.org/10.5194/amt-7-2313-2014.
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Abstract. We use the Moderate Resolution Imaging Spectroradiometer (MODIS) satellite aerosol optical thickness (AOT) product to assess the impact of reduced swath width on global and regional AOT statistics and trends. Along-track and across-track sampling strategies are employed, in which the full MODIS data set is sub-sampled with various narrow-swath (~ 400–800 km) and single pixel width (~ 10 km) configurations. Although view-angle artifacts in the MODIS AOT retrieval confound direct comparisons between averages derived from different sub-samples, careful analysis shows that with many portions of the Earth essentially unobserved, spatial sampling introduces uncertainty in the derived seasonal–regional mean AOT. These AOT spatial sampling artifacts comprise up to 60% of the full-swath AOT value under moderate aerosol loading, and can be as large as 0.1 in some regions under high aerosol loading. Compared to full-swath observations, narrower swath and single pixel width sampling exhibits a reduced ability to detect AOT trends with statistical significance. On the other hand, estimates of the global, annual mean AOT do not vary significantly from the full-swath values as spatial sampling is reduced. Aggregation of the MODIS data at coarse grid scales (10°) shows consistency in the aerosol trends across sampling strategies, with increased statistical confidence, but quantitative errors in the derived trends are found even for the full-swath data when compared to high spatial resolution (0.5°) aggregations. Using results of a model-derived aerosol reanalysis, we find consistency in our conclusions about a seasonal–regional spatial sampling artifact in AOT. Furthermore, the model shows that reduced spatial sampling can amount to uncertainty in computed shortwave top-of-atmosphere aerosol radiative forcing of 2–3 W m−2. These artifacts are lower bounds, as possibly other unconsidered sampling strategies would perform less well. These results suggest that future aerosol satellite missions having significantly less than full-swath viewing are unlikely to sample the true AOT distribution well enough to obtain the statistics needed to reduce uncertainty in aerosol direct forcing of climate.
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Schuyler, Robert L. "Between Artifacts and Texts: Historical Archaeology in Global Perspective:Between Artifacts and Texts: Historical Archaeology in Global Perspective." American Anthropologist 101, no. 4 (December 1999): 845–46. http://dx.doi.org/10.1525/aa.1999.101.4.845.
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Aghdasifam, Masoud, Habib Izadkhah, and Ayaz Isazadeh. "A New Metaheuristic-Based Hierarchical Clustering Algorithm for Software Modularization." Complexity 2020 (September 30, 2020): 1–25. http://dx.doi.org/10.1155/2020/1794947.
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Software refactoring is a software maintenance action to improve the software internal quality without changing its external behavior. During the maintenance process, structural refactoring is performed by remodularizing the source code. Software clustering is a modularization technique to remodularize artifacts of source code aiming to improve readability and reusability. Due to the NP hardness of the clustering problem, evolutionary approaches such as the genetic algorithm have been used to solve this problem. In the structural refactoring literature, there exists no search-based algorithm that employs a hierarchical approach for modularization. Utilizing global and local search strategies, in this paper, a new search-based top-down hierarchical clustering approach, named TDHC, is proposed that can be used to modularize the system. The output of the algorithm is a tree in which each node is an artifact composed of all artifacts in its subtrees and is a candidate to be a software module (i.e., cluster). This tree helps a software maintainer to have better vision on source code structure to decide appropriate composition points of artifacts aiming to create modules (i.e., files, packages, and components). Experimental results on seven folders of Mozilla Firefox with different functionalities and five other software systems show that the TDHC produces modularization closer to the human expert’s decomposition (i.e., directory structure) than the other existing algorithms. The proposed algorithm is expected to help a software maintainer for better remodularization of a source code. The source codes and dataset related to this paper can be accessed at https://github.com/SoftwareMaintenanceLab.
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Mejía Sarmiento, Javier Ricardo, Gert Pasman, Erik Jan Hultink, and Pieter Jan Stappers. "‘Concept Cars’ as Vehicles for Change in SMEs." Temes de Disseny, no. 36 (October 1, 2020): 40–69. http://dx.doi.org/10.46467/tdd36.2020.40-69.
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Making prototypes of fictitious artifacts has long been applied in corporations as a design-led way to envisioning the future. These techniques make use of design to explore speculative futures translating abstract questions into concrete objects and bringing the human dimension and experience into futures techniques. The design-led strategic foresight techniques follow making activities – including visual synthesis, prototyping and storytelling – and result in experimental and experiential artifacts offering concrete, hands-on and specific images of the futures. An example of these techniques is the making and sharing of concept cars, a long-standing practice in the automotive industry. These artifacts facilitate the sharing of future visions, which embody future ideas, to diverse people.
Whereas corporations use these design-led strategic foresight techniques as a driver for innovation, small and medium-sized enterprises, which are the backbone of society and the global economy, have been deprived of these kinds of explorations due to their being resource intensive.
To help these enterprises, we developed DIVE (design, innovation, vision and exploration) based on design-led strategic foresight techniques developed by corporations but adapted to the scale and needs of these small players. DIVE helps external designers and company representatives in making and sharing artifacts to envision the future of their company. The technique follows an analogy that invites participants to make a hole in the world as it is and descend underwater to the speculative futures and then come back to the reality. Along with this plunge into fiction, participants identify trends, create ideas about the future, and make a prototype of an artifact that is subsequently used to motivate people to talk about the company’s future and present. This artifact, the vision concept, includes ideas about the future product or service, the context and the business itself.
This paper aims to evaluate DIVE as a design-led strategic foresight technique and focuses on the benefits and limitations of its application. It includes two cases that explored the future of the shopping experience for the company Solutions Group. It is a Colombian medium-sized enterprise that develops and produces point-of-purchase materials for consumer goods corporations such as Procter & Gamble. In both cases, the participants employed DIVE activities to make and share a vision concept. At the end of the cases, the DIVE outcomes were validated by three external innovation experts.
DIVE proved its efficacy in supporting designers in setting future visions, prototyping vision concepts and stories and making recommendations for different time frames, and participants also learned about the strategic value of design.
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Chen, Ziwei, Yang Xu, Chao Zhang, and Min Tang. "Prediction of Glass Chemical Composition and Type Identification Based on Machine Learning Algorithms." Applied Sciences 14, no. 10 (May 9, 2024): 4017. http://dx.doi.org/10.3390/app14104017.
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Ancient glass artifacts were susceptible to weathering from the environment, causing changes in their chemical composition, which pose significant obstacles to the identification of glass products. Analyzing the chemical composition of ancient glass has been beneficial for evaluating their weathering status and proposing measures to reduce glass weathering. The objective of this study was to explore the optimal machine learning algorithm for glass type classification based on chemical composition. A set of glass artifact data including color, emblazonry, weathering, and chemical composition was employed and various methods including logistic regression and machine learning techniques were used. The results indicated that a significant correlation (p < 0.05) could only observed between surface weathering and the glass types (high-potassium and lead–barium). Based on the random forest and logistic regression models, the primary chemical components that signify glass types and weathering status were determined using PbO, K2O, BaO, SiO2, Al2O3, and P2O5. The random forest model presented a superior ability to identify glass types and weathering status, with a global accuracy of 96.3%. This study demonstrates the great potential of machine learning for glass chemical component estimation and glass type and weathering status identification, providing technical guidance for the appraisal of ancient glass artifacts.
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Bai, Jielin, Yitong Liu, and Hongwen Yang. "Sparse-View CT Reconstruction Based on a Hybrid Domain Model with Multi-Level Wavelet Transform." Sensors 22, no. 9 (April 22, 2022): 3228. http://dx.doi.org/10.3390/s22093228.
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The reconstruction of sparsely sampled projection data will generate obvious streaking artifacts, resulting in image quality degradation and affecting medical diagnosis results. Wavelet transform can effectively decompose directional components of image, so the artifact features and edge details with high directionality can be better detected in the wavelet domain. Therefore, a hybrid domain method based on wavelet transform is proposed in this paper for the sparse-view CT reconstruction. The reconstruction model combines wavelet, spatial, and radon domains to restore the projection consistency and enhance image details. In addition, the global distribution of artifacts requires the network to have a large receptive field, so that a multi-level wavelet transform network (MWCNN) is applied to the hybrid domain model. Wavelet transform is used in the encoding part of the network to reduce the size of feature maps instead of pooling operation and inverse wavelet transform is deployed in the decoding part to recover image details. The proposed method can achieve PSNR of 41.049 dB and SSIM of 0.958 with 120 projections of three angular intervals, and obtain the highest values in this paper. Through the results of numerical analysis and reconstructed images, it shows that the hybrid domain method is superior to the single-domain methods. At the same time, the multi-level wavelet transform model is more suitable for CT reconstruction than the single-level wavelet transform.
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Xu, Man, Renpeng Dong, Dongming Wu, Bingpeng Zhan, and Weiting Liu. "A SENSING MODULE WITH TWO DIFFERENT SENSING CHANNELS AIMS AT DIRECT MEASUREMENT OF PERIARTERIAL PRESSURE FOR WEARABLE TONOMETRY BLOOD PRESSURE DEVICE." Journal of Hypertension 42, Suppl 1 (May 2024): e84. http://dx.doi.org/10.1097/01.hjh.0001020104.46671.fa.
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Objective: This work focuses on development a new mini sensing module to directly measure periarterial pressure and reduce the effect of muscle action induced artifacts on blood pressure measurement. Design and method: The coupling of blood pressure signal with disturbances such as motion artifacts makes blood pressure measurement unreliable. It is significant to directly measure periarterial pressure and reduce the effect of motion artefacts in the applications of wearable blood pressure monitoring in daily life. The mini sensing module consists of two independent sensing channels (Fig.1). The two channels are closely aligned with the spacing only 1 mm in order to guarantee the blood pressure signal under the channels are same. The two channels have different sizes, one with 5 mm length and 3 mm width and the other one with 8 mm length and 3 mm width. The channels are filled with silicon oil, in the which a silicon die is fixed as pressure sensor unit. The channels are sealed by TPU flexible film with 0.2 mm thickness, which serves as the stimulation interface. Attach the sensor module to wrist and the channel direction is transverse to the arterial path. Specific design endows both channels with same sensitivity to global mechanical excitation and different sensitivity to local excitations. During BP measuring, external pressure and muscle motion artifact act on the entire channel surface serving as global excitation, so both channels have the same sensitivity to them. However, because the width of the radial artery is smaller than the length of the channel, the BP signal act on partial channel surface serving as local excitation. The BP signal has different sensitivity in two channels. The influence of motion artifacts is reduced by differential processing of the output signals of two channels, which also is presented in Fig.2. Results: Experiments have proved the effectiveness of the scheme. Conclusions: By comparison with the BP signal under optimal condition. The sensing module can directly measure periarterial pressure on blood pressure measurement.
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Lawrence, Mark G., Jochen Landgraf, Patrick Jöckel, and Brian Eaton. "Artifacts in global atmospheric modeling: Two recent examples." Eos, Transactions American Geophysical Union 80, no. 11 (1999): 123. http://dx.doi.org/10.1029/99eo00086.
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Bahmani, Ali, Hamed Karkehabadi, Abbas Shokri, and Maryam Farhadian. "Performance of Bioceramic-based Root Filling Material with Artifact Reduction Properties in the Detection of Vertical Root Fractures Using Cone-beam Computed Tomography." Open Dentistry Journal 15, no. 1 (April 19, 2021): 170–75. http://dx.doi.org/10.2174/1874210602115010170.
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Introduction: In Cone-beam Computed Tomography (CBCT) images, metallic artifacts by root filling materials reduce the quality of images. It seems that bioceramic sealers produce fewer artifacts than gutta-percha. In this situation, the possibility of VRF detection could increase, and therefore, flap and exploratory surgery would not be needed. The purpose of this study was to evaluate the performance of a bioceramic-based root filling material in the detection of Vertical Root Fractures (VRF) in CBCT imaging. Materials and Methods: This study was conducted at the dental school from March to August 2019, and 100 healthy human mandibular premolar teeth were obtained and randomly divided into two equal groups. The teeth were filled with either AH26 and gutta-percha or bioceramic root filling materials. VRF was induced on half of the decoronated teeth in each group using a Global Testing Machine, and the others were considered control. CBCT imaging was performed by the Cranex 3D machine. Comparisons of the 2 groups were made using the Mann-Whitney test. Results: There was a significant difference between the two groups of bioceramic and gutta-percha in the measured indices, including sensitivity (P=0.017), specificity (P=0.018), positive predictive value (P=0.018), negative predictive value (P=0.018), and accuracy (P=0.011). The Area Under Curve (AUC) also showed a significant difference between the two groups (P=0.011). According to Kappa test results, no significant difference was obtained between the findings of the two observers. Conclusion: Different root filling materials showed a different extent of artifact in CBCT images. Bioceramic root filling material induces fewer artifacts in CBCT images, and the diagnostic value of VRF in CBCT images in the root canals filled with it is greater than those filled with AH26 and gutta-percha.
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Macklin, Audrey. "Is it time to retire Nottebohm?" AJIL Unbound 111 (2017): 492–97. http://dx.doi.org/10.1017/aju.2018.5.
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[N]ationality is a legal bond having as its basis a social fact of attachment, a genuine connection of existence, interests and sentiments, together with the existence of reciprocal rights and duties. It may be said to constitute the juridical expression of the fact that the individual … is in fact more closely connected with the population of the State conferring nationality than with that of any other State. Scholars of migration and citizenship will recognize the famous passage from the judgment of the ICJ in Nottebohm and perhaps be able to recite it from memory. But Nottebohm is nearing sixty-five, and so the inevitable question arises: is it time to retire the case? One impetus for the project of global migration law is the recognition of “current structures as historically contingent artifacts of a sovereignty-based global system in need of reform.” No artifact does more work in sustaining the current configuration than the use of citizenship (or nationality) as the technology for regulating transnational movement. Sooner or later, a conversation about the emergence of global migration law must grapple with international law's position on nationality, which brings us back to Nottebohm.
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Kalmar, Attila, and David J. Currie. "The completeness of the continental fossil record and its impact on patterns of diversification." Paleobiology 36, no. 1 (2010): 51–60. http://dx.doi.org/10.1666/0094-8373-36.1.51.
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Did organisms diversify in different ways on land and in the marine realm over the Phanerozoic, or do the different diversification curves of continental and marine organisms reflect primarily methodological artifacts? To answer this question, a quantitative assessment of the completeness of the global continental fossil record is indispensable. We used comparisons between continental and marine fossil diversity and between past and present-day patterns of continental diversity to assess the absolute and relative completeness of the continental fossil record. Collector's curves of the number of described families over the past 200 years suggest that the global continental fossil record, and even that of European and North American tetrapods, is still highly incomplete. Nevertheless, relative proportions of major continental and marine taxa, patterns of tetrapod endemism, and familial durations suggest that the family-level continental fossil record is reasonably representative. We found that, although continental fossil richness is correlated with the amount of terrestrial clastic sediment available for sampling, the exponential diversification curve of continental metazoans is unlikely to be an artifact of this rock bias. Diversification of the continental fauna appears to have been essentially exponential since the Devonian, with little evidence of major extinction events.
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Satria, Bagus, Fajar Ramadhani, Syafei Karim, and Nur Aini. "A Virtual Museums and 3D Artefacts to Improve Cultural Heritage Education." TEPIAN 4, no. 4 (December 31, 2023): 175–82. http://dx.doi.org/10.51967/tepian.v4i4.2967.
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In the current era of globalization and modernization, the imperative to safeguard and convey cultural heritage and history to society becomes increasingly significant. Web-based virtual museums have emerged as a pivotal solution, facilitating the preservation and promotion of cultural heritage on a global scale. These virtual platforms offer visitors unprecedented access to artifact collections, transcending the limitations of physical museum visits. The immersive features, such as the ability to view objects from diverse angles and zoom in on intricate details, present a profound and engaging experience. This research is to contribute insights into the development of effective web-based virtual museums featuring 3D artifact representations, thereby making a meaningful contribution to the broader field of cultural heritage preservation. The primary objective of this study is to enrich the exploration and learning experiences of visitors in the realm of cultural heritage through digital platforms. The research employs a structured software development methodology encompassing vital stages like needs analysis, system design, implementation, testing, and maintenance. By focusing on the technological aspects, the study seeks to address challenges related to quality and reliability faced by web-based virtual museums. Furthermore, the findings aim to enhance the overall effectiveness of these museums in offering a comprehensive and captivating journey through cultural artifacts. This research is poised to not only advance the field of virtual museum development but also foster a deeper appreciation and understanding of our rich cultural heritage.
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Hornborg, Alf. "Artifacts have consequences, not agency." European Journal of Social Theory 20, no. 1 (July 24, 2016): 95–110. http://dx.doi.org/10.1177/1368431016640536.
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This article challenges the urge within Actor-Network Theory, posthumanism, and the ontological turn in sociology and anthropology to dissolve analytical distinctions between subject and object, society and nature, and human and non-human. It argues that only by acknowledging such distinctions and applying a realist ontology can exploitative and unsustainable global power relations be exposed. The predicament of the Anthropocene should not prompt us to abandon distinctions between society and nature but to refine the analytical framework through which we can distinguish between sentience and non-sentience and between the symbolic and non-symbolic. The incompatibility of posthumanist and Marxist approaches to the Anthropocene and the question of agency derives from ideological differences as well as different methodological proclivities. A central illustration of these differences is the understanding of fetishism, a concept viewed by posthumanists as condescending but by Marxists as emancipatory.
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Di Cosmo, Roberto, Morane Gruenpeter, Bruno Marmol, Alain Monteil, Laurent Romary, and Jozefina Sadowska. "Curated Archiving of Research Software Artifacts: Lessons Learned from the French Open Archive (HAL)." International Journal of Digital Curation 15, no. 1 (August 5, 2020): 16. http://dx.doi.org/10.2218/ijdc.v15i1.698.
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Software has become an indissociable support of technical and scientific knowledge. The preservation of this universal body of knowledge is as essential as preserving research articles and data sets. In the quest to make scientific results reproducible, and pass knowledge to future generations, we must preserve these three main pillars: research articles that describe the results, the data sets used or produced, and the software that embodies the logic of the data transformation.
The collaboration between Software Heritage (SWH), the Center for Direct Scientific Communication (CCSD) and the scientific and technical information services (IES) of The French Institute for Research in Computer Science and Automation (Inria) has resulted in a specified moderation and curation workflow for research software artifacts deposited in the HAL the French global open access repository. The curation workflow was developed to help digital librarians and archivists handle this new and peculiar artifact - software source code. While implementing the workflow, a set of guidelines has emerged from the challenges and the solutions put in place to help all actors involved in the process.
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Frehlich, Rod, and Robert Sharman. "The Use of Structure Functions and Spectra from Numerical Model Output to Determine Effective Model Resolution." Monthly Weather Review 136, no. 4 (April 1, 2008): 1537–53. http://dx.doi.org/10.1175/2007mwr2250.1.
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Abstract The effective model resolution of three numerical weather prediction (NWP) models is determined from analyses of spatial structure functions and spatial spectra. In this paper, the effective resolution is defined as the dimensions of the rectangular spatial filter that describes the net effect of all of the NWP model’s numerical filtering and smoothing effects. These effects are determined by comparison of spatial statistics of the NWP model output with statistical climatologies derived from aircraft data for the upper troposphere and lower stratosphere. The comparisons are based on both spatial structure functions and spatial spectra. The structure function approach has fewer assumptions and fewer numerical artifacts. Accurate estimates of NWP effective model resolution require a robust climatology of the spatial statistics, which are a function of latitude and location, such as over mountainous regions. An artifact in the climatology of the velocity statistics resulting from mountain waves is identified from NWP model output and corroborated with research aircraft data, which has not been previously observed in global statistical climatologies.
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Chandran, Prashanth, Loïc Ciccone, Markus Gross, and Derek Bradley. "Local anatomically-constrained facial performance retargeting." ACM Transactions on Graphics 41, no. 4 (July 2022): 1–14. http://dx.doi.org/10.1145/3528223.3530114.
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Generating realistic facial animation for CG characters and digital doubles is one of the hardest tasks in animation. A typical production workflow involves capturing the performance of a real actor using mo-cap technology, and transferring the captured motion to the target digital character. This process, known as retargeting , has been used for over a decade, and typically relies on either large blendshape rigs that are expensive to create, or direct deformation transfer algorithms that operate on individual geometric elements and are prone to artifacts. We present a new method for high-fidelity offline facial performance retargeting that is neither expensive nor artifact-prone. Our two step method first transfers local expression details to the target, and is followed by a global face surface prediction that uses anatomical constraints in order to stay in the feasible shape space of the target character. Our method also offers artists with familiar blendshape controls to perform fine adjustments to the retargeted animation. As such, our method is ideally suited for the complex task of human-to-human 3D facial performance retargeting, where the quality bar is extremely high in order to avoid the uncanny valley, while also being applicable for more common human-to-creature settings. We demonstrate the superior performance of our method over traditional deformation transfer algorithms, while achieving a quality comparable to current blendshape-based techniques used in production while requiring significantly fewer input shapes at setup time. A detailed user study corroborates the realistic and artifact free animations generated by our method in comparison to existing techniques.
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Vasko, Roman, Alla Korolyova, Tetiana Tolcheyeva, and Yan Kapranov. "Human Language as a Natural Artifact of Planetary-Noospheric Mind: Coevolutionary-Macromutational Reinterpretation." Revista Amazonia Investiga 9, no. 34 (November 23, 2020): 17–23. http://dx.doi.org/10.34069/ai/2020.34.10.2.
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The article discusses a new hypothesis of coevolutionary-macromutational origin of human language, through the prism of which this planetary-noospheric phenomenon is proposed to be considered as a natural artifact of holisticsynergetic coevolution of nature, society and culture. The following assumption has been suggested: the proposed hypothetical idea is a resonance of the former two philosophical theories: the fusion theory and the thesis theory, which were regarded by scientists either as natural or artificial (conventional / conditional) nature of human language. At the same time, they did not completely deny the origin of the human language as a result of various types of activities. The represented arguments helped to confirm the views of anthropologists, culturologists and other scholars. The creation of various artifacts (tangible and intangible) took place in all stages of evolution: geogenesis – biogenesis – psychogenesis – anthropogenesis and at a subsequent stage of Homo sapiens. However, language as the most important product of global evolutionism was formed at the stage of anthropogenesis, in particular as a corollary to the molecular mutations of human brain. The term “coevolution” has been transferred to the sphere of linguoanthropogenesis. In conjunction with the hypothesis of macromutation the natural artifact origin of human language is consistently explained under the scenario of biogenesis – sociogenesis – culturogenesis. The essence of the hypothetical result is that a qualitatively new driving force for the continuation of this scenario can be noospherogenesis, which is determined by historical and cultural development of mankind, its activities in all spheres of life and, most importantly, by the planetary high-tech mind.
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Wang, Xiang, Jichun He, Yi Liu, Pengcheng Zhang, Weiting Cheng, Bin Wang, and Zhiguo Gui. "DIDR-Net: a sparse-view CT deep iterative reconstruction network with an independent detail recovery network." Journal of Instrumentation 18, no. 05 (May 1, 2023): P05038. http://dx.doi.org/10.1088/1748-0221/18/05/p05038.
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Abstract Sparse-view CT is an effective method to reduce X-ray radiation dose in clinical CT imaging. However, sparse view image reconstruction is still challenging due to highly undersampled data. To this end, we propose a new deep learning-based reconstruction model of CT images, called DIDR-Net. Unlike existing methods, DIDR-Net employs a dual network structure, including an iterative reconstruction sub-network and a detail recovery sub-network. The iterative reconstruction sub-network expands the FISTA (Fast Iterative Soft Thresholding Algorithm) into a deep network, utilizing learnable nonlinear sparse transform and shrinkage thresholding to improve reconstruction performance. To avoid loss of image details while removing artifacts, we design a detail recovery sub-network. Specifically, this sub-network captures the local details and global information of the initial image through local and global branches, and adaptively fuses the results of these two branches through a fusion module. DIDR-Net generates both the initial reconstruction map and the detail feature map in a parallel manner, and finally fuses the two sides to reconstruct a high-quality CT image. Experimental results on the AAPM public dataset show that DIDR-Net exhibits better performance in both streak artifact removal and detail structure preservation compared to other advanced reconstruction algorithms.
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Arbara, Sophia, Akkelies Van Nes, and Ana Pereira Roders. "Cultural heritage attractors: does spatial configuration matter? Applications of macro- and micro-spatial configurative analysis in the historic urban area of Rome." Urban Morphology 27, no. 2 (October 29, 2023): 121–42. http://dx.doi.org/10.51347/um27.0012.
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Top world heritage artifacts act as pedestrian flow attractors in historic urban areas. Despite the growing literature on pedestrian movement in cities, evidence of the relationship between cultural attractors and the spatial characteristics of street spaces between these artifacts is scarce. This contribution applies the theory of natural movement and uses diachronic space syntax and micro-spatial analysis to investigate the reciprocities between street networks and the presence of global heritage attractors in the historic urban area of Rome. The results from the macro-scale spatial analyses show good correlations between the current most popular cultural attractors and the global integration of the street network. The degree of spatial integration of the street network is particularly important at the time of construction of important artifacts, as shown in the diachronic analyses. City growth and urban transformation can affect the central position of these important artifacts. However, in the case of highly attractive artifacts, these continue to perform as movement attractors. The result of a local neighbourhood investigation shows that micro-spatial parameters, such as the spatial relationships between building entrances and streets, may influence the choice of routes between important artifacts. Thus, the flows of people’s movement can be influenced by both micro-spatial street characteristics and spatial configuration.
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Li, Jianwei, Yongtao Wang, Haihua Xie, and Kai-Kuang Ma. "Learning Local and Global Priors for JPEG Image Artifacts Removal." IEEE Signal Processing Letters 27 (2020): 2134–38. http://dx.doi.org/10.1109/lsp.2020.3039932.
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Alves, José, Dinis Moreira, Pedro Alves, Luís Rosado, and Maria Vasconcelos. "Automatic Focus Assessment on Dermoscopic Images Acquired with Smartphones." Sensors 19, no. 22 (November 14, 2019): 4957. http://dx.doi.org/10.3390/s19224957.
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Over recent years, there has been an increase in popularity of the acquisition of dermoscopic skin lesion images using mobile devices, more specifically using the smartphone camera. The demand for self-care and telemedicine solutions requires suitable methods to guide and evaluate the acquired images’ quality in order to improve the monitoring of skin lesions. In this work, a system for automated focus assessment of dermoscopic images was developed using a feature-based machine learning approach. The system was designed to guide the user throughout the acquisition process by means of a preview image validation approach that included artifact detection and focus validation, followed by the image quality assessment of the acquired picture. This paper also introduces two different datasets, dermoscopic skin lesions and artifacts, which were collected using different mobile devices to develop and test the system. The best model for automatic preview assessment attained an overall accuracy of 77.9% while focus assessment of the acquired picture reached a global accuracy of 86.2%. These findings were validated by implementing the proposed methodology within an android application, demonstrating promising results as well as the viability of the proposed solution in a real life scenario.
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Carolan, Michael S. "Mapping Biotechnology: From Epistemic Artifacts to Geographies of Control." Nature and Culture 2, no. 2 (September 1, 2007): 115–38. http://dx.doi.org/10.3167/nc.2007.020202.
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This article maps key epistemological and ontological terrains associated with biotechnology. Beginning with the epistemological, a comparison is made between the scientific representations of today, particularly as found in the genomic sciences, and the scientific representations of the past. In doing this, we find these representations have changed over the centuries, which has been of significant consequence in terms of giving shape to today's global political economy. In the following section, the sociopolitical effects of biotechnology are discussed, particularly in terms of how the aforementioned representations give shape to global path dependencies. By examining the epistemological and ontological assumptions that give shape to the global distribution of informational and biological resources, this article seeks to add to our understanding of today's bioeconomy and the geographies of control it helps to create.
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South, Stanley. "Between Artifacts and Texts: Historical Archaeology in Global Perspective. Anders Andrén." Journal of Anthropological Research 55, no. 3 (October 1999): 460–61. http://dx.doi.org/10.1086/jar.55.3.3631401.
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Bueker, Catherine Simpson, and Teal Rothschild. "Global by the Seaside." Contexts 21, no. 2 (May 2022): 24–29. http://dx.doi.org/10.1177/15365042221107658.
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In a small coastal vacation community heavily dependent upon foreign workers, in-depth interviews with employers, participant observations, and an analysis of social artifacts evidence patterns of neo-assimilation, in the form of fused cuisine on menus, altered attitudes towards native-born workers among employers, and in a small number of cases, intermarriage. Findings also illustrate employer engagement with the culture of their workers and a sophisticated understanding of the global dynamics of international migration and work.
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Lillo-Saavedra, Mario, Consuelo Gonzalo, and Octavio Lagos. "Toward reduction of artifacts in fused images." International Journal of Applied Earth Observation and Geoinformation 13, no. 3 (June 2011): 368–75. http://dx.doi.org/10.1016/j.jag.2011.01.001.
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Seidl-Fox, Susanna. "Salzburg Global Seminar: Achieving the Freer Circulation of Cultural Artifacts (Session 453, May 9–14, 2008)." International Journal of Cultural Property 16, no. 4 (November 2009): 411–13. http://dx.doi.org/10.1017/s0940739109990361.
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From May 9–14, 2008, the Salzburg Global Seminar convened its 453rd session—and its annual arts and culture session—on “Achieving the Freer Circulation of Cultural Artifacts” at Schloss Leopoldskron in Salzburg. Sixty two participants from twenty-nine countries gathered for the five-day session, aimed at building consensus among cultural authorities and museum representatives from around the world on ways to overcome legal, political, and practical obstacles to the circulation of cultural objects. Participants worked together to identify and assess new and better ways to promote the sharing of art and artifacts—from virtual access to practical strategies for significantly expanding loan programs worldwide. Whereas there are many museum conferences worldwide, few strive to bring together a multi-disciplinary and truly global group of participants for an open, informal exchange of thoughts and ideas in a neutral setting. The gathering in Salzburg, generously supported by The Edward T. Cone Foundation, succeeded in providing an evaluative international forum of this type, which brought diverse experts from a range of national and professional contexts into dialogue and gave them the opportunity to reflect deeply and openly on ways to increase the international exchange of cultural artifacts.
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Peterson, Marcia. "The 2015 Table Mountain Ice Patch Project: Grand Teton National Park, Teton County, WY." UW National Parks Service Research Station Annual Reports 38 (January 1, 2015): 112–19. http://dx.doi.org/10.13001/uwnpsrc.2015.4107.
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Ice patches are permanent snow and ice fields that survive through the summer months but are not massive enough to become glaciers. Prehistorically, people used ice patches for hunting, and organic hunting-related artifacts have been recovered from them. As a result of global warming, the ice patches are melting and exposing artifacts and other material that were preserved under the ice for millennia. Once exposed, the organic artifacts deteriorate. Recovery of these artifacts before they are lost is critical to understanding the paleoecology of and the prehistoric people who used the Teton high elevations (Lee 2009, 2015). In 2015, I surveyed ice patches on Table Mountain pursuant to Section 110 of the National Historic Preservation Act. The work was conducted under OWSA permits 15-GRTE-01 and GRTE-2015-SCI-0040 and was partially funded by the UW-NPS Research Station. One historic archaeological site (48TE1983) was documented and four paleobiological specimens were collected.
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Rhodes, Rachael H., Xavier Faïn, Edward J. Brook, Joseph R. McConnell, Olivia J. Maselli, Michael Sigl, Jon Edwards, et al. "Local artifacts in ice core methane records caused by layered bubble trapping and in situ production: a multi-site investigation." Climate of the Past 12, no. 4 (April 26, 2016): 1061–77. http://dx.doi.org/10.5194/cp-12-1061-2016.
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Abstract. Advances in trace gas analysis allow localised, non-atmospheric features to be resolved in ice cores, superimposed on the coherent atmospheric signal. These high-frequency signals could not have survived the low-pass filter effect that gas diffusion in the firn exerts on the atmospheric history and therefore do not result from changes in the atmospheric composition at the ice sheet surface. Using continuous methane (CH4) records obtained from five polar ice cores, we characterise these non-atmospheric signals and explore their origin. Isolated samples, enriched in CH4 in the Tunu13 (Greenland) record are linked to the presence of melt layers. Melting can enrich the methane concentration due to a solubility effect, but we find that an additional in situ process is required to generate the full magnitude of these anomalies. Furthermore, in all the ice cores studied there is evidence of reproducible, decimetre-scale CH4 variability. Through a series of tests, we demonstrate that this is an artifact of layered bubble trapping in a heterogeneous-density firn column; we use the term “trapping signal” for this phenomenon. The peak-to-peak amplitude of the trapping signal is typically 5 ppb, but may exceed 40 ppb. Signal magnitude increases with atmospheric CH4 growth rate and seasonal density contrast, and decreases with accumulation rate. Significant annual periodicity is present in the CH4 variability of two Greenland ice cores, suggesting that layered gas trapping at these sites is controlled by regular, seasonal variations in the physical properties of the firn. Future analytical campaigns should anticipate high-frequency artifacts at high-melt ice core sites or during time periods with high atmospheric CH4 growth rate in order to avoid misinterpretation of such features as past changes in atmospheric composition.
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Lee, Chee Hye. "Becoming Global Citizens through Global Literature: A Case Study of English Teacher Candidates in Korea." English Teachers Association in Korea 28, no. 4 (December 31, 2022): 23–46. http://dx.doi.org/10.35828/etak.2022.28.4.23.
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This study investigates the ways in which English teacher candidates in Korea can cultivate global citizenship through reading and responding to global literature. While reading Kashmira Sheth’s Keeping Corner, a story of a young Indian girl navigating her life as a widow, they were invited to build their own intercultural understanding through participating in various critical literacy activities. Employing a qualitative research method, this study analyzes the texts that they produced during the class. The findings reveal that through self-reflexivity they were able to move beyond a surfacelevel conceptualization of culture usually represented as specific artifacts or traditional practices and then recognize the dynamic factors that play a role in constructing their cultural identities. In addition, they were able to make personal, local, and global relevance and significance and thereby identify some issues that local and global communities are currently facing. Although many raised their awareness on global citizenship by deconstructing the self-other dichotomy and recognizing multifaceted aspects of one’s lived experience, the study also identifies some challenges in unraveling deeply rooted ideologies and superiority, as well as apathy toward local and global relevance and significance in a one-semester course. Finally, this study calls for more integration of global citizenship education into teacher education programs.
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Karl, T. R., A. Arguez, B. Huang, J. H. Lawrimore, J. R. McMahon, M. J. Menne, T. C. Peterson, R. S. Vose, and H. M. Zhang. "Possible artifacts of data biases in the recent global surface warming hiatus." Science 348, no. 6242 (June 4, 2015): 1469–72. http://dx.doi.org/10.1126/science.aaa5632.
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Darcy, Jean. "“Building a Sense of Global Identity through Artifacts in Freshman Composition Classrooms”." HETS Online Journal 4, no. 1 (November 30, 2013): 15–25. http://dx.doi.org/10.55420/2693.9193.v4.n1.144.
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Queensborough Community College, part of the City University of New York, is an Hispanic serving institution with 26% Hispanic population. Students learn alongside students from 143countries bringing language experience in Spanish, French, Urdu, Hindi, Punjabi, Chinese, Pushto, and Farsi. We are preparing our students for a future in which information networks are readily available, situating our students in a global search engine. In addition, increasingly our students come into academic communities with transnational identities. This requires that our students be prepared to create connections, to synthesize identity and information in a way that facilitates the bonds of relations that create coherences and communities. Broad based networks rely on deep, personal abilities to both present ourselves and understand others in technological environments. Our colleges welcome students from around the world into new learning spaces to join in learning experiences that must also connect to authentic meaning making that is rooted in communities of origin at the same time that those origins are incorporated into an understanding of a future self in a new space.
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Norris, Joel R., and Amato T. Evan. "Empirical Removal of Artifacts from the ISCCP and PATMOS-x Satellite Cloud Records." Journal of Atmospheric and Oceanic Technology 32, no. 4 (April 2015): 691–702. http://dx.doi.org/10.1175/jtech-d-14-00058.1.
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AbstractThe International Satellite Cloud Climatology Project (ISCCP) dataset and the Pathfinder Atmospheres–Extended (PATMOS-x) dataset are two commonly used multidecadal satellite cloud records. Because they are constructed from weather satellite measurements lacking long-term stability, ISCCP and PATMOS-x suffer from artifacts that inhibit their use for investigating cloud changes over recent decades. The present study describes and applies a post hoc method to empirically remove spurious variability from anomalies in total cloud fraction at each grid box. Spurious variability removed includes that associated with systematic changes in satellite zenith angle, drifts in satellite equatorial crossing time, and unrealistic large-scale spatially coherent anomalies associated with known and unidentified problems in instrument calibration and ancillary data. The basic method is to calculate for each grid box the least squares best-fit line between cloud anomalies and artifact factor anomalies, and to let the residuals from the best-fit line be the newly corrected data. After the correction procedure, the patterns of regional trends in ISCCP and PATMOS-x total cloud fraction appear much more natural. The corrected data cannot be used for studies of globally averaged cloud change, however, because the methods employed remove any real cloud variability occurring on global scales together with spurious variability. An examination of Moderate Resolution Imaging Spectroradiometer (MODIS) total cloud fraction data indicates that removing global-scale variability has little impact on regional patterns of cloud change. Corrected ISCCP and PATMOS-x data are available from the Research Data Archive at NCAR.
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De Lissovoy, Noah, Venkat Ramaprasad, Stacia Cedillo, and Courtney B. Cook. "Scripted Fantasies and Innovative Orientalisms: Media, Youth, and Ideology in the Age of the “War on Terror”." Cultural Studies ↔ Critical Methodologies 17, no. 6 (October 12, 2016): 442–56. http://dx.doi.org/10.1177/1532708616673653.
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Anxieties associated with global conflict surround youth and ideological narratives mediating these conflicts can be seen in the popular media youth consume. This investigation uses contemporary cultural-theoretical conceptualizations of ideology to analyze several important popular screen-based cultural artifacts created for youth consumption to determine how young audiences are invited into the ideoscapes and discourses of global politics in the age of the “war on terror.” The analysis shows that these youth-oriented media artifacts script fundamental understandings of conflict and provide schema in which young viewers can orient themselves in relation to global Others, while also setting the matrix of intelligibility within which global politics itself becomes coherent. In addition, these popular cultural texts undertake an innovation of familiar Orientalisms, inviting young people to identify with an aggressive defense of the West and serving as an ideological support for the United States in the context of ongoing global conflicts.
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Zhu, Hongyu, Deli Wang, and Lingxiang Li. "Full-Wavefield Migration Using an Imaging Condition of Global Normalization Multi-Order Wavefields: Application to a Synthetic Dataset." Applied Sciences 14, no. 4 (February 8, 2024): 1389. http://dx.doi.org/10.3390/app14041389.
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In marine seismic exploration, seismic signals comprise primaries that undergo first-order scattering, as well as multiples resulting from multi-order scattering events. Surface-related multiples involve multi-order scattering at the free surface interface between seawater and air and exhibit a smaller reflection angle and broader illumination compared to primaries. Internal multiples, originating from multi-order scattering among stratified layers, provide additional illumination compensation beneath the reflecting interface. However, in conventional primary migration, different-order wavefields may result in crosstalk artifacts. To address this issue, we developed a least-squares migration (LSM) method based on the multi-order wavefield global normalization condition. This methodology investigates the illumination effects and crosstalk artifacts associated with different-order surface-related and internal multiples, and then modifies the global normalization condition by incorporating an illumination compensation perspective. Virtual sources, represented by surface-related multiples and internal multiples, are integrated into the source compensation term, ultimately yielding a multi-order wavefield normalization condition. This normalization condition is subsequently combined with least-squares full-wavefield migration (LSFWM). Numerical experiments demonstrate that the normalization condition of multi-order wavefields can resolve the problem of weak deep imaging energy and promote the suppression of multiple crosstalk artifacts in the least-squares algorithm.
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Lesage, Camille, Alvise Barbieri, Jovan Galfi, Dragan Jovanović, and Vera Bogosavljević Petrović. "The Becoming of a Prehistoric Landscape: Palaeolithic Occupations and Geomorphological Processes at Lojanik (Serbia)." Land 11, no. 12 (December 14, 2022): 2292. http://dx.doi.org/10.3390/land11122292.
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Accomplishing long-term plans to harvest and modify natural resources has been a crucial skill for the survival of our species since early Prehistory. Research on this first step of production mostly focuses on the provenience study of lithic artifacts uncovered at archaeological sites, using petrographic and geochemical analyses to correlate the artifacts with potential geological outcrops. Although fundamental for understanding key aspects of landscape use and mobility, regional raw material economy, and extraction technology, Palaeolithic raw material sources have been less intensively investigated, as they are often difficult to locate and challenging to tackle with traditional archaeological approaches. Lojanik in the Central Balkans is one of the largest Prehistoric quarrying areas known in Europe, showing numerous lithic raw material outcrops exploited from the Middle Palaeolithic to the Chalcolithic periods, over an area of 18 hectares. In this paper, we present the results from our renewed research program in this region. Combining airborne LIDAR mapping, geomorphological and archaeological survey, and techno-typological analysis of lithic artifacts, we were able to reconstruct the geomorphological evolution of the landscape and its use by prehistoric societies.
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Nissinen, Saara, Petteri Vanninen, Henriikka Vartiainen, Petteri Vanninen, Sinikka Pöllänen, and Sirpa Kokko. "How to shoe an elk? Teachers’ reflections on creating a glocal learning community." Research and Practice in Technology Enhanced Learning 20 (April 30, 2024): 004. http://dx.doi.org/10.58459/rptel.2025.20004.
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This design-based case study aimed to depict how teachers facilitate and experience the design-oriented process of creating and teaching in a glocal learning network. The participants in this case study were volunteer teachers from Finland and the United States who designed and implemented glocally-relevant learning projects together with their students. The qualitative data consisted of teachers’ interviews supplemented with project reports and students’ digital artifacts. The deductive content analysis indicates that the enabling of the glocal community and utilizing technology supported the creation of interest-driven inquiries and reciprocal connections with peers and external expertise. While the teachers perceived how the students could develop novel skills and connections in glocally-networked activities, an apparent need to develop the collaboration between the teachers and the global peers was also recognized.
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Duester, Emma, Michal Teague, and Ondris Pui. "Photogrammetry for Digitization and Digital Display as a Sustainable Way to Develop Vietnam’s Museum Sector?" Studies in Digital Heritage 7, no. 1 (September 19, 2023): 68–90. http://dx.doi.org/10.14434/sdh.v7i1.35960.
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This paper explores how photogrammetry and free, open-source software can be used to sustainably develop museum sector capacity to digitize and publish Vietnam’s cultural heritage online. This approach was developed and applied during a digitization project as a solution to overcome challenges experienced in Vietnam concerning a lack of human, technical and financial resources. This paper draws on findings from a co-designed action research project between RMIT University Vietnam (RMIT) and the Vietnamese Women’s Museum (VWM) that developed an approach to create 3D (3 Dimensional) digital artifacts of their Betel Nut Collection using free, open-source software and applying the technique of photogrammetry. The aim was to co-design and co-produce a sustainable solution focused on readily available and easy-to-use digital technologies. However, not all artifacts could be digitized using this method, which sheds light on the challenges and opportunities of digitizing cultural heritage in the Global South. Overall, this sustainable approach can be applied by other museums and cultural institutions and can be a way to empower museums in the Global South to digitize and digitally display cultural heritage artifacts.
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Kamba, Nobuyuki, Hiroshi Wada, Masahiko Tsukada, Yoshihiro Takagi, and Ken Imakita. "MEASUREMENT AND ANALYSIS OF THE GLOBAL TRANSPORT ENVIRONMENT FOR PACKING CASES FOR ARTIFACTS." Studies in Conservation 53, sup1 (January 2008): 60–63. http://dx.doi.org/10.1179/sic.2008.53.supplement-1.60.
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Wang, Zheng, and Gang He. "Multi-Frame Content-Aware Mapping Network for Standard-Dynamic-Range to High-Dynamic-Range Television Artifact Removal." Sensors 24, no. 1 (January 4, 2024): 299. http://dx.doi.org/10.3390/s24010299.
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Recently, advancements in image sensor technology have paved the way for the proliferation of high-dynamic-range television (HDRTV). Consequently, there has been a surge in demand for the conversion of standard-dynamic-range television (SDRTV) to HDRTV, especially due to the dearth of native HDRTV content. However, since SDRTV often comes with video encoding artifacts, SDRTV to HDRTV conversion often amplifies these encoding artifacts, thereby reducing the visual quality of the output video. To solve this problem, this paper proposes a multi-frame content-aware mapping network (MCMN), aiming to improve the performance of conversion from low-quality SDRTV to high-quality HDRTV. Specifically, we utilize the temporal spatial characteristics of videos to design a content-aware temporal spatial alignment module for the initial alignment of video features. In the feature prior extraction stage, we innovatively propose a hybrid prior extraction module, including cross-temporal priors, local spatial priors, and global spatial prior extraction. Finally, we design a temporal spatial transformation module to generate an improved tone mapping result. From time to space, from local to global, our method makes full use of multi-frame information to perform inverse tone mapping of single-frame images, while it is also able to better repair coding artifacts.
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Collins, J., G. Riegler, H. Schrader, and M. Tinz. "APPLYING TERRAIN AND HYDROLOGICAL EDITING TO TANDEM-X DATA TO CREATE A CONSUMER-READY WORLDDEM PRODUCT." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-7/W3 (April 30, 2015): 1149–54. http://dx.doi.org/10.5194/isprsarchives-xl-7-w3-1149-2015.
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The Geo-intelligence division of Airbus Defence and Space and the German Aerospace Center (DLR) have partnered to produce the first fully global, high-accuracy Digital Surface Model (DSM) using SAR data from the twin satellite constellation: TerraSAR-X and TanDEM-X. The DLR is responsible for the processing and distribution of the TanDEM-X elevation model for the world’s scientific community, while Airbus DS is responsible for the commercial production and distribution of the data, under the brand name WorldDEM™. <br><br> For the provision of a consumer-ready product, Airbus DS undertakes several steps to reduce the effect of radar-specific artifacts in the WorldDEM data. These artifacts can be divided into two categories: terrain and hydrological. Airbus DS has developed proprietary software and processes to detect and correct these artifacts in the most efficient manner. Some processes are fullyautomatic, while others require manual or semi-automatic control by operators.
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Chen, Yangkang, Hanming Chen, Kui Xiang, and Xiaohong Chen. "Preserving the discontinuities in least-squares reverse time migration of simultaneous-source data." GEOPHYSICS 82, no. 3 (May 1, 2017): S185—S196. http://dx.doi.org/10.1190/geo2016-0456.1.
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The simultaneous-source shooting technique can accelerate field acquisition and improve spatial sampling but it will cause strong interferences in the recorded data and artifacts in the final image. The previously proposed structural smoothing operator can effectively attenuate artifacts for relatively simple reflection structures during least-squares inversion, but it will cause damage to complicated reflection events such as discontinuities. To preserve discontinuities in a seismic image, we apply the singular spectrum analysis (SSA) operator to attenuate artifacts during least-squares inversion. Considering that global SSA cannot deal with overcomplicated data very well, we use local SSA to remove noise and to better preserve the steeply dipping components. The local SSA operator corresponds to a local low-rank constraint applied in the inversion process. The migration operator used in the study is the reverse time migration (RTM) operator. Tests using the Marmousi model showed the superior performance of the proposed algorithm in preserving the discontinuities of seismic images.
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Zhang, Junbao, and Guohua Liu. "The Adaptation of a Model of an Artifact-Centric Business Process Instance and Its Validation." Information 10, no. 2 (February 11, 2019): 57. http://dx.doi.org/10.3390/info10020057.
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The adaptability of an in-progress business process is an essential requirement for any business process management system in dynamic business process environments. Over the last two decades, the artifact-centric approach for business process management has been evidenced to have higher level of flexibility. However, the adaptation of a model of an artifact-centric business process instance is still inevitable and pervasive due to the complex and ever-changing business environments. Almost all works of artifact-centric business process neglect this issue. To fill this gap, we propose a special business rule called adaptation rule to address the dynamic adaptation problem and describe the adaptation by a global adaptation model. Moreover, we provide a validation mechanism over our proposed adaptation rule of the global adaptation model to guarantee the behavior correctness of the adaptation. Through this validation approach, computing the lifecycle of the global adaptation model can be avoided.
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Panaou, Petros. "Engaging the Social Imagination in the College Classroom Through Radiant Readings of Global Picturebooks." Journal of Literary Education, no. 4 (July 31, 2021): 151. http://dx.doi.org/10.7203/jle.4.21027.
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Building on Kelly Wissman’s (2019) work, the article describes and analyzes artifacts from the author’s college children’s literature class, during which students read radiantly: in ways that may take them outside of themselves, their realities, and points of view, “like rays emitting from the sun, to seek out alternative perspectives, new directions, and unique pathways” (p. 16). The analysis of these collected student artifacts is guided by Wissman’s understanding of the social imagination as the capacity of a reader to imagine “the thoughts, feelings, and experiences of others” as well as “to invent visions of what should be and what might be” (p. 15). It also builds on the theoretical framework developed by Kathy Short (2019) in relation to the social responsibility that needs to be practiced and cultivated by those involved in the creating, teaching, and reading of global children’s literature. Nurturing reading as an act of creativity and fostering dialogic inquiry around global picturebooks is shown to be quite effective in engaging college students’ social imagination. The author brings evidence from the prompts and artifacts that supports this effectiveness, demonstrating the different ways in which students were able to read Two White Rabbits (2015) and The Arrival (2007) radiantly. The prompts that were designed for these immigration-themed picturebooks were successful in nurturing reading as an act of creativity and fostering dialogic inquiry, and thus succeeded in engaging the students’ social imagination. A main reason behind their success was that, by design, they required readers to use their imagination and creativity as well as pay close attention to the picturebooks’ visual aesthetics in order to fill in the gaps. Another important reason behind the students’ radiant readings was the selection of these specific picturebooks, which fit Jessica Whitelaw’s (2017) definition of disquieting picturebooks as they encourage their readers to embrace unfamiliarity and discomfort.
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Hou, S., J. Chappellaz, D. Raynaud, V. Masson-Delmotte, J. Jouzel, P. Bousquet, and D. Hauglustaine. "A new Himalayan ice core CH<sub>4</sub> record: possible hints at the preindustrial latitudinal gradient." Climate of the Past 9, no. 6 (November 8, 2013): 2549–54. http://dx.doi.org/10.5194/cp-9-2549-2013.
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Abstract. Two ice cores recovered from the Himalayan East Rongbuk (ER) Glacier on the northeast saddle of Mt. Qomolangma (Everest) (28°01' N, 86°58' E, 6518 m above sea level) give access to a tentative record of past Himalayan atmospheric mixing ratio of CH4 spanning the past 1200 yr. The major part of the record is affected by artifacts probably due to in situ production. After selecting what may represent the true atmospheric mixing ratio, an average of 749 ± 25 ppbv of CH4 is estimated for the late preindustrial Holocene, which is ~ 36 ± 17 (~ 73 ± 18) ppbv higher than the atmospheric levels recorded in the Greenland (Antarctic) ice cores. A comparison of these new data with model simulations of the CH4 latitudinal gradient suggests either that the models do not get a correct balance between high and low latitude CH4 sources, or that the filtered CH4 profile from the ER cores remains biased by small artifacts.
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Franzia, Elda. "Cultural Wisdom of Minangkabau Ethnic Community for Local – Global Virtual Identity." Mediterranean Journal of Social Sciences 8, no. 1 (January 26, 2017): 325–29. http://dx.doi.org/10.5901/mjss.2017.v8n1p325.
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Abstract The development of digital technology is extending the opportunity to create a new identity of society. Digital technology enables cultural experience across boundaries, to new places of virtual world. Virtual identity functions as main differentiator of personal account in social media. It represents a personal being in virtual world. It also functions as a sign to culture and life’s value of the person behind an account. This paper discussed about the virtual identity use by the Minangkabau ethnic’s people in Facebook. Iconic artifacts of Minangkabau use in profile picture of the social media. Those artifacts valued with Minangkabau’s cultural wisdom. The approach use for this research is cultural studies, with the semiotic method use to search the relation between the image and the cultural wisdom representation of Minangkabau. The visual data collected by capturing profile picture in Facebook. The image analyzed as everyday symbolic and expressive practice and form of Minangkabau ethnic’s people. The picture is the iconic sign resembles to its conceptual object in certain ways. The result is the understanding of how profile picture function as indirect visual communication of local - global identity of Minangkabau ethnic people. The message convey in virtual identity relates the account and others in cyberspace.