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Journal articles on the topic 'Block movw'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Sun, Yu, Rongrong Ni, and Yao Zhao. "Nonoverlapping Blocks Based Copy-Move Forgery Detection." Security and Communication Networks 2018 (2018): 1–11. http://dx.doi.org/10.1155/2018/1301290.

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In order to solve the problem of high computational complexity in block-based methods for copy-move forgery detection, we divide image into texture part and smooth part to deal with them separately. Keypoints are extracted and matched in texture regions. Instead of using all the overlapping blocks, we use nonoverlapping blocks as candidates in smooth regions. Clustering blocks with similar color into a group can be regarded as a preprocessing operation. To avoid mismatching due to misalignment, we update candidate blocks by registration before projecting them into hash space. In this way, we can reduce computational complexity and improve the accuracy of matching at the same time. Experimental results show that the proposed method achieves better performance via comparing with the state-of-the-art copy-move forgery detection algorithms and exhibits robustness against JPEG compression, rotation, and scaling.

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SZKUTNIK, JACEK, and KRZYSZTOF KUŁAKOWSKI. "GENERALIZED SYNCHRONIZATION AND MEMORY EFFECT IN THE BURRIDGE–KNOPOFF SYSTEM OF THREE BLOCKS." International Journal of Modern Physics C 15, no. 05 (June 2004): 629–36. http://dx.doi.org/10.1142/s0129183104006091.

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Recently, synchronization in the Burridge–Knopoff model has been found to depend on the initial conditions. Here we report the existence of three modes of oscillations of the system of three blocks. In one of the modes, two lateral blocks are synchronized. In the second mode, the central block moves with almost constant velocity, i.e., it does not stick. Two lateral blocks do stick and they move in opposite phases. In the third mode, the blocks oscillate with aperiodic amplitude. The lateral blocks move in opposite phases and their frequency is lower than the one for the central block. The mode selected by the system depends on the initial conditions. Numerical results indicate that there is no modes in the phase space.

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Zhang, Rui Fang, Han Min Ye, Zi Hang Song, and Min Wang. "Blind Detection of Copy-Move Forgery in Digital Images Based on Dyadic Wavelet Transform." Advanced Materials Research 989-994 (July 2014): 4127–31. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.4127.

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This paper proposed a detection algorithm for copy-move in same image based on dyadic wavelet transform. First of all, four sub images could be got through the decomposition of detecting image by dyadic wavelet transform. Secondly, high-frequency and low-frequency sub image were decomposed into blocks without any overlap and two sub image’s dyadic wavelet coefficients were regarded as the eigenvalue of the image block. At Last, both the high similarity among the low-frequency sub image blocks and the low similarity among the high-frequency sub image blocks were selected as a distorted image block. A kind of image edge processing methods was used to improve the tampering region at the same time. Through the experiments, it shows that the algorithm got the higher detection rate and lower error rates.

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Arora, Priyanka, and Derminder Singh. "Copy Move Image Forgery Detection with Exact Match Block Based Technique." Oriental journal of computer science and technology 12, Issue 3 (July 29, 2019): 123–31. http://dx.doi.org/10.13005/ojcst12.03.07.

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Digital images are a momentous part of today’s digital communication. It is very easy to manipulate digital images for hiding some useful information by image rendering tools such as Adobe Photoshop, Microsoft Paint etc. The common image forgery which is easy to carry out is copy-move in which some part of an image is copied and pasted on another part of the same image to hide the important information. In this paper we propose an algorithm to spot the copy-move forgery based on exact match block based technique. The algorithm works by matching the regions in image that are equivalent by matching the small blocks of size b b. The program is tested for 45 images of mixed image file formats by considering block sizes 2, 4, 6, 8, 10, 12, 14, and 16. It is observed from the experimental results that the proposed algorithm can detect copy-move image forgery in TIF, BMP and PNG image formats only. Results reveal that as the block size increases, execution time (time taken by CPU to display output) also increases but the number of detected forged images increases till block size 10 and attains saturation thereafter. Consequently block size should be set to 10 for getting good results in terms of less execution time.

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Yoshida, R. T., and J. Krahn. "Movement and stability analysis of the Beaver Creek landslide, Saskatchewan, Canada." Canadian Geotechnical Journal 22, no. 3 (August 1, 1985): 277–85. http://dx.doi.org/10.1139/t85-041.

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This paper presents a case history of a multiblock landslide where the blocks move at varying rates along a common horizontal slip surface which follows the contact between stratified drift and underlying till. Movement measurements indicate that the blocks towards the toe move at a higher rate than blocks towards the scarp. Stability analyses show that the entire slide mass can be analyzed as a single unit as opposed to considering each block separately. This finding is compared with the analysis of other multiblock slides. The friction angle mobilized along the horizontal slip surface falls within the range of residual values measured in the laboratory. Key words: landslides, stability, analysis, translational slides, residual strength.

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Freudenberger, Jürgen, Mohammed Rajab, Daniel Rohweder, and Malek Safieh. "A Codec Architecture for the Compression of Short Data Blocks." Journal of Circuits, Systems and Computers 27, no. 02 (September 11, 2017): 1850019. http://dx.doi.org/10.1142/s0218126618500196.

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This work proposes a lossless data compression algorithm for short data blocks. The proposed compression scheme combines a modified move-to-front algorithm with Huffman coding. This algorithm is applicable in storage systems where the data compression is performed on block level with short block sizes, in particular, in non-volatile memories. For block sizes in the range of 1[Formula: see text]kB, it provides a compression gain comparable to the Lempel–Ziv–Welch algorithm. Moreover, encoder and decoder architectures are proposed that have low memory requirements and provide fast data encoding and decoding.

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SZKUTNIK, J., and K. KUŁAKOWSKI. "CHAOS IN PIECEWISELY INTEGRABLE TRAIN MODEL FOR TWO BLOCKS." International Journal of Modern Physics C 13, no. 01 (January 2002): 41–48. http://dx.doi.org/10.1142/s0129183102002924.

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The train model of two blocks with stick-slip dynamics (M. de Sousa Vieira, 1995) is believed to be the simplest spring-block system, which displays chaos. Here we simplify it even more by linearizing the velocity dependence of the friction force. In this way, the nonlinearity of the equations of motion is reduced to the time moments, when a block starts to move or stops, and when the analytical solutions are to be sewn together. We demonstrate, that for small values of the velocity of blocks, the character of motion is not changed. This is observed on the bifurcation diagrams, the Lyapunov exponents, the phase portraits and the power spectra.

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Ther, Tamás, and László P. Kollár. "Dynamical similarity of multi-block catenary arches and rocking blocks subjected to horizontal base excitation." Nonlinear Dynamics 104, no. 3 (April 10, 2021): 2099–116. http://dx.doi.org/10.1007/s11071-021-06415-1.

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AbstractIn this paper, the dynamical similarity of multi-block catenary arches and columns is discussed, which can be used for the simplified design of rocking arches. The basic hypothesis is that the dynamic response of multi-block arches and columns is similar when the shape of the arch follows the thrust line, i.e. it is a catenary arch. It is validated numerically that the responses of slender catenary arches are safe and reliable approximations of those of not slender arches and then that the overturning acceleration (response) spectra of rigid, slender monolithic blocks can be directly applied for catenary arches. The similarity is based on two parameters, on the limit peak ground acceleration (under which the structure will not move at all) and on the frequency parameter (defined by Housner for rigid blocks).

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9

Rony Sina, Derwin, and Agus Harjoko. "Deteksi Copy Move Forgery Pada Citra Menggunakan Exact Match, DWT Haar dan Daubechies." IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) 6, no. 1 (April 30, 2016): 25. http://dx.doi.org/10.22146/ijeis.10768.

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AbstrakCopy-Move Forgery adalah satu tipe gangguan citra digital, di mana bagian dari citra dicopy dan dipastekan ke bagian lain dalam citra yang sama untuk menutupi fitur citra yang penting. Pada penelitian ini, dibangun sistem pendeteksi copy move forgery pada citra. Sistem ini dimaksudkan untuk membantu user mengetahui bahwa suatu citra masih asli atau sudah terdapat copy move dan dibagian mana terjadinya copy move tersebut. Sistem ini dibangun dengan menggunakan metode Exact Match, DWT Haar, DWT DB2 dan DWT DB4 dengan menggunakan blok 4 x 4, 8 x 8 dan 16 x 16. Masukan dari sistem ini berupa citra input dan juga ukuran blok . Keluaran dari sistem ini adalah daerah yang terdeteksi sebagai copy move atau tidak terdeteksi sama sekali beserta dengan daerah yang di duga sebagai false match.Hasil akhir dari sistim ini ditunjukkan dalam bentuk akurasi, area false match dan waktu ekseukusi. Akurasi metode Exact Match untuk blok 4 x 4, 8 x 8 dan 16 x 16 adalah lebih baik dibandingkan dengan DWT walaupun memiliki area false match yang lebih besar. Akurasi dari DWT Haar, DWT db2 dan DWT db4 tergantung dari wilayah atau daerah copy move dalam citra. Blok 4 x 4 mempunyai area false match yang lebih besar dari blok 8 x 8 dan 16 x 16. Waktu eksekusi tergantung dari besar blok, semakin besar blok semakin besar waktu eksekusi.Kata kunci—copy move forgery, Exact Match, DWT Haar, DWT DB2, DWT DB4. AbstractCopy-Move Forgery is a special type of image forgery, in which a part of a digital image is copied and pasted to another part in the same image in order to cover an important image feature. This research developed a system to detect copy move forgery in digital image. The system is intended to help the user determine whether an image is authentic or already contained a copy move object, and if the image already contains copy move object, the system can determine in which section the copy move object is located. Copy move forgery detection system discussed in this research, was developed by using Exact Match, DWT Haar, DWT db2 and DWT db4 using blocks of 4 x 4, 8 x 8 and 16 x 16. Users can use the system by using the digital image as input. The output of the system is the information about the area detected as a copy move forgery along with areas suspected of being false match.The final result is shown in the form of accuracy, the area of the false match and execution time. Based on the test results, the accuracy of Exact Match method for blocks of 4 x 4, 8 x 8 and 16 x 16 is better than the DWT, although exact match have an bigger false match area. Accuracy of DWT Haar, DWT db2 and DWT DB4 depending on the copy move area on the image. Block 4 x 4 has a false match area larger than the block 8 x 8 and 16 x 16. The execution time depends on the size of the block, the larger the block, the longer the time of execution. Keywords— Copy move forgery, Exact Match, DWT Haar, DWT db2, DWT db4

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Acham, Christine. "Black, White, and in Color: Television and Black Civil Rights (review)." Moving Image 5, no. 1 (2005): 153–56. http://dx.doi.org/10.1353/mov.2005.0001.

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Popovic, Mirjana, Vladimir Kostic, Eleonora Dzoljic, and Marko Ercegovac. "A rapid method of detecting motor blocks in patients with Parkinson's disease during volitional hand movements." Srpski arhiv za celokupno lekarstvo 130, no. 11-12 (2002): 376–81. http://dx.doi.org/10.2298/sarh0212376p.

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INTRODUCTION An algorithm to study hand movements in patients with Parkinson's disease (PD) who experience temporary, involuntary inability to move a hand have been developed. In literature, this rather enigmatic phenomenon has been described in gait, speech, handwriting and tapping, and noted as motor blocks (MB) or freezing episodes. Freezing refers to transient periods in which the voluntary motor activity being attempted by an individual is paused. It is a sudden, unplanned state of immobility that appears to arise from deficits in initiating or simultaneously and sequentially executing movements, in correcting inappropriate movements or in planning movements. The clinical evaluation of motor blocks is difficult because of a variability both within and between individuals and relationship of blocks to time of drug ingestion. In literature the terms freezing, motor block or motor freezing are used in parallel. AIM In clinical settings classical manifestations of Parkinson's Disease (akinesia bradykinesia, rigidity, tremor, axial motor performance and postural instability) are typically evaluated. Recently, in literature, new computerized methods are suggested for their objective assessment. We propose monitoring of motor blocks during hand movements to be integrated. For this purpose we have developed a simple method that comprises PC computer, digitizing board and custom made software. Movement analysis is "off line", and the result is the data that describe the number, duration and onset of motor blocks. METHOD Hand trajectories are assessed during simple volitional self paced point-to-point planar hand movement by cordless magnetic mouse on a digitizing board (Drawing board III, 305 x 457 mm, GTCO Cal Comp Inc), Fig. 1. Testing included 8 Parkinsonian patients and 8 normal healthy controls, age matched, with unknown neurologic motor or sensory disorders, Table 1. Three kinematic indicators of motor blocks: 1) duration (MBTJ; 2) onset (t%); and 3) number (N) of MB episodes, allow identification and quantification of motor blocks. Duration of motor blocks (MVT) is defined as the time sequence when (x,y) coordinates do not change their values and is expressed in percentage from the whole movement duration MBT% = MBT/T (%). If during some movements more than one motor block occurs (N > 1) then this movement is decomposed. The whole movement motor block (mbt) is the sum of all motor blocks MVT,; during the same movement and expressed in percentage from the whole movement duration mbt%= tYJa (%). The onset of motor block (t) is determined with the beginning of motor block and expressed in percentage from the whole move- ment duration: t% = t/T (%). After the determination of kinematic indicators of motor blocks (MVT, N, t) for healthy controls, their mean values are calculated. Statistical package ANOVA is applied to determine statistical significance of the difference between PD patients and mean values from age matched control healthy group. PD patients are then classified into two groups: one group consisting of PD patients with motor blocks and the other without motor blocks, similar to healthy controls. RESULTS Acquired movements are processed and analyzed. Fig. 2 is an example of hand trajectories. Time course of (x, y) coordinates indicates motor block appearance, Fig.3. Detailed presentation of kinematic indicators of motor block (MVT, N, t) is in Fig. 4. Intra-subject variability of these parameters is presented in Figs 5, 6 and 7 for patient #3. The results for N show that 45% of all patients #3 movements had none motor blocks (N = 0); 20% had N = 1; 15% had N = 2; 11.5% had N = 3; 5.7% had N = 4; 0.3 % had N = 5; 0.7% had N = 6; 0.3 % had N = 7 and 1% had N = 8 motor blocks. The results for t% show that 3% of all patients' #3 blocks started at first quarter, 17% started in the second, 36% in the third, and 44% in the last quarter of movement. The results for MBT% show that 14.5% of all movements had MBT% in the range 0-5%; 56% had MBT% 5-10%; 22% had MBT% 10-15%; 5.5% had MBT% 15-20?% and 2% had MBT% 20-25%. No block lasted more than 25% from the whole movement duration. Table 2 is the summary of mean variability for kinematic indicators of motor block (N, mbt%, t%) and for the movement duration T during a 7 day-testing of patients #3. The analysis of calculated data for eight tested PD patients revealed a significant difference (p < 0.01) between healthy controls and three PD patients; data on five PD patients were not significantly different (ns). This method clustered 3 PD patients in the group that experience motor blocks, while the rest were in the group without their significant occurrence. DISCUSSION This algorithm is an additional instrument in classical evaluation of PD patients during their clinical evaluation and treatment. It provides to clinician a rapid feedback on the changes of voluntary hand movements in everyday progress of illness. Furthermore, this method could be of assistance for developing strategies to overcome motor blocks in arm movements at their beginning, as well as for the feedback of the success of drug therapy.

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Zimmermann, Patricia Rodden. "Revisiting and Remixing Black Cinema." Moving Image 6, no. 2 (2006): 119–24. http://dx.doi.org/10.1353/mov.2007.0019.

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Folkins, John W., and Jeanne L. Canty. "Movements of the Upper and Lower Lips during Speech." Journal of Speech, Language, and Hearing Research 29, no. 3 (September 1986): 348–56. http://dx.doi.org/10.1044/jshr.2903.356.

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Inferior-superior displacements of the upper lip, lower lip, and jaw were transduced with a strain-gauge system in 4 normal-speaking adults. Movements of the upper and lower lips were compared across conditions in which the jaw was free to move and when bite blocks were used to fix the jaw at four different vertical positions. As jaw-open position was increased with the bite blocks, it was found that: (a) Positions of both lips changed for bilabial closure, but the closing movements did not usually maintain consistent proportions between lips across different bite-block sizes; (b) although the lips maintained fairly consistent maximum interlabial opening across many conditions, this opening was reduced in the small bite-block conditions; and (c) in a few cases there was an increase in the duration of lip-closing movements, but these were small and inconsistent. The findings are discussed relative to possible organizational systems that would produce the observed interactions among speech articulators.

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McClure, Ben. "Dutch move to block French crypto laws." Computers & Security 16, no. 8 (January 1997): 678. http://dx.doi.org/10.1016/s0167-4048(97)87597-9.

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&NA;. "ADNs, COMMUNITY COLLEGES BLOCK MOVE TO BSN." AJN, American Journal of Nursing 85, no. 8 (August 1985): 923. http://dx.doi.org/10.1097/00000446-198508000-00027.

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Yeston, J. "CHEMISTRY: Blocks on the Move." Science 317, no. 5845 (September 21, 2007): 1653b. http://dx.doi.org/10.1126/science.317.5845.1653b.

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Mei, Fang, Tianchang Gao, and Yingda Lyu. "CF Model: A Coarse-to-Fine Model Based on Two-Level Local Search for Image Copy-Move Forgery Detection." Security and Communication Networks 2021 (May 4, 2021): 1–13. http://dx.doi.org/10.1155/2021/6688393.

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Copy-move forgery is the most predominant forgery technique in the field of digital image forgery. Block-based and interest-based are currently the two mainstream categories for copy-move forgery detection methods. However, block-based algorithm lacks the ability to resist affine transformation attacks, and interest point-based algorithm is limited to accurately locate the tampered region. To tackle these challenges, a coarse-to-fine model (CFM) is proposed. By extracting features, affine transformation matrix and detecting forgery regions, the localization of tampered areas from sparse to precise is realized. Specifically, in order to further exactly extract the forged regions and improve performance of the model, a two-level local search algorithm is designed in the refinement stage. In the first level, the image blocks are used as search units for feature matching, and the second level is to refine the edge of the region at pixel level. The method maintains a good balance between the complexity and effectiveness of forgery detection, and the experimental results show that it has a better detection effect than the traditional interest-based copy and move forgery detection method. In addition, CFM method has high robustness on postprocessing operations, such as scaling, rotation, noise, and JPEG compression.

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Waters, Kristin. "A Journey from Willful Ignorance to Liberal Guilt to Black Feminist Thought." Departures in Critical Qualitative Research 5, no. 3 (2016): 108–15. http://dx.doi.org/10.1525/dcqr.2016.5.3.108.

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How can white feminists productively engage with black feminist thought and practice? What are some of the excuses and stumbling blocks white feminists use and encounter that circumvent alliance with black feminists and others at the intersections of different raced and gendered realities? This essay suggests the need to further a comprehensive epistemological framework, one that distinguishes between a willful ignorance that reinforces hegemonic whiteness and the reflexivity required to move towards dismantling willful ignorance, improving knowledge projects, and creating liberatory frameworks and alliances.

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Prakash, Choudhary Shyam, and Sushila Maheshkar. "Copy-Move Forgery Detection Using DyWT." International Journal of Multimedia Data Engineering and Management 8, no. 2 (April 2017): 1–9. http://dx.doi.org/10.4018/ijmdem.2017040101.

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In this paper, we proposed a passive method for copy-move region duplication detection using dyadic wavelet transform (DyWT). DyWT is better than discrete wavelet transform (DWT) for data analysis as it is shift invariant. Initially we decompose the input image into approximation (LL1) and detail (HH1) sub-bands. Then LL1 and HH1 sub-bands are divided into overlapping sub blocks and find the similarity between the blocks. In LL1 sub-band the copied and moved blocks have high similarity rate than the HH1 sub-band, this is just because, there is noise inconsistency in the moved blocks. Then we sort the LL1 sub-band blocks pair based on high similarity and in HH1 blocks are sorted based on high dissimilarity. Then we apply threshold to get the copied moved blocks. Here we also applied some post processing operations to check the robustness of our method and we get the satisfactory results to validate the copy move forgery detection.

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YEH, LI-MING. "HOMOGENIZATION OF TWO-PHASE FLOW IN FRACTURED MEDIA." Mathematical Models and Methods in Applied Sciences 16, no. 10 (October 2006): 1627–51. http://dx.doi.org/10.1142/s0218202506001650.

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In a fractured medium, there is an interconnected system of fracture planes dividing the porous rock into a collection of matrix blocks. The fracture planes, while very thin, form paths of high permeability. Most of the fluids reside in matrix blocks, where they move very slow. Let ε denote the size ratio of the matrix blocks to the whole medium and let the width of the fracture planes and the porous block diameter be in the same order. If permeability ratio of matrix blocks to fracture planes is of order ε2, microscopic models for two-phase, incompressible, immiscible flow in fractured media converge to a dual-porosity model as ε goes to 0. If the ratio is smaller than order ε2, the microscopic models approach a single-porosity model for fracture flow. If the ratio is greater than order ε2, then microscopic models tend to another type of single-porosity model. In this work, these results will be proved by a two-scale method.

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S., Aspira, and Vikas Maheshkar. "Double Block-based Improved Copy-Move Forgery Detection." International Journal of Computer Applications 182, no. 10 (August 14, 2018): 36–44. http://dx.doi.org/10.5120/ijca2018917719.

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Sage, Leslie. "Court blocks move of Arizona telescope." Nature 375, no. 6526 (May 1995): 8. http://dx.doi.org/10.1038/375008a0.

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Hara, Tetsuya, Sigeru Miyoshi, and Petri Mähönen. "Formation Mechanism of Hierarchical Astronomical Objects in the Cosmic String Scheme." Symposium - International Astronomical Union 183 (1999): 249. http://dx.doi.org/10.1017/s0074180900132668.

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Because of the angular deficit around cosmic string, cold dark matter(CDM) gets the velocity toward the plane of moving string and wake is formed there. It means that CDM body is cut by string, two blocks move each other, and the overlapped region becomes wake. The wake and/or block size is determined by the horizon size at zi when the wake is triggered by the string. The nonlinearity and/or thickness of the wake depends on the moving length of CDM toward the wake which depends on zi, the line density and velocity of string.

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Gibb, Jenny, Heather Connolly, Eva Collins, and Kathryn Pavlovich. "Nice guys making Nice Blocks." Journal of Management & Organization 22, no. 1 (April 23, 2015): 133–37. http://dx.doi.org/10.1017/jmo.2015.10.

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Like so many New Zealand stories, it began with a small, but innovative idea. One weekend at the beach, Tommy said to his friend James, ‘Why isn’t there a decent fruit juice ice block for sale?’. A market opportunity was obvious and the boys decided why not? The ‘Nice Blocks’ name and the ‘Tommy and James’ concept was developed. The company was registered in August 2010 and was New Zealand’s first Fairtrade-certified ice block company. Chris Morrison, a New Zealand pioneer of organic and Fairtrade opportunities (e.g., Phoenix Organics, All Good Bananas and Kokako Organic Coffee), joined them as a third partner in 2011, and since then two other partners have also joined the team. Nice Blocks led to Nice Cream, a coconut-based ice cream. Something nice had begun.Even without a formal business plan, Tommy and James knew that if the company was to grow they needed to think big. After working in rented cafe space, in November 2011 they took the plunge and entered a 3-year sublease on an export-quality production facility, which included a fully equipped kitchen and office spaces, along with separate space for the ice block making and refrigerated storage. In this new space, the partners installed a 40-foot-long ice block machine that led the company to quadruple its output overnight. According to James, they had the second-largest capacity to make ice blocks in New Zealand, after market leader Tip Top. The pair employs five additional staff in the summer, making a total of 10 staff.In April 2014, Tommy and James were deciding whether to focus on growing their New Zealand market share or to enter the Australian market. According to Tommy, ‘If we are to keep achieving our sales, which we have done all summer, where our growth is about 15% a month we will meet all the models that we put in place to have enough capacity to export to Australia. But we don’t want to move too fast’.

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Purohit, Prasad, and Anthony Auerbach. "Acetylcholine Receptor Gating: Movement in the α-Subunit Extracellular Domain." Journal of General Physiology 130, no. 6 (November 26, 2007): 569–79. http://dx.doi.org/10.1085/jgp.200709858.

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Acetylcholine receptor channel gating is a brownian conformational cascade in which nanometer-sized domains (“Φ blocks”) move in staggering sequence to link an affinity change at the transmitter binding sites with a conductance change in the pore. In the α-subunit, the first Φ-block to move during channel opening is comprised of residues near the transmitter binding site and the second is comprised of residues near the base of the extracellular domain. We used the rate constants estimated from single-channel currents to infer the gating dynamics of Y127 and K145, in the inner and outer sheet of the β-core of the α-subunit. Y127 is at the boundary between the first and second Φ blocks, at a subunit interface. αY127 mutations cause large changes in the gating equilibrium constant and with a characteristic Φ-value (Φ = 0.77) that places this residue in the second Φ-block. We also examined the effect on gating of mutations in neighboring residues δI43 (Φ = 0.86), εN39 (complex kinetics), αI49 (no effect) and in residues that are homologous to αY127 on the ε, β, and δ subunits (no effect). The extent to which αY127 gating motions are coupled to its neighbors was estimated by measuring the kinetic and equilibrium constants of constructs having mutations in αY127 (in both α subunits) plus residues αD97 or δI43. The magnitude of the coupling between αD97 and αY127 depended on the αY127 side chain and was small for both H (0.53 kcal/mol) and C (−0.37 kcal/mol) substitutions. The coupling across the single α–δ subunit boundary was larger (0.84 kcal/mol). The Φ-value for K145 (0.96) indicates that its gating motion is correlated temporally with the motions of residues in the first Φ-block and is not synchronous with those of αY127. This suggests that the inner and outer sheets of the α-subunit β-core do not rotate as a rigid body.

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Georgieva, Nely, Zlatin Zlatev, Mihail Karshakov, and Pavel Petrov. "A study of precision in turning external cylindrical surfaces with mov-able two-blade block." Engineering review 39, no. 2 (2019): 205–12. http://dx.doi.org/10.30765/er.39.2.10.

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In practice, movable blocks with oppositely arranged cutting inserts are used for turning internal and external cylindrical surfaces with great length. With these instruments, the dimension of dynamic adjustment is formed as a result of the continuous striving to the dynamic equilibrium of the radial components of both operation cutting forces which is restricted in the systems of the tool and the work piece. In this processing scheme, it is particularly important that the opposite cutting edges lie in a plane perpendicular to the axis of the work piece, which is difficult for implementation in certain circumstances. In addition, under certain circumstances, the variation of the machining allowance has an impact on the size of the dynamic adjustment. It leads to reduction of the diameter of the treated surface towards the dimension of the static adjustment of the block. This article proposes an innovative solution for using tools with opposite cutting inserts, which are axially displaced with guaranteed value to increase the accuracy of the obtained size. The question of adjusting the elasticity of the cutting block to compensate for the effect of the variable allowance on the accuracy of the treatment is investigated. As the result of researching, the dependencies to quantify from this impact and the conditions for its reduction are received, which can be used in practical conditions for increasing accuracy of the static adjustment.

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Priyanka, Gurinder Singh, and Kulbir Singh. "An improved block based copy-move forgery detection technique." Multimedia Tools and Applications 79, no. 19-20 (January 24, 2020): 13011–35. http://dx.doi.org/10.1007/s11042-019-08354-x.

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Parveen, Azra, Zishan Husain Khan, and Syed Naseem Ahmad. "Block-based copy–move image forgery detection using DCT." Iran Journal of Computer Science 2, no. 2 (January 22, 2019): 89–99. http://dx.doi.org/10.1007/s42044-019-00029-y.

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Berger, C. A., and H. J. Edenberg. "Pyrimidine dimers block simian virus 40 replication forks." Molecular and Cellular Biology 6, no. 10 (October 1986): 3443–50. http://dx.doi.org/10.1128/mcb.6.10.3443.

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UV light produces lesions, predominantly pyrimidine dimers, which inhibit DNA replication in mammalian cells. The mechanism of inhibition is controversial: is synthesis of a daughter strand halted at a lesion while the replication fork moves on and reinitiates downstream, or is fork progression itself blocked for some time at the site of a lesion? We directly addressed this question by using electron microscopy to examine the distances of replication forks from the origin in unirradiated and UV-irradiated simian virus 40 chromosomes. If UV lesions block replication fork progression, the forks should be asymmetrically located in a large fraction of the irradiated molecules; if replication forks move rapidly past lesions, the forks should be symmetrically located. A large fraction of the simian virus 40 replication forks in irradiated molecules were asymmetrically located, demonstrating that UV lesions present at the frequency of pyrimidine dimers block replication forks. As a mechanism for this fork blockage, we propose that polymerization of the leading strand makes a significant contribution to the energetics of fork movement, so any lesion in the template for the leading strand which blocks polymerization should also block fork movement.

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Berger, C. A., and H. J. Edenberg. "Pyrimidine dimers block simian virus 40 replication forks." Molecular and Cellular Biology 6, no. 10 (October 1986): 3443–50. http://dx.doi.org/10.1128/mcb.6.10.3443-3450.1986.

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UV light produces lesions, predominantly pyrimidine dimers, which inhibit DNA replication in mammalian cells. The mechanism of inhibition is controversial: is synthesis of a daughter strand halted at a lesion while the replication fork moves on and reinitiates downstream, or is fork progression itself blocked for some time at the site of a lesion? We directly addressed this question by using electron microscopy to examine the distances of replication forks from the origin in unirradiated and UV-irradiated simian virus 40 chromosomes. If UV lesions block replication fork progression, the forks should be asymmetrically located in a large fraction of the irradiated molecules; if replication forks move rapidly past lesions, the forks should be symmetrically located. A large fraction of the simian virus 40 replication forks in irradiated molecules were asymmetrically located, demonstrating that UV lesions present at the frequency of pyrimidine dimers block replication forks. As a mechanism for this fork blockage, we propose that polymerization of the leading strand makes a significant contribution to the energetics of fork movement, so any lesion in the template for the leading strand which blocks polymerization should also block fork movement.

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Mahmood, Toqeer, Tabassam Nawaz, Aun Irtaza, Rehan Ashraf, Mohsin Shah, and Muhammad Tariq Mahmood. "Copy-Move Forgery Detection Technique for Forensic Analysis in Digital Images." Mathematical Problems in Engineering 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/8713202.

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Due to the powerful image editing tools images are open to several manipulations; therefore, their authenticity is becoming questionable especially when images have influential power, for example, in a court of law, news reports, and insurance claims. Image forensic techniques determine the integrity of images by applying various high-tech mechanisms developed in the literature. In this paper, the images are analyzed for a particular type of forgery where a region of an image is copied and pasted onto the same image to create a duplication or to conceal some existing objects. To detect the copy-move forgery attack, images are first divided into overlapping square blocks and DCT components are adopted as the block representations. Due to the high dimensional nature of the feature space, Gaussian RBF kernel PCA is applied to achieve the reduced dimensional feature vector representation that also improved the efficiency during the feature matching. Extensive experiments are performed to evaluate the proposed method in comparison to state of the art. The experimental results reveal that the proposed technique precisely determines the copy-move forgery even when the images are contaminated with blurring, noise, and compression and can effectively detect multiple copy-move forgeries. Hence, the proposed technique provides a computationally efficient and reliable way of copy-move forgery detection that increases the credibility of images in evidence centered applications.

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Islam, Mohammad Manzurul, Gour Karmakar, Joarder Kamruzzaman, and Manzur Murshed. "A Robust Forgery Detection Method for Copy–Move and Splicing Attacks in Images." Electronics 9, no. 9 (September 12, 2020): 1500. http://dx.doi.org/10.3390/electronics9091500.

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Internet of Things (IoT) image sensors, social media, and smartphones generate huge volumes of digital images every day. Easy availability and usability of photo editing tools have made forgery attacks, primarily splicing and copy–move attacks, effortless, causing cybercrimes to be on the rise. While several models have been proposed in the literature for detecting these attacks, the robustness of those models has not been investigated when (i) a low number of tampered images are available for model building or (ii) images from IoT sensors are distorted due to image rotation or scaling caused by unwanted or unexpected changes in sensors’ physical set-up. Moreover, further improvement in detection accuracy is needed for real-word security management systems. To address these limitations, in this paper, an innovative image forgery detection method has been proposed based on Discrete Cosine Transformation (DCT) and Local Binary Pattern (LBP) and a new feature extraction method using the mean operator. First, images are divided into non-overlapping fixed size blocks and 2D block DCT is applied to capture changes due to image forgery. Then LBP is applied to the magnitude of the DCT array to enhance forgery artifacts. Finally, the mean value of a particular cell across all LBP blocks is computed, which yields a fixed number of features and presents a more computationally efficient method. Using Support Vector Machine (SVM), the proposed method has been extensively tested on four well known publicly available gray scale and color image forgery datasets, and additionally on an IoT based image forgery dataset that we built. Experimental results reveal the superiority of our proposed method over recent state-of-the-art methods in terms of widely used performance metrics and computational time and demonstrate robustness against low availability of forged training samples.

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Harris, Kimberly Ann. "What Does It Mean to Move for Black Lives?" Philosophy Today 63, no. 2 (2019): 275–91. http://dx.doi.org/10.5840/philtoday2019731265.

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I argue that the key ideas of the movement for Black lives have resonances with Frantz Fanon’s ideas particularly in Black Skin, White Masks. I first demonstrate how the mission to repudiate Black demise and affirm Black humanity captures Fanon’s critique of universal humanism. The fear of the Black body was central to the testimonies of Darren Wilson, Jeronimo Yanez, and George Zimmerman (the individuals that shot and killed Mike Brown, Philando Castile, and Trayvon Martin respectively). Fanon prioritized the role of the body in his account of racism. It is difficult to not see the relevance of Fanon’s analysis when one considers these testimonies. Lastly, I demonstrate how the chants “Black lives matter,” “Hands up, don’t shoot,” and “I can’t breathe” are acknowledgments of the significance of Black lives and serve as contemporary instances of Fanon’s sociodiagnostic approach.

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Raman, Srilata, C. L. Liu, and Larry G. Jones. "Timing-Constrained FPGA Placement: A Force-Directed Formulation and Its Performance Evaluation." VLSI Design 4, no. 4 (January 1, 1996): 345–55. http://dx.doi.org/10.1155/1996/53238.

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In this paper we present a simple but efficient timing-driven placement algorithm for FPGAs. The algorithm computes forces acting on a logic block in the FPGA to determine its relative location with respect to other blocks. The forces depend on the criticality of nets shared between the two blocks. Unlike other net-based approaches, timing constraints are incorporated directly into the force equations to guide the placement. Slot assignment is then used to move the blocks into valid slot locations on the FPGA chip. The assignment algorithm also makes use of the delay information of nets so that the final placement is able to meet the timing criteria specified for the circuit. The novelty of the approach lies in the formulation of the force equations and the manner in which weights of the nets are dynamically altered to influence the placement. Experiments conducted on industrial test circuits and MCNC circuits give very promising results and indicate that the algorithm succeeds in significantly reducing the maximum delay in the circuit. In addition, routability is not adversely affected and running time is low.

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Givanni, June. "A Curator's Conundrum: Programming "Black Film" in 1980s-1990s Britain." Moving Image 4, no. 1 (2004): 60–75. http://dx.doi.org/10.1353/mov.2004.0008.

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Chen, Lei, and Pan Zhang. "Computerized Simulation on Energy Saving Characteristics of Variable Displacement of Double Action Vane Pump." Advanced Materials Research 291-294 (July 2011): 2709–12. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.2709.

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Based on the study of a patent, the configuration and action principle of a new variable displacement of double-action vane pump is discussed. The pump is equipped with floating blocks that may move up and down in accordance with the rotational speed of the pump. The pump belongs to an automotive hydraulic power steering system. The mathematical and simulation model for the hydraulic power steering of an automobile was established. Different pump parameters were selected for simulation. The simulation results showed that the pump with the floating block can provide power characteristics are better than a common pump. The utilization of the proposed pump is expected to improve efficiency and decrease exhaust gas and noise.

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McCaffrey, Robert, Anthony I. Qamar, Robert W. King, Ray Wells, Giorgi Khazaradze, Charles A. Williams, Colleen W. Stevens, Jesse J. Vollick, and Peter C. Zwick. "Fault locking, block rotation and crustal deformation in the Pacific Northwest." Geophysical Journal International 169, no. 3 (June 1, 2007): 1315–40. http://dx.doi.org/10.1111/j.1365-246x.2007.03371.x.

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Summary We interpret Global Positioning System (GPS) measurements in the northwestern United States and adjacent parts of western Canada to describe relative motions of crustal blocks, locking on faults and permanent deformation associated with convergence between the Juan de Fuca and North American plates. To estimate angular velocities of the oceanic Juan de Fuca and Explorer plates and several continental crustal blocks, we invert the GPS velocities together with seafloor spreading rates, earthquake slip vector azimuths and fault slip azimuths and rates. We also determine the degree to which faults are either creeping aseismically or, alternatively, locked on the block-bounding faults. The Cascadia subduction thrust is locked mainly offshore, except in central Oregon, where locking extends inland. Most of Oregon and southwest Washington rotate clockwise relative to North America at rates of 0.4–1.0 ° Myr−1. No shear or extension along the Cascades volcanic arc has occurred at the mm/yr level during the past decade, suggesting that the shear deformation extending northward from the Walker Lane and eastern California shear zone south of Oregon is largely accommodated by block rotation in Oregon. The general agreement of vertical axis rotation rates derived from GPS velocities with those estimated from palaeomagnetic declination anomalies suggests that the rotations have been relatively steady for 10–15 Ma. Additional permanent dextral shear is indicated within the Oregon Coast Range near the coast. Block rotations in the Pacific Northwest do not result in net westward flux of crustal material—the crust is simply spinning and not escaping. On Vancouver Island, where the convergence obliquity is less than in Oregon and Washington, the contractional strain at the coast is more aligned with Juan de Fuca—North America motion. GPS velocities are fit significantly better when Vancouver Island and the southern Coast Mountains move relative to North America in a block-like fashion. The relative motions of the Oregon, western Washington and Vancouver Island crustal blocks indicate that the rate of permanent shortening, the type that causes upper plate earthquakes, across the Puget Sound region is 4.4 ± 0.3 mm yr−1. This shortening is likely distributed over several faults but GPS data alone cannot determine the partitioning of slip on them. The transition from predominantly shear deformation within the continent south of the Mendocino Triple Junction to predominantly block rotations north of it is similar to changes in tectonic style at other transitions from shear to subduction. This similarity suggests that crustal block rotations are enhanced in the vicinity of subduction zones possibly due to lower resisting stress.

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Pierattini, Alessandro. "INTERPRETING ROPE CHANNELS: LIFTING, SETTING AND THE BIRTH OF GREEK MONUMENTAL ARCHITECTURE." Annual of the British School at Athens 114 (June 4, 2019): 167–206. http://dx.doi.org/10.1017/s0068245419000030.

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The first stone ashlar blocks of Greek architecture, those of the mid-seventh-century temples at Isthmia and Corinth, pose a problem for understanding the beginnings of Greek stone construction.1Their peculiar feature is the presence of grooves plausibly explained as a way to move the blocks with ropes. Yet scholars disagree about how these ropes would have been used, and during what stage of construction. The first excavators of the two temples suggested that the ropes would have served to lift each block into place, and were subsequently extracted from the grooves once the block had been set against its neighbour. Later scholars dismissed this theory as both inconsistent with the evidence and technically impracticable, questioning whether lifting machines were used in Greek construction as early as the mid-seventh century. Currently, the widely accepted view holds that the crane appeared in the Greek world only in the late sixth century. An alternative hypothesis is that the grooves were cut early in the construction process so that ropes could be used to manoeuvre the blocks within the quarry. However, the ‘lifting’ theory continues to have its adherents. Clarifying the significance of these parallel grooves is thus a matter of some importance to the history of Greek construction. This article reassesses the alternative theses on the basis of a new examination of the evidence, and demonstrates that the idea that the grooves served for lifting is the most plausible. Furthermore, it argues that forerunners of the crane appeared in Greece well before the late sixth century. Finally, by examining how the blocks would have been manoeuvred into place after lifting, it contends that the grooves also served the purpose of placement, with a method anticipating the Classical period's sophisticated lever technique.

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Beckman, Karen. "Black Media Matters." Film Quarterly 68, no. 4 (2015): 8–23. http://dx.doi.org/10.1525/fq.2015.68.4.8.

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On May 13, 1985, the City of Philadelphia bombed the home of the radical black organization MOVE that was founded by John Africa in 1972. The military-style attack killed 11 occupants of the house, including 5 children, and destroyed almost two square blocks of a residential neighborhood, rendering 250 men, women and children homeless. In the midst of both contemporary protests responding to excessive police violence against African Americans and the military’s use of drone airpower, “Black Media Matters” returns our attention to the 1987 documentary, The Bombing of Osage Avenue, produced and directed by Louis Massiah, written and narrated by Toni Cade Bambara. Drawing on the archives of both Massiah and Bambara, this essay explores the film as a model of a media response to black political protest, death and suffering that resists spectacularization and oversimplification, and instead fosters historical awareness and critical reflection.

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SWEDAK, JULIA A. M., and ARTHUR FORER. "Sex-chromosome anaphase movements in crane-fly spermatocytes are coordinated: ultraviolet microbeam irradiation of one kinetochore of one sex chromosome blocks the movements of both sex chromosomes." Journal of Cell Science 88, no. 4 (November 1, 1987): 441–52. http://dx.doi.org/10.1242/jcs.88.4.441.

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Sex chromosomes in crane-fly spermatocytes move polewards at anaphase after the autosomes have reached the poles. In Nephrotoma abbreviate the sex chromosomes are 8 μm long by 3.5 μm wide and have two orientations when they move: the long axis of the sex chromosome is either perpendicular or parallel to the spindle axis. We assume (1) that when a sex chromosome is perpendicular to the spindle axis it has a chromosomal spindle fibre to each pole, one from each kinetochore, as in other species; and (2) that when a sex chromosome is parallel to the spindle axis each kinetochore has spindle fibres to both poles, i.e. that the latter sex chromosomes are maloriented. We irradiated one kinetochore of one sex chromosome using an ultraviolet microbeam. When both sex chromosomes were normally oriented, irradiation of a single kinetochore permanently blocked movement of both sex chromosomes. Irradiation of non-kinetochore chromosomal regions or of spindle fibres did not block movement, or blocked movement only temporarily. We argue that ultraviolet irradiation of one kinetochore blocks movement of both sex chromosomes because of effects on a ‘signal’ system. The results were different when one sex chromosome was maloriented. Irradiation of one kinetochore of a maloriented sex chromosome did not block motion of either sex chromosome. On the other hand, irradiation of one kinetochore of a normally oriented sex chromosome permanently blocked motion of both that sex chromosome and the maloriented sex chromosome. We argue that for the signal system to allow the sex chromosomes to move to the pole each sex chromosome must have one spindle fibre to each pole.

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N, CHARLESTO. "WV LEGISLATORS BLOCK BOARDʼS MOVE TO BOOST RN ENTRY LEVEL." AJN, American Journal of Nursing 86, no. 3 (March 1986): 326. http://dx.doi.org/10.1097/00000446-198603000-00034.

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Eppert, Nicholas. "(Black) Non-Analysis: From the Restrained Unconscious to the Generalized Unconscious." Labyrinth 19, no. 2 (March 14, 2018): 86. http://dx.doi.org/10.25180/lj.v19i2.96.

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This paper is a contribution to the ongoing studies revolving around the fields of Afro-Pessimism and Non-Philosophy. It is focused mostly on a short essay that Francois Laruelle wrote in 1989 called "The Concept of Generalized Analysis or 'Non-Analysis" that eventually became part of a larger work called Theorie des Etrangers, while also drawing on the latter for support. The focus is set not in terms of exegesis or commentary but in tandem with the work of Frank Wilderson III to borrow from both of their works and formulate a move from the "White restrained Unconscious" to the "(Black) generalized Unconscious". In the first section I articulate Laruelle and Wilderson's critiques of the common-sense image of the Unconscious. And in the second section I make the move from the White restrained Unconscious to the (Black) generalized Unconscious by arguing that the former is embedded within a metaphysical sovereignty of desires that excludes (Black) desires. The "White restrained Unconscious" is constituted by what Laruelle calls a "half loss" or a loss which loses itself. For this reason the (Black) generalized Unconscious cannot appear within it, for it is an absolute loss, or what Laruelle calls the Joui-sans-Jouissance. The White generalized Unconsicous blocks (Black) loss out by a transference mechanism. The opening up of the White restrained Unconscious to the (Black) generalized Unconscious which is its Identity in the last instance can only be done by "ending the World". Using Jared Sexton's notion of the "social life of social death" I show that this desire to end the world allows for a seeing from perspective of the "One" which is the subject position of the (Black) Non-Analyst and allows for a dualysis of the desires of the White restrained Unconscious.Â Â

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Siomopoulos, Anna. "The Birth of a Black Cinema: Race, Reception, and Oscar Micheaux's Within Our Gates." Moving Image 6, no. 2 (2006): 111–18. http://dx.doi.org/10.1353/mov.2007.0017.

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Patterson-Faye, Courtney J. "‘I like the way you move’: Theorizing fat, black and sexy." Sexualities 19, no. 8 (August 1, 2016): 926–44. http://dx.doi.org/10.1177/1363460716640731.

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Moving past conceptualizations of ‘mammy,’ this article discusses fat black female sexuality through experiences of black women in the plus size fashion world. I posit that these women, their clothing, and their bodies’ movement underneath their clothing, subvert previous notions of fatness, blackness and sexuality. By mapping a black feminist lens onto sexual script theory, I analyze in-depth interviews with plus size models, bloggers and designers to show that fat black women and their utilization of clothing both embody and reject mammy, regard sexuality as public and private enterprises of self-reclamation, and subscribe to and complicate cultural norms of fat black (a)sexuality.

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BREWER, JOHN D. "Move Your Shadow: South Africa Black and White." African Affairs 85, no. 340 (July 1986): 476. http://dx.doi.org/10.1093/oxfordjournals.afraf.a097812.

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Whitaker, Jennifer Seymour, and Joseph Lelyveld. "Move Your Shadow: South Africa, Black and White." Foreign Affairs 64, no. 2 (1985): 381. http://dx.doi.org/10.2307/20042653.

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47

Azol, Mas Elyna, Nur Hidayah Ramli, Y. S. Lee Lee, and Siti Azura Abuzar. "A coarse-to-fine copy-move image forgery detection method based on discrete cosine transform." Indonesian Journal of Electrical Engineering and Computer Science 14, no. 2 (May 1, 2019): 843. http://dx.doi.org/10.11591/ijeecs.v14.i2.pp843-851.

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<span>Copy-move forgery is a type of image forgery where one part of an image is copied and pasted in other regions of the same image, and it is one of the most common image forgeries to conceal some information in the original image. Discrete Cosine Transform (DCT) is one of the detection techniques which the detection rate relies intensely on the size of block used. Small block size is known for its ability to detect fine cloned objects, but the drawback is it produces too many false positive and requires high execution time. In this research, a method to overcome the weaknesses of using small block size by applying the coarse-to-fine approach with the two-tier process is proposed. The proposed method is evaluated on fifteen forged images on the CoMoFoD dataset. The results demonstrated that the proposed method is able to achieve high precision and recall rate of over 90% as well as improves the computation time by reducing the overall duration of forgery detection up to 73% compared to the traditional DCT method using small block size. Therefore, these findings validate that the proposed method offers a trade-off between accuracy and runtime.</span>

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Muhamad, Rafidah. "Block-based Approaches for Copy-move Image Forgery Detection :A Review." International Journal of Advanced Trends in Computer Science and Engineering 8, no. 1.6 (December 15, 2019): 64–68. http://dx.doi.org/10.30534/ijatcse/2019/1081.62019.

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Lai, Yuecong, Tianqiang Huang, Jing Lin, and Henan Lu. "An improved block-based matching algorithm of copy-move forgery detection." Multimedia Tools and Applications 77, no. 12 (August 19, 2017): 15093–110. http://dx.doi.org/10.1007/s11042-017-5094-y.

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Wijaya, Arya Yudhi, Said Al Musayyab, and Hudan Studiawan. "PENGEMBANGAN METODE BLOCK MATCHING UNTUK DETEKSI COPY-MOVE PADA PEMALSUAN CITRA." JUTI: Jurnal Ilmiah Teknologi Informasi 15, no. 1 (January 1, 2017): 84. http://dx.doi.org/10.12962/j24068535.v15i1.a638.

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