Bibliografie tematiche / Hand file

Letteratura scientifica selezionata sul tema "Hand file"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 febbraio 2022

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Articoli di riviste sul tema "Hand file"

Kaul, Shalan, Feby Kuriakose, Jittin James, Basil Joy e Reema Malik. "Evaluation of Radicular Dentin Microcracks Formation after Instrumentation with NiTi Hand and Rotary File System: A Stereomicroscopic Study". Journal of Contemporary Dental Practice 21, n. 11 (2020): 1233–37. http://dx.doi.org/10.5005/jp-journals-10024-2955.

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Abstract (sommario):

ABSTRACT Aim and objective The present study aimed to assess the formation of microcracks in root dentin post-instrumentation with nickel–titanium (NiTi) hand and rotary file system. Materials and methods Totally, 80 freshly extracted mandibular premolar teeth with single roots were chosen for this study. Access opening was performed and #10 K-file was used to attain patency of canal. All specimens were divided into four groups (each group having 20 specimens), i.e., Group I: Unprepared, Group II: NiTi hand K-files, Group III: Self-adjusting file, and Group IV: XP-Shaper single file. Complete irrigation of all the canals was performed after instrumentation. All roots were cut horizontally at three levels [apical third (3 mm), middle third (6 mm), and cervical third (9 mm)] from the apex with diamond disc. A stereomicroscope was used to view the sections under 20× magnification. Results Self-adjusting file showed least number of defects with a percentage of 75% followed by XP-Shaper and NiTi hand K-files with a values of 65 and 60%, respectively. Use of hand K-files resulted in greater number of incomplete cracks (30%) and use of XP-Shaper demonstrated greater number of craze lines (15%). A statistically significant difference was found between the experimental groups in the formation of dentinal defects of root at apical third (3 mm) (p < 0.031) and middle third (6 mm) (p < 0.001), whereas the sections at cervical third (9 mm) did not show any statistically significant difference (p > 0.312). Conclusion The present study concluded that the self-adjusting file system gives promising better results in cleaning ability with minimal incidence of radicular dentin microcracks than XP-Shaper and NiTi hand K-files system. Clinical significance The root dentin may unavoidably get damaged during instrumentation resulting in the formation of dentinal cracks and tiny complicated fractures, thus leading to endodontic failures. Various factors cause dentinal cracks, but the flexibility of file due to heat treatment, kinematics of the file, and the basic architecture of the file are the most significant ones. Self-adjusting file system represented satisfactory results with minimal microcracks defects. How to cite this article Kumar A, Kaul S, Kuriakose F, et al. Evaluation of Radicular Dentin Microcracks Formation after Instrumentation with NiTi Hand and Rotary File System: A Stereomicroscopic Study. J Contemp Dent Pract 2020;21(11):1233–1237.

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Akhtar, Mohd Salman, Ankit Agarwal, Mohammed Ayaz Malick, Sheeba Khan, Sachin Yadav e Sajal Agarwal. "Evaluation of apical debris extrusion during root canal preparation using Hand K file, Revo S, Protaper Next and Wave One file system: An in vitro study." UNIVERSITY JOURNAL OF DENTAL SCIENCES 6, n. 2 (26 settembre 2020): 16–21. http://dx.doi.org/10.21276/ujds.2020.6.2.22.

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Introduction: The key step during the root canal treatment is the biomechanical preparation of the infected root canals. This preparation may result in pushing the apical debris through the apical foramen into the periapical space leading to initiation of immunological response by the host leading to postoperative pain and discomfort. Therefore the aim of the study was to compare the apical debris extrusion during root canal preparation using Hand k file, Revo S, Protaper Next and Wave One file system. Materials and Method: Sixty extracted human mandibular premolars with single canal were selected and randomly divided into four groups (n = 15) for instrumentation with four different files. Group 1: Hand k file, Group 2: Revo S file, Group 3: ProTaper Next, and Group 4: WaveOne single reciprocating file. Debris extruding during instrumentation were collected into pre-weighed Eppendorf tubes. These tubes were then stored in an incubator at 70°C for 5 days and were then weighed to obtain the final weight, with the extruded debris. Weight of extruded debris was calculated by subtracting the initial weight from the final weight. Statistical analysis was performed using one-way analysis of variance and post hoc Tukey’s test. Result: For intergroup comparison, significant differences were found for the debris extruded. Instrumentation with hand K files resulted in significantly more debris extrusion apically as compared to other three NiTi groups. Maximum debris extrusion was seen by Hand K file, followed by group 2(Revo S), then group 4(Wave One) and least by group 3(Protaper Next). However, there was no significant difference in debris extrusion amongst groups prepared with either NiTi rotary or reciprocating file systems. Conclusion: The Pro Taper Next resulted in least debris extrusion when compared to Hand k file, reciprocating Wave One and rotary Revo S. However there was not a significant difference between all the NiTi rotary and reciprocating file system. Keywords: Apical extrusion debris; Hand k file, instrumentation; ProTaper Next, RevoS and WaveOne.

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Voiculeanu, Monica, Ioana Suciu, Bogdan Dimitriu e Mihaela Grigore. "Aspects of the biomechanical root canal treatment – step-back technique. In vitro study". Romanian Journal of Stomatology 61, n. 4 (31 dicembre 2015): 304–10. http://dx.doi.org/10.37897/rjs.2015.4.10.

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Evaluation of post-operative root canal shape have been performed using simulated root canals in resin blocks and magnification analysis (stereomicroscope) have been used for the study. The technique selected was stepback with conventional hand stainless steel instruments. The aim of studies on post-operative root canal shape is to evaluate the conicity, taper and flow and maintenance of original canal shape and to record the degree and frequency of straightening, apical transportation, ledging, zipping, teardrops, elbows. Ideal preparation forms for the root canals can be possible without any preparation errors with circular incorporation of the original canal cross section – if the technique starts with adequately precurved negotiating files. Preparation errors (zips, canal transportation, apical perforations, elbows, teardrops, etc) can occur mostly when stainless steel hand instruments (K-file) are used for moderate to severe curved of root canals, especially K-file with cutting tips and not prebent. Ideal preparation shape without any preparation errors could be a final shape and adequate shape even for conventional hand files and step-back technique. For the first area of step back technique, even for the begining, we can usually use various prebent stainless steel hand instruments for pathfinding. In many cases, conventional hand instruments produces adequate shapes for the root canals. For this final shape, is important to use adequately precurved negotiating files. Conventional stainless stell are rigid enough that thay should be precurved to match the curvature of the canal during instrumentation. Conventional hand instruments has two basic design, Kerr-file and Kerr-reamer. Kerr-file could be used to enlarge the canal with a longitudinal filing action. Kerr-reamer may used in a same fashion, but is much more flexible instrument than K-file. Noncutting tip follow the canal better than instruments with active tips – clinically usefull element.

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Choudhary, Bharat, Atul Jain, Kanchan Bhadoria e Nakul Patidar. "Comparison of Dentinal Defects induced by Hand Files, Multiple, and Single Rotary Files: A Stereomicroscopic Study". World Journal of Dentistry 8, n. 1 (2017): 45–48. http://dx.doi.org/10.5005/jp-journals-10015-1409.

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ABSTRACT Aim This study was carried out to compare the dentinal defects induced by single rotary file system, multiple rotary file system, and hand files. Materials and methods Sixty single-rooted premolars were selected based on predetermined criteria. They were divided into three groups: Group I (hand K files), group II (Hero Shaper), and group III (One Shape). Biomechanical preparation was carried out as per the manufacturer's instructions. Each specimen was sectioned horizontally and divided into apical, middle, and coronal sections. These sections were visualized under stereomicroscope to evaluate the dentinal defects using predetermined criteria. Results Roots prepared with Hero Shaper showed more number of defects than One Shape, whereas in roots prepared with hand files lowest percentage of dentinal defects were present. There was statistically significant difference between the Hero Shaper group and the One Shape group (p < 0.05). Conclusion All rotary files induce defects in root dentin, whereas the hand instruments induce minimal defects. Clinical significance With single rotary file system, preparation time is reduced and it is easier for patients to accept the treatment. Moreover, the potential of root fracture is reduced. How to cite this article Jain A, Bhadoria K, Choudhary B, Patidar N. Comparison of Dentinal Defects induced by Hand Files, Multiple, and Single Rotary Files: A Stereomicroscopic Study. World J Dent 2017;8(1):45-48.

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Sachdeva, Jyoti, Chetan R. Patil, Venugopal Thangala, Pabbati Ravi Kumar e Akash Krishna. "To Evaluate and Compare the Efficacy, Cleaning Ability of Hand and Two Rotary Systems in Root Canal Retreatment". Journal of Contemporary Dental Practice 14, n. 3 (2013): 440–44. http://dx.doi.org/10.5005/jp-journals-10024-1341.

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ABSTRACT Aim To evaluate and compare the efficacy, cleaning ability of hand and two rotary systems in root canal retreatment. Methodology Sixty extracted premolars were retreated with following systems: Group 1—ProTaper Universal retreatment files, Group 2—ProFile system, Group 3—H-file. Specimens were split longitudinally and amount of remaining gutta-percha on the canal walls was assessed using direct visual scoring with the aid of stereomicroscope. Results were statistically analyzed using ANOVA test. Results Completely clean root canal walls were not achieved with any of the techniques investigated. However, all three systems proved to be effective for gutta-percha removal. Significant difference was found between ProTaper universal retreatment file and H-file, and also between ProFile and H-file. Conclusion Under the conditions of the present study, ProTaper Universal retreatment files left significantly less guttapercha and sealer than ProFile and H-file. Clinical significance Rotary systems in combination with gutta-percha solvents can perform superiorly as compared to the time tested traditional hand instrumentation in root canal retreatment. How to cite this article Shivanand S, Patil CR, Thangala V, Kumar PR, Sachdeva J, Krishna A. To Evaluate and Compare the Efficacy, Cleaning Ability of Hand and Two Rotary Systems in Root Canal Retreatment. J Contemp Dent Pract 2013;14(3):440-444.

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Srinivas, Abhinaya, LGanesh Jeevanandan, Lavanya Govindaraju e Erulappan Muthu Ganapathi Subramanian. "Comparative Evaluation of The Efficacy Of Rotary file system (Kedo-S) Vs Hand K-Files In Root Canal Preparation Of Primary Teeth Using Cone Beam Computed Tomography (CBCT) - An In Vitro Study". Brazilian Dental Science 22, n. 2 (30 aprile 2019): 197–202. http://dx.doi.org/10.14295/bds.2019.v22i2.1705.

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Objective: To evaluate the efficacy of rotary Kedo-S and hand K-files in shaping ability in primary canines using cone beam computed tomography. Materials and Methods: Thirty extracted primary maxillary and mandibular canines were selected. Using cone beam computed tomography the teeth were scanned before instrumentation. In Group I, the teeth were prepared using stainless steel K file up to the size of 40. In the Group II teeth, U1 size Kedo-S rotary file was used in crown down technique. The instrumented teeth were scanned again with cone beam computed tomography and the images were compared. Results: The canal taper was more conical for rotary Kedo-S files as compared to K-files, which was statistically significant. Conclusion: Canal preparation with Rotary files resulted in more conical canals when compared to manual instrumentation in primary teeth that contributes to more uniform obturation.KeywordsCBCT; Hand K-files; Kedo-S file system; Primary teeth; Pulpectomy; Rotary instrumentation.

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Topcu, K. Meltem, Ertugrul Karatas, Damla Ozsu e Ibrahim Ersoy. "Efficiency of the Self Adjusting File, WaveOne, Reciproc, ProTaper and hand files in root canal debridement". European Journal of Dentistry 08, n. 03 (luglio 2014): 326–29. http://dx.doi.org/10.4103/1305-7456.137636.

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ABSTRACT Objectives: The aim of this study was to compare the canal debridement capabilities of three single file systems, ProTaper, and K-files in oval-shaped canals. Materials and Methods: Seventy-five extracted human mandibular central incisors with oval-shaped root canals were selected. A radiopaque contrast medium (Metapex; Meta Biomed Co. Ltd., Chungcheongbuk-do, Korea) was introduced into the canal systems and the self-adjusting file (SAF), WaveOne, Reciproc, ProTaper, and K-files were used for the instrumentation of the canals. The percentage of removed contrast medium was calculated using pre- and post-operative radiographs. Results: An overall comparison between the groups revealed that the hand file (HF) and SAF groups presented the lowest percentage of removed contrast medium, whereas the WaveOne group showed the highest percentage (P < 0.001). The ProTaper group removed more contrast medium than the SAF and HF groups (P < 0.05). Conclusions: None of the instruments was able to remove the contrast medium completely. WaveOne performed significantly better than other groups.

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Kaur, Artinder, Devendra Chaudhary, Navneet Kukreja, Abhishek Bansal, Jyoti Bansal e Urvashi Kukreja. "The Battle in Endodontics: A Review". Dental Journal of Advance Studies 02, n. 02 (agosto 2014): 059–63. http://dx.doi.org/10.1055/s-0038-1671987.

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AbstractNickel titanium rotary shaping files fundamentally changed everything in endodontics; conceptually, procedurally and economically as well. NiTi rotary files made root canal therapy more accessible and kind of fun for dentists, and dental companies were loved for making files that cost four times more than stainless steel hand files but delivered a ten times improvement. The single file systems need no disinfecting, cleaning, sterilizing and organizing the NiTi files, provide optimal cutting efficiency along with better control of file breakage and thus increased patient safety and no risk for cross contamination.

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Yahya, Eman M., Ali M. Al Naimi e Abduladheem R. Sulaiman. "Quantitative evaluation of debris extruded apically using reciprocating versus continuous rotation single file with rotary and hand glide path file." Journal of Oral Research S, n. 1 (30 aprile 2019): 32–35. http://dx.doi.org/10.17126/joralres.2019.088.

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Chemomechanical root canal preparation (CMRCP) is an important step in root canal treatment. However, one of its negative consequences is apical extrusion of debris of the root canal system contributing to treatment failure and flare-ups. Glide path preparation (GPP) is the initial phase of CMRCP and is crucial for assessing root canal anatomy and establishing unobstructed access to the apical part of the canal. Materials and methods: Forty human mandibular permanent central and lateral incisors were selected; the debris collection apparatus was prepared and the teeth were then divided into four groups: Group 1: Rotary glide path preparation with ProGlider followed by instrumentation with Wave One files. Group 2: Rotary glide path preparation with ProGlider followed by instrumentation with One Shape files. Group 3: Hand glide path preparation with K-file followed by instrumentation with Wave One files. Group 4: Hand glide path preparation with K-file followed by instrumentation with One Shape files. The collected debris was weighed in an analytical digital balance and the collected data were statistically analyzed. Results: No significant difference was present between groups with the same method of glide path preparation or between Wave One and One Shape files. Rotary glide path preparation produced less debris than hand preparation (p≤0.05). Conclusions: Extrusion of debris was observed in all test groups. Rotary glide path preparation could be preferred in clinical practice as it is associated with less debris extrusion than the manual method.

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Chandra, Padma, Rajesh Prasad, Surendra Kumar Mishra e Jagdish Chandra. "The Evaluation of apically extruded debris during root canal preparation using Pro-Taper Universal, ProTaper Gold and Reciproc Blue system: An in-vitro comparative Study". UNIVERSITY JOURNAL OF DENTAL SCIENCES 6, n. 2 (25 agosto 2020): 11–15. http://dx.doi.org/10.21276/ujds.2020.6.2.6.

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ABSTRACT Aims & Objectives: The purpose of this study was to compare the amount of apically extruded debris with four nickel-titanium instruments i.e ProTaper Universal, ProTaper Gold, and Reciproc Blue system, Hand K file System. Methods: Eighty extracted single-rooted mandibular premolar human teeth were randomly assigned to 4 groups (n = 20). The canals were instrumented using 1 of the following instruments: ProTaper Universal, ProTaper Gold, and Reciproc Blue system, Hand K file System. Apically extruded debris during instrumentation was collected into preweighed Eppendorf tubes. The weight of the extruded debris was calculated by subtracting the weight of the empty tubes from that of the tubes containing the debris. The data were analyzed statistically using the analysis of variance (ANOVA) and Post-hoc bonferroni test at a significance level of P < .05. Results: All the instrumentation systems resulted in production of extruded debris. The amount of extruded debris was significantly more in Hand K file than PTU, PTG and Reciproc Blue (P<0.05). The PTU system was associated with significantly more extruded debris than the PTG(P=0.041), Reciproc Blue systems (P=`0.011), whereas no significant difference was found in the amount of the debris extruded between PTG and Reciproc Blue (P=0.271). The amount of extruded debris was least in Reciproc Blue in comparison to all used system. Conclusions: Within the limitations of this in vitro study, the amount of apically extruded debris registered for the different files tested was highest for hand file, Protaper Universal, followed by the ProTaper Gold and least in Reciproc Blue.

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Più fonti

Tesi sul tema "Hand file"

Sattapan, Boonrat. "Dynamic properties of nickel-titanium instruments". Connect to thesis, 1997. http://repository.unimelb.edu.au/10187/2437.

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Root canal preparation in narrow, curved canals is a challenge even for experienced endodontists. Recently nickel-titanium (NiTi) hand files have played an important role in root canal preparation, particularly in curved root canals. Nickel-titanium endodontic instruments were first investigated in 1988 by Walia et al. who found that NiTi files have two to three times more elastic flexibility in bending and torsion, as well as superior resistance to torsional fracture compared with similar stainless steel files.

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Iglecias, Elaine Faga. "Comparação entre a capacidade de desobturação de canais radiculares obturados com cimentos à base de MTA, polímero da mamona e resina epóxica utilizando instrumento manual ou rotatório/". São José dos Campos : [s.n.], 2008. http://hdl.handle.net/11449/90377.

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Orientador: Cláudio Antonio Talge Carvalho
Banca: Cláudio Antonio Talge Carvalho
Banca: Marcia Carneiro Valera
Banca: Celso Kenji Nishiyama
Resumo: Em alguns casos, o fracasso do tratamento endodôntico indica a necessidade de um retratamento do canal radicular, que pode ser realizado com diversas técnicas, auxiliadas ou não por solvente. O objetivo deste estudo foi comparar a qualidade e o tempo necessário para desobturação de canais obturados com cimento à base de resina epóxica (AH Plus), cimento experimental à base de MTA e cimento experimental à base de Mamona utilizando-se limas manuais Hedströem e limas rotatórias ProTaper® Retratamento, com ou sem solvente (eucaliptol). 120 raízes de dentes uniradiculares humanos foram instrumentadas e então divididas em 3 grupos de acordo com o cimento utilizado, sendo em seguida radiografadas no sentido mésio-distal e vestíbulo-lingual, com auxílio de uma matriz de silicona. Cada grupo inicial foi subdividido de acordo com a técnica: desobturação manual com ou sem solvente e desobturação rotatória com ou sem solvente, formando um total de 12 grupos com 10 dentes cada. Ao final, os espécimes foram novamente radiografados e alguns espécimes, em caráter ilustrativo, diafanizados. As radiografias iniciais e finais foram digitalizadas e as mesmas foram medidas pelo programa Image Tools comparando os volumes de obturação inicial e remanescente. Os resultados médios obtidos em porcentagem do volume de material obturador remanescente em ordem decrescente foram: AH Plus/rotatório/solvente (39.84) > AH Plus/rotatório (29.85) > AH Plus/manual/solvente (22.37) > mamona/manual (17.17) > mamona/manual/solvente (16.15) > AH Plus/manual (15.89) > MTA/manual (14.12) > MTA/rotatório/solvente (9.71) > MTA/manual/solvente (9.17) > mamona/rotatório/solvente (5.53) > mamona/rotatório (5.14) > MTA/rotatório (2.7). Com relação ao tempo de desobturação os resultados médios em segundos, em ordem decrescente foram: mamona/rotatório/solvente (171.4) > mamona/rotatório (202.0) > MTA... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Convencional endodontic retreatment has largely used for the management of failed root canal treatment. The objective of the present study was to evaluate the effectiveness and the time necessary of hand (hedströem file)and rotary (Pro Taper® retreatment) instrumentation for removal of filling material from root canals. 120 extracted uniradicular teeth were selected. The teeth were root filled using thermomechanical compactation of gutta-percha and sealer: MTA-based sealer, polymer castor oil-based sealer or AH Plus. After 7 days, the roots were randomized in groups and the filling material was removed using the following techniques: hand instrumentation with or without eucalyptol and rotary instrumentation with and without eucalyptol . Radiographs were taken in buccolingual and mesiodistal direction. The images were scanned and digitized. The total area of the canal and the area with remaining obturation material were measured in millimeters using computed image analysis system (Image Tool for Windows). Comparisons of the percentages of remaining filling material in the root canal reveal the AH Plus/rotary instrumentation group resulted in a bigger percentage of canal area covered by residual filling material, with a significant difference statistics. The use of eucalyptol not reveals any significant differences between the methods of removal. The bigger time of retreatment were groups polymer castor oil/hand instrumentation with or without eucalyptol. All instruments left remnants of filling material on the root canal walls irrespective of the root filling material used.
Mestre

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Iglecias, Elaine Faga [UNESP]. "Comparação entre a capacidade de desobturação de canais radiculares obturados com cimentos à base de MTA, polímero da mamona e resina epóxica utilizando instrumento manual ou rotatório". Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/90377.

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Made available in DSpace on 2014-06-11T19:24:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-06-16Bitstream added on 2014-06-13T18:20:50Z : No. of bitstreams: 1 iglecias_ef_me_sjc.pdf: 610309 bytes, checksum: 9f116ad6d0e3dd6b320acf9483f84645 (MD5)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Em alguns casos, o fracasso do tratamento endodôntico indica a necessidade de um retratamento do canal radicular, que pode ser realizado com diversas técnicas, auxiliadas ou não por solvente. O objetivo deste estudo foi comparar a qualidade e o tempo necessário para desobturação de canais obturados com cimento à base de resina epóxica (AH Plus), cimento experimental à base de MTA e cimento experimental à base de Mamona utilizando-se limas manuais Hedströem e limas rotatórias ProTaper® Retratamento, com ou sem solvente (eucaliptol). 120 raízes de dentes uniradiculares humanos foram instrumentadas e então divididas em 3 grupos de acordo com o cimento utilizado, sendo em seguida radiografadas no sentido mésio-distal e vestíbulo-lingual, com auxílio de uma matriz de silicona. Cada grupo inicial foi subdividido de acordo com a técnica: desobturação manual com ou sem solvente e desobturação rotatória com ou sem solvente, formando um total de 12 grupos com 10 dentes cada. Ao final, os espécimes foram novamente radiografados e alguns espécimes, em caráter ilustrativo, diafanizados. As radiografias iniciais e finais foram digitalizadas e as mesmas foram medidas pelo programa Image Tools comparando os volumes de obturação inicial e remanescente. Os resultados médios obtidos em porcentagem do volume de material obturador remanescente em ordem decrescente foram: AH Plus/rotatório/solvente (39.84) > AH Plus/rotatório (29.85) > AH Plus/manual/solvente (22.37) > mamona/manual (17.17) > mamona/manual/solvente (16.15) > AH Plus/manual (15.89) > MTA/manual (14.12) > MTA/rotatório/solvente (9.71) > MTA/manual/solvente (9.17) > mamona/rotatório/solvente (5.53) > mamona/rotatório (5.14) > MTA/rotatório (2.7). Com relação ao tempo de desobturação os resultados médios em segundos, em ordem decrescente foram: mamona/rotatório/solvente (171.4) > mamona/rotatório (202.0) > MTA...
Convencional endodontic retreatment has largely used for the management of failed root canal treatment. The objective of the present study was to evaluate the effectiveness and the time necessary of hand (hedströem file)and rotary (Pro Taper® retreatment) instrumentation for removal of filling material from root canals. 120 extracted uniradicular teeth were selected. The teeth were root filled using thermomechanical compactation of gutta-percha and sealer: MTA-based sealer, polymer castor oil-based sealer or AH Plus. After 7 days, the roots were randomized in groups and the filling material was removed using the following techniques: hand instrumentation with or without eucalyptol and rotary instrumentation with and without eucalyptol . Radiographs were taken in buccolingual and mesiodistal direction. The images were scanned and digitized. The total area of the canal and the area with remaining obturation material were measured in millimeters using computed image analysis system (Image Tool for Windows). Comparisons of the percentages of remaining filling material in the root canal reveal the AH Plus/rotary instrumentation group resulted in a bigger percentage of canal area covered by residual filling material, with a significant difference statistics. The use of eucalyptol not reveals any significant differences between the methods of removal. The bigger time of retreatment were groups polymer castor oil/hand instrumentation with or without eucalyptol. All instruments left remnants of filling material on the root canal walls irrespective of the root filling material used.

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Žampachová, Lenka. "Hand-made film". Master's thesis, Vysoké učení technické v Brně. Fakulta výtvarných umění, 2010. http://www.nusl.cz/ntk/nusl-232283.

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Ward, Julie Anne. "The Mistress". The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276717955.

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Lass, Barbara Frances. "Hans Richter : film artist /". Access Digital Full Text version, 1987. http://pocketknowledge.tc.columbia.edu/home.php/bybib/10778974.

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Yaeger, Matthew. "Hands On Painting". VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3823.

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How can we know something through how it is sensed? Making anthropomorphic, three-dimensional paintings through a set of basic, at-hand materials, I’m interested in how empathy, modesty, and doubt can mediate a tangible experience of an object. Challenging notions of perception, I want to create a heightened sense of awareness in which the intangible can be seen or felt.

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Cotton, Darryl Paul James. "Thick-film piezoelectric slip sensors for a prosthetic hand". Thesis, University of Southampton, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444223.

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Gentilcore, Dominic M. "Response of Pinyon-juniper woodlands to fire, chaining, and hand thinning". Thesis, University of Nevada, Reno, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1591350.

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Pinyon-juniper (Pinus monophylla – Juniperus osteosperma) woodlands have expanded and infilled over the last 150 years to cover more than 40 million ha in the Great Basin. Many land managers seek to remove Pinyon-juniper trees using a variety of treatments. This thesis looks at six different Pinyon-juniper removal projects in Central and Eastern Nevada. We established a total of 73 vegetation and soil monitoring plots (38 treated, 35 adjacent untreated) across six Pinyon-juniper removal projects in Central and Eastern Nevada to look at the effects of fire, hand thinning, and chaining. The four burns examined together in Chapter 1 had similar elevation, precipitation, and pre-treatment vegetation communities in the untreated areas, but the treated areas had significantly different responses to treatment. With nonmetric multidimensional scaling (NMS), we found a useful 3-axis ordination of the plots (stress=7.1, R²=.966). Within ordination space, the treated plots were well grouped by parent material. These results informed a Poisson generalized linear model that found parent material factorized explained 86.5% of the deviance in cheatgrass (Bromus tectorum) cover at the treated plots. The projects on soils derived from welded tuff had very little cheatgrass while soils derived from limestone or mixed limestone/volcanics were dominated by cheatgrass. Parent material should be considered an important factor when planning Pinyon-juniper removal treatments. Chapter 2 examined the effects of a hand thinning. The hand thinning significantly reduced tree cover [F(1,10) = 7.43, p = 0.027] to less than 2%. Perennial grasses on the site are slightly higher in the treated area. There was a significant increase in perennial grass cover from 2013 to 2014 [F(1,10) = 14.5, p = 0.003]. The hand thinning did not have significant effects on shrubs, annual grasses, annual forbs, perennial forbs, ground cover, stability, species richness, diversity, infiltration, or gap structure. Because hand thinning does not remove the shrubs or other perennials, site resistance can be maintained. With sufficient understory vegetation to maintain resistance post treatment (as in phase I or early phase II Pinyon-juniper woodlands), nonnative annual grasses are less likely to dominate after treatment. Chapter 3 examined the effects of a chaining. The effects of the 40-year old chaining are still significant even though Pinyon-juniper trees are reinvading and make up >5% of the cover in the treated area. The treated areas still have a much more productive understory than adjacent untreated areas. Perennial grass cover, frequency, and density was 2-5 times greater in the chained area. The treated area had fewer large gaps (>100 cm). However, interspace infiltration times were slower in the treatment (t(4)=-2.14, p=0.09). Surface and subsurface soil aggregate stability remained significantly lower in the treatment for vegetation-protected and unprotected samples (t(4)=3.53, p=0.024; t(4)=3.10, p=0.036). Chainings have long-term benefits for vegetation, but also long term impacts on soils and hydrologic ecosystem processes. When planning Pinyon-juniper removal treatments, land managers should consider the plant community, temperature and precipitation regime, and soils at the potential treatment location to better achieve desired outcomes.

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Yao, Weijie. "Fine-Grained Hand Pose Estimation System based on Channel State Information". The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1593211557742674.

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Libri sul tema "Hand file"

Mealor, Vernon. The file on Colonel Moran: Sherlock Holmes takes a hand. Leicester: Linford, 2014.

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Pappas, Chris H. Borland C[plus plus] hand book. Berleley, Calif: Osorne McGraw-Hill, 1991.

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Applegate, Rex. The close-combat files of Colonel Rex Applegate. Boulder, Colo: Paladin Press, 1998.

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Henham, Brian. Hand in Hand, 1696-1996. London: Commercial Union Assurance Company, 1996.

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Bronzini, Marisa. Marisa Bronzini: Filo 1996. Milano: Charta, 1996.

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Cobb, Steven. Hands-on paradox. Louisville, KY: Cobb Group, 1987.

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B, Fox Marianne, a cura di. Hands-on Wordperfect 5.1. Redwood City, Calif: Benjamin/Cummings Pub. Co., 1991.

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Hands-on guide to PC and MS DOS. Boston: Little, Brown, 1986.

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File & disk management: From chaos to control. Berkeley, Calif: Osborne McGraw-Hill, 1993.

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Hard disk solutions with batch file utilities. Toronto: Bantam Books, 1987.

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Capitoli di libri sul tema "Hand file"

Rayan, Ghazi M., e Joseph Upton III. "Five-fingered Hand". In Congenital Hand Anomalies and Associated Syndromes, 421–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54610-5_31.

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Sax, Hugo, Benedetta Allegranzi e Didier Pittet. "My Five Moments for Hand Hygiene". In Hand Hygiene, 134–43. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781118846810.ch20.

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Bearce, Stephanie. "The Black Hand". In Top Secret Files, 2–5. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003239215-2.

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Conrich, Ian, e Laura Sedgwick. "Hands". In Gothic Dissections in Film and Literature, 131–50. London: Palgrave Macmillan UK, 2017. http://dx.doi.org/10.1057/978-1-137-30358-5_9.

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Lester, Richard. "A Hard Day’s Night". In 100 Film Musicals, 98–100. London: British Film Institute, 2011. http://dx.doi.org/10.1007/978-1-84457-568-8_38.

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Janjić, G., Z. Golubović, D. Parabucki e B. Illičić. "Hand Burns in Children". In The Management of Burns and Fire Disasters: Perspectives 2000, 433–36. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-009-0361-6_74.

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Dertadian, George C. "Work Hard, Play Hard: Cycles of Restrain and Release in Painkiller Use". In A Fine Line, 171–200. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1975-4_6.

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Durgnat, Raymond. "Developing the Film". In A Long Hard Look at ‘Psycho’, 10–20. London: British Film Institute, 2010. http://dx.doi.org/10.1007/978-1-84457-560-2_2.

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Jeffords, Susan. "Hollywood's Hard Bodies". In A Companion to the Action Film, 256–69. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2019. http://dx.doi.org/10.1002/9781119100744.ch13.

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Amico, M., V. Geraci, R. Brancato e M. Masellis. "Rehabilitation in Severe Burned Hand Sequelae". In The Management of Burns and Fire Disasters: Perspectives 2000, 443–44. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-009-0361-6_77.

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Atti di convegni sul tema "Hand file"

Kimmer, C. J., e C. K. Harnett. "Combining Strings and Fibers With Additive Manufacturing Designs". In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-59569.

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High tensile strength cables, low-resistance motor windings, and shape memory actuators are common examples of technical fibers used in robots and other electromechanical assemblies. Because properties like tensile strength, crystal structure, and polymer alignment depend strongly on processing history, these materials cannot be 3D printed with the same properties they have on the spool. Strings and fibers are inserted in mechanical parts at the end of the manufacturing process for these assemblies. When the fibers take complex paths, the installation is often done by hand. This activity can dominate the process time, increase its human labor and reduce its social sustainability [1]. This paper applies the non-traditional approach of machine embroidery to insert sheets of patterned fibers in layered additive manufacturing processes such as 3D printing and lamination. Fibers are aligned with features in laser-cut or printed parts without the manual labor of hand threading. We demonstrate that water-soluble stabilizer materials originally designed for textiles can hold hard mechanical parts in a machine embroidery hoop with enough strength and rigidity to withstand sewing through pre-existing holes in the part. Alignment to within 250 microns has been demonstrated with a sub-$300 consumer embroidery machine. Case studies in this paper include a cable-driven mechanism, a soft-to-hard electronic connection, and an electromechanical sensor. Process-compatible and commercially available materials that can be embroidered include conductive threads, shrinking threads, water-soluble threads and high tensile strength fibers. The biggest hurdle for a user interested in this automated fiber installation process is linking the existing design file with an embroidery machine file. There is a much larger user base for 2D and 3D computer-assisted design (CAD) software than for expensive and proprietary embroidery digitizing software. We take the route chosen by the laser cutter industry, where the user produces a CAD file in their preferred editor, and makes annotations that communicate where and how densely to stitch. Translation software scans the file for a particular line style and generates stitch coordinates along it. Development is done in Jupyter/iPython notebooks that allow end-users to inspect, understand, and modify the conversion code. The intent is for users of existing planar fabrication technology (whether laser, printed circuit board, or micro/nano) to apply this method to their own CAD files for a versatile and straightforward way to put advanced materials in their devices without adding manual labor. This general approach can solve a class of assembly problems relevant to underactuated tendon-driven robotics and other electromechanical systems, expanding the range of devices that can be put together using automation.

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Ding, Houzhu, Filippos Tourlomousis, Azizbek Babakhanov e Robert C. Chang. "Design of a Personalized Skin Grafting Methodology Using an Additive Biomanufacturing System Guided by 3D Photogrammetry". In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51990.

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In this paper, the authors propose a novel method whereby a prescribed simulated skin graft is 3D printed, followed by the realization of a 3D model representation using an open-source software AutoDesk 123D Catch to reconstruct the entire simulated skin area. The methodology is photogrammetry, which measures the 3D model of a real-word object. Specifically, the principal algorithm of the photogrammetry is structure from motion (SfM) which provides a technique to reconstruct a 3D scene from a set of images collected using a digital camera. This is an efficient approach to reconstruct the burn depth compared to other non-intrusive 3D optical imaging modalities (laser scanning, optical coherence tomography). Initially, an artificial human hand with representative dimensions is designed using a CAD design program. Grooves with a step-like depth pattern are then incorporated into the design in order to simulate a skin burn wound depth map. Then, the *.stl format file of the virtually wounded artificial hand is extruded as a thermoplastic material, acrylonitrile butadiene styrene (ABS), using a commercial 3D printer. Next, images of the grooves representing different extents of burned injury are acquired by a digital camera from different directions with respect to the artificial hand. The images stored in a computer are then imported into AutoDesk 123D Catch to process the images, thereby yielding the 3D surface model of the simulated hand with a burn wound depth map. The output of the image processing is a 3D model file that represents the groove on the plastic object and thus the burned tissue area. One dimensional sliced sections of the designed model and reconstructed model are compared to evaluate the accuracy of the reconstruction methodology. Finally, the 3D CAD model is designed with a prescribed internal tissue scaffold structure and sent to the dedicated software of the 3D printing system to print the design of the virtual skin graft with biocompatible material poly-ε-caprolactone (PCL).

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Rodrigues Henriques, Joselito, Reiner Anderl e Marco Grimm. "Analysis of Enterprise Rights Management Solutions for CAD Data According to the Requirements of the Automotive Industry and a Proposal to Increase the ERM Security Level". In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-40669.

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The use of computer aided design (CAD) for product development is well-established. Without this technology, it would be impossible to maintain the speed and quality of products in the collaborative product development process. When CAD technology was first introduced, it was only possible to include simple geometrical elements to represent the product in the CAD system. With the evolution of CAD systems much more information was added to the CAD files such as: model history, manufacturing information, material and others. With this information a lot of intellectual property is saved inside the CAD files. If, on one hand, the integration of the intellectual property to CAD data speeds up the product development, and makes it possible to integrate the different areas of the companies like development and manufacturing; on the other hand, this leads to general danger for the companies, because the CAD data must be shared inside and outside of the company. Nowadays, in most companies which are exchanging data, the security is just kept by contracts, laws and technical mechanisms that do not guarantee the security of the data being exchanged. As soon as the data crosses the border of the company there is no way to control the data anymore. One way to guarantee the security of the data exchanged is to ensure that only authorized people, no matter where they are located, can access distributed data. This is provided by Enterprise Rights Management (ERM), which protects the data as soon as it is created. ERM technology controls digital data, even after it has crossed the borders of the company. The owner of the data to be shared can control its rights by several approvals that can be granted or denied, e.g. who is allowed to work with the data, how long it can be accessed, which actions can be performed, and others. This paper analyzes two of the current ERM solutions for protecting CAD data according to the requirements of the automotive industry. It shows, that the analyzed ERM systems are protecting CAD data only on a file-based level and do not provide granular protection which is necessary to meet the automotive industry’s requirements. In order to furthermore increase security of CAD data, this paper also presents a proposal which extends the current file-based protection to a granular protection.

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Wilson, Christopher G., Robert Dean, George T. Flowers e John Y. Hung. "A Technique for Embedding SPICE in a Simulink Environment for MEMS Simulations". In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38394.

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Computer simulations are powerful tools in the designer’s toolbox, giving an estimate of what the device will actually do once realized. Two such tools, Simulink and SPICE are commonly used to design, simulate, and verify models in the mechanical and electronic domains, respectively. Challenges can arise, however, when attempting to simulate behaviors of hybrid systems that possies both electronic and mechancial subsystems. For example, in microelectromechanical systems (MEMS) designs, variable capacitors are frequent methods for sensing and actuating. While straightforward to model in Simulink, MEMS are not intuitive to model in SPICE, where the control electronics are simulated. On the other hand, SIMULINK is a less mature tool than SPICE for simulating electronic behaviors — SPICE already posseses large libraries of electronic device models. Thus, current MEMS designers lack a straightforward method to simulate and verify variable capacitors in a transient electronic circuit in SPICE, since the entire mechanical system must be converted from Simulink and verified. This paper presents a technique for embedding NGSPICE, an open-source SPICE implementation, inside a Simulink model via a S-function block, enabling a full system model for transient responses to be realized. A Level 2 M-file S-function block implements the calling and parsing of the associated electronic subsystem circuit file. The required modifications for the circuit file to the Simulink model are described. Validation testing using a low-pass filter type circuits with constant and variable capacitance are presented. Some examples are presented and discussed.

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Vinayak, Sundar Murugappan, Cecil Piya e Karthik Ramani. "Handy-Potter: Rapid 3D Shape Exploration Through Natural Hand Motions". In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-71427.

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We present the paradigm of natural and exploratory shape modeling by introducing novel 3D interactions for creating, modifying and manipulating 3D shapes using arms and hands. Though current design tools provide complex modeling functionalities, they remain non-intuitive and require significant training since they segregate 3D shapes into hierarchical 2D inputs, thus binding the user to stringent procedural steps and making modifications cumbersome. In addition the designer knows what to design when they go to CAD systems and the creative exploration in design is lost. We present a shape creation paradigm as an exploration of creative imagination and externalization of shapes, particularly in the early phases of design. We integrate the capability of humans to express 3D shapes via hand-arm motions with traditional sweep surface representation to demonstrate rapid exploration of a rich variety of fairly complex 3D shapes. We track the skeleton of users using the depth data provided by low-cost depth sensing camera (Kinect™). Our modeling tool is configurable to provide a variety of implicit constraints for shape symmetry and resolution based on the position, orientation and speed of the arms. Intuitive strategies for coarse and fine shape modifications are also proposed. We conclusively demonstrate the creation of a wide variety of product concepts and show an average modeling time of a only few seconds while retaining the intuitiveness of communicating the design intent.

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Liu, H., K. Wu, P. Meusel, N. Seitz, G. Hirzinger, M. H. Jin, Y. W. Liu, S. W. Fan, T. Lan e Z. P. Chen. "Multisensory five-finger dexterous hand: The DLR/HIT Hand II". In 2008 IEEE/RSJ International Conference on Intelligent Robots and Systems. IEEE, 2008. http://dx.doi.org/10.1109/iros.2008.4650624.

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Luimula, Mika, Jere Ranta e Mazin Al-Adawi. "Hand Tracking in Fire Safety - Electric Cabin Fire Simulation". In 2020 11th IEEE International Conference on Cognitive Infocommunications (CogInfoCom). IEEE, 2020. http://dx.doi.org/10.1109/coginfocom50765.2020.9237818.

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Zhao, Jingdong, Li Jiang, Shicai Shi, Hegao Cai, Hong Liu e Gerd Hirzinger. "A Five-fingered Underactuated Prosthetic Hand System". In 2006 International Conference on Mechatronics and Automation. IEEE, 2006. http://dx.doi.org/10.1109/icma.2006.257843.

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Liu, H., K. Wu, P. Meusel, G. Hirzinger, M. H. Jin, Y. W. Liu, S. W. Fan, T. Lan e Z. P. Chen. "A dexterous humanoid five-fingered robotic hand". In 2008 RO-MAN: The 17th IEEE International Symposium on Robot and Human Interactive Communication. IEEE, 2008. http://dx.doi.org/10.1109/roman.2008.4600694.

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Laput, Gierad, e Chris Harrison. "Sensing Fine-Grained Hand Activity with Smartwatches". In CHI '19: CHI Conference on Human Factors in Computing Systems. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3290605.3300568.

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Rapporti di organizzazioni sul tema "Hand file"

Glosson, Charles R. The Effects of Ni-Ti Hand Files, Ni-Ti Engine Files, and K-Flex Files on Root Canal Morphology. Fort Belvoir, VA: Defense Technical Information Center, settembre 1992. http://dx.doi.org/10.21236/ada267888.

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Christensen, Eric W., e Heidi L. Golding. Hard-to-Fill Billets, Individual Assignment Preferences, and Continuation. Fort Belvoir, VA: Defense Technical Information Center, luglio 2002. http://dx.doi.org/10.21236/ada409322.

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Darwish, Abdalla. Optical Characterization of Pulse Laser Deposition of Thin Film of Hard Materials Using RHEED and AFM Techniques (DURIP). Fort Belvoir, VA: Defense Technical Information Center, settembre 2011. http://dx.doi.org/10.21236/ada566253.

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Pritchett, Lant, e Martina Viarengo. Learning Outcomes in Developing Countries: Four Hard Lessons from PISA-D. Research on Improving Systems of Education (RISE), aprile 2021. http://dx.doi.org/10.35489/bsg-rise-wp_2021/069.

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The learning crisis in developing countries is increasingly acknowledged (World Bank, 2018). The UN’s Sustainable Development Goals (SDG) include goals and targets for universal learning and the World Bank has adopted a goal of eliminating learning poverty. We use student level PISA-D results for seven countries (Cambodia, Ecuador, Guatemala, Honduras, Paraguay, Senegal, and Zambia) to examine inequality in learning outcomes at the global, country, and student level for public school students. We examine learning inequality using five dimensions of potential social disadvantage measured in PISA: sex, rurality, home language, immigrant status, and socio-economic status (SES)—using the PISA measure of ESCS (Economic, Social, and Cultural Status) to measure SES. We document four important facts. First, with the exception of Ecuador, less than a third of the advantaged (male, urban, native, home speakers of the language of instruction) and ESCS elite (plus 2 standard deviations above the mean) children enrolled in public schools in PISA-D countries reach the SDG minimal target of PISA level 2 or higher in mathematics (with similarly low levels for reading and science). Even if learning differentials of enrolled students along all five dimensions of disadvantage were eliminated, the vast majority of children in these countries would not reach the SDG minimum targets. Second, the inequality in learning outcomes of the in-school children who were assessed by the PISA by household ESCS is mostly smaller in these less developed countries than in OECD or high-performing non-OECD countries. If the PISA-D countries had the same relationship of learning to ESCS as Denmark (as an example of a typical OECD country) or Vietnam (a high-performing developing country) their enrolled ESCS disadvantaged children would do worse, not better, than they actually do. Third, the disadvantages in learning outcomes along four characteristics: sex, rurality, home language, and being an immigrant country are absolutely large, but still small compared to the enormous gap between the advantaged, ESCS average students, and the SDG minimums. Given the massive global inequalities, remediating within-country inequalities in learning, while undoubtedly important for equity and justice, leads to only modest gains towards the SDG targets. Fourth, even including both public and private school students, there are strikingly few children in PISA-D countries at high levels of performance. The absolute number of children at PISA level 4 or above (reached by roughly 30 percent of OECD children) in the low performing PISA-D countries is less than a few thousand individuals, sometimes only a few hundred—in some subjects and countries just double or single digits. These four hard lessons from PISA-D reinforce the need to address global equity by “raising the floor” and targeting low learning levels (Crouch and Rolleston, 2017; Crouch, Rolleston, and Gustafsson, 2020). As Vietnam and other recent successes show, this can be done in developing country settings if education systems align around learning to improve the effectiveness of the teaching and learning processes to improve early learning of foundational skills.

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Douglas, Thomas A., Christopher A. Hiemstra, Stephanie P. Saari, Kevin L. Bjella, Seth W. Campbell, M. Torre Jorgenson, Dana R. N. Brown e Anna K. Liljedahl. Degrading Permafrost Mapped with Electrical Resistivity Tomography, Airborne Imagery and LiDAR, and Seasonal Thaw Measurements. U.S. Army Engineer Research and Development Center, luglio 2021. http://dx.doi.org/10.21079/11681/41185.

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Accurate identification of the relationships between permafrost extent and landscape patterns helps develop airborne geophysical or remote sensing tools to map permafrost in remote locations or across large areas. These tools are particularly applicable in discontinuous permafrost where climate warming or disturbances such as human development or fire can lead to rapid permafrost degradation. We linked field-based geophysical, point-scale, and imagery surveying measurements to map permafrost at five fire scars on the Tanana Flats in central Alaska. Ground-based elevation surveys, seasonal thaw-depth profiles, and electrical resistivity tomography (ERT) measurements were combined with airborne imagery and light detection and ranging (LiDAR) to identify relationships between permafrost geomorphology and elapsed time since fire disturbance. ERT was a robust technique for mapping the presence or absence of permafrost because of the marked difference in resistivity values for frozen versus unfrozen material. There was no clear relationship between elapsed time since fire and permafrost extent at our sites. The transition zone boundaries between permafrost soils and unfrozen soils in the collapse-scar bogs at our sites had complex and unpredictable morphologies, suggesting attempts to quantify the presence or absence of permafrost using aerial measurements alone could lead to incomplete results. The results from our study indicated limitations in being able to apply airborne surveying measurements at the landscape scale toward accurately estimating permafrost extent.

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Anders, S., T. Stammler, C. S. Bhatia, J. Stoehr, W. Fong, C. Y. Chen e D. B. Bogy. Study of hard disk and slider surfaces using X-ray photoemission electron microscopy and near-edge X-ray absorption fine structure spectroscopy. Office of Scientific and Technical Information (OSTI), aprile 1998. http://dx.doi.org/10.2172/674744.

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Aromolaran, Adebayo B., e Milu Muyanga. Impact of COVID-19 on Food Systems and Rural Livelihoods in Nigeria. Institute of Development Studies (IDS), settembre 2020. http://dx.doi.org/10.19088/apra.2020.005.

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This report presents an early assessment of the impacts of the COVID-19 pandemic on agricultural commercialisation, food and nutrition security, labour and employment, and poverty and well-being in rural Nigeria. Data was collected from a stratified random sample of 110 respondent households drawn from five Local Government Areas (LGAs) in Ogun (Ijebu East, Obafemi Owode, and Imeko Afon) and Kaduna (Chikun and Soba) States. At the time of the survey, these LGAs had reported a small number of COVID-19 cases. The survey data is complemented by insights from five in-depth key informant interviews conducted in the LGAs. The APRA COVID-19 data collection will be carried out over three rounds. This report presents insights obtained from the first round implemented during mid-July 2020.

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Kumar, Indraneel, Lionel Beaulieu, Annie Cruz-Porter, Chun Song, Benjamin St. Germain e Andrey Zhalnin. An Assessment of the Workforce and Occupations in the Highway, Street, and Bridge Construction Industries in Indiana. Purdue University, 2020. http://dx.doi.org/10.5703/1288284315018.

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This project explores workforce and occupations within the highway, street, and bridge construction industries (NAICS 237310) in Indiana. There are five specific deliverable comprised of three data reports, one policy document, and a website. The first data report includes an assessment of the workforce based on the eight-part framework, which are industry, occupations, job postings, hard-to-fill jobs, Classification of Instructional Programs (CIP), GAP Analysis, compatibility, and automation. The report defines a cluster followed by a detailed analysis of the occupations, skills, job postings, etc., in the NAICS 237310 industry in Indiana. The report makes use of specialized labor market databases, such as the Economic Modeling Specialists International (EMSI), CHMURA JobsEQ, etc. The analysis is based only on the jobs covered under the unemployment insurance or the Quarterly Census of Employment and Wages (QCEW) data. The second data report analyzes jobs to jobs flows to and from the construction industry in Indiana, with a particular emphasis on the Great Recession, by utilizing the Bureau of Labor Statistics (BLS) data. The third data report looks into the equal employment opportunity or Section 1391 and 1392 data for Indiana and analyzes specific characteristics of that data. The policy report includes a set of recommendations for workforce development for INDOT and a summary of the three data reports. The key data on occupations within the NAICS 237310 are provided in an interactive website. The website provides a data dashboard for individual INDOT Districts. The policy document recommends steps for development of the highways, streets and bridges construction workforce in INDOT Districts.

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Amzeri, Achmad, B. S. DARYONO e M. SYAFII. GENOTYPE BY ENVIRONMENT AND STABILITY ANALYSES OF DRYLAND MAIZE HYBRIDS. SABRAO Journal of Breeding and Genetics, settembre 2020. http://dx.doi.org/10.21107/amzeri.2020.2.

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The phenotypic analysis of new candidate varieties at multiple locations could provide information on the stability of their genotypes. We evaluated the stability of 11 maize hybrid candidates in five districts in East Java Province, Indonesia. Maize hybrids with high yield potential and early maturity traits derived from a diallel cross were planted in a randomized complete block design with two checks (Srikandi Kuning and BISI-2) as a single factor with four replicates. The observed traits were grain yield per hectare and harvest age. The effects of environment, genotype, and genotype × environment interaction on yield were highly significant (P < 0.01). KTM-1, KTM-2, KTM-4, KTM-5, and KTM-6 showed higher average grain yield per hectare than the checks (Srikandi Kuning = 8.49 ton ha−1 and BISI-2 = 7.32 ton ha−1) at five different locations. The average harvest age of 11 candidates was less than 100 days. KTM-4 and KTM-5 had production yields that were higher than the average yield of all genotypes in all environments (Yi > 7.78 tons ha−1) and were considered stable on the basis of three stability parameters, i.e., Finlay–Wilkinson, Eberhart–Russell, and additive main effect multiplicative interaction (AMMI). KTM-2 had the highest yield among all tested genotypes (9.33 ton ha−1) and was considered as stable on the basis of AMMI but not on the basis of Finlay–Wilkinson and Eberhart–Russell. KTM-1 performed well only in Pamekasan, whereas KTM-6 performed well only in Sampang. Thus, these two genotypes could be targeted for these specific locations.

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Aguilar Herrera, María Alejandra, e Alba Paula Granados Agüero. Inclusion of human, ethnic and gender rights in the Nationally Determined Contributions (NDCs) of Colombia and Peru (in Spanish). Rights and Resources Initiative, marzo 2021. http://dx.doi.org/10.53892/zltf9832.

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In December 2015, the Paris Agreement was adopted at the 21st Conference of the Parties (COP21) of the United Nations Framework Convention on Climate Change (UNFCCC). Five years after the submission the NDC proposals and their initial implementation, signatory countries had to update and share the progress of their NDCs in 2020. This study carried out by Asociación Ambiente y Sociedad, ONAMIAP (National Organization of Andean and Amazonian Indigenous Women of Peru) and RRI analyzes the degree that human rights, women’s rights, and the rights of Indigenous Peoples and Afro-descendants are included in the NDCs of Colombia and Peru, as well as in the processes related to updating them.

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