Relevant bibliographies by topics / Lifting index

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Lifting index'

Author: Grafiati
Published: 7 June 2025
Last updated: 16 July 2025

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Journal articles on the topic "Lifting index"

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Battevi, Natale, Monica Pandolfi, and Ivan Cortinovis. "Variable Lifting Index for Manual-Lifting Risk Assessment." Human Factors: The Journal of the Human Factors and Ergonomics Society 58, no. 5 (2016): 712–25. http://dx.doi.org/10.1177/0018720816637538.

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Waters, Thomas, Enrico Occhipinti, Daniela Colombini, Enrique Alvarez-Casado, and Robert Fox. "Variable Lifting Index (VLI)." Human Factors: The Journal of the Human Factors and Ergonomics Society 58, no. 5 (2015): 695–711. http://dx.doi.org/10.1177/0018720815612256.

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Dahniar, Tedi, and Dhiah Budhi Leksonowati. "ANALISA POSTUR KERJA KARYAWAN BAGIAN PICK UP DI PT. JALUR NUGRAHA EKAKURIR (JNE) CABANG KAYON, CINERE DENGAN METODE NIOSH." Teknologi : Jurnal Ilmiah dan Teknologi 1, no. 2 (2019): 103. http://dx.doi.org/10.32493/teknologi.v1i2.3081.

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Pekerjaan mengangkat merupakan pekerjaan yang memiliki risiko yang tinggi untuk terkena cidera akibat kerja, jika pekerjaan tersebut dilakukan berulang-ulang. Di PT. Jalur Nugraha Ekakurir (JNE) pengangkatan paket adalah salah satu pekerjaan yang dilakukan setiap hari sehingga penulis mengambil risiko ergonomi yang mungkin didapat oleh para karyawan tersebut dengan mengunakan metode NIOSH. Hasil penelitian Lifting Index (LI) pada nomor pengangkatan 1 sebelum perbaikan 3.9 setelah perbaikan menjadi 0.56, nomor pengangkatan 2 sebelum perbaikan 6.04 setelah perbaikan 0.92, nomor pengangkatan 3 sebelum pengangkatan 5.07 setelah perbaikan 0.92 sedangkan hasil penelitian Composite Lifting Index (CLI) sebelum perbaikan 7.4 setelah perbaikan 1. Berdasarkan perhitungan Lifting index (LI) melebihi 1 dan Composite Lifting Index (CLI) melebihi 3 sehingga memiliki risiko kerja yang tinggi maka, dilakukan usulan perbaikan postur kerja dan setelah perbaikan postur kerja menghasilkan Lifting index (LI) kurang dari 1 dan Composite lifting Index (CLI) 1 yang berarti pengangkatan paket aman untuk dikerjakan.
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Garg, Arun, and Jay M. Kapellusch. "The Cumulative Lifting Index (CULI) for the Revised NIOSH Lifting Equation." Human Factors: The Journal of the Human Factors and Ergonomics Society 58, no. 5 (2016): 683–94. http://dx.doi.org/10.1177/0018720815627405.

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Sun, Zeng Shou, Ke Ju Fan, Xu Guang Yin, and Peng Jie Han. "The Research of Civil Structural Damage Identification Based on Lifting Wavelet Entropy Index." Advanced Materials Research 291-294 (July 2011): 2041–48. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.2041.

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The failure of civil engineering structure will lead to heavy losses. So, identifying structural damage is necessary as early as possible. The excellent localization performance of lifting wavelet transform will facilitate significantly damage diagnosis. On the base of wavelet energy distribution of structural acceleration response, taking advantage of characteristics of lifting wavelet and entropy, the structural damage identification method based on lifting wavelet entropy is proposed in this paper. And the lifting wavelet time entropy index and the relative lifting wavelet entropy index are established. The new method and damage indexes are verified in numerical simulation and laboratory test of simple beam. The analysis results show that lifting wavelet time entropy can identify structural damage moment and the relative lifting wavelet entropy can identify structural damage location. The feasibility of method proposed is instructed.
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Adellian, Nugraha, and Widajati Noeroel. "Ergonomic risks in manual material handling activities and musculoskeletal disorders complaints in the animal feed industry production area in East Java, Indonesia." World Journal of Advanced Research and Reviews 22, no. 1 (2024): 1028–34. https://doi.org/10.5281/zenodo.14212720.

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Introduction: Manual lifting and load transfer processes that are not carried out properly will result in over exertion-lifting and carrying, i.e. body tissue damage caused by excessive lifting. One of the work-related diseases caused by this activity is Musculoskeletal Disorders (MSDs), a disorder that occurs in the muscles, nerves, tendons, ligaments, joints, cartilages, or the intervertebral discs. The study aims to find out the picture of ergonomic risk in manual material handling activity and musculoskeletal complaints. Methods: Data was obtained from two respondents through accidental sampling. The measurement of the lifting index is done with meters and calculated using the formula of the calculation of the lifting index. The instrument for measuring musculoskeletal disorders was the GOTRAK SNI 9011:2021 Questionnaire. Results: Lifting activities performed by the Hand Add section (LI: 3.054-3.228) and Bagging Off (LI: 3.073-3.470) have a Lifting Index value that is in category > 3 so the interpreted activity has a high risk of causing musculoskeletal complaints.  Workers who perform manual material handling activities have high complaints of skeletal and muscle disorders in the upper limbs. Conclusion: Manual handling activities performed in the industry have a high risk of causing injury. Workers who perform manual material handling activities are known to have high complaints of muscle and muscle disorders in the upper limbs.
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Yeung, Simon S., James Deddens, Ash M. Genaidy, Waldemar Karwowski, and P. C. Leung. "Theoretical and experimental evaluation of the multiplicative lifting equation and the general lifting index." Occupational Ergonomics 6, no. 1 (2006): 13–24. http://dx.doi.org/10.3233/oer-2006-6102.

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The Revised NIOSH Lifting Equation [13] integrated the findings of different approaches reported in the scientific literature into a single mathematical formulation based on the empirical model proposed by Drury and Pfeil [5]. This simple model was tested on a limited basis and the model generalizations have not been examined. The primary objectives of this study were to investigate the performance of the NIOSH lifting equation with general formulations reported by Karwowski [7], and to examine the structure of the lifting index and the relative importance of physical factors (as defined by the lifting index) and non-physical factors (as defined by perceived risk of injury and work dissatisfaction) with respect to workers' perceived effort associated with the lifting conditions. A cross-sectional study was conducted on 217 experienced manual handling workers in the Hong Kong area to validate the study objectives. In this investigation, information was collected on lifting task parameters, perceived effort, perceived risk of injury, and work dissatisfaction. The results suggest that a multiplicative model is better than an additive model in evaluating the effort associated with lifting task performance. In this regard, the exponents of the parameters in the lifting index should be different from 1.0. The best model for evaluating effort emerged from perceived risk of injury and the general lifting index (GLI). Given the limitations of our observational study, the main findings from this research suggest that the multiplicative structure of the NIOSH lifting equation is better than an additive model. In addition, the weighing of lifting task multipliers may need further investigation, and the study of manual lifting tasks should include both physical and non-physical factors when examining the etiologic factors leading to musculoskeletal symptoms and disorders.
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Zhang, Xudong, Maury A. Nussbaum, and Don B. Chaffin. "Back Lift versus Leg Lift: A Dynamic Lifting Strategy Index." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 42, no. 12 (1998): 891–95. http://dx.doi.org/10.1177/154193129804201211.

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This paper presents an index that quantitatively characterizes different dynamic postural strategies employed during sagittal plane lifting. The dynamic lifting strategy is analyzed in the velocity domain as a strategy of partitioning postural changes between the torso and leg segments. The index consists of two parameters, assigned to two leg segments, which quantify their contributions relative to the torso. Parameter values, ranging from 0.1 to 10, are estimated through a simple enumeration search. The use of this index is illustrated by applying it to 24 lifting movements performed by six subjects using either a back-lift or a leg-lift strategy. Results suggest that a lifting strategy, in terms of whether the leg or the back is the prime mover, can be well characterized by this simple two-parameter index. It not only differentiates the two distinct general postural strategies, but also discerns non-distinct intermediate ones by quantifying the involvement of each segment in a lifting movement.
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Suwaryo Nugroho and Kristanto Mulyono. "Hubungan antara lifting index dengan pengeluaran energi pada pengangkatan beban 18 Kg di PT XYZ." JENIUS : Jurnal Terapan Teknik Industri 6, no. 1 (2025): 46–56. https://doi.org/10.37373/jenius.v6i1.308.

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Sumber Daya Manusia merupakan komponen utama dari keberlangsungan sebuah perusahaan, salah satu hal yang perlu diperhatikan perusahaan yaitu beban kerja yang diterima oleh para pekerjanya. Beban kerja juga berkaitan dengan jumlah kalori yang dibutuhkan oleh seorang pekerja, untuk mengetahui kebutuhan kalori dengan beban kerja sesuai atau tidak dapat dilakukan dengan menghitung jumlah denyut nadi pekerja sebelum dan sesudah melakukan aktivitas kerja. Penelitian ini bertujuan untuk menganalisa beban kerja dengan pendekatan Recommended Weight Limit dan Lifting Index. Hasil penelitian pada pengangkatan beban 18 kg menunjukan bahwa denyut nadi kerja termasuk kategori level moderate atau sedang yang artinya masih aman dan dalam batas wajar, sedangkan nilai Recommended Weight Limit sebesar 3,457 dan nilai Lifting Index sebesar 5,20 yang mana ini mengidentifikasikan bahwa pekerjaan tersebut beresiko menyebabkan cidera, maka diperlukan adanya penelitian lebih lanjut agar nilai Lifting Index dapat mencapai dibawah 1 dari batas aman yang ditetapkan oleh NIOSH. Hubungan antara Lifting Index dan konsumsi energi adalah semakin tinggi nilai Lifting Index maka semakin banyak pula konsumsi energinya. Kedua nya adalah dua hal yang saling berhubungan.
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Tetteh, Emmanuel, Pramiti Sarker, Colten Fales, Jeff Mettler, and Gary Mirka. "Inter-individual variability in a repetitive lifting task." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 65, no. 1 (2021): 833–37. http://dx.doi.org/10.1177/1071181321651284.

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Trunk kinematics directly impact the biomechanical loading of the tissues of the low back. Quantifying the variability in trunk kinematics may provide deeper insights into biomechanical loading and low back injury risk. Inter-lifter variability in trunk kinematics was assessed as twenty participants performed a repetitive lifting task at three levels of the NIOSH Lifting Index. Trunk kinematics were captured and Levene’s test of homogeneity of variance was used to test the hypothesis that variance in kinematic parameters increased as a function of level of lifting index. Results showed considerable levels of variability in all kinematics parameters, and for sagittal range of motion, mean sagittal velocity, transverse range of motion, and mean transverse velocity the variance was significantly affected (p<0.05) by level of lifting index. The results of this study demonstrate that variability (both inter- and intra-lifter) should be considered as one considers the relative risk of a lifting task.
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Dissertations / Theses on the topic "Lifting index"

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Peeni, Manu H. "The effects of the front squat and back squat on vertical jump and lower body power index of Division 1 male volleyball players /." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1892.pdf.

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PANDOLFI, MONICA. "STUDIO DELL¿ASSOCIAZIONE TRA INDICE DI RISCHIO DA SOVRACCARICO BIOMECCANICO DEL RACHIDE, VALUTATO CON METODO NIOSH-VARIABLE LIFTING INDEX, E LOMBALGIA ACUTA." Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/486815.

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Objective: The aim of this study was to evaluate the efficacy of the new variable lifting index (VLI) method, theoretically based on the Revised National Institute for Occupational Safety and Health [NIOSH] Lifting Equation (RNLE), in predicting the risk of acute low-back pain (LBP) in the past 12 months. Background: A new risk variable termed the VLI for assessing variable manual lifting has been developed, but there has been no epidemiological study that evaluates the relationship between the VLI and LBP. Method: A sample of 3,402 study participants from 16 companies in different industrial sectors was analyzed. Of the participants, 2,374 were in the risk exposure group involving manual materials handling (MMH), and 1,028 were in the control group without MMH. The VLI was calculated for each participant in the exposure group using a systematic approach. LBP information was collected by occupational physicians at the study sites. The risk of acute LBP was estimated by calculating the odds ratio (OR) between levels of the risk exposure and the control group using a logistic regression analysis. Both crude and adjusted ORs for body mass index, gender, and age were analyzed. Results: Both crude and adjusted ORs showed a dose-response relationship. As the levels of VLI increased, the risk of LBP increased. This risk relationship existed when VLI was greater than 1. Conclusion: The VLI method can be used to assess the risk of acute LBP, although further studies are needed to confirm the outcome and to define better VLI categories.
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Bumpers, Erica L. Azinger Albert T. "Lifting up their voices factors influencing the decisions made by African Americans to attend or not attend college /." Normal, Ill. : Illinois State University, 2006. http://proquest.umi.com/pqdweb?index=0&did=1225152921&SrchMode=1&sid=3&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1177270852&clientId=43838.

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Thesis (Ph. D.)--Illinois State University, 2006.<br>Title from title page screen, viewed on April 22, 2007. Dissertation Committee: Albert T. Azinger (chair), Amee D. Atkins, Dianne C. Gardner, Beth Hatt-Echeverria. Includes bibliographical references (leaves 129-141) and abstract. Also available in print.
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Book chapters on the topic "Lifting index"

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Alvarez-Casado, E. "Utility Analysis of the Application of the Variable Lifting Index (VLI)." In Advances in Intelligent Systems and Computing. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-96083-8_63.

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Kalita, M., R. Borah, and N. Bhattacharyya. "Determination of Lifting Index for Paddy Storage Activity Performed by Farm Women." In Technology-Enabled Work-System Design. Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-1884-0_4.

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Kalita, M., R. Borah, and N. Bhattacharyya. "Determination of Lifting Index for Paddy Storage Activity in the Use of Modified Bamboo Basket by Farm Women." In Design Science and Innovation. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7361-0_11.

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"Index." In Lifting the Shadow. Rutgers University Press, 2024. http://dx.doi.org/10.36019/9781978842663-012.

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"Index." In Lifting the Shadow. Rutgers University Press, 2024. http://dx.doi.org/10.2307/jj.18654626.13.

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"Index." In Lifting Our Voices. Columbia University Press, 2008. http://dx.doi.org/10.7312/beck14060-014.

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"INDEX." In Lifting Every Voice. University of Virginia Press, 2022. https://doi.org/10.2307/jj.26526661.37.

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"Index." In Still Lifting, Still Climbing. New York University Press, 2022. http://dx.doi.org/10.18574/nyu/9780814786802.003.0024.

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"Index of Subjects." In Lifting the Veil. De Gruyter, 2015. http://dx.doi.org/10.1515/9783110368963-011.

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"Index of Ancient Sources." In Lifting the Veil. De Gruyter, 2015. http://dx.doi.org/10.1515/9783110368963-009.

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Conference papers on the topic "Lifting index"

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Muratore, Antonino, Giuseppe Giannelli, Vincenzo Nastasi, Giuseppe Sferruzza, and Giovanni Grillone. "Index Method for Risk Assessment Using Load Lifting (Crane) and People Lifting (MEWP) Equipment." In Proceedings of the 31st European Safety and Reliability Conference. Research Publishing Services, 2021. http://dx.doi.org/10.3850/978-981-18-2016-8_240-cd.

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Jimmy, Dorcas, Emenike Wami, and Michael Ifeanyi Ogba. "Cuttings Lifting Coefficient Model: A Criteria for Cuttings Lifting and Hole Cleaning Quality of Mud in Drilling Optimization." In SPE Nigeria Annual International Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/212004-ms.

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Abstract In this study, the hole cleaning qualities of mud samples formulated with tigernut derivatives – starch and fibre – as additives were determined by adding drill cuttings as impurities and evaluating the Carrying Capacity Index (CCI) as well as Transport Index (TI) of the muds. Results of the analysis conducted for the mud properties showed that all the different mud properties but the pH of the mud evaluated of mud samples B, C1, C2, and C3 were slightly higher (albeit within the recommended values) than those of the control (standard) mud sample A. Using the results obtained from mud properties analysis and drilling operations data for the evaluation of the hole cleaning qualities, the following new expressions for optimum cuttings lifting ability (β) and cuttings lifting coefficient (β1), which gives criteria for cutting lifting in a wellbore were developed: β1 = 0.11519 [(1 − Cf)]−1(dp)−2.014. The higher the value of β1 greater than one, the better the hole cleaning ability of the mud and the lower the mud flowrate needed to achieve better hole cleaning for a given cutting particle size.
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Hafez, Khaled. "The Influence of Lifting Horizontal Distance Measurement Error on NIOSH Lifting Equation Assessment Outcomes." In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1002610.

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Low back injuries are becoming increasingly costly due to the compensation costs and lost days of work. Most of these injuries are linked to manual material handling (MMH) activities. Several ergonomic assessment methods are available to assess the risk factors and determine the risk level for a given MMH job. The National Institute for Occupational Safety and Health (NIOSH) Lifting Equation is the most popular and frequently used ergonomic assessment method to assess MMH jobs. The load weight and horizontal distance are the most significant low back pain risk factors in such jobs. Errors in the measurements of load horizontal distance may influence the risk level obtained from the NIOSH Lifting Equation assessment method depending on the weight of the load being handled. Measurements of the horizontal distance variable measured by novice college students were used to examine NIOSH Lifting Equation sensitivity to the horizontal distance measurement errors with respect to the load weight. The results showed that even though errors in the horizontal distance measurements influenced the resulted lifting index values, that did not influence the resulting NIOSH Lifting Equation risk assessment outcomes for almost all lifting conditions.
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Imtihan, Miftahul, Suwaryo Nugroho, Kristanto Mulyono, and Annisa Nurul Islami. "Workload analysis of manual epoxy packing line process using NIOSH lifting index method." In THE 3RD INTERNATIONAL CONFERENCE ON ENGINEERING AND APPLIED SCIENCES (THE 3rd InCEAS) 2021. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0107801.

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Forgione, Chiara, Francesco Lolli, Antonio Maria Coruzzolo, Rita Gamberini, and Elia Balugani. "AzKCLI: a semi-automatic tool for Compositive Lifting Index (CLI) evaluation through Azure Kinect." In 15th International Conference on Applied Human Factors and Ergonomics (AHFE 2024). AHFE International, 2024. http://dx.doi.org/10.54941/ahfe1005177.

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In modern production systems, prioritizing the safety and well-being of human operator is crucial. Industry 5.0 responds to this need by giving significant importance to the Human Factor (HF) and ergonomics. Our work introduces a semi-automatic tool for Compositive Lifting Index (CLI) calculation for risk detection during multi-task manual lift jobs using the Azure Kinect depth cameras named AzKCLI. We conducted 20 simulations of industrial tasks in our laboratory with a risk assessment from both AzKCLI and expert ergonomic judgment. Additionally, we simulated three tasks taken from the paper that introduced CLI for comparative analysis. Findings reveal a strong agreement between assessments, proposing a novel semi-automatic tool that offers a more objective, economically efficient, and a rapid evaluation of multi-task manual lifting jobs, thus contributing to enhance workplace safety in the Industry 5.0 era.
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Maria Coruzzolo, Antonio, Chiara Forgione, Christian Di Natali, and Francesco Lolli. "Ergonomic risk reduction in picking activities: evaluation of an active exoskeleton through Azure Kinect." In 15th International Conference on Applied Human Factors and Ergonomics (AHFE 2024). AHFE International, 2024. http://dx.doi.org/10.54941/ahfe1005184.

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Reducing the ergonomic risk involved in picking activities is fundamental to ensure the health of the workers by minimizing the occurrence of musculoskeletal disorders. Recently exoskeletons have been introduced to support workers and reduce the overload. In this paper exploiting a depth camera we evaluated the risk involved in picking activities with and without the support of an active exoskeleton. For the scope 5 different subjects performed 42 lifting actions with and without the active exoskeleton for a total of 420 total lifts. The task was to reproduce a real logistical scenario of palletizing boxes in the laboratory. The lifting actions were recorded in a laboratory setting with the Azure Kinect depth camera benchmarking the posture with and without the active exoskeleton. For the risk assessment we exploited a tool based on the Azure Kinect to automatically calculate the NIOSH lifting equation named AzKNIOSH. Results statistically demonstrated that the exoskeleton does not affect the posture during the lift while it has a beneficial effect on the lifting index considering a decreased load weight.
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Mousa, A. A., A. Abdelazim, F. Youssef, M. Elkody, and N. Farag. "Rejuvenating Mature Field Production Through Optimized Artificial Lifting Methods." In Mediterranean Offshore Conference. SPE, 2024. http://dx.doi.org/10.2118/223322-ms.

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Abstract Marina oil production Company aiming to enhance oil recovery factor, which represents percentage of economically recoverable original oil in place by changing the artificial lift technology in the Sidi Rahman brownfield. Improving the recovery factor help increase the field's overall production and extend its productive life. The Company has established a technical team consists of members from different disciplines. The team conducted a comprehensive study, re-evaluated the reservoir characteristics, original oil in place and remaining reserves in each reservoir sand, to maximize the recovery factor. To increase oil production, reduce operating costs, and evaluate new infill drilling opportunities. The main challenges that the wells encounter Multilayer reservoirs and the existing artificial lift system (Sucker Rod Pump) cannot establish higher draw down in high productivity index reservoirs due to the limitation of downhole pump size (through tubing pump, not bigger than 2.25") to allow zones with different reservoir pressure to contribute its production, despite the fluid level is near by the surface. Hence, it is decided to replace the existing Artificial lift method by an electrical submersible pump (ESP), to create a higher drawdown and increase production rate. A work over campaign was successfully executed and converted the two sucker pump wells to produce by electrical submersible pumps. The results of ESP installation and commissioning were amazing and indicated a significant increase in Marina Company production from 130 to 1000 BOPD. Oil production increasing approximately by 660 % from company production prior the workover campaign, in addition to a significant decrease in operating cost from approximately 38 to 15 USD / bbl. oil through first year of implementation. The new artificial lift method (ESP), successes in enhancing contribution from multiple zones with different reservoir pressures and contributed in increasing the recovery factor by 7 % during this period.
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Li, Yi-Chun, Steven A. Lavender, Raghu N. Natarajan, Gunnar B. J. Andersson, and Faird M. L. Amirouche. "Evaluation of the Revised NIOSH Lifting Equation (1991): On the Asymmetric Multiplier." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0439.

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Abstract The NIOSH 1981 lifting equation (NIOSH, 1981) [1] is based on biomechanical, physiological, psychophysical, and epidemiological criteria in order to identify the risk of low back injuries in bi-manual lifting. The 1991 revised lifting equation [2] expands the application scope of the 1981 equation for evaluating asymmetrical lifting tasks, lifts of objects with less than optimal hand-container couplings, and a larger range of work duration and lifting frequencies; also, the load constant is reduced from 40 kg to 23 kg; the Lifting Index (LI) and the Recommended Weight Limit (RWL) replace the Maximal Permissible Limit (MPL) and Action Limit to indicate the potential risk. LI is an actual lifted weight and uses RWL as its unit. If LI &amp;lt; 1, it assumes that more than 99% of males and 75% of females are capable of performing the lifting task and the risk of causing low back injury is nominal. If LI &amp;lt; 3, it assumes that less than 25% of males and 1% of females are capable of performing the lifting task, and a greater percentage of manual materials handling workers is likely to be at risk of developing low back pain. Waters et al. (1993) [3] noted that although the 1991 equation has not been fully validated, the recommended weight limits derived from the revised equation are consistent with or lower than those generally reported in the literature. Hidalgo et al. (1995) [4] showed that the results of cross-validation of the NIOSH limits for psychophysical criterion confirmed the validity of assumptions made in the 1991 NIOSH revised lifting equation and for the biomechanical and physiological criteria which were not in total agreement. This validation was based on the psychophysical, biomechanical and physiological data recently published in the subject literature (Genaidy et al. 1990, Snook and Ciriello 1991, Genaidy et al. 1993, Asfour et al. 1991) [2]. Most of the validation limit in the sagittal plane lifting and 3.4 KN compressive force on the spine is the standard line in biomechanical criteria. The 1991 revised NIOSH lifting equation recommended that the allowable weight of lift be reduced by about 30% for lifts involving asymmetric twists of 90 degrees (Water et al., 1993), which considers asymmetric multiplier in the sagittal lifts as 1 and 90 degrees lifts as 0.7, and linearly reduced between the sagittal lifts and 90 degrees lifts. This maximum acceptable lifting capacity is applied not only in the heavier loads but also in the lighter loads. The hypothesis in evaluating NIOSH lifting equation on the asymmetric multiplier is that asymmetric multiplier may be appropriate adopted in the heavier loads (LI = 3) but will be improper applied in the lighter loads (LI = 1). Several types of data, static and dynamic data of the L5/S1 forces, moments, and compressive forces, are observed.
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Ying Kwan, Mei, Kit Lun Yick, Joanne Yip, and Chi Yung Tse. "Intervention of arch support: A quantitative study." In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1002593.

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Hallux valgus is a common foot deformity characterized by hypermobility of the first metatarsal ray. The lower longitudinal arch is an intrinsic factor related to the lateral drift of the hallux. This paper conducted a quantitative study on the improvement of the first metatarsal and arch condition by arch support and used finite element analysis to simulate the bone displacement with the intervention of arch support. In this research, a foot arch support made of carbon fiber was developed and seventy-six female subjects were recruited for a two-month wear trial. Footprints of their dominant foot were measured to investigate the effect of the arch support on lifting the arch and correcting the hallux valgus pathology. Different foot parameters including foot length, foot breadth, heel breadth, arch angle, arch breadth, plantar arch index, foot type index, and hallux valgus angle were also compared. By using finite element analysis, the biomechanical effects of the arch support on the foot structure can be visualized. According to the results of the wear trial, the use of the arch support can significantly improve the arch curvature of the foot, while no significant correction of the hallux valgus angle was found. Among the arch parameters, the arch breadth and the foot type index are the key indicators to precisely characterize foot types and arch conditions. When a clear outline of the footprint is not available, arch breadth provides reliable association with the foot type index (R2 = 0.928). An arch breadth ≥ 4 cm is categorized as flatfoot. This article confirms the effectiveness of our arch support in lifting the arch over a two-month period and provides a scientific surrogate index to aid in diagnosis, which is important for therapeutic and diagnostic applications.
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Pacheco a, Felicidade, Matilde A. Rodrigues a, and Pedro R. R. Monteirob. "Psychophysical Responses of Waste Workers in Lifting Tasks at Two Different Levels." In Applied Human Factors and Ergonomics Conference. AHFE International, 2018. http://dx.doi.org/10.54941/ahfe100087.

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Manual Material Handling (MMH) is one of the key problems related to musculoskeletal disorders at the occupational settings. It is essential to assess the risk related to these tasks. The psychophysical approach can be used to assess and redesign the MMH tasks. Following a psychophysical approach and bearing in mind the specific problem faced by waste workers in a Portuguese hospital, this work aimed to determine, the Maximum Acceptable Weight (MAW) for the tasks of BIOBOX’s lifting. Two different levels of BIOBOX’s were assessed based on workers’ usual tasks. The subjects were instructed to lift the box from the height of 110 cm and 174 cm (handling height) up to the height of 84 cm, the same height of the truck. Each set of experiments was conducted for 10 minutes. The heart rate was continuously monitored. At the end of each task, the MAW was achieved and subjects were requested to assess the Index of Perceived Exertion (IPE). The MAW determined at 110 cm and 174 cm was, respectively, 10.0 kg and 6.8 kg. The regions of the shoulders, arms and back were identified as presenting more pain during the tasks. The results show that workers are at risk of musculoskeletal disorders. Therefore, a strategy to reduce the risk related to these tasks is needed.
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