Modelling of Hydraulic Forest Boom Tip Acceleration Control to Counterbalance the Gravitational Load Force in Horizontal Timber Cutting

2001 ◽  
Author(s):  
Juha Inberg ◽  
Jouni Mattila ◽  
Tapio Virvalo
Keyword(s):  
Gravitational Force ◽  
Design Tool ◽  
Cutting Process ◽  
Load Force ◽  
Significant Feature ◽  
Cutting Surface ◽  
Model Derivation ◽  
And Performance ◽  
And Control

Abstract This paper concentrates on the forest machines, which are working in the cut-to-length method. The cutting function is an essential part of a harvester’s work in the cut-to-length method. The quality of cutting is the most significant feature of a cut. Trees should be cut without causing damage, especially end checks, to the cutting surface of wood. Nowadays end checks of logs are main problem of the cutting process. It has been observed that end checks are found in as many as 70% of the logs. The cutting damages reduce the amount of useful material and cause considerable economical loss to the sawmill and veneer industries. The study deals with the boom lowering function, which is a potential solution to avoid cutting damages during the timber cutting process. The purpose is to momentarily counterbalance the gravitational force of a log during the cross-cut. This paper presents model derivation and analysis of the kinematics, dynamics and hydraulics of the studied forest boom. The paper also shows that the model can be used as a design tool to examine the influences of hydraulics and control system to the behaviour and performance of boom tip acceleration control in a horizontal timber cutting in future studies.

scholarly journals Índice de Governança Corporativa, Desempenho e Valor da Firma no Brasil

2005 ◽  
Vol 3 (1) ◽  
pp. 1 ◽  
Author(s):  
André Luiz Carvalhal da Silva ◽  
Ricardo Pereira Câmara Leal
Keyword(s):  
Corporate Governance ◽  
Return On Assets ◽  
Good Corporate Governance ◽  
Total Capital ◽  
Significant Difference ◽  
Governance Practices ◽  
And Performance ◽  
And Control ◽  
High Degree

This study investigates the relationship between the quality of a firms corporate governance practices and its valuation and performance, through the construction of a broad firm-specific corporate governance index for Brazilian listed companies. The empirical results indicate a high degree of ownership and control concentration. We can also note a significant difference between the voting and total capital owned by the largest shareholders, mainly through the existence of non-voting shares. Panel data results indicate that less than 4% of Brazilian firms have good corporate governance practices, and that firms with better corporate governance have significantly higher performance (return on assets). There is also positive relationship between Tobin’s Q and better corporate governance practices although the results are not statistically significant.

scholarly journals Pengaruh Parameter Pemesinan terhadap Kualitas Hasil Potong Mesin Bubut Maximat V13 pada Benda Kerja Poros PVC

2019 ◽  
Vol 2 (02) ◽  
pp. 19-24
Author(s):  
Kasijanto Kasijanto ◽  
Sadar Wahjudi ◽  
Listiyono Listiyono ◽  
Muhammad Fakhruddin
Keyword(s):  
Metal Cutting ◽  
Cutting Process ◽  
Machining Process ◽  
Work Piece ◽  
Machining Processes ◽  
Cutting Surface ◽  
Spindle Rotation ◽  
Feeding Speed ◽  
Tool Types

Metal cutting process (cutting process) is to cut metal to get the shape and size and quality of the planned cutting surface. The metal cutting process is carried out with special tools, according to the type of cutting process. So the tools for one process cannot be used in another process, even for similar processes, the tools cannot be exchanged if the cutting plans are not the same. Lathe process is a machining process to produce cylindrical machine parts which are carried out using a Lathe. Its basic form can be defined as the machining process of the outer surface of cylindrical or flat lathe objects. Polyvinyl Chloride, commonly abbreviated as PVC, is the third-order thermoplastic polymer in terms of total usage in the world, after Polyethylene (PE) and Polypropylene (PP). Worldwide, more than 50% of PVC produced is used in construction. PVC is produced by polymerizing vinyl chloride monomers (CH2 = CHCl). Because 57% of its mass is chlorine, PVC is the polymer that uses the lowest petroleum feedstock among other polymers. This research follows up the selection of configuration of the lathe machining process using plastic work pieces. In this study, Maximat V13 lathe and PVC type plastic were used. The variation of machining processes are spindle rotation (320, 540, and 900 rpm), feeding speed (0.07, 0.14, and 0.28), the use of tool types (carbide and HSS) and cooling (without cooling, coolant, and oil). So, with this research, it is expected that the optimal parameters in determining the configuration of the lathe machining process on a PVC work piece to produce a good turning surface can be achieved  

scholarly journals ARSITEKTUR DAN INFORMASI KINERJA: SUATU UPAYA MENINGKATKAN KUALITAS PENGANGGARAN INSTANSI PEMERINTAH (STUDI KASUS PADA BALAI DIKLAT KEUANGAN MAKASSAR)

INFO ARTHA ◽  
2018 ◽  
Vol 2 (1) ◽  
pp. 1-10
Author(s):  
Ali Tafriji Biswan ◽  
Priscilla Oktiva Rossari ◽  
Fajar Alhadi Alhadi
Keyword(s):  
Best Practices ◽  
Fiscal Year ◽  
Performance Information ◽  
Strategic Objectives ◽  
Planning And Control ◽  
Public Sector Organizations ◽  
The Government ◽  
And Performance ◽  
And Control

ABSTRACTBudgeting is an important tool used by the management in carrying out the functions of planning and control, no exception to public sector organizations and government. The Indonesian government continues to implement the best practices of budgeting, one of which is through the implementation of performance-based budgeting.In a performance-based budgeting, the budget is prepared by formulating outputs or outcomes to be achieved. This formulation is done by the respective ministries/agencies in accordance with the functions of their respective organizations. All information related to the performance of then integrated into a document Work Plan and Budget-Ministry/Agency (RKA-K/L) as the basis of discussion of the budget document by the legislative board. However, in practice, ministries/agencies have not been able to compile performance information appropriately. The quality of outputs and outcomes compiled considered not in accordance with the strategic objectives and functions of the ministries/agencies concerned. Another problem related to budgeting is improper planning which led to the absorption of current year's budget to less than optimal. Through this paper, researchers will present problems related to the issue of the budget that comes from the weakness of the architecture and performance information on the ministries/agencies. Responding to the challenges of the need of better budgeting, the government began compiling Arsitektur dan Informasi Kinerja (ADIK) to improve the application of performance-based budgeting approach before. ADIK implementation on Financial Training Center of Makassar gives an overview effort of applying this new architecture. It is expected the new budgeting architecture implemented during Fiscal Year 2016 increases the optimum benefits. Keywords: budgeting, performance-based budgeting, performance information, ADIK. ABSTRAKPenganggaran merupakan alat penting bagi manajemen organisasi, tidak  terkecuali organisasi sektor publik, dalam menjalankan fungsi perencanaan dan pengendalian. Instansi pemerintah terus berupaya mengelola praktik terbaik penganggaran, salah satunya adalah melalui penganggaran berbasis kinerja (PBK).Dalam PBK, anggaran disusun dengan merumuskan output atau outcome yang hendak dicapai. Perumusan ini dilakukan oleh kementerian/lembaga sesuai dengan fungsi organisasi masing-masing. Seluruh informasi kinerja diintegrasikan menjadi sebuah dokumen Rencana Kerja dan Anggaran Kementerian Negara/Lembaga (RKA- K/L) sebagai dokumen dasar pembahasan anggaran dengan badan legislatif. Namun pada praktiknya, kementerian/lembaga belum mampu menyusun informasi kinerja dengan tepat. Kualitas output dan outcome yang disusun belum sepenuhnya sesuai dengan sasaran strategis dan fungsi kementerian/lembaga yang bersangkutan. Masalah itu terkait erat dengan perencanaan yang kurang baik sehingga penyerapan anggaran kurang tepat sasaran.Melalui tulisan ini, dipaparkan isu permasalahan terkait anggaran yang bersumber dari lemahnya bangunan informasi kinerja pada kementerian/lembaga. Menjawab tantangan penganggaran yang lebih baik, pemerintah mulai menyusun Arsitektur dan Informasi Kinerja (ADIK) untuk mempertajam penerapan PBK. Penerapan ADIK pada Balai Diklat Keuangan Makassar memberikan gambaran upaya penerapan arsitektur yang baru ini. Diharapkan arsitektur penganggaran baru yang diimplementasikan mulai Tahun Anggaran 2016 ini meningkatkan manfaat penganggaran yang lebih optimal. Kata kunci: anggaran, PBK, informasi kinerja, ADIK.

scholarly journals Effect of End-of-Life Nursing Education on the Knowledge and Performance of Nurses in the Intensive Care Unit: A Quasi-Experimental Study

2021 ◽  
Author(s):  
Sima Sadat Ghaemizade Shushtari ◽  
Shahram Molavynejad ◽  
Mohammad Adineh ◽  
Mohsen Savaie ◽  
Asaad Sharhani
Keyword(s):  
Palliative Care ◽  
Nursing Education ◽  
End Of Life ◽  
Nursing Care ◽  
Self Assessment ◽  
Care Education ◽  
Quasi Experimental ◽  
And Performance ◽  
And Control

Abstract Background: End-of-life care education is required for nurses to acquire the clinical competence necessary for the improvement of the quality of end-of-life nursing care. The aim of this study was to determine the effect of nursing care education based on End-of-Life Nursing Education Consortium (ELNEC) on the knowledge and performance of nurses working in the intensive care unit (ICU).Materials and Methods: This quasi-experimental study was conducted with a pretest-posttest design. From among nurses working in the ICU of Golestan and Imam Khomeini hospitals in Ahvaz, Iran, 80 nurses were selected based on the inclusion criteria. They were randomly assigned to the intervention and control groups (40 people in each group) using a table of random numbers. Data were collected using a demographic characteristics form, the ELNEC Knowledge Assessment Test (ELNEC-KAT), ‎and the Program in Palliative Care Education and Practice Questionnaire (German Revised Version; PCEP-GR‎).Results: A significant difference was observed between the study groups in terms of the average knowledge score in all 9 modules including nursing care, pain management and control, disease symptom management, ethical/legal issues, culture, communication with the patient and his/her family, loss and grief, death, and quality of life (QOL) (P < 0.001). Moreover, the average performance score of nurses in the fields of preparation for providing palliative care, self-assessment of ability to communicate with dying patients and their relatives, self-assessment of knowledge and skills in palliative care increased significantly in the intervention group compared to the control group (P < 0.001).Conclusions: End-of-life nursing education is recommended as an effective method for promoting knowledge, attitude, performance, and clinical competence among all nurses involved in end-of-life care.

Weight-Perception-Based Model of Power Assist System for Lifting Objects

2009 ◽  
Vol 3 (6) ◽  
pp. 681-691 ◽  
Author(s):  
S. M. Mizanoor Rahman ◽  
◽  
Ryojun Ikeura ◽  
Masaya Nobe ◽  
Soichiro Hayakawa ◽  
...  
Keyword(s):  
Gravitational Force ◽  
Weight Perception ◽  
Inertial Force ◽  
Ease Of Use ◽  
Load Force ◽  
Military Operations ◽  
High Acceleration ◽  
Perceived Weight ◽  
Excessive Load ◽  
And Control

This paper deals with the design and control of a power assist system for lifting objects based on weight perception. We considered vertical lifting force (load force) as the desired dynamics for lifting objects with the power assist system. Load force consists of inertial force and gravitational force. We hypothesized that weight perception due to inertial force may differ from perceived weight due to gravitational force for lifting objects with a power assist system. Based on this hypothesis, we designed a 1-degree-of-freedom (DOF) (vertical up-down) power assist system and determined a psychophysical relationship between actual weights and power-assisted weights for lifted objects. We also determined the excess in the load forces that subjects applied when lifting objects with the system. The excessive load force causes problems such as sudden high acceleration of the lifted object, user safety and other concerns while lifting the object, loss of system maneuverability and stability, and possibly fatal accidents. We modified the power-assist control based on the psychophysical relationship and the load force characteristics. Modifying control reduced the excess in load forces and significantly enhanced maneuverability, naturalness, ease of use, stability, and safety. We proposed using the findings to design industrial power assist systems for transporting heavy objects in various industries such as assembly and manufacturing, mining, logistics and transport, construction, disaster management and rescue, and military operations.

scholarly journals Improving the Performance and Quality of Processes by Applying and Implementing Six Sigma Methodology in Furniture Manufacturing Process

2019 ◽  
Vol 70 (2) ◽  
pp. 193-202
Author(s):  
Ľubica Simanová ◽  
Andrea Sujová ◽  
Pavol Gejdoš
Keyword(s):  
Process Improvement ◽  
Six Sigma ◽  
Cost Savings ◽  
Furniture Manufacturing ◽  
Mapping Process ◽  
Six Sigma Methodology ◽  
And Performance ◽  
The Cost ◽  
And Control

The main aim of this paper is to illustrate the application of selected methods and procedures in the implementation of the Six Sigma Methodology in the furniture manufacturing processes, specifically in the wood veneer pressing, to verify the application and to evaluate the benefits of using selected methods and procedures through a series of step DMAIC process improvement. The application of selected methods and tools within the Six Sigma Methodology, such as DPMO, efficiency and sigma levels, project charter, histogram of mistakes caused by the application of the adhesive, the SIPOC plot mapping process, reaction plans, Ishikawa diagram and control diagrams bring the system and clarity of measurable results into project management for process improvement and process change. The benefits of their use are the cost savings and performance improvement processes.

scholarly journals RANCANG BANGUN DAN UJI KINERJA SISTEM KONTROL FERTIGASI DENGAN IRIGASI TETES

2018 ◽  
Vol 5 (1) ◽  
pp. 19
Author(s):  
Alfin Fajar ◽  
Sirajudin H Abdullah ◽  
Asih Priyati Priyati
Keyword(s):  
Solenoid Valve ◽  
Mixed Solution ◽  
Command Language ◽  
Nutrient Delivery ◽  
Nutritional Needs ◽  
Coefficient Of Uniformity ◽  
And Performance ◽  
The Cost ◽  
And Control

Kebutuhan nutrisi pada tanaman dalam bentuk unsur hara baik yang berasal dari tanah itu sendiri dan dari luar dalam bentuk pupuk mempengaruhi produktifitas tanaman.Komposisi dan kualitas tanah yang bervariasi berperan pada kesuburan tanaman sehingga diperlukan pengaturan dan pengontrolandalam memformulasikan pupuk yang optimal serta penjadwalan pemberian nutrisi bagi tanaman.Penerapan mikrokontroler pada sistem fertigasi dapat memungkinkan dalam mengontrol pemberian unsur hara secara otomatis berdasarkan perintah.Penerapan sistem fertigasi berbasis mikrokontroler dalam budidaya sayuran diharapkan dapat meningkatkan produktivitasnya dan dapat mengurangi penggunaan unsur hara yang berlebihan sehingga biaya dalam budidaya tanaman dapat ditekan serta untuk efisiensi tenaga kerja dan menghemat biaya.Penelitian ini bertujuan untuk merancang sistem fertigasi otomatis dengan acuan kendali On/Off pada kran otomatis solenoid valve, melakukan pengujian volume dan waktu pemberian fertigasi dengan irigasi tetes, danmenentukan formulasi larutan unsur hara sesuai dengan kebutuhan tanaman.Selama simulasi diasumsikan pada tanaman bayam yang harus diketahui terlebih dahulu jumlah kebutuhan air tanamannya dan kebutuhan nutrisi selama satu periode umur tanam. Metode yang digunakan dalam penelitian ini adalah metode eksperimental dengan penelitian langsung di laboratorium. Penelitian ini dilakukan di laboratorium Teknik dan Konservasi Lingkungan Pertanian dengan parameter yang diamati adalah debit emitter,koefisien keseragaman tetesan, Larutan AB mix dan penggunaan air, dan kinerja sistem kendali On/Off fertigasi sesuai dengan umur tanam dan kebutuhan tanaman.Dari hasil pengamatan, uji kinerja sistem kontrol bekerja dengan baik dengan melakukan setting point waktu sesuai yang diinginkan. Didapat sistem yang sangat baik untuk digunakan dengan rata-rata koefisien keseragaman irigasi CU sebesar 96,50% dan debit aliran penetes yang cukup stabil pada setiap perlakuan waktu dan volume; didapat kisaran debit 0,000140 l/detik – 0,000150 l/detik.The form of nutrients both derived from the soil itself and from outside, in the form of fertilizer, affect the productivity of plant. The various composition and quality of soil has role on plant fertily, therefore regulation and control in formulating optimal fertilizer and scheduling of nutrition for the plant were necessary. The aplication of microcontroller to the fertigation system might be possible in controlling nutrient delivery automatically usingdesigned command language. The aplication of microcontroller based fertilization system in plant cultivationis exected to increase the yieldand decrease the excessive use of nutrients, so that the cost could be supressed as well as labor efficiency and cost saving. The aim of this research was to design automatic fertigation system with on/off system referenceof automatic solenoid valve, testing the fertigation volume and time with drip irrigation and determine nutrient solution formulation according to plant requirement. During the simulation, it was assumed that the amount of crop water requirement and nutritional needs for spinach planting period must be determined in advance.The metode used in this study was experimental method with direct research in the laboratory. This research was conducted in Laboratory of Agricultural EnviromentEngineering and Conservation with parameters observed were emitter discharge, drip uniformitycoefficient,AB mixed solution and water used, and performance of the On/Off fertigation control system correspond with plant age and requirement. The observation showed that the control sytem worked well by applying the desired setting point. The coefficient of uniformity CU was 96.50% and the drip flow rate were relatively stable on each time and volume treatment; the discharge range was 0.000140 l/s – 0.000150 l/s.

scholarly journals The Effect of the Teach-Back Method on Knowledge, Performance, Readmission, and Quality of Life in Heart Failure Patients

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Ali Rahmani ◽  
Amir Vahedian-Azimi ◽  
Masoud Sirati-Nir ◽  
Reza Norouzadeh ◽  
Hamid Rozdar ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Heart Failure ◽  
Repeated Measures ◽  
Self Care ◽  
Patient Discharge ◽  
Heart Failure Patients ◽  
And Performance ◽  
Back Education ◽  
And Control

Background. Among chronic diseases, heart failure has always been a serious challenge imposing high costs on health systems and societies. Therefore, nurses should adopt new educational strategies to improve self-care behaviors and reduce the readmissions in heart failure patients. This study aimed to determine the effect of the teach-back method on knowledge, performance, readmission, and quality of life in these patients. Methods. This clinical trial was conducted in patients with heart failure (n = 70) hospitalized in the internal wards of the Baqiyatallah al-Azam Medical Center in Tehran (2019). Routine discharge educations were provided in control patients. Self-care topics were taught to the intervention groups by the teach-back method. A cardiac self-care questionnaire was used to assess the knowledge and practice of patients immediately after intervention and three months after patient discharge. Also, SF-36 was presented to each patient. Readmission(s) and quality of life were followed up by telephone interviews three months after patient discharge. Repeated measures analysis of variance and related post-hoc tests were performed for within-group comparisons before, immediately after, and 3 months after teach-back education. Wilks’ lambda multivariate tests were conducted for simultaneous comparison of quality of life subscales between intervention and control groups. Also, logistic regressions were after controlling for baseline measures and confounders. Results. Findings showed significant improvement in the patients’ knowledge and performance immediately after teach-back education, though this effect was slow in the long term after discharge. Also, the frequency of readmissions decreased and the quality of life (except physical function) increased in the patients through teach-back education. By controlling for the pretest effect, the posttest scores for the relevant components of the quality of life suggested improvement in both intervention and control patients. This improvement in the quality of life was confirmed by controlling for baseline measurements using binary logistic regression analysis. Conclusion. Teach-back education improved patients’ knowledge and performance, readmission frequency, and quality of life.

scholarly journals Study on the characteristics of mold in military aviation material warehouse

2021 ◽  
Vol 271 ◽  
pp. 04035
Author(s):  
Li Li ◽  
Zhao Hongqiang ◽  
Shi Yumin ◽  
Wang Jiongkun ◽  
Guo Xingxiang ◽  
...  
Keyword(s):  
Theoretical Basis ◽  
Aviation Material ◽  
Training Task ◽  
Combat Training ◽  
Military Aviation ◽  
And Performance ◽  
And Control ◽  
Micro Morphology

Aviation equipment warehouse is responsible for the combat training task of the army. The existence of mold in the warehouse reduces the quality and performance of equipment, and the quality of storage equipment directly affects the strength of aviation equipment support ability. In this paper, the main characteristics of storage mold were studied, the micro morphology and colony characteristics of storage mold were analyzed, and the main types of mold in aviation material warehouse were introduced, which provided a theoretical basis for further research on the growth and control of mold.

A Study of Knowledge-Based Simulation for Enterprise Resources Planning

2007 ◽  
Vol 06 (04) ◽  
pp. 241-249
Author(s):  
Chi Fai Cheung ◽  
Sui Hei Fung ◽  
S. K. Kwok ◽  
Wing Bun Lee ◽  
Burly Tan
Keyword(s):  
Business Environment ◽  
Erp System ◽  
Know How ◽  
Enterprise Resources Planning ◽  
Knowledge Based ◽  
Planning And Control ◽  
And Performance ◽  
And Control ◽  
Resources Planning

The conventional way of using the Enterprise Resources Planning (ERP) applications is inadequate for the highly dynamic, complex and demanding business environment. The efficient use of the ERP system relies heavily on the know-how, experience and quality of the users. Since the knowledge of operating ERP system is difficult to be acquired, shared and diffused among the users, it takes time and money to train well-experienced users. As a result, this paper presents a framework of Knowledge-based Simulation System for Enterprise Resources Planning named KBSimERP. The KBSimERP provides an integrated learning environment for achieving three perspectives, which includes the knowledge acquisition, knowledge diffusion and performance measurement perspectives respectively. Hence, a prototype of the KBSimERP is built for production planning and control, and the performance of the system is preliminarily evaluated. Satisfactory results are obtained.

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