scholarly journals Innovative productivity improvements in forest operations: a comparative study of the Assortment Grapple using a machine simulator

2020 ◽  
Vol 66 (No. 11) ◽  
pp. 443-451
Author(s):  
Jussi Manner ◽  
Simon Berg ◽  
Martin Englund ◽  
Back Tomas Ersson ◽  
Anders Mörk
Keyword(s):  
Comparative Study ◽  
Forest Operations ◽  
Development Potential ◽  
Extra Time ◽  
Time Consumption ◽  
Lost Time ◽  
Time Required

Because of generally small log piles, loading forwarders during thinning is time consuming. The Assortment Grapple, an innovative grapple with an extra pair of claws which facilitates the handling of two assortments during one loading crane cycle, has been designed to decrease forwarders’ loading time consumption. A standardized experiment was performed in a virtual thinning stand using a machine simulator with the objectives to form guidelines for working with the Assortment Grapple and to analyse its development potential. Four experienced operators participated in the study. According to the results, the Assortment Grapple’s accumulating function is beneficial only when there are no remaining trees between piles loaded during the same crane cycle. In such cases, none of participating operators lost time, and 3 of 4 operators saved time notably. The problem with the remaining trees is the extra time required to steer the crane tip around them. Therefore, a harvester should place those log piles that are later to be forwarded together in the same space with no remaining trees between the piles. Furthermore, we recommend that the Assortment Grapple’s usability will be improved by adding an own rocker switch on the forwarder’s controls to command the extra claws.

Comparative study of the underlay and overlay techniques of myringoplasty in large and subtotal perforations of the tympanic membrane

2003 ◽  
Vol 117 (6) ◽  
pp. 444-448 ◽  
Author(s):  
Mangal Singh ◽  
Ashutosh Rai ◽  
Sarmishtha Bandyopadhyay ◽  
S. C. Gupta
Keyword(s):  
Comparative Study ◽  
Prospective Study ◽  
Tympanic Membrane ◽  
Influencing Factors ◽  
Ossicular Chain ◽  
Time Consumption ◽  
Hearing Gain ◽  
Established Procedure ◽  
Graft Take ◽  
Overlay Technique

Myringoplasty is an established procedure. However, the quest is on to improve the results further by studying the different influencing factors, that could possibly affect the outcome. In the present randomized prospective study of one year’s duration, 60 patients having dry, large and subtotal perforations of the tympanic membrane were subjected to myringoplasty, 30 by the overlay technique and 30 by the underlay technique keeping all other influencing factors constant. The graft take-up rate was found to be the same (93.3 per cent) in both techniques but the underlay technique was judged to be better because of its technical ease, better assessment of ossicular chain integrity and mobility, less time consumption (55 minutes vs 90 minutes), earlier healing of graft (four to six weeks vs six to eight weeks), hearing gain in more patients (92.8 per cent vs 57.1 per cent) and fewer minor complications (6.6 per cent vs 33.3 per cent).

“PROSPECTIVE RANDOMISED COMPARATIVE STUDY OF USE OF FIBRIN GLUE VS. TACKERS AS METHOD OF MESH FIXATION IN LAPAROSCOPIC TRANSABDOMINAL PRE-PERITONEAL (TAPP) HERNIA REPAIR”

2021 ◽  
pp. 73-75
Author(s):  
Ashish Andhare ◽  
Hari S. Mahobia ◽  
Abhishek Bansal
Keyword(s):  
Postoperative Pain ◽  
Hernia Repair ◽  
Comparative Study ◽  
Hospital Stay ◽  
Length Of Hospital Stay ◽  
Hernia Recurrence ◽  
Seroma Formation ◽  
Group B ◽  
Time Required

BACKGROUND: Fixation of mesh in pre-peritoneal space is an important step in laparoscopic TAPP hernia repair. Mesh dislocation is one of the most frequent causes responsible for recurrence. Of the many factors inuencing postoperative pain, the technique of xation has been reported to be one of the most signicant determinants. So mesh xation with adhesives instead of mechanical devices has been proposed as a mean to reduce the incidence of postoperative pain. AIM: To compare clinical outcome and morbidity of xation of mesh using brin glue and tackers in trans-abdominal pre-peritoneal inguinal hernia repair METHODOLOGY: We did a prospective randomized comparative study in which we enrolled 50 patients undergoing laparoscopic hernia repair (TAPP). Those who met our inclusion criteria were randomized for study purpose after obtaining informed consent, in 25 patients mesh xed with tackers (group A) and in other 25 patients mesh xed with brin glue (group B). Patients were compared for intraoperative time required for mesh xation, early and late postoperative pain, time required to resume normal daily physical activity, length of hospital stay, hernia recurrence and seroma formation. Postoperative follow up was done up to six months. RESULTS: Two groups were comparable in terms of demographic variables. We observed that postoperative pain, time required resuming normal daily activity and incidence of seroma formation was less in group B (Mesh xed with glue). There was no signicant difference in length of hospital stay in both groups and no evidence of hernia recurrence in both groups during follow up period. CONCLUSION: It can be concluded that xation of mesh with brin glue when compared with tackers, seems to reduce postoperative pain, time to resume daily activities and incidence of seroma formation with no difference in length of hospital stay, early hernia recurrence with longer operative time.

scholarly journals Closure of skin in surgical wounds with skin stapler and conventional sutures: a comparative study

2021 ◽  
Vol 9 (1) ◽  
pp. 66
Author(s):  
Pinky Rabha ◽  
Shradha Srinivas ◽  
K. Bhuyan
Keyword(s):  
Comparative Study ◽  
Skin Closure ◽  
Aesthetic Outcome ◽  
Chi Square ◽  
Surgical Wounds ◽  
Operative Complications ◽  
Chi Square Test ◽  
Test Of Significance ◽  
Time Required ◽  
Post Operative Complications

Background: Application of suture is the technique of choice for apposition of skin edges in surgical wounds. The same procedure performed with application of staplers is faster and produce better cosmetic outcomes. A comparative study between conventional suture and stapler closure of skin in abdominal surgical wounds was undertaken to study the merits and demerits of the techniques. The aim was to study the time required for closure of surgical wounds, aesthetic outcome, post-operative complications and patient’s compliance.Methods: This was a single centre, prospective, observational study, conducted upon 100 patients undergoing abdominal surgeries. 50 patients were selected for skin closure of surgical wounds with stapler and the other 50 patients for closure with conventional nylon sutures. Data were collected for time required for closure of skin, aesthetic outcome, post-operative complications and patient’s compliance for both the groups for comparison. Data were analysed using student t test for comparison and chi square test of significance. Results: There was significant better results in stapler group in terms of cosmetic outcome (96% vs 88%, p<0.001), time taken during closure (60 vs 219 seconds, p<0.001) and patient’s compliance VAS of 1.44 vs 4.58 p<0.001).Conclusions: Closure of skin with stapler is a faster method. Patient’s compliance with stapler closure is better. It produces cosmetically acceptable scar and less discomfort or pain during its removal.

scholarly journals Causes of Delay for Construction Projects

2021 ◽  
Vol 23 (09) ◽  
pp. 1073-1077
Author(s):  
Shankar C ◽  
◽  
Saranya K ◽  
Col Jacob G Podipara ◽  
V S Srinithee ◽  
...  
Keyword(s):  
Construction Projects ◽  
Cost Overrun ◽  
Extra Time ◽  
Completion Date ◽  
Time Required

Delay can be delay can be defined as the extra time required or incurred either beyond the stipulated completion date or beyond the date that the project stakeholders agreed upon for the completion of the project. The various effects of delay include time overrun, cost overrun, dispute, Total abandonment, Litigation, Arbitration. The objective this study is to review various journals on causes of delay for construction projects. Hence in this paper a number journals are summarized and suggestion for reducing delay in construction is given.

A comparative study of gametophyte development of the diploid and tetraploid races of Polypodium virginianum

1974 ◽  
Vol 52 (1) ◽  
pp. 91-96 ◽  
Author(s):  
L. S. Kott ◽  
R. L. Peterson
Keyword(s):  
Comparative Study ◽  
Sexual Maturity ◽  
Germination Rate ◽  
Gametophyte Development ◽  
Rate Of Development ◽  
Fern Species ◽  
Morphological Differences ◽  
Time Required ◽  
Developmental Features

Three different cytotypes, diploid, triploid, and tetraploid, occur within the fern species Polypodium virginianum or rock polypody. Previous studies have shown morphological differences in the sporophyte and this study was undertaken to determine the distinctiveness of the gametophyte of these cytotypes. The cytotypes differ in several developmental features: percentage of viable spores produced, time required for germination to take place, and time required for the gametophytes to reach sexual maturity. Of the three cytotypes, the tetraploid had a higher germination rate and considerably faster rate of development than either the diploid or triploid. The triploid showed a high percentage of aborted spores and a slow and irregular development of the gametophyte.

Stapled Versus Hand-Sewn Anastomosis in Colorectal Cancer Surgery : A comparative study

2013 ◽  
Vol 12 (3) ◽  
pp. 56-61 ◽  
Author(s):  
Jawhar Lal Singha ◽  
Zahidul Haq ◽  
MA Majid
Keyword(s):  
Comparative Study ◽  
Hospital Stay ◽  
Treatment Plan ◽  
Colorectal Anastomosis ◽  
Cancer Surgery ◽  
University Hospital ◽  
Anastomotic Site ◽  
Colon And Rectal Cancer ◽  
Significant Difference ◽  
Time Required

Introduction: In spite of long journey of intestinal anastomotic techniques surgeons still are not free from doubt about the leakage after colorectal anastomosis. In distal rectal anastomosis after cancer surgery it poses more risk due to poor colonic vascularity and reduced remaining tissue to nourish the anastomotic site. Exploration of surgical staplers has provided some procedural advantages and sense of security to surgeons as well as to patients in respect to sphincter saving and thereby improving quality of life. However, outcome measures of these devices should be made to see its efficacy over conventional hand-sewn technique because their cost play role in treatment plan. The result of such comparative study may help surgeons to counsel the patients. Objectives: To find out whether stapled anastomosis is safer than hand-sewn anastomosis in colon and rectal cancer surgery. methods: The quasi-experimental study was undertaken in the department of general and colorectal surgery, Bangabandu Sheikh Mujib Medical University hospital during Feb 2005 to June 2008. Total 100 patients were selected. 48 patients underwent ‘Stapled’ and 52 underwent ‘Hand-sewn’ anastomosis. The patients were treated and postoperatively managed by same colorectal surgeon. The outcome variables were ‘time required for anastomoses, ‘postoperative hospital stay’ and early and late ‘complications’ in postoperative and follow-up period. Result and observation: The age, sex, socioeconomic status or co-morbidities did not show any statistical difference between two groups as in the hospital stay (p=.821). The time required for anastomosis showed strongly significant difference (18.17 min and 26.85 min; p=.000) in favor of stapling group. The hemorrhage from anastomotic line (p=1.00), anastomotic leakage (p=.413), ileus/ obstruction (p=.640) and wound dehiscence (p=.640) were much less in stapled group though they lack statistical power. All others except anastomotic stenosis (p=.514) showed almost similar results. Conclusion: Considering user perspective, time requirement and postoperative complications stapling technique appear to be safer and superior to hand-sewn technique though it demands statistical strengthening on large scale study. Chattagram Maa-O-Shishu Hospital Medical College Journal Volume 12, Issue 3, September 2013: 56-61

scholarly journals Comparative study of wound sequlae in layer closure and retention closure of midline laparotomy

2019 ◽  
Vol 6 (9) ◽  
pp. 3316
Author(s):  
Euvalingam D. ◽  
Sendhil Nathan
Keyword(s):  
Comparative Study ◽  
Outcome Measures ◽  
Wound Closure ◽  
Single Layer ◽  
Complication Rates ◽  
Closure Technique ◽  
Midline Laparotomy ◽  
Suture Group ◽  
Group A ◽  
Time Required

Background: Layered closure of the abdomen has been considered to be ideal until recently however single layer mass (retention) closure technique, in which all the layers of the abdominal wall are closed in single layer is being increasingly used by surgeons. We conducted this study to analyze outcome measures in patients in whom wound closure was done by retention closure and layered closure.Methods: This was a prospective comparative study in which 60 patients undergoing elective or emergency laparotomy were included on the basis of a predefined inclusion and exclusion criteria. In 30 cases (50%) layer closure was done whereas in remaining 30 (50%) patients retention closure technique was used. Major outcome measures studied were time required for wound closure and post-operative complications.Results: Out of 60 studied cases there were 42 (70%) males and 18 (30%) females with M: F ratio of 1: 0.42.The time required for closure in layered suture group (group A) was 26.76±3.36 whereas in case of retention closure suturing it was 19.36±4.35. The difference was found to be statistically highly significant (p<0.0001). The complications rates were found to be statistically significantly higher in layer suturing (Group A) as compared to retention suture group (Group B).Conclusions: We conclude that retention suturing is preferable as compared to layered suturing in patients undergoing midline laparotomy in terms of time required for closure of wound and post-operative complication rates.

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