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Simulating a harvester-forwarder softwood thinning: a software evaluation

, : Simulating a harvester-forwarder softwood thinning: a software evaluation. Forest Products Journal 47(5): 36-41

A discrete-event simulation model of a mechanized forest harvest system was evaluated with special attention given to the effectiveness of using statistical distributions derived from field-study data as input. The simulation language, Promodel PC, demonstrated the wide variability in weekly production that can be expected even under similar operating conditions. The simulation model was particularly well suited to tracking the flow of materials during the processing steps. Because the field-study data had been collected without anticipating its use as input to a simulation model, the capability of the model to simulate different operation situations was severely limited. A process in which data collection and model building are interactive is recommended for improving both field studies and simulations.


Other references

Takano, A.; Niimi, H.; Atarashi, Y.; Sawasaki, T.; Terasaki, T.; Nakabayashi, T.; Kitajima, I.; Tobe, K.; Takahara, T., 2012: A novel Y231del mutation of HFE in hereditary haemochromatosis provides in vivo evidence that the Huh-7 is a human haemochromatotic cell line. Hereditary haemochromatosis (HH), which is mainly associated with a C282Y polymorphism in HFE, is common among Caucasians of north European descent, but is very rare among Asians. Herein, we report a 43-year-old Japanese man who was diagnosed as h...

Saks, V.N.; Belov, N.A.; Lapina, N.N., 1955: Current representations of the geology of the central Arctic. Priroda 44(7): 13-22

Sarah, J.L.; Pinochet, J.; Stanton, J., 1996: The burrowing nematode of bananas, Radopholus similis Cobb, 1913. A short account of R. similis is given covering its biology, pathogenicity and control. A request by the author for root samples infested with the nematode is made.

Metzler-Nolte, N., 2001: Labeling of Biomolecules for Medicinal Applications-Bioorganometallic Chemistry at Its Best The author thanks A. P. Schubiger and D. Grotjahn for reprints, and K. Severin for insightful discussions. The data in Figure 1 are used with the help and kind permission of M. Salmain and G. Jaouen. I am also grateful to Drs. H. & H. Weiss for their hospitality when writing this article. Angewandte Chemie 40(6): 1040-1043

Bourque, H., 1991: Time to say Whoa on the Tangipahoa. Soil and water conservation news US Deptartment of Agriculture Soil Conservation Service 11(8): 4

Azanan, M.Shafiq.; Abdullah, N.Kamila.; Chua, L.Ling.; Lum, S.Han.; Abdul Ghafar, S.Syahirah.; Kamarulzaman, A.; Kamaruzzaman, S.; Lewin, S.R.; Woo, Y.Ling.; Ariffin, H.; Rajasuriar, R., 2016: Immunity in young adult survivors of childhood leukemia is similar to the elderly rather than age-matched controls: Role of cytomegalovirus. Many treatment complications that occur late in childhood cancer survivors resemble age-related comorbidities observed in the elderly. An immune phenotype characterized by increased immune activation, systemic inflammation, and accumulation of lat...

Barlovatz., 1927: Low Magnifications in Practical Microscopy. Whereas in the laboratory the microscope is used for the thorough examination of organisms, its use in general diagnostic work is some-thing quite different. Here the aim is the rapid detection of organisms whose presence is suspected. In the fiel...

Anderson, R.C.; Rehders, M.; Yu, P-Lam., 2008: Antimicrobial fragments of the pro-region of cathelicidins and other immune peptides. In addition to the numerous cathelicidin peptides that are associated with the antimicrobial activity exhibited by a crude extract from ovine blood, a further three peptides with antimicrobial activity have been identified. These were part of the...

Abdulagatov Ilmutdin M.; Azizov Nazim D., 2006: Densities and apparent molar volumes of concentrated aqueous LiCl solutions at high temperatures and high pressures. A constant-volume piezometer immersed in a precision liquid thermostat was used to measure the densities of aqueous LiCl solutions from 0.129 to 15.498 mol kg (super -1) , 291.25 to 607.71 K, and 0.961 to 30.55 MPa. The total uncertainties of dens...

Krafft W.; Behling H.; Brueckmann D., 1986: About usefulness of cytological examinations of abdominal fluid for control of patients with ovarian cancer. A report is given about the efficacy of cytology which is gathered by transvaginal punction and lavage of the abdominal cavity in 95 patients with ovarian cancer treated before. The cytological findings were the following: Cytological examinations...