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Combined effects of soil texture and machine operating trail gradient on changes in forest soil physical properties during ground-based skidding

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Pedosphere 2020年第4期30卷 508-516页

作者： Ramin NAGHDI ahmad solgi Eric R.LABELLE Mehrdad NIKOOY Department of Forestry Faculty of Natural ResourcesUniversity of GuilanSowmeh Sara 1144(Iran) Technical University of Munich Hans-Carl-von-Carlowitz-Platz 2Freising 85354(Germany)

Wood extraction by heavy machinery has always been associated with soil disturbance in mountain forests,and the degree of soil degradation is influenced by several factors,including site and soil characteristics,soil moisture,type of equipment used,and number of machine *** effects of ground-based skidding operations on the physical properties of soils with different texture were evaluated at different levels of traffic frequency and trail gradient at two sites in an Iranian temperate *** treatments included combinations of three different traffic frequencies(3,8,and 14 passes of a rubber-tired cable skidder),three levels of trail gradient(20%) and two soil texture classes,clay loam(Site 1) and sandy loam(Site 2).The average gravimetric soil moisture at the time of skidding was 23%(Site 1) and 20%(Site 2).The average dry bulk density and total porosity of the undisturbed soil(control) were0.71 g cm-3 and 73.3% at Site 1(clay loam) and 0.86 g cm-3and 59.1% at Site 2(sandy loam),*** site 1(fine-textured soil),rutting began after three passes of the skidder,whereas at site 2(coarse-textured soil),rutting occurred only after eight *** of the traffic frequency and trail gradient,machine impact on the fine-textured soil caused greater increases in bulk density and rut depth compared to that on the coarse-textured *** three skidder passes and independent from trail gradients,dry bulk density at Site 1 increased by 54.8% compared to that of the undisturbed control,and the increase was 45.5% at Site ***,medium to fine-textured soils are more susceptible to compaction than coarse-textured *** soils,especially when moist,should be protected using brush mats created from harvesting residues during the forest processing phase.

关键词： bulk density forest processing rutting soil compaction soil disturbance soil type total porosity

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Soil physical properties degrade further on skid trails in the year following operations

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Journal of Forestry Research 2018年第1期29卷 93-101页

作者： Ramin Naghdi ahmad solgi Eric K.Zenner Farshad Keivan Behjou Department of Forestry Faculty of Natural Resources University of Guilan Department of Ecosystem Science and Management Penn State UniversityUniversity Park Faculty of Agricultural Technology and Natural Resources University of Mohaghegh Ardabili

Short-term recovery of soil physical properties on skid trails was investigated upon cessation of skidding operations and 1 year later. Bulk density and porosity were assessed at three levels of traffic intensity and two slope gradients. Compared to undisturbed areas, bulk density increased, total porosity and macroporosity decreased, and microporosity increased in the compacted areas immediately after skidding. In all cases, changes were significantly greater when traffic intensity was higher and when slopes were steeper. Surface soil compaction did not show any recovery over the 1-year period, illustrating the persistent effects of compaction on soil structure. In fact, surficial compaction further increased and macroporosity further decreased after 1 year of recovery, compared to immediately after skidding. While these changes may reflect inherent small-scale site variability or differences in soil moisture content at times of sampling, direct negative physical impacts on newly exposed soil（such as by raindrops）, in addition to the loss of organic matter after canopy removal and skidding, likely delayed any physical recovery, particularly on heavily trafficked trails on steeper slopes. These results raise serious concerns about longterm resilience to traffic on forest soils and indicate the necessity to properly retire skid trails to avoid further soil degradation as trails age.

关键词： Compaction Porosity Recovery Skid trail slope Traffic frequency

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HLA class Ⅱ alleles and risk for peripheral neuropathy in type 2 diabetes patients

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Neural Regeneration Research 2016年第11期11卷 1839-1844页

作者： ahmad Marzban Javad Kiani Mehrdad Hajilooi Hamzeh Rezaei Zohreh Kahramfar Ghasem solgi Division of Endocrinology Department of Internal MedicineSchool of MedicineHamadan University of Medical Sciences Department of Immunology School of MedicineHamadan University of Medical Sciences Psoriasis Research Center Department of DermatologyFarshchian HospitalHamadan University of Medical Sciences

The potential impact of human leukocyte antigen （HLA） genotype variations on development of diabetic peripheral neuropathy （DPN） is not well determined. This study aimed to identify the association of HLA class II alleles with DPN in type 2 diabetes （T2D） patients. Totally 106 T2D patients, 49 with DPN and 57 without DPN, and 100 ethnic-matched healthy controls were analyzed. Both groups of the patients were matched based on sex, age, body mass index （BMI） and duration of T2D. Polyneuropathy was diagnosed using electrodiagnostic methods. HLA-DRB1 and DQB1 genotyping was performed in all subjects by the polymerase chain reaction with sequence-specific primers （PCR-SSP） method. T2D patients with DPN showed higher frequencies of HLA-DRB1＊10 and DRB1＊12 alleles compared to control group （P = 0.04）. HLA-DQB1＊02 allele and HLA-DRB1＊07-DQB1＊02 haplotype were associated with a decreased risk for developing DPN in T2D patients （P = 0.02 and P = 0.05 respectively）. Also, patients with severe neuropathy showed higher frequencies of DRB1＊07 （P = 0.003） and DQB1＊02 （P = 0.02） alleles than those with mild-to-moderate form of neuropathy. The distribution of DRB 1 and DQB 1 alleles and haplotypes were not statistically different between all patients and healthy controls. Our findings implicate a possible protective role of HLA-DQB1＊02 allele and HLA-DRB1＊07-DQB1＊02 haplotype against development of peripheral neuropathy in T2D patients. Therefore, variations in HLA genotypes might be used as genetic markers for prediction and potentially management of neuropathy in T2D patients.

关键词： nerve regeneration HLA-DRB1 HLA-DQB1 alleles genotypes haplotypes peripheral neuropathy type 2 diabetes neural regeneration

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Non-Monotonic Lyapunov-Krasovskii Functional Approach to Stability Analysis and Stabilization of Discrete Time-Delay Systems

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IEEE/CAA Journal of Automatica Sinica 2020年第3期7卷 752-763页

作者： Younes solgi Alireza Fatehi Ala Shariati Advanced Process Automation and Control Research Group Industrial Control Center of ExcellenceFaculty of Electrical EngineeringK.N.Toosi University of TechnologyTehran 16317-14191Iran IEEE

In this paper, a novel non-monotonic Lyapunov-Krasovskii functional approach is proposed to deal with the stability analysis and stabilization problem of linear discrete time-delay systems. This technique is utilized to relax the monotonic requirement of the Lyapunov-Krasovskii theorem. In this regard, the Lyapunov-Krasovskii functional is allowed to increase in a few steps, while being forced to be overall decreasing. As a result, it relays on a larger class of Lyapunov-Krasovskii functionals to provide stability of a state-delay system. To this end, using the non-monotonic Lyapunov-Krasovskii theorem, new sufficient conditions are derived regarding linear matrix inequalities(LMIs)to study the global asymptotic stability of state-delay ***, new stabilization conditions are also proposed for time-delay systems in this article. Both simulation and experimental results on a p H neutralizing process are provided to demonstrate the efficacy of the proposed method.

关键词： Linear matrix inequality(LMI) non-monotonic Lyapunov-Krasovskii functional(NMLKF) pH neutralization plant stabilization state-delay system time-delay system

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Novel Non-monotonic Lyapunov-Krasovskii Based Stability Analysis and Stabilization of Discrete State-delay System

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International Journal of Automation and computing 2020年第5期17卷 713-732页

作者： Younes solgi Alireza Fatehi Ala Shariati APAC Research Group Industrial Control Center of ExcellenceFaculty of Electrical EngineeringK.N.Toosi University of TechnologyTehran ***Iran

This paper proposes a novel less-conservative non-monotonic Lyapunov-Krasovskii stability approach for stability analysis of discrete time-delay *** this method,monotonically decreasing requirements of the Lyapunov-Krasovskii method are replaced with non-monotonic *** Lyapunov-Krasovskii functional is allowed to increase in some steps,but the overall trend should be *** model of practical systems used for stability analysis usually contain ***,firstly a non-monotonic stability condition is derived for certain discrete time-delay systems,then robust non-monotonic stability conditions are proposed for uncertain ***,a novel stabilization algorithm is derived based on the introduced non-monotonic stability *** Lyapunov-Krasovskii functional and the controller are obtained by solving a set of linear matrix inequalities(LMI)or iterative LMI based nonlinear *** proposed theorems are first evaluated by some numerical examples,and then by simulation and implementation on the pH neutralizing process plant.

关键词： Lyapunov-Krasovskii functional discrete state-delay systems non-monotonic Lyapunov function robust stability stabilization

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Analysis and assessment of nickel and chromium pollution in soils around Baghejar Chromite Mine of Sabzevar Ophiolite Belt,Northeastern Iran

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Transactions of Nonferrous Metals Society of China 2015年第7期25卷 2380-2387页

作者： Eisa solgi Javad PARMAH Department of Environment Faculty of Natural Resources and EnvironmentMalayer University

The key objective of this research was to estimate the Ni and Cr contents of soil around the Baghjar Chromite Mine（BCM）of Sabzevar Ophiolite Belt,Northeastern Iran,and assess the degree of soil pollution using the pollution *** samples（0-20 cm depth） were collected at various distances from the *** the present research,heavy metals（Cr and Ni） in soil samples were analyzed by atomic absorption spectrometry to detect their concentrations and contour maps were produced to explain the metal spatial ***,the degree of metal pollution was *** results indicate that the soils in the studied area are contaminated by Cr and *** corresponding concentrations for Cr and Ni are（156.19±24.45） and（321.7±133.27） mg/kg,respectively,which exceed the corresponding maximum allowable concentrations in *** different indices demonstrate that soils around chromite mine are significantly contaminated with Cr and Ni,suggesting several times higher levels of toxic metals than normal *** above results revealed that the heavy metal concentrations increase with increasing the distance from the mine and mining pollutants can be transported to long distances from their sources.

关键词： ophiolite belt chromite mine spatial pattern geoaccumulation index pollution load index

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KCl Single Crystals Growth with Mn, Ag and In Impurities by Czochralski Method and Study of Impurities Influence on Their Properties

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Open Journal of Physical Chemistry 2012年第3期2卷 185-188页

作者： Feridoun Samavat Ebrahim Haji Ali Somayeh solgi P. Taravati ahmad Physics Department Bu-Ali Sina University Hamedan Iran Physics Department Imam Hossein University Tehran Iran

In this research KCl, KCl:Mn, KCl:Ag and KCl:In single crystals have been grown by Czochralski method. X-ray diffraction confirms KCl single crystal formation. In this work also influence of mentioned impurities on the optical property of KCl single crystal has been studied by chemical etching. Then the hardness of these crystals have been measured by Vickers micro hardness. The result indicate the positive effect of the impurity on optical and mechanical properties.

关键词： Single Crystal KCl Czochralski X-Ray Diffraction Chemical Etching Vickers Micro Hardnes

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Evaluation of interleukin 8 +2767 A/T polymorphism in visceral leishmaniasis

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Asian Pacific Journal of Tropical Medicine 2016年第11期9卷 1053-1055页

作者： Alireza ahmadi Mehrdad Hajilooi Ghasem solgi Mohammad Abasi Ahad Bazmani Alireza Khalilian Mohammad Matini Khosro Sardarian Department of Internal Medicine School of MedicineHamadan University of Medical Sciences Department of Immunology Faculty of Medicine Hamadan University of Medical Sciences

Objective:To evaluated the relationship between the genetic variations at IL-8 +2767 position with VL pathogenesis among Iranian ***:Three groups including patients with VL clinical presentation and leishmania seropositive(n=124).patients seropositive but without clinical presentation(n=82) and healthy controls(n=63) were selected to conduct this cross-sectional *** at +2767 position of IL-8 was investigated using PCR-RPLP ***-leishmania antibody titration was evaluated by the immunoflorescence ***:We observed higher significant frequencies +2767 A/A and A/T genotypes in groups I compared to group 2 and healthy controls(P=0.001).Also,patients in Group 1 carriyng A/A genotype showed higher liter of antileshmania antibody than patients with A/T and T/T genotypes(P=0.05).The validity of the data was analyzed using Hardy-Weinberg equilibrium and one way analysis of variance(ANOVA),as well as x^***:Our findings indicate that the IL-8 +2767 polymorphism is significantly involved in impaired immune responses against VL and it could be considered as a risk factor for the VL progress.

关键词： Interleukin 8 Polymorphism Visceral leishmaniasis

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Promising Effects of Zerumbone on the Regulation of Tumor-promoting Cytokines Induced by TNF-α-activated Fibroblasts

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Current Medical Science 2020年第6期40卷 1075-1084页

作者： Zahra Radaei Alireza Zamani Rezvan Najafi Massoud Saidijam Farid Azizi Jalilian Razieh Ezati Ghasem solgi Razieh Amini Department of Immunology School of MedicineRamadan University of Medical SciencesHamadan 65178Iran Research Center for Molecular Medicine Hamadan University of Medical SciencesHamadan 65178Iran Department of Microbiology School of MedicineHamadan University of Medical SciencesHamadan 65178Iran Institute of Medical Biotechnology National Institute of Genetic Engineering and BiotechnologyTehran 14965Iran

Inflammation plays an important role in the development of several *** cytokines,including tumor necrosis factor-α(TNF-α),are associated with the induction of *** inflammation contributes to the progression of cancer through several mechanisms,including increased cytokine production and activation of transcription factors,such as nuclear factor-κB(NF-κB).Zerumbone(ZER),a component of subtropical ginger(Zingiber zerumbet Smith),seems to have anti-inflammatory,anti-cancer,and antioxidant *** this study,we aimed to explore the protective function and mechanisms of ZER against TNF-α-induced cancer-promoting *** found that the viability of stimulated human fibroblast cell lines was reduced after treatment with ZER(IC50=18µmol/L),compared to un-stimulated fibroblasts(IC50=40µmol/L).Besides,ZER inhibited mRNA expression and protein secretion of transforming growth factor-β(TGF-β),interleukin-33(IL-33),monocyte chemoattractant protein-1(MCP-1),and stromal cell-derived factor 1(SDF-1),which were produced by TNF-α-induced fibroblasts,as measured by quantitative real time-PCR(qRT-PCR)and ELISA *** mRNA expression levels of TGF-β,IL-33,SDF-1,and MCP-1 showed 8,5,2.5,and 4-fold reductions,***,secretion of TGF-β,IL-33,SDF-1,and MCP-1 was reduced to 3.65±0.34 ng/mL,6.3±0.26,1703.6±295.2,and 5.02±0.18 pg/mL,respectively,compared to the untreated *** addition,the conditioned media(CM)of TNF-α-stimulated fibroblasts increased the NF-κB expression in colorectal cancer cell lines(HCT-116 and Sw48),while in the vicinity of ZER,the expression of NF-κB was *** the significant effects of ZER,this component can be used as an appropriate alternative herbal treatment for cancer-related chronic inflammation.

关键词： inflammation zerumbone activated fibroblasts tumor necrosis factor-α(TNF-α) nuclear factor-κB(NF-κB)

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Landslide Zoning in Amir-Almoemenin (AS) Water Supply Pipeline Complex, North Khorasan

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Open Journal of Geology 2016年第1期6卷 1-10页

作者： Bizhan Shirdel Ali Sorbi Ali solgi Department of Geology Karaj Branch Islamic Azad University Karaj Iran Department of Geology Science and Research Branch Islamic Azad University Tehran Iran

Landslide term is used for all mass movements on slopes, including falling, overturns and flow debris. Using the potential landslide hazard zonation, areas with high potential of landslide hazard can be detected and so prevent the landslide occurrence with providing appropriate solutions. In this study, the landslide hazard zonation along the water transmission lines of the Amir-Almomenin (AS) water supply complex has been done. Studied area is located at the western part of the Northern Khorasan (Bojnord). Study procedure includes the general geology survey, recognition of the most important effective parameters on the landslide phenomena (such as slope, lithology, faults and streams) and has been evaluated as basic maps. Then, each layer was validated based on the importance of the effective factors using the maps weighting method in ArcGis software. Finally, the studied area was zoned based on the landslide potential using the overlapping of the various layers. Final zonation map shows that the North, Northwestern and Median parts of the studied area have the highest landslide potential. These areas are included of Marl and red Marl and to some extend loss deposits with slopes between 14 to more of 50 degrees. Seemingly, faults (due to low occurrence) and streams (due to drought) have lower effect on the landslide potential. However, the degree of the slope and type of lithology are the most important parameters on the landslide potential, respectively.

关键词： Landslide Zoning Amiralmoemenin Water Supply Pipeline Mass Movements Northern Khorasan

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