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Farrukh, Sanniya,Syed, Serajuddaula,Pervez, Shahid Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.13
Background: Gradual loss of cytokeratin 13 (CK13) may be linked with the severity of dysplastic changes and transformation to malignancy. In this study we assessed the differential expression of CK13 in normal, hyperplastic, dysplastic and cancerous oral mucosa. Materials and Methods: A total of 93 oral biopsies were collected during the 2011-2014 period. The biopsies were characterized as normal (19), hyperplastic (21), severely dysplastic/carcinoma in situ (16) and invasive oral squamous cell carcinoma (OSCC) (37) after morphological assessment. Formalin fixed paraffin embedded sections were stained with a monoclonal antibody against CK13 using the Envision technique. Immunohistochemically stained slides were then analyzed for CK13 expression. Results: CK13 was consistently and diffusely expressed in all normal and hyperplastic tissue biopsies from oral mucosa. Severely dysplastic/carcinoma in situ biopsies showed complete loss in 50% of cases, while in the remaining 50% expression was very focal and weak. OSCC cases showed complete or near complete loss of CK13 in all cases. Few cases showed weak expression in keratin pearls only. Conclusions: This study validates the utility of CK13 IHC as a useful immunohistochemical marker in routine diagnostic practice to make distinction between non-neoplastic from dysplastic and neoplastic (malignant) oral lesions.
ON A MULTI-PARAMETRIC GENERALIZATION OF THE UNIFORM ZERO-TWO LAW IN L1-SPACES
Farrukh Mukhamedov 대한수학회 2015 대한수학회보 Vol.52 No.6
Following an idea of Ornstein and Sucheston, Foguel proved the so-called uniform “zero-two” law: let T : L1(X,F,μ) → L1(X,F,μ) be a positive contraction. If for some m ∈ N∪{0} one has ∥Tm+1−Tm∥ < 2, then lim n→∞ ∥Tn+1 − Tn∥ = 0. There are many papers devoted to generalizations of this law. In the present paper we provide a multi-parametric generalization of the uniform zero-two law for L1-contractions.
Multi-Objective Optimization for a Reliable Localization Scheme in Wireless Sensor Networks
Farrukh Shahzad,Tarek R. Sheltami,Elhadi M. Shakshuki 한국통신학회 2016 Journal of communications and networks Vol.18 No.5
In many wireless sensor network (WSN) applications,the information transmitted by an individual entity or node is oflimited use without the knowledge of its location. Research in nodelocalization ismostly geared towardsmulti-hop range-free localiza-tion algorithms to achieve accuracy by minimizing localization er-rors between the node‘s actual and estimated position. The existinglocalization algorithms are focused on improving localization accu-racy without considering efficiency in terms of energy costs and al-gorithmconvergence time. In this work, we show that our proposedlocalization scheme, called DV-maxHop, can achieve good accuracyand efficiency.We formulate the multi-objective optimization func-tions to minimize localization errors as well as the number of trans-mission during localization phase. We evaluate the performance ofour scheme using extensive simulation on several anisotropic andisotropic topologies. Our scheme can achieve dual objective of ac-curacy and efficiency for various scenarios. Furthermore, the re-cently proposed algorithms require random uniform distributionof anchors. We also utilized our proposed scheme to compare andstudy some practical anchor distribution schemes.
Seed Germination Ecology of Giant Ragweed (Ambrosia trifida) in Korea
Farrukh Ruziev,In Kon Park,Mirjalol Umurzokov,Botir Khaitov,Aung Bo Bo,Wei Qiang Jia,Le Thi Hien,Jung Sup Choi,Kee Woong Park 한국잡초학회·한국잔디학회 2020 Weed & Turfgrass Science Vol.9 No.1
The effect of environmental factors on the growth of giant ragweed (ambrosia trifida) was determined in this study. Seed germination and seedling emergence were evaluated under different photoperiods, constant temperature, and periods after harvesting and burial depths. Dry storage of freshly harvested seeds caused slow release of dormancy at 25℃. The maximum germination rate of >65% was observed 11 months after harvest. Different light periods showed no significant impact to seed germination. The lowest germination was observed under complete darkness, while the highest germination was under alternating dark/light conditions. Regarding the temperature, giant ragweed seeds were able to germinate well at low temperatures (5-15℃) compared to high temperatures (30-40℃). The optimum temperature for germination was between 15 and 25℃ (>85%). Seedling emergence was initially increased up to 2 cm depth of burial, after which emergence declined sharply with increasing the burial depth up to 10 cm. There was no emergence beyond 10 cm depth of soil. The results indicated that giant ragweed seeds could germinate in cold months of spring regardless the light period. However, seeds need to overcome dormancy and be established superior levels of soil to have higher chance of propagation.