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A nuanced view of highly skilled migrants
Sheila Siar 전남대학교 글로벌디아스포라연구소 2014 전남대학교 세계한상문화연구단 국제학술회의 Vol.2014 No.11
The Philippines’s history of skilled migration shows the Filipino diaspora as active participants in the processes of globalisation and migration. Their mobility is facilitated by colonial ties, the shortage of local skilled workers, the adoption of neoliberal policies by many destination countries, and the pro-active migration facilitation of the Philippine government. The experience of the highly skilled Filipino diaspora in Australia and New Zealand reveals that they are not insulated from settlement issues just because they are better skilled or better educated. Similar to the lower skilled, they are beset with settlement issue but of a different nature. They experienced deskilling or downward professional mobility and had to train or study for a degree in the host country to improve their employment outcomes. As to their diasporic connection with the home country, the study finds their deep cultural and sentimental links with the Philippines which are manifested in their information-seeking behavior, sending of financial remittance, taking of dual citizenship, participation in Philippine events, and the country they perceive as ‘home’. Their deep attachment is also reflected by their knowledge transfers to the Philippines. Their motivation to help the home country emerged as a strong driver to share their expertise or facilitate the exchange of resources between the home and host countries. These knowledge transfers support the view that skilled migration may necessarily lead to the loss of knowledge and skills for the sending countries because it can also contribution to the intellectual, social, and economic capital of migrants for which sending countries gain through knowledge transfer. The embedded connectedness of migrants with their home country make many forms of beneficial diasporic connections possible (e. g., financial remittances, investment flows, knowledge and skills transfers, technology transfers). It is a window of opportunity that home countries should exploit to capture the positive gains of skilled migration.
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SOME NEW IDENTITIES CONCERNING THE HORADAM SEQUENCE AND ITS COMPANION SEQUENCE
Keskin, Refik,Siar, Zafer Korean Mathematical Society 2019 대한수학회논문집 Vol.34 No.1
Let a, b, P, and Q be real numbers with $PQ{\neq}0$ and $(a,b){\neq}(0,0)$. The Horadam sequence $\{W_n\}$ is defined by $W_0=a$, $W_1=b$ and $W_n=PW_{n-1}+QW_{n-2}$ for $n{\geq}2$. Let the sequence $\{X_n\}$ be defined by $X_n=W_{n+1}+QW_{n-1}$. In this study, we obtain some new identities between the Horadam sequence $\{W_n\}$ and the sequence $\{X_n\}$. By the help of these identities, we show that Diophantine equations such as $$x^2-Pxy-y^2={\pm}(b^2-Pab-a^2)(P^2+4),\\x^2-Pxy+y^2=-(b^2-Pab+a^2)(P^2-4),\\x^2-(P^2+4)y^2={\pm}4(b^2-Pab-a^2),$$ and $$x^2-(P^2-4)y^2=4(b^2-Pab+a^2)$$ have infinitely many integer solutions x and y, where a, b, and P are integers. Lastly, we make an application of the sequences $\{W_n\}$ and $\{X_n\}$ to trigonometric functions and get some new angle addition formulas such as $${\sin}\;r{\theta}\;{\sin}(m+n+r){\theta}={\sin}(m+r){\theta}\;{\sin}(n+r){\theta}-{\sin}\;m{\theta}\;{\sin}\;n{\theta},\\{\cos}\;r{\theta}\;{\cos}(m+n+r){\theta}={\cos}(m+r){\theta}\;{\cos}(n+r){\theta}-{\sin}\;m{\theta}\;{\sin}\;n{\theta},$$ and $${\cos}\;r{\theta}\;{\sin}(m+n){\theta}={\cos}(n+r){\theta}\;{\sin}\;m{\theta}+{\cos}(m-r){\theta}\;{\sin}\;n{\theta}$$.
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Alblazi, Kamila Mohamed Om,Siar, Chong Huat Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.6
Background: Protrusive structures formed by migrating and invading cells are termed lamellipodia, filopodia, invadopodia and podosomes. Lamellipodia and filopodia appear on the leading edges of migrating cells and function to command the direction of the migrating cells. Invadopodia and podosomes are special F-actin-rich matrix-degrading structures that arise on the ventral surface of the cell membrane. Invadopodia are found in a variety of carcinomatous cells including squamous cell carcinoma of head and neck region whereas podosomes are found in normal highly motile cells of mesenchymal and myelomonocytic lineage. Invadopodia-associated protein markers consisted of 129 proteins belonging to different functional classes including WASP, NWASP, cortactin, Src kinase, Arp 2/3 complex, MT1-MMP and F-actin. To date, our current understanding on the role(s) of these regulators of actin dynamics in tumors of the orofacial region indicates that upregulation of these proteins promotes invasion and metastasis in oral squamous cell carcinoma, is associated with poor/worst prognostic outcome in laryngeal cancers, contributes to the persistent growth and metastasis characteristics of salivary gland adenoid cystic carcinoma, is a significant predictor of increased cancer risk in oral mucosal premalignant lesions and enhances local invasiveness in jawbone ameloblastomas.
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