title: A hybrid genetic algorithm for a loading problem in flexible manufacturing systems

authors: Basnet, Chuda

subjects: flexible manufacturing systems

abstract: One of the operating decisions involved in the scheduling of flexible manufacturing systems (FMS) is that of loading the FMS. Given a pool of jobs, which can be processed on alternate machines and alternate tools, the scheduler has to decide on the allocation of tools and machines to the different jobs. Various versions of this problem have appeared in the literature. We consider the version where jobs are selected for processing in a FMS in a planning horizon, operations for these jobs are assigned to machines, and corresponding tools are allocated to the slots in the machines. The objective is to minimise system unbalance. A hybrid genetic algorithm is presented that addresses this problem. Computational comparison between the genetic algorithm and previous algorithms is presented.

text: A hybrid genetic algorithm for a loading problem in flexible manufacturing systems One of the operating decisions involved in the scheduling of flexible manufacturing systems (FMS) is that of loading the FMS. Given a pool of jobs, which can be processed on alternate machines and alternate tools, the scheduler has to decide on the allocation of tools and machines to the different jobs. Various versions of this problem have appeared in the literature. We consider the version where jobs are selected for processing in a FMS in a planning horizon, operations for these jobs are assigned to machines, and corresponding tools are allocated to the slots in the machines. The objective is to minimise system unbalance. A hybrid genetic algorithm is presented that addresses this problem. Computational comparison between the genetic algorithm and previous algorithms is presented.

year: 2011

title: Examining the effects of policy design on affordable unit production under inclusionary zoning policies

authors: Wang, Ruoniu

abstract: Problem, research strategy, and findings: Evidence suggests that inclusionary zoning (IZ) correlates with affordable housing and mixed-income communities; however, what effect the policy design has on affordable housing productivity remains unclear. In this study we investigated the relationship between policy features and average annual affordable unit production under IZ by using the IZ data set, which includes adoption year, standardized characteristics, and outcomes in terms of affordable unit counts for 27 U.S. states and the District of Columbia. Although the data set does not fully capture affordable unit production for all IZ policies or those produced from in-lieu payments, this study is by far the largest scale empirical examination of IZ outcomes. Findings indicated that jurisdictions with policies that were mandatory, older, covered the entire jurisdiction, or had more complex income requirements designed to reach lower income levels had significantly higher production of affordable units. The top 15% of high-producing policies disproportionately consisted of policies that created affordable rental units, covered the entire jurisdiction, and had more complex income requirements. In addition, longer affordability terms were not associated with lower affordable unit productivity in our regression models.
Takeaway for practice: Our analysis identified common traits in IZ policies that produced at least one affordable unit as well as high-producing policies. These commonalities generally support enacting more stringent IZ policies with some flexibility in terms of the income levels served for greater affordable unit productivity. Limitations revealed in the data set suggested that local jurisdictions should better track affordable units to gain more information about what works. Considering that IZ policy design varies greatly, planners and policymakers must consider local housing market conditions relative to findings in this study as well as state and local regulatory environments when designing IZ policies.

text: Examining the effects of policy design on affordable unit production under inclusionary zoning policies Problem, research strategy, and findings: Evidence suggests that inclusionary zoning (IZ) correlates with affordable housing and mixed-income communities; however, what effect the policy design has on affordable housing productivity remains unclear. In this study we investigated the relationship between policy features and average annual affordable unit production under IZ by using the IZ data set, which includes adoption year, standardized characteristics, and outcomes in terms of affordable unit counts for 27 U.S. states and the District of Columbia. Although the data set does not fully capture affordable unit production for all IZ policies or those produced from in-lieu payments, this study is by far the largest scale empirical examination of IZ outcomes. Findings indicated that jurisdictions with policies that were mandatory, older, covered the entire jurisdiction, or had more complex income requirements designed to reach lower income levels had significantly higher production of affordable units. The top 15% of high-producing policies disproportionately consisted of policies that created affordable rental units, covered the entire jurisdiction, and had more complex income requirements. In addition, longer affordability terms were not associated with lower affordable unit productivity in our regression models.
Takeaway for practice: Our analysis identified common traits in IZ policies that produced at least one affordable unit as well as high-producing policies. These commonalities generally support enacting more stringent IZ policies with some flexibility in terms of the income levels served for greater affordable unit productivity. Limitations revealed in the data set suggested that local jurisdictions should better track affordable units to gain more information about what works. Considering that IZ policy design varies greatly, planners and policymakers must consider local housing market conditions relative to findings in this study as well as state and local regulatory environments when designing IZ policies.

year: 2022

title: Tūturu whakamaua ko te kupu, haumi e, hui e, ko ngā kupu o te mātauranga ē!

authors: Dale, Hēmi

subjects: Reo Māori

abstract: Ko tā tēnei tuhinga he arotahi ki ētahi o ngā take reo e pā ana ki ngā mahi whakangungu pouako mā te huarahi o te reo Māori i roto i te whare wānanga. Ka mutu, ka kōrerorerotia ngā urupare a te Huarahi Māori (tētahi kaiwhakarato whakangungu pouako mā te huarahi o te reo Māori) ki ētahi o ēnei take reo.

text: Tūturu whakamaua ko te kupu, haumi e, hui e, ko ngā kupu o te mātauranga ē! Ko tā tēnei tuhinga he arotahi ki ētahi o ngā take reo e pā ana ki ngā mahi whakangungu pouako mā te huarahi o te reo Māori i roto i te whare wānanga. Ka mutu, ka kōrerorerotia ngā urupare a te Huarahi Māori (tētahi kaiwhakarato whakangungu pouako mā te huarahi o te reo Māori) ki ētahi o ēnei take reo.

year: 2017