A Comparative Analysis of Some Aspects of Educating Young Children in Tanzania and in North America: Tanzanian Parents’ Perspectives∗

1999 ◽  
Vol 156 (1) ◽  
pp. 15-33
Author(s):  
Selina L.P. Mushi
2011 ◽  
Vol 63 (3) ◽  
pp. 831-836
Author(s):  
Dragica Vilotic ◽  
Mirjana Sijacic-Nikolic ◽  
Danijela Miljkovic ◽  
Mirjana Ocokoljic ◽  
M. Rebic

This paper shows the results obtained from the study of the macroscopic-microscopic structure (capillary system) in the growth stem of Gymnocladus canadensis Lam. originating from North America, which grows in ?Muzljanski rit? in the area of Srpska Crnja. Gymnocladus canadensis Lam. falls under the ring-porous species according to its porosity, with large tracheas in its early zone. The early zone trachea lumens, contained in the sapwood, reach dimensions of up to 160 ?m, while early zone trachea lumens in the growth stem rings of the sapwood reach dimensions of up to 120 ?m. Examination of the microscopic structure of this tree show good properties of the tree.


Author(s):  
Rachel Margolis ◽  
Bruno Arpino

Intergenerational relationships between grandparents and grandchildren can offer tremendous benefits to family members of each generation. The demography of grandparenthood – the timing, length and population characteristics – shape the extent to which young children have grandparents available, how many grandparents are alive, and the duration of overlap with grandparents. In this chapter, we examine how the demography of grandparenthood varies across 16 countries in Europe and two countries in North America, and why it is changing. Next, we examine variation in two key determinants of intergenerational relationships – the labour force participation and health of grandparents. Last, we comment on some important changes in the demography of grandparenthood that may come in the future.


2019 ◽  
Vol 21 (Supplement_6) ◽  
pp. vi183-vi184
Author(s):  
Jonathan Finlay ◽  
Martin Mynarek ◽  
Girish Dhall ◽  
Lucie Lafay-Cousin ◽  
Claire Mazewski ◽  
...  

Abstract BACKGROUND/OBJECTIVE Survival had been poor in several multi-center/national studies since the 1980s attempting to delay, avoid or minimize brain irradiation in young children with medulloblastoma. The introduction of regimens in Germany incorporating both intravenous high-dose (HD-MTX) and intraventricular (IVENT-MTX) methotrexate, as well as regimens in North America incorporating marrow-ablative chemotherapy with autologous hematopoietic cell rescue (HDCx+AuHCR), have reported encouraging outcomes. The objective of this report is to perform a comparative outcomes analysis of these differing strategies. METHODS Data from 17 prospective multi-center trials published between 1990 and 2018 for children under six years old with medulloblastoma were reviewed; event-free (EFS) and overall survivals (OS) were compared. RESULTS Two trials using full-dose cranio-spinal irradiation with or without chemotherapy reported 5-year survivals of 32–38%. Three trials using standard chemotherapy with delayed irradiation reported 2-4-year EFS and OS of 23–34% and 31–46%. Two trials employing standard chemotherapy without irradiation reported 3-5-year EFS and OS of 22–33% and 34–43%. Four trials incorporating HD-MTX with or without IVENT-MTX reported 5-10-year EFS and OS of 56–59% and 67–80%, and 31% and 59% respectively; one trial with HD-MTX without IVENT-MTX for localized desmoplastic/nodular medulloblastoma (DN-MB) reported 2-year EFS and OS of 52% and 92%. Finally, five trials employing induction chemotherapy, with or without HD-MTX, followed by single or tandem HDCx+AuHCR have reported 3-5-year EFS and OS of 45–60% and 60–70%. CONCLUSIONS The best survivals are observed in trials including HD-MTX and IVENT-MTX or including HD-MTX during induction followed by HDCx+AuHCR. Because histology/biology (classic and large cell/anaplastic versus DN-MB; SHH versus non-SHH subtypes) have crucial prognostic roles, EFS and irradiation-free survival advantages require analysis in these settings. The benefit of these trials appears true for all young children with medulloblastoma. Risk-adapted treatment stratification for young children may be improved by molecular profiling of SHH- and non-SHH medulloblastoma.


2010 ◽  
Vol 74 (5) ◽  
pp. 1059-1069 ◽  
Author(s):  
John R. Sauer ◽  
William A. Link ◽  
William L. Kendall ◽  
David D. Dolton

Museum Worlds ◽  
2016 ◽  
Vol 4 (1) ◽  
pp. 4-17 ◽  
Author(s):  
Julia A. King

ABSTRACTLegacy collections are an increasingly valued source of information for researchers interested in the study and interpretation of colonialism in the Chesapeake Bay region of North America. Through the reexamination of 34 archaeological collections ranging in date from 1500 through 1720, researchers, including the author, have been able to document interactions among Europeans, Africans, and indigenous people in this part of the early modern Atlantic. We could do this only because we turned to existing collections; no single site could reveal this complex story. This article summarizes the major findings from this work and describes the pleasures and challenges of comparative analysis using existing collections. Collections-based research can also be used to inform fieldwork, so the legacy collections of tomorrow are in as good shape as possible. Indeed, collections-based work reveals the need for a critical dialogue concerning the methods, methodology, and ethics of both collections and field-based research.


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