A Mathematical Conversation With Fourth Graders

1991 ◽  
Vol 38 (8) ◽  
pp. 38-43
Author(s):  
E. Paul Goldenberg
Keyword(s):  
Curriculum Development ◽  
Fourth Graders ◽  
Development Project ◽  
Mathematical Ability ◽  
The Other ◽  
Blue Collar ◽  
Education Development ◽  
Development Center ◽  
Better Than

This article reports a mathematical conversation with some fourth graders. As part of an NSF-funded curriculum-development project conducted at Education Development Center, we wanted to see how students would think about decimals if their first encounter with them was as “more numbers between the familiar numbers.” Two groups of eight fourth graders were selected in a school serving a predominantly blue-collar semiurban community near Boston. One group was identified as “better than average but not the brightest,” whereas the other was decribed as having “real problems” and “little mathematical ability.” None of the sixteen students had apparently learned anything about decimals before.

Projects: The Connected Geometry Project

1996 ◽  
Vol 89 (7) ◽  
pp. 612-614
Author(s):  
Sharon Stenglein
Keyword(s):  
Secondary School ◽  
Curriculum Development ◽  
National Science Foundation ◽  
School Curriculum ◽  
Development Project ◽  
Education Development ◽  
National Science ◽  
Secondary School Curriculum ◽  
Development Center

Connected Geometry is a secondary school curriculum development project funded by the National Science Foundation and housed at Education Development Center in Newton, Massachusetts.

Mathematical Ability and Masculinity

1960 ◽  
Vol 7 (1) ◽  
pp. 19-21 ◽  
Author(s):  
Philip Lambert
Keyword(s):  
Mathematical Ability ◽  
The Other ◽  
Early Age ◽  
Test Results ◽  
Men And Women ◽  
General Acceptance ◽  
Other Hand ◽  
The Subject ◽  
Innate Ability ◽  
Better Than

The idea that men are Better than women at mathematics has been widespread. Many writers on education have taken it for granted; a few have tried to prove it. Unfortunately, the general acceptance of this assumption distorts the test results; achievement rather than innate ability is measured. A comparison of the scores of men and women on various kinds of arithmetic tests is not conclusive, since ability to do arithmetic is partly the result of past and present interest in the subject. Even at an early age, boys are expected to be interested in mathematics. Girls, on the other hand, though they may have equal ability, may be discouraged from learning by the prevailing idea that mathematics is a masculine field.

scholarly journals Workforce Skills Curriculum Development in Context: Case Studies in Rwanda, Algeria, and the Philippines

2021 ◽  
pp. 113-146
Author(s):  
Catherine Honeyman ◽  
Laura Cordisco Tsai ◽  
Nancy Chervin ◽  
Melanie Sany ◽  
Janice Ubaldo
Keyword(s):  
Curriculum Development ◽  
Case Studies ◽  
Workforce Development ◽  
Life Skills ◽  
Professional Community ◽  
The Philippines ◽  
Education Development ◽  
Workforce Skills ◽  
Development Center ◽  
Insight Into

AbstractLife skills programming in the field of international workforce development operates within a professional community of practice that is shaped by dynamics of power, influence, and resources, as well as by specific local contexts and actors. This chapter gives detailed insight into three case studies of youth workforce life skills programming developed by the organizations World Learning, Education Development Center, and 10ThousandWindows in different national settings and with distinct youth populations, highlighting how these organizations have interacted with the larger field and learned from one another to address issues of contextualization, pedagogy, sustainability, and scale. Through descriptions of programming in Rwanda, Algeria, and the Philippines, the chapter offers insight into the complexities of life skills curriculum development and contextualization processes and highlights issues that remain difficult to resolve, as well as new frontiers for programming in rapidly changing economies.

Closing the GAP—A 5Å Scanning Microscope

1969 ◽  
Vol 27 ◽  
pp. 6-7
Author(s):  
A. V. Crewe
Keyword(s):  
Normal Form ◽  
The Other ◽  
Resolving Power ◽  
Scanning Microscope ◽  
Conventional Microscope ◽  
Other Hand ◽  
Closing The Gap ◽  
Thermal Sources ◽  
Better Than ◽  
Transmission Microscope

We have become accustomed to differentiating between the scanning microscope and the conventional transmission microscope according to the resolving power which the two instruments offer. The conventional microscope is capable of a point resolution of a few angstroms and line resolutions of periodic objects of about 1Å. On the other hand, the scanning microscope, in its normal form, is not ordinarily capable of a point resolution better than 100Å. Upon examining reasons for the 100Å limitation, it becomes clear that this is based more on tradition than reason, and in particular, it is a condition imposed upon the microscope by adherence to thermal sources of electrons.

The Effect of Language Games with Audio Visual Aids on Students’ Speaking Competence at Fourth Graders of Tunas Daud Elementary School

2019 ◽  
Vol 3 (3) ◽  
pp. 185
Author(s):  
Susnawati. K ◽  
Marhaeni A.A.I.N ◽  
Ramendra D.P
Keyword(s):  
Elementary School ◽  
Fourth Graders ◽  
Fourth Grade ◽  
Control Group ◽  
Language Games ◽  
Visual Aids ◽  
Fourth Grade Students ◽  
Post Test ◽  
Competence Test ◽  
Better Than

Study aimed to determine the effect of language games with audio visual aids on students' speaking competence at fourth grade students of Tunas Daud elementary school and to describe the implementation of language games with audio visual aids on students’ speaking competence. The design used in this research was a mixed method design. It was explanatory design since this research was started with quantitative design (experimental design with post test only control design) followed by qualitative design. The samples were 62 students; 31 students of the experimental group and 31 students of the control group of fourth grade Tunas Daud elementary students. The data were collected by using speaking competence test and analyzed by IBM SPSS 22 with independent t-test. The data were also collected through an observation sheet for observing the implementation of the language games with audio visual aids. The results showed there was a significant effect of the language games with audio visual aids on students' speaking competence in which the mean score of the students who were taught by using language games with audio visual aids is better than the students who were taught without language games with audio visual aids. For the implementation of the language games with audio visual aids, it can be seen that the implementation of the language games with audio visual aids were done in a very good way. The games was suitable for the students since it could give good impacts for the students. The students are active and confident to speak.

MUNDANE MIRACLES IN AWADH. ENCOUNTERS WITH THE REVEALED AND THE HIDDEN

2020 ◽  
pp. 130-140
Author(s):  
Maxim B. Demchenko ◽  
Keyword(s):  
The Other ◽  
Local People ◽  
Natural Phenomena ◽  
Mughal Empire ◽  
The Public ◽  
British Raj ◽  
The Subject ◽  
Other World ◽  
Better Than

The sphere of the unknown, supernatural and miraculous is one of the most popular subjects for everyday discussions in Ayodhya – the last of the provinces of the Mughal Empire, which entered the British Raj in 1859, and in the distant past – the space of many legendary and mythological events. Mostly they concern encounters with inhabitants of the “other world” – spirits, ghosts, jinns as well as miraculous healings following magic rituals or meetings with the so-called saints of different religions (Hindu sadhus, Sufi dervishes),with incomprehensible and frightening natural phenomena. According to the author’s observations ideas of the unknown in Avadh are codified and structured in Avadh better than in other parts of India. Local people can clearly define if they witness a bhut or a jinn and whether the disease is caused by some witchcraft or other reasons. Perhaps that is due to the presence in the holy town of a persistent tradition of katha, the public presentation of plots from the Ramayana epic in both the narrative and poetic as well as performative forms. But are the events and phenomena in question a miracle for the Avadhvasis, residents of Ayodhya and its environs, or are they so commonplace that they do not surprise or fascinate? That exactly is the subject of the essay, written on the basis of materials collected by the author in Ayodhya during the period of 2010 – 2019. The author would like to express his appreciation to Mr. Alok Sharma (Faizabad) for his advice and cooperation.

Temperature Effects during Endodormancy Induction on Subsequent Anthesis and Growth of Peach Trees

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 452c-452 ◽  
Author(s):  
Schuyler D. Seeley ◽  
Raymundo Rojas-Martinez ◽  
James Frisby
Keyword(s):  
Temperature Effects ◽  
Shoot Length ◽  
The Other ◽  
Nighttime Temperatures ◽  
Peach Trees ◽  
Better Than

Mature peach trees in pots were treated with nighttime temperatures of –3, 6, 12, and 18 °C for 16 h and a daytime temperature of 20 °C for 8 h until the leaves abscised in the colder treatments. The trees were then chilled at 6 °C for 40 to 70 days. Trees were removed from chilling at 40, 50, 60, and 70 days and placed in a 20 °C greenhouse under increasing daylength, spring conditions. Anthesis was faster and shoot length increased with longer chilling treatments. Trees exposed to –3 °C pretreatment flowered and grew best with 40 days of chilling. However, they did not flower faster or grow better than the other treatments with longer chilling times. There was no difference in flowering or growth between the 6 and 12 °C pretreatments. The 18 °C pretreatment resulted in slower flowering and very little growth after 40 and 50 days of chilling, but growth was comparable to other treatments after 70 days of chilling.

Nglyc: A Random Forest Method for Prediction of N-Glycosylation Sites in Eukaryotic Protein Sequence

2020 ◽  
Vol 27 (3) ◽  
pp. 178-186 ◽  
Author(s):  
Ganesan Pugalenthi ◽  
Varadharaju Nithya ◽  
Kuo-Chen Chou ◽  
Govindaraju Archunan
Keyword(s):  
Random Forest ◽  
Protein Sequence ◽  
Glycosylation Site ◽  
Computational Method ◽  
The Other ◽  
Eukaryotic Protein ◽  
Random Forest Method ◽  
Glycosylation Sites ◽  
Human And Mouse ◽  
Better Than

Background: N-Glycosylation is one of the most important post-translational mechanisms in eukaryotes. N-glycosylation predominantly occurs in N-X-[S/T] sequon where X is any amino acid other than proline. However, not all N-X-[S/T] sequons in proteins are glycosylated. Therefore, accurate prediction of N-glycosylation sites is essential to understand Nglycosylation mechanism. Objective: In this article, our motivation is to develop a computational method to predict Nglycosylation sites in eukaryotic protein sequences. Methods: In this article, we report a random forest method, Nglyc, to predict N-glycosylation site from protein sequence, using 315 sequence features. The method was trained using a dataset of 600 N-glycosylation sites and 600 non-glycosylation sites and tested on the dataset containing 295 Nglycosylation sites and 253 non-glycosylation sites. Nglyc prediction was compared with NetNGlyc, EnsembleGly and GPP methods. Further, the performance of Nglyc was evaluated using human and mouse N-glycosylation sites. Results: Nglyc method achieved an overall training accuracy of 0.8033 with all 315 features. Performance comparison with NetNGlyc, EnsembleGly and GPP methods shows that Nglyc performs better than the other methods with high sensitivity and specificity rate. Conclusion: Our method achieved an overall accuracy of 0.8248 with 0.8305 sensitivity and 0.8182 specificity. Comparison study shows that our method performs better than the other methods. Applicability and success of our method was further evaluated using human and mouse N-glycosylation sites. Nglyc method is freely available at https://github.com/bioinformaticsML/ Ngly.

pLoc_bal-mEuk: Predict Subcellular Localization of Eukaryotic Proteins by General PseAAC and Quasi-balancing Training Dataset

2019 ◽  
Vol 15 (5) ◽  
pp. 472-485 ◽  
Author(s):  
Kuo-Chen Chou ◽  
Xiang Cheng ◽  
Xuan Xiao
Keyword(s):  
Drug Development ◽  
Subcellular Localization ◽  
Basic Research ◽  
The Other ◽  
Training Dataset ◽  
Sequence Information ◽  
Eukaryotic Proteins ◽  
Validation Tests ◽  
User Friendly ◽  
Better Than

<P>Background/Objective: Information of protein subcellular localization is crucially important for both basic research and drug development. With the explosive growth of protein sequences discovered in the post-genomic age, it is highly demanded to develop powerful bioinformatics tools for timely and effectively identifying their subcellular localization purely based on the sequence information alone. Recently, a predictor called “pLoc-mEuk” was developed for identifying the subcellular localization of eukaryotic proteins. Its performance is overwhelmingly better than that of the other predictors for the same purpose, particularly in dealing with multi-label systems where many proteins, called “multiplex proteins”, may simultaneously occur in two or more subcellular locations. Although it is indeed a very powerful predictor, more efforts are definitely needed to further improve it. This is because pLoc-mEuk was trained by an extremely skewed dataset where some subset was about 200 times the size of the other subsets. Accordingly, it cannot avoid the biased consequence caused by such an uneven training dataset. </P><P> Methods: To alleviate such bias, we have developed a new predictor called pLoc_bal-mEuk by quasi-balancing the training dataset. Cross-validation tests on exactly the same experimentconfirmed dataset have indicated that the proposed new predictor is remarkably superior to pLocmEuk, the existing state-of-the-art predictor in identifying the subcellular localization of eukaryotic proteins. It has not escaped our notice that the quasi-balancing treatment can also be used to deal with many other biological systems. </P><P> Results: To maximize the convenience for most experimental scientists, a user-friendly web-server for the new predictor has been established at http://www.jci-bioinfo.cn/pLoc_bal-mEuk/. </P><P> Conclusion: It is anticipated that the pLoc_bal-Euk predictor holds very high potential to become a useful high throughput tool in identifying the subcellular localization of eukaryotic proteins, particularly for finding multi-target drugs that is currently a very hot trend trend in drug development.</P>

scholarly journals Chance or Necessity—The Fungi Co−Occurring with Formica polyctena Ants

Insects ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 204
Author(s):  
Igor Siedlecki ◽  
Michał Gorczak ◽  
Alicja Okrasińska ◽  
Marta Wrzosek
Keyword(s):  
Molecular Identification ◽  
High Frequency ◽  
Its Rdna ◽  
The Other ◽  
Formica Polyctena ◽  
Ant Nests ◽  
Mutualistic Fungi ◽  
The Tropics ◽  
High Diversity ◽  
Better Than

Studies on carton nesting ants and domatia−dwelling ants have shown that ant–fungi interactions may be much more common and widespread than previously thought. Until now, studies focused predominantly on parasitic and mutualistic fungi–ant interactions occurring mostly in the tropics, neglecting less−obvious interactions involving the fungi common in ants’ surroundings in temperate climates. In our study, we characterized the mycobiota of the surroundings of Formica polyctena ants by identifying nearly 600 fungal colonies that were isolated externally from the bodies of F. polyctena workers. The ants were collected from mounds found in northern and central Poland. Isolated fungi were assigned to 20 genera via molecular identification (ITS rDNA barcoding). Among these, Penicillium strains were the most frequent, belonging to eight different taxonomic sections. Other common and widespread members of Eurotiales, such as Aspergillus spp., were isolated very rarely. In our study, we managed to characterize the genera of fungi commonly present on F. polyctena workers. Our results suggest that Penicillium, Trichoderma, Mucor, Schwanniomyces and Entomortierella are commonly present in F. polyctena surroundings. Additionally, the high diversity and high frequency of Penicillium colonies isolated from ants in this study suggest that representatives of this genus may be adapted to survive in ant nests environment better than the other fungal groups, or that they are preferentially sustained by the insects in nests.

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