More Like this

1. Incorporating PDP Themes the Akamai Way

   https://doi.org/10.58021/S56P4T  

   Perez, Kauahi; Barnes, Austin; Mousavi, Ali; Kassab, Richard (January 2022, Institute for Scientist & Engineer Educators (ISEE))

   Seagroves, Scott; Barnes, Austin; Metevier, Anne; Porter, Jason; Hunter, Lisa (Ed.)

   As part of the Institute for Scientist and Engineer Educators Professional Development Program (PDP), our team designed an activity for the Akamai internship program’s Preparation for Research Experiences and Projects (PREP) course. The activity focused on content around different renewable energy and storage technologies, and the widely applicable engineering practice of optimization through iteration and evaluating trade-offs. Here we describe the overall activity, with primary emphasis on how the PDP backward design process and integration of the Equity & Inclusion (E&I) theme led us to design and implement a unique model we call the “expert training model” that has important E&I implications. We found that an educational activity design that focuses on E&I considerations, such as identifying multiple ways to productively participate and developing learners’ identity in STEM, simultaneously satisfies criteria for being an engaging and authentic STEM experience. We also reflect on potential pitfalls and ways to improve and adapt this model. 

   more » « less
2. Culturally Relevant and Responsive Education: A Re-Examination of the ISEE Equity & Inclusion Theme

   https://doi.org/10.58021/S5TG63  

   O’Donnell, Christine (January 2022, Institute for Scientist & Engineer Educators (ISEE))

   Seagroves, Scott; Barnes, Austin; Metevier, Anne; Porter, Jason; Hunter, Lisa (Ed.)

   The lack of diversity in science, technology, engineering, and mathematics (STEM) is a complex problem, and one dimension is the experiences that students from marginalized groups often have in classroom environments. Students cite their struggles to negotiate between their own cultures and STEM’s cultures as a reason for why they do not feel a sense of belonging and identity as a person in STEM. To address these challenges, educators and researchers have proposed various frameworks to transform education. In this article, I re-examine the ISEE Equity & Inclusion (E&I) Theme in comparison to culturally relevant pedagogy and culturally responsive teaching models. While these frameworks have many common elements, including their emphasis on students’ achievements, building on students’ cultural assets, and providing scaffolding for content and practices, they differ in their focus on cultural pride and identities of critical consciousness. Drawing on these differences, I suggest directions for instructors who are familiar with the ISEE E&I Theme on how to make their approach to equity and inclusion more robust. 

   more » « less
3. Rainfall partitioning varies across a forest age chronosequence in the southern A ppalachian M ountains

   https://doi.org/10.1002/eco.2081  

   Brantley, Steven_T; Miniat, Chelcy_F; Bolstad, Paul_V (February 2019, Ecohydrology)

   Abstract Evaporation of precipitation from plant surfaces, or interception, is a major component of the global water budget. Interception has been measured and/or modelled across a wide variety of forest types; however, most studies have focused on mature, second‐growth forests, and few studies have examined interception processes across forest age classes. We present data on two components of interception, total canopy interception (E_i) and litter interception—that is, O_i + O_ehorizon layers—(E_ff), across a forest age chronosequence, from 2 years since harvest to old growth. We used precipitation, throughfall, and stemflow collectors to measure total rainfall (P) and estimateE_i; and collected litter biomass and modelled litter wetting and drying to estimate evaporative loss from litter. CanopyE_i,Pminus throughfall, increased rapidly with forest age and then levelled off to a maximum of 21% ofPin an old‐growth site. Stemflow also varied across stands, with the highest stemflow (~8% ofP) observed in a 12‐year‐old stand with high stem density. ModelledE_ffwas 4–6% ofPand did not vary across sites. Total stand‐level interception losses (E_i + E_ff) were best predicted by stand age (R² = 0.77) rather than structural parameters such as basal area (R² = 0.49) or leaf area (R² < 0.01). Forest age appears to be an important driver of interception losses from forested mountain watersheds even when stand‐level structural variables are similar. These results will contribute to our understanding of water budgets across the broader matrix of forest ages that characterize the modern forest landscape. 

   more » « less
4. L oo p D e l t a : E m b e dd i n g L o c a li t y - a w a r e O pp o r t un i s t i c D e l t a C o m p r e ss i o n i n I n li n e D e dup li c a t i o n f o r Hi g h l y E ffic i e n t D a t a R e du c t i o n

   Zhang, Yucheng; Jiang, Hong; Feng, Dan; Jiang Nan; Qui, Taorong; Huang, Wei (July 2023, USENIX annual technical conference)

   A s a c om pl e men t t o da ta d edupli cat ion , de lta c om p ress i on fu r- t he r r edu c es t h e dat a vo l u m e by c o m pr e ssi n g n o n - dup li c a t e d ata chunk s r e l a t iv e to t h e i r s i m il a r chunk s (bas e chunk s). H ow ever, ex is t i n g p o s t - d e dup li c a t i o n d e l t a c o m pr e ssi o n a p- p ro a ches fo r bac kup s t or ag e e i t h e r su ffe r f ro m t h e l ow s i m - il a r i t y b e twee n m any de te c ted c hun ks o r m i ss so me po t e n - t i a l s i m il a r c hunks , o r su ffer f r om l ow (ba ckup and r es t ore ) th r oug hpu t du e t o extr a I/ Os f or r e a d i n g b a se c hun ks o r a dd a dd i t i on a l s e r v i c e - d i s r up t ive op e r a t i on s to b a ck up s ys t em s. I n t h i s pa p e r, w e pr opo se L oop D e l t a t o a dd ress the above - m e n t i on e d prob l e m s by an e nha nced em b e ddi n g d e l t a c o m p - r e ss i on sc heme i n d e dup li c a t i on i n a non - i n t ru s ive way. T h e e nha nce d d elt a c o mpr ess ion s che m e co m b in e s f our key t e c h - ni qu e s : (1) du a l - l o c a li t y - b a s e d s i m il a r i t y t r a c k i n g to d e t ect po t e n t i a l si m il a r chun k s b y e x p l o i t i n g both l o g i c a l and ph y - s i c a l l o c a li t y, ( 2 ) l o c a li t y - a wa r e pr e f e t c h i n g to pr efe tc h ba se c hun ks to a vo i d ex t ra I/ Os fo r r e a d i n g ba s e chun ks on t h e w r i t e p at h , (3) c a che -aware fil t e r to avo i d ext r a I/Os f or b a se c hunk s on t he read p at h, a nd (4) i nver sed de l ta co mpressi on t o perf orm de lt a co mpress i o n fo r d at a chunk s t hat a re o th e r wi se f o r b i dd e n to s er ve as ba se c hunk s by r ew r i t i n g t e c hn i qu e s d e s i g n e d t o i m p r ove r es t o re pe rf o rma nc e. E x p e r i m e n t a l re su lts indi ca te t hat L oop D e l t a i ncr ea se s t he c o m pr e ss i o n r a t i o by 1 .2410 .97 t i m e s on t op of d e dup li c a - t i on , wi t hou t no t a b l y a ffe c t i n g th e ba ck up th rou ghpu t, a nd i t i m p r ove s t he res to re p er fo r m an ce b y 1.23.57 t i m e 

   more » « less
5. Characters of $$\pi '$$-degree and small cyclotomic fields

   https://doi.org/10.1007/s10231-020-01025-x  

   Giannelli, Eugenio; Hung, Nguyen Ngoc; Schaeffer Fry, A. A.; Vallejo, Carolina (June 2021, Annali di Matematica Pura ed Applicata (1923 -))

   null (Ed.)

   Abstract We show that every finite group of order divisible by 2 or q , where q is a prime number, admits a $$\{2, q\}'$$ { 2 , q } ′ -degree nontrivial irreducible character with values in $${\mathbb{Q}}(e^{2 \pi i /q})$$ Q ( e 2 π i / q ) . We further characterize when such character can be chosen with only rational values in solvable groups. These results follow from more general considerations on groups admitting a $$\{p, q\}'$$ { p , q } ′ -degree nontrivial irreducible character with values in $${\mathbb{Q}}(e^{2 \pi i /p})$$ Q ( e 2 π i / p ) or $${\mathbb{Q}}(e^{ 2 \pi i/q})$$ Q ( e 2 π i / q ) , for any pair of primes p and q . Along the way, we completely describe simple alternating groups admitting a $$\{p, q\}'$$ { p , q } ′ -degree nontrivial irreducible character with rational values. 

   more » « less