Five years ago I was posting a lot to a publication called NewCo Shift, which is now offline. I got ahold of the archives, and found this review, which hasn’t lost any of its relevance – in fact, it kind of reads like it was written last week.  Everyone in tech loves Yuval Noah Harari. … Continue reading "From the Archive: Tech Must Get Over Its Superman Complex, Or We’re All Screwed"

She likes Kamala's polices enough to put a lawn sign up on her property, but when one toll with a postcard personalizes those policies... she loses it.

The post Harris Supporter Outraged By Postcard Trolling… Did They Go Too Far? appeared first on Clash Daily.

Even after her loss on Nov. 5, Vice President Kamala Harris’ election campaign is still hounding donors for money. Harris’ campaign has bombarded supporters with fundraising messages following her election […]

The post Kamala's Campaign Is Still Aggressively Shaking Down Supporters For Cash appeared first on The Western Journal.

Just because you’re paranoid, it doesn’t mean you’re wrong. And for any supporters of President-elect Donald Trump who feel that they’ve been unfairly targeted by the government, but were summarily […]

The post Fired FEMA Worker Reveals Discrimination Against Trump Supporters Was Even Worse Than First Reported appeared first on The Western Journal.

Chinese supply chains could tip the balance in Ukraine Expert comment NCapeling 29 March 2023

Disrupting supply chains of critical minerals to those supporting Ukraine could give China a key advantage in its wider international trade competition.

Direct military intervention from China into the war on Ukraine, with Chinese troops and airmen appearing at the front line, would be highly escalatory and highly unlikely.

Equipping Russia with weapons and equipment is much more likely – if indeed it hasn’t already happened – and considering the West is supplying armaments to Ukraine, a joust with western technologies would be an interesting development to follow.

But if Chinese weapons underperform in the heat of battle, this may have implications for the current situation with Taiwan and the US, as a poor outcome on the Ukraine front could give the West more confidence over the tensions in the South China Sea. And the use of Chinese weapons in Ukraine would also be a feast for Western technical intelligence to capture.

Creating economic disruption

A much more likely development for China is to put in place export controls on critical minerals for Western powers supplying arms to Ukraine. This is a significant lever which China has used before during its fishing dispute with Japan in 2010 when hi-tech industrial production in Japan was affected by shortages of China-sourced critical minerals. Once normal supplies were resumed, Japan started to stockpile critical mineral reserves.

In October 2020, the Chinese Communist Party (CCP) passed a new statute enabling – when necessary – restriction of critical mineral supplies to third party nations intending to use them for defence and security applications, adding a ‘versatile weapon to Beijing’s arsenal’ in its trade competition with the US.

That legal control has been applied to Lockheed Martin production of Taiwan-bound F-35s and it applies not only to critical minerals mined on the Chinese mainland, but also to Chinese-controlled enterprises within international supply chains, of which there are many.

Responding to any such restrictions by opening up new mines and setting up new supply chains can take more than a decade, so the countries involved may need to start stockpiling critical materials as Japan has been doing since 2010.

Commodity markets also need to be ready for some interesting price wobbles – a persistent problem in critical minerals extractives investment as is overcoming environmental, social, and governance (ESG) challenges in this new game of global supplies.

In addition, those markets include the London Metal Exchange, now owned by Hong Kong Exchanges & Clearing whose biggest shareholder is the Hong Kong government which is struggling to operate with complete independence from Beijing.

Splitting the West’s consensus

By extending the thinking on China’s potential to throttle global critical mineral supply chains and the ensuing latency of extraction from new mining resources, progress to the Paris Agreement 2050 goals on climate change will inevitably be affected.

Given there are no supply chain assurance mechanisms, such as distributed ledger technologies, in place within global mining supply chains, a key issue to overcome would be how the West assures China that critical mineral supplies are not destined for military applications.

But if China’s default position becomes a total refusal to supply client nations unless end-to-end assurances can be achieved to prove non-military use, the West’s aspirations regarding the Paris 2050 goals will certainly be put in jeopardy, or even made unachievable.

Hdac3 is a lysine deacetylase that removes acetyl groups from histones and additional proteins. Although Hdac3 functions within mesenchymal lineage skeletal cells are defined, little is known about Hdac3 activities in bone-resorbing osteoclasts. In this study we conditionally deleted Hdac3 within Ctsk-expressing cells and examined the effects on bone modeling and osteoclast differentiation in mice. Hdac3 deficiency reduced femur and tibia periosteal circumference and increased cortical periosteal osteoclast number. Trabecular bone was likewise reduced and was accompanied by increased osteoclast number per trabecular bone surface. We previously showed that Hdac3 deacetylates the p65 subunit of the NF-κB transcriptional complex to decrease DNA-binding and transcriptional activity. Hdac3-deficient osteoclasts demonstrate increased K310 NF-κB acetylation and NF-κB transcriptional activity. Hdac3-deficient osteoclast lineage cells were hyper-responsive to RANKL and showed elevated ex vivo osteoclast number and size and enhanced bone resorption in pit formation assays. Osteoclast-directed Hdac3 deficiency decreased cortical and trabecular bone mass parameters, suggesting that Hdac3 regulates coupling of bone resorption and bone formation. We surveyed a panel of osteoclast-derived coupling factors and found that Hdac3 suppression diminished sphingosine-1-phosphate production. Osteoclast-derived sphingosine-1-phosphate acts in paracrine to promote bone mineralization. Mineralization of WT bone marrow stromal cells cultured with conditioned medium from Hdac3-deficient osteoclasts was markedly reduced. Expression of alkaline phosphatase, type 1a1 collagen, and osteocalcin was also suppressed, but no change in Runx2 expression was observed. Our results demonstrate that Hdac3 controls bone modeling by suppressing osteoclast lineage cell responsiveness to RANKL and coupling to bone formation.

Divided US support shows time is not on Ukraine’s side Expert comment LJefferson 17 February 2023

Growing public opinion evidence and uncertainty about the future of the war suggests that continued American support for aiding Ukraine should not be assumed.

One year into Russia’s war on Ukraine, fears that American support for Kyiv would rapidly wane have proven demonstrably wrong. Western financial and military backing has been robust thanks to allied unity and an unexpectedly mild winter. But, as financial analysts constantly remind us, past performance is no guarantee of future results.

People like to back winners. If the anticipated Russian spring offensive looks successful or the counterpart Ukrainian offensive is uninspiring, expect louder US voices calling for a negotiated settlement. The warning signs are already here.

American officials privately express growing apprehension that there will be an early resolution of the conflict. As one White House official recently observed to me, by the end of the year the war could well be about where it is today. And a plurality of Americans intuitively grasp this: 46 per cent believe neither Russia nor Ukraine currently has the advantage in the conflict.

Momentum matters  

In public opinion, perception of momentum matters. Americans’ support for the Vietnam War waned as the conflict persisted, falling from six-in-ten Americans in 1965 to four-in-ten in 1973.

Similarly, backing for the Iraq war fell from more than seven-in-ten in 2003 to barely four-in-ten in 2008. And with Afghanistan, as the war dragged on, support for US involvement fell from more than nine-in-ten in 2002 to less than five-in-ten in 2021. Notably, once the American public turned on these wars, support never returned.

Of course, Americans were fighting and dying in those wars, which is not the case in the Ukraine conflict. But initially the Vietnam, Iraq, and Afghanistan war support was buoyed by the belief that continued US engagement was justified, otherwise American sons and daughters had died in vain. With no American lives at stake in Ukraine, only financial and military resources, there is a growing wariness of throwing good money after bad.

In the last year, the share of Americans who say the United States is doing too much for Ukraine has nearly quadrupled, from seven to 26 per cent. And the portion that believe Washington has not done enough has halved, from 49 per cent to 17 per cent.

Sentiment about Ukraine support has become increasingly partisan. In March 2022, nine per cent of Republicans and five per cent of Democrats said the US was doing too much for Ukraine. By January 2023, 40 per cent of Republicans but just 15 per cent of Democrats complained Washington was doing too much.

This erosion of Americans’ support for Ukraine does not bode well for the future. Less than half (48 per cent) of the public in November, compared to 58 per cent in July, believed Washington should support Ukraine for as long as it takes, even if it means American households have to pay higher gas and food prices as a consequence.

A similar share, 47 per cent – up from 38 per cent in July – said the United States should urge Ukraine to settle for peace as soon as possible so the costs aren’t so great for American households, even if that means Ukraine will lose some territory.

A partisan divide

The partisan divide over Ukraine is largely driven by Republican political rhetoric during and after the 2022 midterm elections. Current Republican Speaker of the House Kevin McCarthy observed last October: ‘I think people are going to be sitting in a recession and they’re not going to write a blank cheque to Ukraine.’

More recently, in the wake of Ukrainian president Zelenskyy’s December speech to Congress, Florida Republican Representative Matt Gaetz, whose vote was pivotal in making McCarthy Speaker, tweeted: ‘Hemorrhaging billions in taxpayer dollars for Ukraine while our country is in crisis is the definition of America last.’

In January, newly-elected Ohio Republican Senator J.D. Vance told a Cleveland radio station that it was ‘ultimately not in our national security interest’ to send M1 Abrams tanks to Ukraine, despite the fact that they will be built by his constituents in Ohio.

In addition, ten Republican members of the House of Representatives have introduced legislation asserting ‘that the United States must end its military and financial aid to Ukraine, and urges all combatants to reach a peace agreement.’ 

And this month former President Donald Trump said: ‘That war has to stop, and it has to stop now, and it’s easy to do’ and it ‘can be negotiated within 24 hours’. Why worry about continued support for the war if it’s about to be over?

The road to 2024

With the 2024 US presidential election already revving up, Americans’ appetite for continued backing for Ukraine may hinge on how voters judge the Biden administration’s handling of the conflict.

Democrats are more than twice as likely as Republicans (61 per cent versus 27 per cent) to approve of the Biden administration’s response to the Russia invasion, suggesting Ukraine will be yet another partisan talking point as the campaign heats up. Notably, men are much more likely than women to approve of Biden’s efforts, as are older Americans compared with younger Americans.

Michael Dean
Jul 1, 2001; 42:1007-1017
Thematic Reviews

Supporting Next Generation of Leaders in Sustainability News Release NCapeling 28 January 2021

A new programme offering paid internships for young people who are passionate about social, economic, and environmental sustainability has been launched.

Supporting Civic Space: The Role and Impact of the Private Sector 23 September 2020 — 2:00PM TO 4:15PM Anonymous (not verified) 23 December 2020 Online

The meeting provides an opportunity to explore the drivers of – and barriers to – corporate activism.

A healthy civic space is vital for an enabling business environment. In recognition of this, a growing number of private sector actors are challenging, publicly or otherwise, the deteriorating environment for civic freedoms.

However, this corporate activism is often limited and largely ad hoc. It remains confined to a small cluster of multinationals leaving potential routes for effective coordination and collaboration with other actors underexplored.

This roundtable brings together a diverse and international group of business actors, civil society actors and foreign policy experts to exchange perspectives and experiences on how the private sector can be involved in issues around civic space.

The meeting provides an opportunity to explore the drivers of – and barriers to – corporate activism, develop a better understanding of existing initiatives, identify good practice and discuss practical strategies for the business community.

This meeting is the first of a series of roundtables at Chatham House in support of initiatives to build broad alliances for the protection of civic space. 

Supporting Civic Space: The Role and Impact of the Tech Sector 13 October 2020 — 2:00PM TO 4:15PM Anonymous (not verified) 23 December 2020 Online

This event brings together a diverse and international group of stakeholders to exchange perspectives and experiences on the role that tech actors can play in supporting civic space.

In a deteriorating environment for civic freedoms, tech sector actors are increasingly engaging, publicly or otherwise, on issues of civic space.

In the US, for example, a number of tech companies have cancelled contracts with the Pentagon and stopped censoring search results in China as a result of protests by employees. The Asia Internet Coalition recently wrote to Pakistan’s Prime Minister expressing human rights concerns about new rules regulating social media.

While we have recently seen technology companies show support for the social movements, including through substantial pledges, in some cases these have elicited criticism of hypocrisy, and the interventions of social media platforms on freedom of expression and privacy issues have been closely linked to the preservation of their own business models.

The COVID-19 crisis has also posed new dilemmas for the tech sector with the pervasiveness of disinformation, as well as new tools for tracking individuals which raise privacy issues.

This roundtable provides an opportunity to explore the drivers of (and barriers to) corporate activism, develop a better understanding of existing initiatives, identify good practice and routes to effective collaboration with other actors, and discuss practical strategies that could be adopted by the tech community.

It is the second of a series of roundtables at Chatham House in support of initiatives to build broad alliances for the protection of civic space.

Implications of post-COVID-19 Restructuring of Supply Chains for Global Investment Governance 14 July 2020 — 9:00AM TO 10:30AM Anonymous (not verified) 9 February 2021 Online

As companies rethink and diversify their supply chains in order to enhance resilience, what will this mean for current and future global investment governance?

What are the risks of negative effects on inclusivity and transparency? Does this shift create an opportunity to advance good governance of cross-border investment practices?

This event is part of the Inclusive Governance Initiative, which is examining how to build more inclusive models and mechanisms of global governance fit for purpose in today’s world.

Hepatocyte nuclear factor-1β (HNF-1β) is a tissue-specific transcription factor that is required for normal kidney development and renal epithelial differentiation. Mutations of HNF-1β produce congenital kidney abnormalities and inherited renal tubulopathies. Here, we show that ablation of HNF-1β in mIMCD3 renal epithelial cells results in activation of β-catenin and increased expression of lymphoid enhancer–binding factor 1 (LEF1), a downstream effector in the canonical Wnt signaling pathway. Increased expression and nuclear localization of LEF1 are also observed in cystic kidneys from Hnf1b mutant mice. Expression of dominant-negative mutant HNF-1β in mIMCD3 cells produces hyperresponsiveness to exogenous Wnt ligands, which is inhibited by siRNA-mediated knockdown of Lef1. WT HNF-1β binds to two evolutionarily conserved sites located 94 and 30 kb from the mouse Lef1 promoter. Ablation of HNF-1β decreases H3K27 trimethylation repressive marks and increases β-catenin occupancy at a site 4 kb upstream to Lef1. Mechanistically, WT HNF-1β recruits the polycomb-repressive complex 2 that catalyzes H3K27 trimethylation. Deletion of the β-catenin–binding domain of LEF1 in HNF-1β–deficient cells abolishes the increase in Lef1 transcription and decreases the expression of downstream Wnt target genes. The canonical Wnt target gene, Axin2, is also a direct transcriptional target of HNF-1β through binding to negative regulatory elements in the gene promoter. These findings demonstrate that HNF-1β regulates canonical Wnt target genes through long-range effects on histone methylation at Wnt enhancers and reveal a new mode of active transcriptional repression by HNF-1β.

Expert

The functional mechanisms of multidomain proteins often exploit interdomain interactions, or “cross-talk.” An example is human Pin1, an essential mitotic regulator consisting of a Trp–Trp (WW) domain flexibly tethered to a peptidyl-prolyl isomerase (PPIase) domain, resulting in interdomain interactions important for Pin1 function. Substrate binding to the WW domain alters its transient contacts with the PPIase domain via means that are only partially understood. Accordingly, we have investigated Pin1 interdomain interactions using NMR paramagnetic relaxation enhancement (PRE) and molecular dynamics (MD) simulations. The PREs show that apo-Pin1 samples interdomain contacts beyond the range suggested by previous structural studies. They further show that substrate binding to the WW domain simultaneously alters interdomain separation and the internal conformation of the WW domain. A 4.5-μs all-atom MD simulation of apo-Pin1 suggests that the fluctuations of interdomain distances are correlated with fluctuations of WW domain interresidue contacts involved in substrate binding. Thus, the interdomain/WW domain conformations sampled by apo-Pin1 may already include a range of conformations appropriate for binding Pin1's numerous substrates. The proposed coupling between intra-/interdomain conformational fluctuations is a consequence of the dynamic modular architecture of Pin1. Such modular architecture is common among cell-cycle proteins; thus, the WW–PPIase domain cross-talk mechanisms of Pin1 may be relevant for their mechanisms as well.

Sino-Russian Gas Cooperation: Power of Siberia I and II and Implications for Global LNG Supplies 27 November 2019 — 8:30AM TO 9:30AM Anonymous (not verified) 19 November 2019 Chatham House | 10 St James's Square | London | SW1Y 4LE

In a new event in the Sustainable Transitions series, the speaker will present an update of Sino-Russian gas cooperation.

To give a comprehensive account of their impact on global liquefied natural gas (LNG) supplies, he will discuss the following points:

• Gas is scheduled to start flowing from the Power of Siberia I (POS) on 2 December 2019. But what is the background of development of POS 1 and what is its current status and prospects?
• What are the chances of exporting gas through the proposed Altai pipeline? Why is the Mongolia export route so significant? And how will it affect the Central Asian Republics and in particular Turkmenistan’s gas export to China?
• What are the implications of both POS I and Altai gas via Mongolia route in the context of global LNG supply?
• What are the prospects for multilateral pipeline gas cooperation in northeast Asia?
• What are the implications for other Arctic onshore LNG supply, in particular, for Novatek’s Yamal LNG and Arctic LNG 1 and 2 to China on top of POS 1 and Altai gas?

Attendance at this event is by invitation only.

Stacey Finley from University of Southern California discusses how mathematical models support the research of cancer biology. Cancer research is a crucial job, but a difficult one. Tumors growing inside the human body are affected by all kinds of factors. These conditions are difficult (if not impossible) to recreate in the lab, and using real patients as subjects can be painful and invasive. Mathematical models give cancer researchers the ability to run experiments virtually, testing the effects of any number of factors on tumor growth and other processes — all with far less money and time than an experiment on human subjects or in the lab would use.

Dr. Outi Tervo of Greenland Institute for Natural Resources, shares how mathematics helps recommend speed limits for marine vessels, which benefits narwhals and Inuit culture. Narwhals "can only be found in the Arctic," said Outi Tervo, a senior scientist at GINR. "These species are going to be threatened by climate change more than other species that can live in a bigger geographical area." The collaboration has already lobbied on behalf of the narwhals to reduce the level of sea traffic in their habitat, after using mathematical analysis to identify how noise from passing boats changes the narwhals' foraging behavior.

Abdessamad Dehaj and Mohamed Guessous
Theor. Probability and Math. Statist. 111 (), 1-8.
Abstract, references and article information

A police sergeant who was shot and injured at his home in Portmore, St Catherine, on Thursday night succumbed to his injuries on Monday morning.

In addition to their well-known role in the control of cellular proliferation and cancer, cell cycle regulators are increasingly identified as important metabolic modulators. Several GWAS have identified SNPs near CDKN2A, the locus encoding for p16INK4a (p16), associated with elevated risk for cardiovascular diseases and type-2 diabetes development, two pathologies associated with impaired hepatic lipid metabolism. Although p16 was recently shown to control hepatic glucose homeostasis, it is unknown whether p16 also controls hepatic lipid metabolism. Using a combination of in vivo and in vitro approaches, we found that p16 modulates fasting-induced hepatic fatty acid oxidation (FAO) and lipid droplet accumulation. In primary hepatocytes, p16-deficiency was associated with elevated expression of genes involved in fatty acid catabolism. These transcriptional changes led to increased FAO and were associated with enhanced activation of PPARα through a mechanism requiring the catalytic AMPKα2 subunit and SIRT1, two known activators of PPARα. By contrast, p16 overexpression was associated with triglyceride accumulation and increased lipid droplet numbers in vitro, and decreased ketogenesis and hepatic mitochondrial activity in vivo. Finally, gene expression analysis of liver samples from obese patients revealed a negative correlation between CDKN2A expression and PPARA and its target genes. Our findings demonstrate that p16 represses hepatic lipid catabolism during fasting and may thus participate in the preservation of metabolic flexibility.

Review: the rise of Africa’s superwomen The World Today mhiggins.drupal 1 August 2022

From foster care in England to colonialism’s legacy in Zimbabwe, this set of essays on race, feminism and identity is searingly honest, says Masiyaleti Mbewe.

Black and Female
Tsitsi Dangarembga, Faber, £9.99

The 1988 novel Nervous Conditions by the Zimbabwean author Tsitsi Dangarembga is considered one of Africa’s finest literary exports. It won the Commonwealth Writers’ Prize and alongside The Book of Not (2006) and This Mournable Body (2018), shortlisted for the 2020 Booker Prize, forms a trilogy of semi-autobiographical novels that grapple with the gendered colonial oppression of young black girls and women from Southern Rhodesia through to Zimbabwe. 

In Black and Female, Dangarembga continues the interrogation of these intersections in an unflinchingly honest and personal, if occasionally dense, collection of essays. Along the way, she examines the sheer magnitude of colonialism’s effects on African people, and how they ripple through her early childhood in England and her formative years as a writer, filmmaker and feminist activist in post-independence Zimbabwe.

‘Writing While Black and Female’

In 1961 Dangarembga’s parents relocated from Southern Rhodesia to the UK. While they worked and studied in London, they put their two-year-old daughter, her older brother and, later, her younger sister into private foster care in Dover, Kent (as many Africans did – a fact that was new to me). The first essay, ‘Writing While Black and Female’, takes a painful look at the four years she spent with her foster parents, Mummy-Gran and Daddy Henry. 

Blackness, she learned in those years, was a consequence of her non-whiteness. So Dangarembga writes of the momentary elation she felt when a stranger addressed her as a ‘lovely little piccaninny’, giving her ‘a category I could wield against the void of no longer being’. To cope with this sort of racialization and her abandonment, the young Dangarembga turned to disassociation and self-harm. 

As she writes: ‘Blackness is a condition imposed on me, rather than being an experienced identity.’ Instead of ‘black’ people, therefore, Dangarembga prefers the term ‘highly melanated people’. It is a resonant phrase, highlighting the inherently ridiculous nature of racism.

Dangarembga’s ‘Africanness’ shifts into focus upon her return to Rhodesia in 1965. At first, other children refused to play with her and her siblings, calling them ‘varungu’ (white people). As she describes it: ‘The dance of my identities … became frenetic’. 

In ‘Black, Female and the Superwoman Black Feminist’, the second essay, Dangarembga is adamant about the urgent necessity of a black feminist practice that is centred on action to provide real, material change. Along the way, she makes a distinction – a slightly uneasy one to my mind – between the patriarchy that western colonization imposed, based on private ownership, and the patriarchy of pre-colonial African society with its foundations in kinship that devolved power to an extent.

‘Hence women could and did become rulers and warriors, and royal spirit mediums called mhondoro,’ Dangarembga writes approvingly. She is making a nuanced point; but the idea of a more accommodating sort of patriarchy jars a little nonetheless.

While independence may have arrived for Zimbabwe more than 40 years ago, Dangarembga argues strongly that the subjugation of women and feminists at the hands of the ruling Zanu-PF government continues as an extension of colonial rule. Indeed, beyond Zimbabwe, black feminists remain ‘a small, often embattled group’ across Africa, believes Dangarembga. 

As a young black feminist who is part of this ‘small, embattled group’, I should say we have been able to foster large communities digitally and otherwise to work around the hostility we are often faced with. Despite internet shutdowns and restrictions, we resist – an act Dangarembga encourages.  

Resistance, she says, starts with establishing community despite these difficulties. At the nucleus of Dangarembga’s argument is the ‘superwoman’ of the essay’s title, the African woman who doesn’t require external factors to be inspired to action but who continuously draws on what Dangarembga calls ‘internal agency’ that derives from ‘an unrelenting fight for survival and dignity’.

Pointedly, she criticizes global feminism’s greater focus on optics than activism in the practical sense. One only has to observe the performative allyship and ‘Instagram activism’ rampant on the internet today to see her point.
 

The complexities of decolonization

In the final essay, ‘Decolonization as Revolutionary Imagining’, Dangarembga turns her gaze upon the ‘highly stratified’ European societies that outsourced their violent inequality to their empires and ‘the work of decolonization’. However, decolonial discourse is complex, and it is here that the writing occasionally gets bogged down. Fewer recommendations with more elaboration perhaps would have helped.

She herself acknowledges the difficulties of decolonization. Centuries of the Enlightenment and its logic of ‘racism, slavery, genocide and colonization’ are hard to uproot ‘whatever one’s melanin concentration’, she writes.

Nevertheless, Dangarembga concludes with the radical determination to dismantle that is evident throughout this searing yet hopeful collection: ‘The trajectory of current and future generations depends on that uprooting.’

Africa Aware: Supply chains, land contestation, conflict Audio NCapeling 30 March 2023

This episode examines relations between Ethiopia and Sudan as part of an XCEPT project mini-series.

The war in northern Ethiopia since November 2020, and subsequent conquest of disputed farmlands in Al-Fashaga by the Sudanese army on the Ethiopia-Sudan border, has brought into focus the importance of agricultural commodities such as sesame as a potential driver of land contestation and conflict. 

The panel discusses the interrelation of commodity and conflict supply chains, land contestation, and boundary disputes in the Horn of Africa, with a particular focus on the regions of Wolkait/Western Tigray in northwest Ethiopia and Al Fashaga in eastern Sudan.

This podcast was produced with support from the Cross-Border Conflict Evidence, Policy and Trends (XCEPT) project, funded by UK Aid from the UK government.

Visual Abstract

The kinesin-3 family contains the fastest and most processive motors of the three neuronal transport kinesin families, yet the sequence of states and rates of kinetic transitions that comprise the chemomechanical cycle and give rise to their unique properties are poorly understood. We used stopped-flow fluorescence spectroscopy and single-molecule motility assays to delineate the chemomechanical cycle of the kinesin-3, KIF1A. Our bacterially expressed KIF1A construct, dimerized via a kinesin-1 coiled-coil, exhibits fast velocity and superprocessivity behavior similar to WT KIF1A. We established that the KIF1A forward step is triggered by hydrolysis of ATP and not by ATP binding, meaning that KIF1A follows the same chemomechanical cycle as established for kinesin-1 and -2. The ATP-triggered half-site release rate of KIF1A was similar to the stepping rate, indicating that during stepping, rear-head detachment is an order of magnitude faster than in kinesin-1 and kinesin-2. Thus, KIF1A spends the majority of its hydrolysis cycle in a one-head-bound state. Both the ADP off-rate and the ATP on-rate at physiological ATP concentration were fast, eliminating these steps as possible rate-limiting transitions. Based on the measured run length and the relatively slow off-rate in ADP, we conclude that attachment of the tethered head is the rate-limiting transition in the KIF1A stepping cycle. Thus, KIF1A's activity can be explained by a fast rear-head detachment rate, a rate-limiting step of tethered-head attachment that follows ATP hydrolysis, and a relatively strong electrostatic interaction with the microtubule in the weakly bound post-hydrolysis state.

Elisa Vidal
Dec 1, 2020; 61:1733-1746
Research Articles

Since the publication of the Age-Related Eye Disease Study (AREDS2) in 2013, the macular pigment carotenoids lutein and zeaxanthin have become well known to both the eye care community and the public. It is a fascinating aspect of evolution that primates have repurposed photoprotective pigments and binding proteins from plants and insects to protect and enhance visual acuity. Moreover, utilization of these plant-derived nutrients has been widely embraced for preventing vision loss from age-related macular degeneration (AMD). More recently, there has been growing awareness that these nutrients can also play a role in improving visual performance in adults. On the other hand, the potential benefits of lutein and zeaxanthin supplementation at very young ages have been underappreciated. In this review, we examine the biochemical mechanisms and supportive data for lutein and zeaxanthin supplementation throughout the lifespan, with particular emphasis on prenatal supplementation. We propose that prenatal nutritional recommendations may aim at improving maternal and infant carotenoid status. Prenatal supplementation with lutein and zeaxanthin might enhance infant visual development and performance and may even prevent retinopathy of prematurity, possibilities that should be examined in future clinical studies.

Spatial changes of FAs in the retina in response to different dietary n-3 formulations have never been explored, although a diet rich in EPA and DHA is recommended to protect the retina against the effects of aging. In this study, Wistar rats were fed for 8 weeks with balanced diet including either EPA-containing phospholipids (PLs), EPA-containing TGs, DHA-containing PLs, or DHA-containing TGs. Qualitative changes in FA composition of plasma, erythrocytes, and retina were evaluated by gas chromatography-flame ionization detector. Following the different dietary intakes, changes to the quantity and spatial organization of PC and PE species in retina were determined by LC coupled to MS/MS and MALDI coupled to MS imaging. The omega-3 content in the lipids of plasma and erythrocytes suggests that PLs as well as TGs are good omega-3 carriers for retina. However, a significant increase in DHA content in retina was observed, especially molecular species as di-DHA-containing PC and PE, as well as an increase in very long chain PUFAs (more than 28 carbons) following PL-EPA and TG-DHA diets only. All supplemented diets triggered spatial organization changes of DHA in the photoreceptor layer around the optic nerve. Taken together, these findings suggest that dietary omega-3 supplementation can modify the content of FAs in the rat retina.

The assembly of the postsynaptic transmitter sensing machinery at inhibitory nerve cell synapses requires the intimate interplay between cell adhesion proteins, scaffold and adaptor proteins, and γ-aminobutyric acid (GABA) or glycine receptors. We developed an in vitro membrane system to reconstitute this process, to identify the essential protein components, and to define their mechanism of action, with a specific focus on the mechanism by which the cytosolic C terminus of the synaptic cell adhesion protein Neuroligin-2 alters the conformation of the adaptor protein Collybistin-2 and thereby controls Collybistin-2-interactions with phosphoinositides (PtdInsPs) in the plasma membrane. Supported hybrid membranes doped with different PtdInsPs and 1,2-dioleoyl-sn-glycero-3-{[N-(5-amino-1-carboxypentyl)iminodiacetic acid]succinyl} nickel salt (DGS-NTA(Ni)) to allow for the specific adsorption of the His6-tagged intracellular domain of Neuroligin-2 (His-cytNL2) were prepared on hydrophobically functionalized silicon dioxide substrates via vesicle spreading. Two different collybistin variants, the WT protein (CB2SH3) and a mutant that adopts an intrinsically 'open' and activated conformation (CB2SH3/W24A-E262A), were bound to supported membranes in the absence or presence of His-cytNL2. The corresponding binding data, obtained by reflectometric interference spectroscopy, show that the interaction of the C terminus of Neuroligin-2 with Collybistin-2 induces a conformational change in Collybistin-2 that promotes its interaction with distinct membrane PtdInsPs.

Cooking in Displacement Settings: Engaging the Private Sector in Non-wood-based Fuel Supply Research paper sysadmin 22 January 2019

In displacement settings, providing cooking solutions that reduce negative impacts on the environment and health remains a challenge for local governments, humanitarian agencies, businesses and refugees.

Summary

• Providing adequate cooking fuel and clean-burning, fuel-efficient stoves in displacement settings has long been a major challenge for local authorities, humanitarian agencies, non-governmental organizations, local communities and refugees themselves. Refugees generally have limited access to modern cooking solutions. Most either depend on insufficient humanitarian agency handouts of ‘in-kind’ firewood or have to travel long distances to collect firewood.
• There is significant potential for private-sector engagement in this context – which, though largely overlooked to date, could result in win-win scenarios for all stakeholders. Refugee camps and other displacement settings present opportunities for private-sector cooking fuel companies to expand their customer bases, with the added advantage for vendors of offering concentrated demand and scope for economies of scale.
• For the Kakuma refugee camp complex in Kenya, the Moving Energy Initiative (MEI) decided to engage with the private sector directly. The MEI requested expressions of interest from local private-sector companies for expanding sales and distribution of fuels in the complex through the concession. The winning company – National Oil Corporation of Kenya – is to receive a prize of $50,000 for its proposed concession to supply liquefied petroleum gas both to refugees in the Kakuma complex and to the surrounding host community.
• The MEI also conducted interviews with various stakeholders in other contexts and countries who are engaged in efforts to develop market-based approaches to providing clean, fuel-efficient cooking solutions to refugees.
• Based on the interviews and the concession process, the MEI recommends greater donor investment and longer-term guaranteed funding for cooking interventions. This is needed to allow sufficient time to build sustainable markets and secure the requisite engagement and investments from the private sector.
• Larger, longer-term investments by the private sector – supported through partnerships with donors and humanitarian agencies – in infrastructure and demand creation (both in and outside the refugee community) can reduce the price of alternative solutions and support a gradual transition away from subsidies.

Angola Forum 2021: Policy options to support economic recovery in Angola 7 October 2021 — 2:00PM TO 5:00PM Anonymous (not verified) 22 September 2021 Online

Speakers discuss policy options to support economic recovery in Angola as the country transitions away from a state-led oil economy to a private-sector-led growth model.

The government of Angola has made some progress on a range of policies targeting macroeconomic stability and structural reform. However, the country has been suffering from a recurring economic recession for six consecutive years, with the last positive annual GDP growth rate posted in 2015 at 0.9 per cent.

The national budget remains dependent on oil revenue, leaving the country highly exposed to volatile oil prices particularly during the COVID-19 pandemic. While revenues collapsed, increased spending was needed to respond to the health crisis and estimates of Angola’s debt spike range from 130 to 150 per cent of its GDP by the close of 2020.

At this virtual Angola Forum, speakers discuss policy options to support economic recovery in Angola as the country transitions away from a state-led oil economy to a private-sector-led growth model.

The Forum launches the English translation of the Angola Economic Report 2019-20 by the Centro de Estudos de Investigação (CEIC) of the Catholic University of Angola in partnership with the Konrad-Adenauer-Stiftung (KAS), and the findings of Afrobarometer’s first ever survey in Angola, Ovilongwa – Estudos de Opinião Pública, which interviewed 2,400 adult Angolans and sampled individual perceptions on democracy and economic reform in Angola.

This event will be held in English and Portuguese with simultaneous interpretation.

The Forum will also be broadcast live on the Africa Programme Facebook page.

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