Antiblack racism avows reason is white while emotion, and thus supposedly unreason, is black. Challenging academic adherence to this notion, Lewis R. Gordon offers a portrait of ...Martinican-turned-Algerian revolutionary psychiatrist and philosopher Frantz Fanon as an exemplar of "living thought" against forms of reason marked by colonialism and racism. Working from his own translations of the original French texts, Gordon critically engages everything in Fanon from dialectics, ethics, existentialism, and humanism to philosophical anthropology, phenomenology, and political theory as well as psychiatry and psychoanalysis. Gordon takes into account scholars from across the Global South to address controversies around Fanon's writings on gender and sexuality as well as political violence and the social underclass. In doing so, he confronts the replication of a colonial and racist geography of reason, allowing theorists from the Global South to emerge as interlocutors alongside northern ones in a move that exemplifies what, Gordon argues, Fanon represented in his plea to establish newer and healthier human relationships beyond colonial paradigms.
In this undergraduate textbook Lewis R. Gordon offers the first comprehensive treatment of Africana philosophy, beginning with the emergence of an Africana (i.e. African diasporic) consciousness in ...the Afro-Arabic world of the Middle Ages. He argues that much of modern thought emerged out of early conflicts between Islam and Christianity that culminated in the expulsion of the Moors from the Iberian Peninsula, and from the subsequent expansion of racism, enslavement, and colonialism which in their turn stimulated reflections on reason, liberation, and the meaning of being human. His book takes the student reader on a journey from Africa through Europe, North and South America, the Caribbean, and back to Africa, as he explores the challenges posed to our understanding of knowledge and freedom today, and the response to them which can be found within Africana philosophy.
A review of terahertz detectors Lewis, R A
Journal of physics. D, Applied physics,
10/2019, Letnik:
52, Številka:
43
Journal Article
Recenzirano
Physics is the interplay of energy and matter. Energy, in the form of light, interacting with matter, principally in the solid state, underpins this topical review. The subject is developed carefully ...and methodically, beginning with basic definitions pertaining to terahertz detectors and terahertz radiation, then proceeding systematically to delineate characteristics of terahertz photons and terahertz detectors in more detail. In-between, the intimate connection linking terahertz sensors and terahertz sources is highlighted-an important aspect unfortunately often overlooked or ignored when terahertz detectors are discussed in isolation. At the centre of this topical review are the various physical mechanisms by which electromagnetic radiation of terahertz frequencies interacts with matter. The logic is to present first the underlying physical principles of detection before presenting the practical implementation in a specific device, rather than the other way around. A taxonomy of terahertz detectors is then proposed based on the underlying physical principles of detection. Following on from this classification, state-of-the-art terahertz detectors are surveyed and appraised; this overview constitutes the longest section of the review. Key detector parameters which inform applications are then presented and tabulated. Finally, the present state-of-the-art is anchored within the wider scientific context of historical developments and future prospects.
The eminent scholar Lewis R. Gordon offers a probing meditation on freedom, justice, and decolonization. What is there to be understood and done when it is evident that the search for justice, which ...dominates social and political philosophy of the North, is an insufficient approach for the achievements of dignity, freedom, liberation, and revolution? Gordon takes the reader on a journey as he interrogates a trail from colonized philosophy to re-imagining liberation and revolution to critical challenges raised by Afropessimism, theodicy, and looming catastrophe. He offers not forecast and foreclosure but instead an urgent call for dignifying and urgent acts of political commitment. Such movements take the form of examining what philosophy means in Africana philosophy, liberation in decolonial thought, and the decolonization of justice and normative life. Gordon issues a critique of the obstacles to cultivating emancipatory politics, challenging reductionist forms of thought that proffer harm and suffering as conditions of political appearance and the valorization of nonhuman being. He asserts instead emancipatory considerations for occluded forms of life and the irreplaceability of existence in the face of catastrophe and ruin, and he concludes, through a discussion with the Circassian philosopher and decolonial theorist, Madina Tlostanova, with the project of shifting the geography of reason.
A review of terahertz sources Lewis, R A
Journal of physics. D, Applied physics,
09/2014, Letnik:
47, Številka:
37
Journal Article
Recenzirano
Odprti dostop
Bibliometric data set the scene by illustrating the growth of terahertz work and the present interest in terahertz science and technology. After locating terahertz sources within the broader context ...of terahertz systems, an overview is given of the range of available sources, emphasizing recent developments. The focus then narrows to terahertz sources that rely on surface phenomena. Three are highlighted. Optical rectification, usually thought of as a bulk process, may in addition exhibit a surface contribution, which, in some cases, predominates. Transient surface currents, for convenience often separated into drift and diffusion currents, are well understood according to Monte Carlo modelling. Finally, terahertz surface emission by mechanical means-in the absence of photoexcitation-is described.
We investigate the possibility of qq^{'}bover ¯bover ¯ tetraquark bound states using n_{f}=2+1 lattice QCD ensembles with pion masses ≃164, 299, and 415 MeV. Motivated by observations from heavy ...baryon phenomenology, we consider two lattice interpolating operators, both of which are expected to couple efficiently to tetraquark states: one with a diquark-antidiquark and one with a meson-meson structure. Using nonrelativistic QCD to simulate the bottom quarks, we study the udbover ¯bover ¯, ℓsbover ¯bover ¯ channels with ℓ=u, d, and find unambiguous signals for strong-interaction-stable J^{P}=1^{+} tetraquarks. These states are found to lie 189(10) and 98(7) MeV below the corresponding free two-meson thresholds.
Hepatocellular carcinoma (HCC) is the fourth most common cause of cancer-related death worldwide. Risk factors for HCC include chronic hepatitis B and hepatitis C, alcohol addiction, metabolic liver ...disease (particularly nonalcoholic fatty liver disease) and exposure to dietary toxins such as aflatoxins and aristolochic acid. All these risk factors are potentially preventable, highlighting the considerable potential of risk prevention for decreasing the global burden of HCC. HCC surveillance and early detection increase the chance of potentially curative treatment; however, HCC surveillance is substantially underutilized, even in countries with sufficient medical resources. Early-stage HCC can be treated curatively by local ablation, surgical resection or liver transplantation. Treatment selection depends on tumour characteristics, the severity of underlying liver dysfunction, age, other medical comorbidities, and available medical resources and local expertise. Catheter-based locoregional treatment is used in patients with intermediate-stage cancer. Kinase and immune checkpoint inhibitors have been shown to be effective treatment options in patients with advanced-stage HCC. Together, rational deployment of prevention, attainment of global goals for viral hepatitis eradication, and improvements in HCC surveillance and therapy hold promise for achieving a substantial reduction in the worldwide HCC burden within the next few decades.
We demonstrate the coherent creation of a single NaCs molecule in its rotational, vibrational, and electronic (rovibronic) ground state in an optical tweezer. Starting with a weakly bound Feshbach ...molecule, we locate a two-photon transition via the |c^{3}Σ_{1},v^{'}=26⟩ excited state and drive coherent Rabi oscillations between the Feshbach state and a single hyperfine level of the NaCs rovibronic ground state |X^{1}Σ,v^{''}=0,N^{''}=0⟩ with a binding energy of D_{0}=h×147044.63(11) GHz. We measure a lifetime of 3.4±1.6 s for the rovibronic ground state molecule, which possesses a large molecule-frame dipole moment of 4.6D and occupies predominantly the motional ground state. These long-lived, fully quantum-state-controlled individual dipolar molecules provide a key resource for molecule-based quantum simulation and information processing.
The pathogenesis of hepatocellular carcinoma (HCC) is poorly understood, but recent advances in genomics have increased our understanding of the mechanisms by which hepatitis B virus, hepatitis C ...virus, alcohol, fatty liver disease, and other environmental factors, such as aflatoxin, cause liver cancer. Genetic analyses of liver tissues from patients have provided important information about tumor initiation and progression. Findings from these studies can potentially be used to individualize the management of HCC. In addition to sorafenib, other multi-kinase inhibitors have been approved recently for treatment of HCC, and the preliminary success of immunotherapy has raised hopes. Continued progress in genomic medicine could improve classification of HCCs based on their molecular features and lead to new treatments for patients with liver cancer.
Hepatocellular carcinoma: A global view Yang, Ju Dong; Roberts, Lewis R
Nature reviews. Gastroenterology & hepatology,
08/2010, Letnik:
7, Številka:
8
Journal Article
Recenzirano
Odprti dostop
Hepatocellular carcinoma (HCC) is a global health problem, although developing countries are disproportionally affected: over 80% of HCCs occur in such regions. About three-quarters of HCCs are ...attributed to chronic HBV and HCV infections. In areas endemic for HCV and HBV, viral transmission occurs at an early age, and infected individuals develop HCC in mid-adulthood. As these are their most productive years of life, HCC accounts for a substantial burden on the health-care system and drain of productive capacity in the low-income and middle-income countries most affected by HCV and HBV infections. Environments with disparate resource levels require different strategies for the optimal management of HCC. In high-resource environments, guidelines from the American Association for the Study of Liver Diseases or European Association for the Study of the Liver should be applied. In intermediate-resource or low-resource environments, the fundamental focus should be on primary prevention of HCC, through universal HBV vaccination, taking appropriate precautions and antiviral treatments. In intermediate-resource and low-resource environments, the infrastructure and capacity for abdominal ultrasonography, percutaneous ethanol injection, radiofrequency ablation and surgical resection should be established. Programs to provide targeted therapy at low cost, similar to the approach used for HIV therapy in the developing world, should be pursued.
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